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LTH Electronics MTD75, Operation Manual

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LTH Electronics MTD75 Operation Manual Download Page 55

 

 

 

 
 
 
 
 
 
 
 

 

 

 

 

Connections 

 

 

 

MTD75 Operation Guide

 

 

- 53 - 

 

 

 

 

 

Connections

Modbus RS485 

 

In the EIA/TIA-485 standard, two versions (cable type A and B) are specified for the bus line 
and can be used for all transmission rates. However, we recommend you use cable type A. 
The cable specification for cable type A is provided in the following table: 

 

Cable Type A 
Characteristic 
Impedance

135 to 165Ω at a measuring frequency of 3 to 
20Mhz

Cable Capacitance 

<30pF/m

Core Cross-section 

>AWG22 

Cable Type

Twisted Pairs

Loop Resistance 

≤100Ω/km

Signal damping 

Max 9 dB over the entire cable cross-section 

Shielding 

Copper braided shielding or braided shielding 
and foil shielding 

 

Note the following when designing the bus structure: 

 

 

Using cable type A and with a transmission rate of 9600 Baud, the maximum line length 
(segment length) of the MODBUS RS485 system is 10000 meters. The total length of the 
spurs may not exceed a maximum of 6.6 meters. 

 

A maximum of 32 devices are permitted per segment. 

 

Each segment is terminated at either end with a 120 Ω terminating resistor (not 
supplied). 

 

The bus length or the number of devices can be increased by introducing a repeater. 

 

 

 

MTD75 MODBUS RS485 CONNECTION DETAILS 

Summary of Contents for MTD75

Page 1: ...MTD75 Cooling Tower Controller Operation Guide ...

Page 2: ......

Page 3: ...e replacement of defective materials or workmanship There are no user serviceable parts including fuses etc within the unit Any attempt to dismantle the controller will invalidate the warranty Disclaimer LTH Electronics Ltd reserves the right to make changes to this manual or the controller without notice as part of our policy of continued developments and improvements All care has been taken to e...

Page 4: ...nd regulations set down by both the United Kingdom Equipment Restriction of Hazardous Substances Regulations S I 2012 3032 and the European Restriction of Hazardous Substances Directive 2011 65 EU using BS EN IEC 63000 2018 Quality This instrument has been manufactured under the following quality standard ISO 9001 2015 Certificate No FM 13843 Note The standards referred to in the design and constr...

Page 5: ...Preface MTD75 Operation Guide 3 Declaration of Conformity ...

Page 6: ...Preface 4 MTD75 Operation Guide ...

Page 7: ...ections 31 Current Output Connections 33 Redox Input Termination Information 36 Electrodeless Conductivity Input Termination Information 42 pH Input Termination Information 47 Digital Inputs 52 Modbus RS485 53 SD Card Interface 54 User Interface 55 The Front Screens 55 The Menu System 56 Security Code Access 58 Access Code Management 59 Enter New Code 60 Biocide A Control Functions 61 Dosing by Vo...

Page 8: ...leeding 73 Bleeding By Conductivity Level 73 Bleed Alarm Timer 73 Manual Bleeding 73 Bleed Menu 74 Inhibitor Control Functions 79 Dosing By Volume 79 Timed Dosing 79 Dosing By Bleed Duration 79 Dosing From The Water Meter 79 Output Configuration 79 Bleed Inhibiting 80 Pre Dose Bleeding 80 Manual Dosing 80 Inhibitor Menu 80 pH Control Functions 87 Dosing By Volume 87 Timed Dosing 87 Dosing By pH Le...

Page 9: ...Conductivity Input Channel Calibration 117 pH Input Channel Calibration 125 Resetting the User Calibration 139 Current Outputs 141 Current Output Calibration 143 Digital Inputs 147 Configuration 151 Update Software 157 Optional Software Functions 159 Save Restore Reset 161 Error Messages 163 Modbus RS485 165 Data Logging 171 Live Trending 171 Setup Live Trending 171 Live Trend Screen 174 SD Card D...

Page 10: ... Setup 183 Appendix C Temperature Coefficient 196 Appendix D Modbus RS485 Registers 197 Standard Value Tables 232 Appendix E Modbus RS485 Coils 233 Appendix F Modbus RS485 Discretes 235 Appendix G Error Messages 245 Appendix H Fault Finding 253 Index 260 ...

Page 11: ... can provide a more accurate dosing and bleeding scheme Utilising a multifunction easy to read QVGA LCD the controller displays readings and provides feedback to the operator on the status of the sensors and the controller s outputs The unit possess and optionally activated RS485 Modbus interface to allow for remote access configuration and control of the controller Finally the controller also fea...

Page 12: ...Introduction 10 MTD75 Operation Guide Introduction MXD75 Termination Overview ...

Page 13: ...sible on the front panel The Biocide A output can be initiated manually through the menu system to permit testing and priming of the system Biocide B Output User defined Biocide B dose duration triggered from one of the user selectable sources Water Volume From Water Meter Input Timed Per week day hour Division of the Water Meter Input X input pulses give one output pulse Multiply by the Water Met...

Page 14: ...ter Meter Input Timed Per week day hour Bleed After accumulated Bleed Time Division of the Water Meter Input X input pulses give one output pulse Multiply by the Water Meter Input One input pulse gives X output pulses External Input Contact Closure User selectable On Off or Pulsed output Contact closure and 250VAC supply terminals provided fused to 2A accessible on the front panel The Inhibitor ou...

Page 15: ...t rated at 5A 30V DC 5A 250VAC non inductive User configurable to energise on Power On Input Error Dose Alarm Timeout Water Meter Timeout Flow Switch Tank Level Alarm Any Error Redox Measurement Input Optional Single ended or differential with solution ground Up to 100 meters cable Separate glass and reference electrode pair Combination electrode Other manufacturer s sensors can be accommodated Re...

Page 16: ... or PT1000 Temperature Range of Measurement 50 C to 160 C Temperature Accuracy 0 2 C When using a 4 wire PT1000 ECS 0 2 C When using a 3 wire PT1000 pH Redox Linearity 0 1 of range Repeatability 0 1 of range Operator Adjustment Slope Offset Redox NA 400mV Electrodeless Conductivity 10 NA pH 60 120 3 to 11pH Temperature NA 50 C Current Outputs Optional 4 Current Outputs each selectable 0 20mA or 4 ...

Page 17: ...32 cards supported Data Logging Optional 3 User configurable Live Trending Screens of 2 readings Data Logging All Operating Values to SD Card User defined Trend and log Interval User defined Time Date to View data from the SD Card onto the unit Display 3 QVGA back lit LCD module Buttons 5 tactile feedback micro switched silicone rubber Alarm LED s 2 Yellow LED s located above the main display area...

Page 18: ... MTD75 Operation Guide Introduction Controller Housing UL 94 V0 PC ABS Ingress Protection IP66 to IEC 60529 Weight Maximum 2 7 kilograms controller only Dimensions 331 x 242 x 117 mm H W D excluding mounting brackets ...

Page 19: ...ADE TO THE EARTH TERMINAL OF THIS CONTROLLER LOCAL WIRING AND SAFETY REGULATIONS SHOULD BE STRICTLY ADHERED TO WHEN INSTALLING THIS UNIT SHOULD THESE REGULATIONS CONFLICT WITH THE FOLLOWING INSTRUCTIONS CONTACT LTH ELECTRONICS OR AN AUTHORISED LOCAL DISTRIBUTOR FOR ADVICE To maintain the specified levels of Electro Magnetic Compatibility EMC susceptibility to and emission of electrical noise trans...

Page 20: ...con control rectifiers that are phase angle fired The controller is designed with a high degree of noise rejection built in to minimise the potential for interference from these sources but it is recommended that you apply the following wiring practices as an added precaution Cables transmitting low level signals should not be routed near contactors motors generators radio transmitters or wires ca...

Page 21: ...ut cards and 1 output option card The sensor input cards are designated Input Card 1 Input Card 2 and Input Card 3 Unlike the rest of the MXD70 Series the input and output cards are fixed as following Fixed Type Card LTH Order No Input Card 1 Redox pH Redox Input Card 2002 Input Card 2 Electrodeless Conductivity Electrodeless Conductivity Input Card 1201 Input Card 3 pH pH Redox Input Card 2002 Ou...

Page 22: ...e Add in cards Input cards 1 2 are installed via the use of headers A and B Header A Header B Insert the required input cards between the headers as shown in the following two diagrams ensuring that the connectors are correctly aligned with the headers on the input cards Input Card 1 2 Installation Side View ...

Page 23: ... card are installed via the use of headers C and header E Header C Header E Insert the required input card or output option card between the headers as shown in the following two diagrams ensuring that the connectors are correctly aligned with the headers on the cards Input Card 3 Output Card Installation Side View ...

Page 24: ...ration Guide Installation Input Card 3 Output Option Card Installation Top View To install the cards and headers into the controller first remove the terminal cover Then remove the two revealed screws at the bottom of the case ...

Page 25: ...he O rings which may come off when removing the screws The headers with the cards attached must then be inserted into the controller s main board connectors Match the header s name with corresponding text on the board as shown in the following figure Care must be taken to align the header board with the dotted outline on the main board ...

Page 26: ...rd Next reassemble the controller case ensuring all of the O rings are in place on the back of the case and all of the screws are re inserted Connect the power see Supply Voltage Connections section and check that all of the new cards have been recognised by the controller Now consult the appropriate wiring section for details of how to connect the sensors and outputs ...

Page 27: ...re provided for this purpose Note that fasteners are not provided MTD75 Overall Dimensions LTH Recommends using No 10 x 1 inch round head screws or similar for mounting Ensure top screw head is 8mm proud Care must be taken when fitting the unit on uneven walls or surfaces Do not over stress the mounting lugs Over tightening the mounting screws could also break the lugs Drill Hole Dimensions ...

Page 28: ...unting kit is designed for fixing to a vertical or horizontal handrail or pipe of 25 70 mm outside diameter Optional LTH Part No 7599 The controller is then clamped using the mounting kit as follows Note Care should be taken not to over tighten mounting as damage may result to enclosure ...

Page 29: ...Installation MTD75 Operation Guide 27 Installation Horizontal Mounting Vertical Mounting ...

Page 30: ...Installation 28 MTD75 Operation Guide Installation Blank ...

Page 31: ...75 terminal label The cables should be fed through the cable glands After each cable has been attached pull most of the cable slack back through the cable gland to prevent any unwanted RF energy from being radiated inside the housing Make sure not to strain the cable within the controller Tighten the cable gland onto the cable so that it grips sufficiently to seal and to prevent the cable from bei...

Page 32: ...t to the power supply terminals for the input voltage limits Exceeding these limits may damage the controller 85 265V AC Power Connections NB The Live and Neutral terminals are internally linked to the L N terminals of the relay terminal blocks The user should therefore ensure that the pumps solenoids attached to the relay terminals are compatible with the incoming power source The controller is f...

Page 33: ...ally open volts free contacts and are isolated from the rest of the controller The contacts are rated at 250VAC 30VDC 5A In addition to the two relay contacts the terminals for each of the pumps or solenoids provide connections to the Live and Neutral lines The Live terminals are fused via the front panel fuses at 2A see diagram below Controller Biocide A Biocide B Inhibitor Bleed pH Front Panel F...

Page 34: ...rminals For pumps with separate power and activation connections For pumps with only power connections Alarm Relay The alarm relay contacts are normally open volt free contacts and are isolated form the rest of the instrument The contacts are rated at 250VAC 30VDC 5A The Alarm relay can be triggered from a user selectable source See page 97 ...

Page 35: ...erminate into a load resistance not exceeding 750 For best noise immunity use a screened twisted pair cable with the screen connected to Earth at one end Use a sufficiently large cable to avoid a high resistance in the overall current loop MTD75 Current Output Connection Detail N B Available Current Outputs Varies Depending Upon Instrument Configuration ...

Page 36: ...ce are in contact with the sample Avoid points where air can be trapped Avoid points of high turbulence as air bubbles will affect the measurement If the sample has solids present then use a guard or filter to protect the glass electrode The glass electrode contains a liquid ensure that the probe is mounted so that the internal filling solution is in contact with the glass bulb When a new redox el...

Page 37: ...ent and warm water by gently scrubbing with a soft tooth brush or wet tissue Follow this by thoroughly rinsing the electrode in deionised water or clean tap water Inorganic Scale Deposits Dissolve the deposit by immersing the electrode bulb only in a solution of dilute 10 Hydrochloric Acid for a few minutes Follow the supplier s data sheet when handling acids and dispose of as instructed by your l...

Page 38: ...Connections 36 MTD75 Operation Guide Connections Redox Input Termination Information Redox LN10 Coax Cable Connection Details DynaProbe ProcessProbe Cable Connection Details ...

Page 39: ...e MTD75 also provides a differential input method of wiring the redox electrode This provides better electrical noise immunity and allows the sensor to operate in solutions where flowing electrical currents may cause measurement problems pH Redox LN10 Coax Cable Connection Details with Separate Solution Ground Connection ...

Page 40: ...Connections 38 MTD75 Operation Guide Connections DynaProbe ProcessProbe Cable Connection Details with Solution Ground pH 54E Extension Cable Connection Details with Solution Ground ...

Page 41: ...Connections MTD75 Operation Guide 39 Connections LTH 54E Extension Cable Connection Information S400 ProcessProbe to 54E Extension Cable Connection Details ...

Page 42: ...ion of electrodeless sensors in a variety of materials including PEEKTM a food grade material with excellent chemical resistance and high temperature performance Contact LTH Electronics or your local distributer for more information To ensure correct sensor mounting the following conditions should be observed The solution around the sensor is representative of the solution as a whole For best perf...

Page 43: ...ons ECS20 Series Sensor Installation Clearance Care should also be taken to ensure to position of the sensor within the flow is correct Ideally the probe head should be located in the centre of a T piece with the centre hole parallel with the flow ...

Page 44: ...ons 42 MTD75 Operation Guide Connections Electrodeless Conductivity Input Termination Information Electrodeless Conductivity 54H Cable Connection Details Electrodeless Conductivity 54E Cable Connection Details ...

Page 45: ...nto adjacent locations on the terminal block The preferred arrangement would be to have the positive signals as far apart from each other as the terminal block will allow with the negatives between them and the earth between the negative signals as shown in the following diagram Drive Drive Earth Return Return Recommended Extension Terminal Block Arrangement The following diagram details the conne...

Page 46: ...Connections 44 MTD75 Operation Guide Connections Electrodeless Conductivity 54E Extension Cable Connection Details ...

Page 47: ...inity of the sensor area of the probe A moderate flow is maintained to provide an up to date sample Excessive flow rates however can cause certain electrodes to rapidly deplete which will result in inaccurate readings In this case a sealed reference is recommended Ensure that both the glass electrode and reference are in contact with the sample Avoid points where air can be trapped Avoid points of...

Page 48: ...pproximately every 6 months Depending on the issue the following glass body pH electrode maintenance procedures can be carried out Initial Cleaning Wash the electrode with a solution of liquid detergent and warm water by gently scrubbing with a soft tooth brush or wet tissue Follow this by thoroughly rinsing the electrode in deionised water or clean tap water Inorganic Scale Deposits Dissolve the ...

Page 49: ...Connections MTD75 Operation Guide 47 Connections pH Input Termination Information pH LN10 Coax Cable Connection Details DynaProbe ProcessProbe Cable Connection Details ...

Page 50: ...he MTD75 also provides a differential input method of wiring the pH electrode This provides better electrical noise immunity and allows the sensor to operate in solutions where flowing electrical currents may cause measurement problems pH LN10 Coax Cable Connection Details with Separate Solution Ground Connection ...

Page 51: ...Connections MTD75 Operation Guide 49 Connections DynaProbe ProcessProbe Cable Connection Details with Solution Ground VP6 Detachable Cable Connection Details with Solution Ground ...

Page 52: ...Connections 50 MTD75 Operation Guide Connections pH 54E Extension Cable Connection Details with Solution Ground ...

Page 53: ...ons MTD75 Operation Guide 51 Connections LTH 54E Extension Cable Connection Information S400 ProcessProbe to 54E Extension Cable Connection Details VP6 Detachable Cable to 54E Extension Cable Connection Details ...

Page 54: ...or the water meter can be set in the Configuration menu see page 151 Flow Switch Input Digital Input 2 The terminal marked 2 is provided for connection to a flow switch in the process loop to indicate when there is no water flow past the sensors When activated this will flag an error message on the main display and inhibit any dosing or bleed relays The polarity of this input NO NC can be set in t...

Page 55: ...oop Resistance 100Ω km Signal damping Max 9 dB over the entire cable cross section Shielding Copper braided shielding or braided shielding and foil shielding Note the following when designing the bus structure Using cable type A and with a transmission rate of 9600 Baud the maximum line length segment length of the MODBUS RS485 system is 10000 meters The total length of the spurs may not exceed a ...

Page 56: ... Menu section The card can be removed whilst the instrument is on but only when the disk icon is not shown at the top of the display To insert the card ensure that the corner notch is at the top right of the card and then just push it all the way in to the socket To remove the card push it up then release and the card should then come out of the socket N B When removing it may be required to pull ...

Page 57: ...creen the user is viewing The button function is indicated by the control section at the bottom of the display Also present are six Relay Status LEDs that when illuminated indicate which relay is active Located between the relay LEDs there are two Alarm Status LEDs which provide clear indication of a fault within the instrument The Front Screens The MTD75 has two front screens each with the capabi...

Page 58: ...vation value dd mm yy hh mm Time of last activation Meter METER dd mm yy hh mm Time of last activation X Meter X METER dd mm yy hh mm Time of last activation A B Volume RATIO XX XXm3 Input water volume to next activation XX XXm3 Input water volume since last activation A B Time RATIO dd mm yy hh mm Time of next activation dd mm yy hh mm Time of last activation Water Meter Pulse Also shown on the f...

Page 59: ... and pressing the enter button The exit button is used to return to the previous menu or alternatively if held down for 3 seconds will take the instrument straight back to front screen 1 If no buttons are pressed after 2 minutes the instrument will default back to front screen 1 To the right of the menu screen arrows will indicate if there are further menu pages above or below the current one When...

Page 60: ...t will prompt them to enter the security code which will then change the instruments mode to unlocked Once unlocked the user can change any setting without having to re enter the security access code however the instrument will automatically lock itself if no further buttons are pressed after 2 minutes 30 seconds The default security access code is 1000 Select the option you wish to change and pre...

Page 61: ...n Menu From either of the front screens press the menu button to show the main menu options and select Access Code Management Select Option EXIT Return to Front Screen Enter Option Access Code Management Select change user access code Select Option EXIT Return to Main Menu Enter Option Enter Current Code The user is required to enter the existing security code before the new code can be entered In...

Page 62: ...able the security access system and permanently unlock the controller Increase Decrease Digit Select Next Digit EXIT Cancel Save Code New Code Confirmation Confirm the change of the security access code EXIT Cancel Confirm Change Change Confirmation The controller will then confirm that the security code has been successfully changed Exit ...

Page 63: ...nu item is set to Time the MTD75 will activate the Biocide A dose after the selected period The user must first select the overall period of the dosing cycle i e per week day hour From there the user can then select the interval of dosing When the Dose cycle Dose Per is set to Hour the user can then select the interval between doses to the minutes and seconds When the dose cycle is set to Day the ...

Page 64: ... the Bleed operation will be inhibited only for the duration of the Biocide A dose Only available if the Bleed relay has been enabled Pre Dose Bleeding The MTD75 provides the user with the option to define a short Bleed operation before initiating the Biocide A Dose this can be defined from 1 second to 99 minutes NB If a bleed inhibit occurs during a pre bleed operation the pre bleed will be termi...

Page 65: ... Control Functions Select Biocide A Select Option EXIT Return to Main Menu Enter Option Biocide A Trigger Source The user can select to initiate the Biocide A dose in a number of ways by selecting the appropriate trigger condition Selecting Off from the Source menu item can permanently deactivate the Biocide A relay output Redox will only be shown if an optional redox card has been fitted and enab...

Page 66: ...age appears then an associated digital input is currently controlling the on line off line state of the relay Select Option EXIT Cancel Save Selection Setpoint The redox setpoint value below which the Biocide A relay will energise Only available when source is set to Redox Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Dose After The volume of water required to pass before the Bi...

Page 67: ...ction Dose Per Select the Dose cycle when the trigger source is Time or when a background Timed Dose has been selected Select Option EXIT Cancel Save Selection Dose Every Select the dose period When Hour is selected this can be set to minutes and seconds when Day is selected this can be set to hours and minutes Increase Decrease Digit Select Next Digit EXIT Cancel Save Value ...

Page 68: ...o dose on Select Option EXIT Cancel Save Selection What time of day on the selected day to dose Increase Decrease Digit Select Next Digit EXIT Cancel Save Value And the duration of the dose Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Dose Duration Set the dose duration when using volume or timed dosing Select Option EXIT Cancel Save Selection ...

Page 69: ...ut mode is set to Pulse or the trigger source is set to either Meter or X Meter Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Cycle Time Set the sum of the On and Off times when the output mode is set to Time Proportional Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Time Proportional Band Set the proportional band when the output mode is set to Time Proportio...

Page 70: ...n causes the dose alarm to activate Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Bleed Inhibit Inhibit any Bleed operations until after the set bleed inhibit time Only available if the bleed relay is enabled Select Option EXIT Cancel Save Selection Bleed Inhibit Time Duration of the bleed inhibit after completion of dosing 00 00 indicates bleed inhibit only during dosing Increa...

Page 71: ...n Pre Bleed Time Set the duration of the pre dose bleed operation Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Manual Dose Duration Set the dose duration of the manual dose Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Manual Dose Start the manual dose Note once started the user can cancel the manual dose by selecting stop EXIT Cancel Select Option ...

Page 72: ...Biocide A 70 MTD75 Operation Guide Biocide A BLANK ...

Page 73: ...urce menu item can permanently deactivate the Biocide B relay output The Biocide B relay behaves identically to the Biocide A relay apart from the addition of dosing by ratio A B and the inability to select Redox as the trigger source Dosing By Ratio A B The Biocide B relay can be activated by linking it by ratio to Biocide A i e if the Ratio is set to say 3 1 Biocide B will replace Biocide A on e...

Page 74: ...Biocide B 72 MTD75 Operation Guide Biocide B BLANK ...

Page 75: ...e of day and the duration can be set different for each day of the week If the trigger source is Volume then the controller also offers a background Timed Bleed When enabled the timed bleeding menus will also appear working the same way except when the cycle is set to Week When this occurs the user will be able to select an interval from 1 to 6 days Bleeding By Conductivity Level If and optional e...

Page 76: ...tions Select Bleed Select Option EXIT Return to Main Menu Enter Option Bleed Trigger Source The user can select to initiate the Bleed operation in a number of ways by selecting the appropriate trigger condition Selecting Off from the Source menu item can permanently deactivate the Bleed relay output Elec Cond will only be shown if an optional Electrodeless Conductivity card has been fitted and ena...

Page 77: ...ars then an associated digital input is currently controlling the on line off line state of the relay Select Option EXIT Cancel Save Selection Setpoint The conductivity setpoint value below which the Bleed relay will energise Only available when source is set to Elec Cond Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Bleed After The volume of water required to pass before the Bl...

Page 78: ... Bleed Per Select the Bleed cycle when the trigger source is Time or when a background Timed Bleed has been selected Select Option EXIT Cancel Save Selection Bleed Every Select the bleed period When Hour is selected this can be set to minutes and seconds when Day is selected this can be set to hours and minutes Increase Decrease Digit Select Next Digit EXIT Cancel Save Value ...

Page 79: ...d on Select Option EXIT Cancel Save Selection What time of day on the selected day to bleed Increase Decrease Digit Select Next Digit EXIT Cancel Save Value And the duration of the bleed Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Bleed Duration Set the bleed duration when using volume or timed bleeding Select Option EXIT Cancel Save Selection ...

Page 80: ...the time which if the Bleed relay is active for longer than causes the bleed alarm to activate Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Manual Bleed Duration Set the bleed duration of the manual bleed Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Manual Bleed Start the manual bleed Note once started the user can cancel the manual bleed by selecting stop E...

Page 81: ...the Dose cycle is set to Week the user can select which days of the week the dose occurs on the time of day that dose occurs and its duration Both the time of day and the duration can be set different for each day of the week If the trigger source is Volume then the controller also offers a background Timed Dose When enabled the timed dosing menus will also appear working the same way except when ...

Page 82: ... inhibit occurs during a pre bleed operation the pre bleed will be terminated and the Inhibitor dose initiated immediately Only available if the Bleed relay has been enabled Manual Dosing To provide some flexibility in setting up and adjusting the dosing the MTD75 is provided with a Manual Dosing option Selecting the Manual Dose Start option will activate the relay for the time set in the manual d...

Page 83: ...ff line causes the Inhibitor relay to de energise Useful for when commissioning or calibrating the instrument When the unit is placed in an off line state off line will appear in the relay s message section on the front screen If a Cannot Edit Digital Input Has Control message appears then an associated digital input is currently controlling the on line off line state of the relay Select Option EX...

Page 84: ...ckground timed dose Only available when source is set to volume Select Option EXIT Cancel Save Selection Dose Per Select the Dose cycle when the trigger source is Time or when a background Timed Dose has been selected Select Option EXIT Cancel Save Selection Dose Every Select the dose period When Hour is selected this can be set to minutes and seconds when Day is selected this can be set to hours ...

Page 85: ...lect Option EXIT Cancel Save Selection What time of day on the selected day to dose Increase Decrease Digit Select Next Digit EXIT Cancel Save Value And the duration of the dose Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Dose Duration Set the dose duration when using volume or timed dosing Increase Decrease Digit Select Next Digit EXIT Cancel Save Value ...

Page 86: ...er Meter or X Meter Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Bleed Inhibit Inhibit any Bleed operations until after the set bleed inhibit time Only available if the bleed relay is enabled Select Option EXIT Cancel Save Selection Bleed Inhibit Time Duration of the bleed inhibit after completion of dosing 00 00 indicates bleed inhibit only during dosing Increase Decrease Digi...

Page 87: ...n Pre Bleed Time Set the duration of the pre dose bleed operation Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Manual Dose Duration Set the dose duration of the manual dose Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Manual Dose Start the manual dose Note once started the user can cancel the manual dose by selecting stop EXIT Cancel Select Option ...

Page 88: ...Inhibitor 86 MTD75 Operation Guide Inhibitor BLANK ...

Page 89: ...Hour the user can then select the interval between doses to the minutes and seconds When the dose cycle is set to Day the interval can be set to the hours and minutes When the Dose cycle is set to Week the user can select which days of the week the dose occurs on the time of day that dose occurs and its duration Both the time of day and the duration can be set different for each day of the week If...

Page 90: ... to 00 00 the Bleed operation will be inhibited only for the duration of the pH Control dose Only available if the Bleed relay has been enabled Pre Dose Bleeding The MTD75 provides the user with the option to define a short Bleed operation before initiating the pH Control Dose this can be defined from 1 second to 99 minutes NB If a bleed inhibit occurs during a pre bleed operation the pre bleed wi...

Page 91: ...nd Control Functions Select pH Control Select Option EXIT Return to Main Menu Enter Option pH Control Trigger Source The user can select to initiate the pH dose in a number of ways by selecting the appropriate trigger condition Selecting Off from the Source menu item can permanently deactivate the pH Control relay output pH Control will only be shown if an optional pH card has been fitted and enab...

Page 92: ...reen If a Cannot Edit Digital Input Has Control message appears then an associated digital input is currently controlling the on line off line state of the relay Select Option EXIT Cancel Save Selection Setpoint The pH setpoint value Only available when source is set to pH Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Trigger Set whether the relay activates above or below the se...

Page 93: ...background timed dose Only available when source is set to volume Select Option EXIT Cancel Save Selection Dose Per Select the Dose cycle when the trigger source is Time or when a background Timed Dose has been selected Select Option EXIT Cancel Save Selection Dose Every Select the dose period When Hour is selected this can be set to minutes and seconds when Day is selected this can be set to hour...

Page 94: ...elect Option EXIT Cancel Save Selection What time of day on the selected day to dose Increase Decrease Digit Select Next Digit EXIT Cancel Save Value And the duration of the dose Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Dose Duration Set the dose duration when using volume or timed dosing Increase Decrease Digit Select Next Digit EXIT Cancel Save Value ...

Page 95: ...mode is set to Pulse or the trigger source is set to either Meter or X Meter Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Cycle Time Set the sum of the On and Off times when the output mode is set to Time Proportional Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Time Proportional Band Set the proportional band when the output mode is set to Time Proportional...

Page 96: ... causes the dose alarm to activate Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Bleed Inhibit Inhibit any Bleed operations until after the set bleed inhibit time Only available if the bleed relay is enabled Select Option EXIT Cancel Save Selection Bleed Inhibit Time Duration of the bleed inhibit after completion of dosing 00 00 indicates bleed inhibit only during dosing Increas...

Page 97: ...on Pre Bleed Time Set the duration of the pre dose bleed operation Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Manual Dose Duration Set the dose duration of the manual dose Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Manual Dose Start the manual dose Note once started the user can cancel the manual dose by selecting stop EXIT Cancel Select Option ...

Page 98: ...pH Control 96 MTD75 Operation Guide pH Control BLANK ...

Page 99: ... e Flow Switch When the flow switch input is detected See page 52 f Tank Alarm When the tank alarm input is detected See page 52 g Any Error When any error condition is detected Main Menu From either of the front screen press the menu button to show the main menu options and select Dosing and Control Functions Select Option EXIT Return to Front Screen Enter Option Dosing and Control Functions Sele...

Page 100: ...Alarm Relay 98 MTD75 Operation Guide Alarm Relay BLANK ...

Page 101: ...ton to show the main menu options and select Sensors Select Option EXIT Return to Front Screen Enter Option Sensors Setup Select Redox ORP Redox ORP will only appear if the Redox card is installed See page 19 Select Option EXIT Return to Main Menu Enter Option Sensor Enabled Enables the redox sensor interface If the user has a redox card installed but is not using it setting this to No will clear ...

Page 102: ...line will appear in the messages section on the front screen If a Cannot Edit Digital Input Has Control message appears then an associated digital input is currently controlling the on line off line state of the channel Select Option EXIT Cancel Save Selection Input Filtering Averaging When very noisy environments are encountered this function will allow the user to filter the sensor readings by t...

Page 103: ...ions and select Sensors Select Option EXIT Return to Front Screen Enter Option Sensors Setup Select Electrodeless Conductivity Electrodeless Conductivity will only appear if the Electrodeless Conductivity card is installed See page 19 Select Option EXIT Return to Main Menu Enter Option Sensor Enabled Enables the electrodeless conductivity sensor interface If the user has an electrodeless conductiv...

Page 104: ... on line off line state of the channel Select Option EXIT Cancel Save Selection Units The reading can be set to be displayed in either in Siemens cm or TDS Total Dissolved Solids in ppm Select Option EXIT Cancel Save Selection Sensor Type The electrodeless conductivity input can use either the ECS20 or all of the ECS40 series sensors Selecting the appropriate sensor will configure the instrument w...

Page 105: ...g a factor which can be adjusted between 0 50 and 0 90 Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Temperature Input Sensor Select the electrodeless conductivity input temperature sensor type for use with the sensor measurement s automatic temperature compensation If a temperature sensor is not connected to the input then this menu item should be set to disabled else temperatu...

Page 106: ...election Temperature Compensation Mode To use temperature compensation from a measured input select Auto else select Manual to enable a fixed value entry Only Available if Temperature Compensation is set to in Select Option EXIT Cancel Save Selection Manual Temperature Input The fixed temperature value used for manual temperature compensation Only available when temperature compensation mode is se...

Page 107: ...re Compensation Slope Sets the temperature compensation slope See Appendix C Temperature Coefficient for more information Only Available if Temperature Compensation is set to in Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Input Filtering Averaging When very noisy environments are encountered this function will allow the user to filter the sensor readings by taking a running av...

Page 108: ...Electrodeless Conductivity Setup 106 MTD75 Operation Guide ECS Setup BLANK ...

Page 109: ... the menu button to show the main menu options and select Sensors Select Option EXIT Return to Front Screen Enter Option Sensors Setup Select pH pH will only appear if the pH card is installed See page 19 Select Option EXIT Return to Main Menu Enter Option Sensor Enabled Enables the pH sensor interface If the user has a pH installed but is not using it setting this to No will clear any pH sensor e...

Page 110: ...rs then an associated digital input is currently controlling the on line off line state of the channel Select Option EXIT Cancel Save Selection Temperature Input Sensor Select the pH input temperature sensor type for use with the sensor measurement s automatic temperature compensation If a temperature sensor is not connected to the input then this menu item should be set to disabled else temperatu...

Page 111: ...The fixed temperature value used for manual temperature compensation Only available when temperature compensation mode is set to manual Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Input Filtering Averaging When very noisy environments are encountered this function will allow the user to filter the sensor readings by taking a running average over the time period selected from 1...

Page 112: ...pH Input Setup 110 MTD75 Operation Guide pH Setup BLANK ...

Page 113: ...ever the operator must ensure the relays are in a safe state when using this feature Redox Standards Unlike pH electrodes the redox electrode s slope does not change Nevertheless incorrect redox potentials may be occasionally measured and the cause of these errors is usually a contaminated platinum Pt surface or a contaminated or plugged reference junction Calibration of an Redox Electrode is a si...

Page 114: ... off line state off line will appear in the channel messages section on the front screen If a Cannot Edit Digital Input Has Control message appears then an associated digital input is currently controlling the on line off line state of the channel Select Option EXIT Cancel Save Selection Redox Offset Calibration The Redox Offset calibration enables the user to adjust the sensor reading to match a ...

Page 115: ...ion Calibration History The calibration history page provides a record of all Offset calibrations carried out The data includes the date and time of the calibration and the calculated Offset Move To Next Page Up or Down EXIT Return To Calibration Menu CLEAR Clear All of the Calibration History Front Screen Calibration Access Enable When enabled front calibration access allows direct entry into the...

Page 116: ... Option EXIT Cancel Enter Menu Calibration Reminder By enabling the calibration reminder the user can configure a calibration interval which when expired will activate an alarm and channel message on the front screen If the interval has expired and the alarm has activated then on the completion of a successful sensor calibration the next cal date will be automatically incremented by calibration in...

Page 117: ...it EXIT Cancel Save Value Next Calibration Date Sets the exact date of the next calibration alarm The Calibration Interval will update to show the number of days to the next calibration date Increase Decrease Digit or Text Select Next Item EXIT Cancel Save Entry Defer Calibration Date Turns off the alarm and increases the calibration interval by an extra 7 days Only appears once the calibration in...

Page 118: ...Redox Calibration 116 MTD75 Operation Guide Redox Calibration BLANK ...

Page 119: ...e possibility of contamination of the standard solution The advantage of this calibration method is that the sensor and cable are an integral part of the calibration LTH strongly recommends a lower limit of 500μS cm for this type of calibration Conductivity is a very sensitive measurement and even trace contamination of the standard solution will be detected for example exposing the solution to ai...

Page 120: ...tion Calibration Select Electrodeless Conductivity Electrodeless Conductivity will only appear if the Electrodeless Conductivity card is installed See page 19 Select Option EXIT Return to Main Menu Enter Option Mode Selecting off line causes any setpoints associated with this channel to de energise Also causes any current outputs associated to hold their current value useful for when commissioning...

Page 121: ...lect Next Digit EXIT Cancel Save Value Calibrate Sensor Sensor loop calibration Must be carried out when a sensor or sensor cable is changed See page 123 for more details Enter Sensor Calibration Sensor Solution Calibration The sensor solution calibration enables the user to adjust the sensor reading to match a known input The current sensor reading can be seen in the pop up window and is adjusted...

Page 122: ... the sensor reading has had to be decreased to match the known input Temperature Offset Calibration The temperature offset calibration enables the user to adjust the temperature reading to match a known input The current temperature reading can be seen in the pop up window and is adjusted by pressing the up and down arrows When the reading is correct press the enter button to store the calibration...

Page 123: ...emperature compensation reading at the time Move To Next Page Up or Down EXIT Return To Calibration Menu CLEAR Clear All of the Calibration History Front Screen Calibration Access Enable When enabled front calibration access allows direct entry into the calibration menu from the front screen It also disables the security access system within the calibration menu enabling the calibration functions ...

Page 124: ...gure a calibration interval which when expired will activate an alarm and channel message on the front screen At the end a sensor solution calibration if the calibration reminder is enabled the user will be prompted to update the cal due date by the calibration interval and so clearing an alarm if active Select Option EXIT Cancel Save Selection Calibration Interval Sets the interval time for the c...

Page 125: ...ase Interval NO Cancel Sensor Loop Calibration The sensor calibration is a one off configuration calibration to allow for losses due to cable length and sensor output variations It must be completed when either a sensor or sensor cable is changed To complete the calibration the Blue loop resistor supplied with the input card must be used once completed do not discard the resistor as it will be req...

Page 126: ...rect press the prev button then the enter button to restart the calibration PREV Exit Calibration Without Saving SKIP Skip to Next Calibration Point EXIT Exit Calibration Without Saving Initiate Calibration ECS20 Series Sensor ECS40 Series Sensor Loop Resistor Path Zero Calibration Remove the loop resistor and ensure that the sensor head is located in free air then press the enter button Note this...

Page 127: ...nt then calculates the Offset and Slope for the electrode In order for the auto calibration to work correctly the buffer temperature must either be measured by the instrument during calibration or if manual temperature compensation is being used the buffer temperature must be entered in the Calibration Manual Temperature Input in the calibration menu Manual In Manual calibration mode it is possibl...

Page 128: ...ion Calibration Select pH pH will only appear if the pH card is installed See page 19 Select Option EXIT Return to Main Menu Enter Option Mode Selecting off line causes any setpoints associated with this channel to de energise Also causes any current outputs associated to hold their current value useful for when commissioning or calibrating the instrument When the unit is placed in an off line sta...

Page 129: ...Selection Calibration Manual Temperature Input This setting allows a different fixed temperature value to be used when calibrating Makes it easier to calibrate a standard solution at a different temperature to the process Only available when the compensation mode has been set to manual in the sensor setup menu Increase Decrease Digit Select Next Digit EXIT Cancel Save Value pH Calibration Enter th...

Page 130: ...ly being used by the instrument Cannot be edited Changed by either using the pH manual offset calibration or by the pH auto calibration pH Slope Calibration Enter the pH Manual Slope Calibration Routine Only available when the calibration principle is set to Manual in this menu See page 135 for more details Select Option EXIT Return to Select Calibration Channel Enter pH Manual Slope Calibration S...

Page 131: ...ture offset value currently being used The value will change depending on the result of the temperature offset calibration Cannot be edited Enter Calibration History The MTD75 series has a calibration history feature which allows the user to review the record of sensor solution calibrations To enter the calibration history menu press enter Enter Calibration History Calibration History The calibrat...

Page 132: ...on access allows direct entry into the calibration menu from the front screen It also disables the security access system within the calibration menu enabling the calibration functions without having to enter the security access code Select Option EXIT Cancel Save Selection Front Screen Calibration Access When the calibration access is enabled press the CAL button to bring up pop up to select whic...

Page 133: ...sensor calibration before the calibration interval has expired then the instrument will ask the user whether they wish to update the next cal due date by the calibration interval Select Option EXIT Cancel Save Selection Calibration Interval Sets the interval time for the calibration alarm The Next Cal Date will update to show the date of the next calibration alarm Increase Decrease Digit Select Ne...

Page 134: ...ustom buffer menu allows the user to enter in alternative custom buffer solution values at fixed temperatures for use with the pH automatic calibration function Number of Points Define the required number of data points to be entered Maximum 13 Setup Points Automatically define the data points one after another It is recommended that the points are added in ascending order of temperature Data Poin...

Page 135: ...e alternative buffers then they must enter in their own buffer values at different temperatures by following the custom buffer instructions on page 132 In order for the auto calibration to work correctly the buffer temperature must either be measured by the instrument during calibration or if manual temperature compensation is being used the buffer temperature must be entered in the Calibration Ma...

Page 136: ...onnected correctly and that the correct buffer has been used Then press Retry to repeat the calibration PREV Go to Previous Calibration Point SKIP Skip to Next Calibration Point EXIT Exit Calibration Without Saving Initiate Calibration Place Electrode In 9pH Buffer Place the electrode in the 9pH buffer and press enter to begin sampling If the calibration has been completed successfully the instrum...

Page 137: ...employed Alternatively any automatic temperature compensation element should be placed in the buffer solution with the pH sensor if Auto TC is being used Calibration Principle The default method of calibration is Manual mode however if the probe is pH and the type is glass then Auto mode may have been selected If this is the case then calibration principle will need to be set to manual Select Opti...

Page 138: ...o adjust the sensor slope until the displayed reading matches the known input To activate the function select pH Slope Calibration and press enter The current sensor reading can be seen in the pop up window and is adjusted by pressing the up and down arrows When the reading is correct press the enter button to store the calibration The slope limits are 80 to 110 Adjust the Reading Up or Down EXIT ...

Page 139: ...ture C LTH 4pH Buffer LTH 7pH Buffer LTH 9pH Buffer 10 4 00 7 07 9 21 15 4 00 7 04 9 14 20 4 00 7 02 9 06 25 4 00 7 00 9 00 30 4 01 6 99 8 96 35 4 02 6 98 8 92 40 4 03 6 97 8 88 50 4 05 6 96 8 83 60 4 08 6 96 8 81 LTH Buffer Solutions Ordering Information Type No Part No Description SB 052 1610 138 199 4pH Buffer standard colour coded Red 500ml SB 168 1610 138 200 7pH Buffer standard colour coded ...

Page 140: ...pH Calibration 138 MTD75 Operation Guide pH Calibration BLANK ...

Page 141: ...Calibration Select Option EXIT Return to Front Screen Enter Option Calibration Select Reset User Calibration Select Option EXIT Return to Main Menu Enter Option Reset User Calibration Select sensor input Select Option EXIT Return to Calibration Enter Option Reset User Calibration Select whether to reset the sensor calibration the temperature calibration or reset all of the sensor s user calibratio...

Page 142: ...Calibration Reset 140 MTD75 Operation Guide Calibration Reset BLANK ...

Page 143: ...n to show the main menu options and select 4 20mA Outputs Select Option EXIT Return to Front Screen Enter Option Outputs Setup Select the Current Output you wish to edit Select Option EXIT Return to Main Menu Enter Option Input Source The sensor the current output is to be associated with The sensors shown depend on the configuration of the controller and whether the sensor has been enabled in the...

Page 144: ...Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Span 20mA Enter the desired sensor value to be represented by 20mA An inverse relationship can be achieved by setting the Span less than the Zero If the sensor reading falls outside this and the zero value an error alarm will be activated Increase Decrease Digit Select Next Digit EXIT Cancel Save Value On Error The current outputs ca...

Page 145: ... monitor the current output signal Main Menu From the front screen press the menu button to show the main menu options and select Calibration Select Option EXIT Return to Front Screen Enter Option Calibration Select 4 20mA Outputs Select Option EXIT Return to Main Menu Enter Option Calibrate 4 20mA Outputs Select the current output you wish to calibrate Select Option EXIT Return to Calibration Ent...

Page 146: ...he current output cannot go below 0mA Adjust Output EXIT Cancel Save Adjustment Adjust 4mA Output Using the and buttons adjust the current output until it reads the desired value on your current meter Adjust Output EXIT Cancel Save Adjustment Adjust 20mA Output Using the and buttons adjust the current output until it reads the desired value on your current meter Adjust Output EXIT Cancel Save Adju...

Page 147: ...n menu options and select Calibration Select Option EXIT Return to Front Screen Enter Option Calibration Select Reset User Calibration Select Option EXIT Return to Main Menu Enter Option Reset User Calibration Select Reset 4 20mA Outputs Select Option EXIT Return to Calibration Enter Option 4 20mA Outputs Reset Select the required 4 20mA Output to Reset its user calibration back to factory setting...

Page 148: ...Current Outputs 146 MTD75 Operation Guide Current Outputs BLANK ...

Page 149: ... indicate when there is no water flow past the sensors When activated this will flag an error message on the main display and inhibit any dosing which is using a sensor input as its trigger source The polarity of this input NO NC can be set in the digital input 2 menu Digital Inputs 3 5 Digital inputs 3 5 provide a user configured system to set the associated relay to either Offline or Interlock i...

Page 150: ... Cancel Save Selection Function The digital input can be configured to operate in the following ways Digital Input 1 Only Water Meter Digital Input 2 Only Flow Switch Digital Inputs 3 4 5 Only Off Line Interlock Tank Level Remote Dose Select Option EXIT Cancel Save Selection Polarity Configure whether the digital input activates on the closing of the circuit normally open or the opening of the cir...

Page 151: ...se functions the user can no longer take the associated relay offline using the menu item in the setup menu As indicated by the Cannot Edit Digital Input Has Control message In addition to de energising the relay the user can also define the operation of any current outputs associated with the sensor the relay is currently using Select Option EXIT Cancel Save Selection Remote Dose If selected enab...

Page 152: ...Digital Inputs 150 MTD75 Operation Guide Digital Inputs BLANK ...

Page 153: ...the internal battery backed clock WARNING Changing the time or day can lead to missed doses or immediate dosing where Time is defined as the trigger source If this may lead to problems make sure to alter the time day when no relay outputs will be affected If a date day of week change is made use the Manual Dosing option on those relays that are triggered by time to ensure correct time date correla...

Page 154: ...he controller to automatically adjust it s time for when daylight savings starts and ends The start and end times may be adjusted to allow for local differences Select Option EXIT Cancel Save Selection K Factor Set the K factor for the water meter input Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Total Water The total amount of water the controller has measured ...

Page 155: ... the timer to 00 00 will disable the alarm Increase Decrease Digit Select Next Digit EXIT Cancel Save Value If the time between incoming pulses is greater than the set time the unit will activate the alarm The controller will display a warning message on the main display when the timer expires The water meter alarm can be cancelled by pressing the ACK button on the front screen and selecting Water...

Page 156: ...guration Menu Enter Option Setup Service Alarm Service alarm configuration Service Due Date Update Automatically increment the next service date by the service interval Requires service security code prior to use Service Reminder Turn the service alarm on or off Requires service security code prior to use Service Interval Set the Service Interval Requires service security code prior to use Next Se...

Page 157: ...Contrast EXIT Cancel Save Contrast Software Status Provides information about the software version and serial numbers of the controller Select Option EXIT Return to Main Menu Enter Option EXIT Return to Configuration Menu Format SD Card Allows the users to reformat SD cards which are incompatible with the controller For cards which are greater than 4GB this may take several minutes Select Option E...

Page 158: ...Configuration 156 MTD75 Operation Guide Configuration BLANK ...

Page 159: ... Software Select the update software option from within the configuration menu Select Option EXIT Return to Main Menu Enter Option Update Software Verify that the new software is of a higher version than the current one shown It is recommended that the entire unit is saved before the update is started See the Save Setup section for instructions Select start to continue Select Option EXIT Return to...

Page 160: ...Update Software 158 MTD75 Operation Guide Update Software BLANK ...

Page 161: ...ber of your controller along with the purchase order In return they will supply you with an 8 digit unlock code that is unique to the controller and the required function to be unlocked Unlocking Optional Software Functions Main Menu From the front screen press the menu button to show the main menu options and select Configuration Select Option EXIT Return to Front Screen Enter Option Software Sta...

Page 162: ...t Option EXIT Return to Main Menu Enter Option Unlock Software Select the optional software function you wish to unlock Select Option EXIT Return to Main Menu Enter Option Enter the required Unlock Code If the code is incorrect the user will be prompted to try again If the code is correct the function will now be unlocked Change Character Select Next Character EXIT Cancel Enter Code ...

Page 163: ...enu also features the ability to reset the whole controller s configuration back to the factory configuration Main Menu From the front screen press the menu button to show the main menu options and select Save Restore Select Option EXIT Return to Front Screen Enter Option Save Restore Menu Select the operation you wish to carry out Select Option EXIT Return to Main Menu Enter Option Select Locatio...

Page 164: ...Save Restore Reset 162 MTD75 Operation Guide Save Restore Reset BLANK ...

Page 165: ...g the help button a more detailed description of the error is shown along with suggested solutions to the possible causes of the error Error Menu Access The error menu can be accessed by either pressing the scroll left button whilst on Front Screen 1 Scroll Left To Error Menu Scroll Right Menu Access Main Menu Or by selecting the Errors option from the main menu Select Option EXIT Return to Front ...

Page 166: ...Error Messages 164 MTD75 Operation Guide Error Messages BLANK ...

Page 167: ...lues are transmitted in this data field Register start address from which the data is transmitted Number of registers Write read data Data length etc Checksum The telegram check sum forms the end of the telegram The master can send another telegram to the slave as soon as it has received an answer to the previous telegram or once the time out period set at the master has expired This time out peri...

Page 168: ...ameter in the controller Note Registers whose address space consume more than one register i e Floats cannot be set using this function code 16 Write Multiple Registers Writes several MTD75 registers with a new value A maximum of 120 consecutive registers can be written with a single telegram Application For configuring parameters in the controller 23 Read Write Multiple Registers Simultaneous rea...

Page 169: ...ng point numbers IEE 754 Data length 4 bytes 2 registers Byte 3 Byte 2 Byte 1 Byte 0 SEEEEEEE EMMMMMMM MMMMMMMM MMMMMMMM S Sign E Exponent M Mantissa INT Integer 16 bits Data length 2 bytes 1 register Byte 1 Byte 0 Most Significant Bit MSB Least Significant Bit LSB LONG Long Integer 32 bits Data length 4 bytes 2 registers Byte 3 Byte 2 Byte 1 Byte 0 Most Significant Bit MSB Least Significant Bit L...

Page 170: ...ration Select Option EXIT Return to Front Screen Enter Option Mode Set the Modbus communication mode format to either RTU or ASCII Select Option EXIT Cancel Save Selection Slave Address Set the save address used to address the controller Can be set from 1 to 247 Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Baud Rate Set the communication Baud rate Available options 300 600 1200...

Page 171: ...Modbus RS485 MTD75 Operation Guide 169 Modbus RS485 Parity Set the error parity bit Select Option EXIT Cancel Save Selection ...

Page 172: ...Modbus RS485 170 MTD75 Operation Guide Modbus RS485 BLANK ...

Page 173: ...n with each showing 2 readings these enable the user to instantly view the last 50 samples of each reading The live trend screen also features a review mode where by the user can further analyse the last 200 samples of each reading If the user finds something of note the software provides a facility to save those 200 readings to an excel compatible file on the SD card Further analysis is provided ...

Page 174: ...s shown depend on the configuration of the instrument Select Option EXIT Cancel Save Selection Trace Min Enter the Trace s minimum displayed value Adjust in conjunction with the maximum displayed value to increase the measurements displayed resolution Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Trace Max Enter Trace s maximum displayed value Adjust in conjunction with the mini...

Page 175: ...sociated with The options shown depend on the configuration of the instrument Then configure trace 2 s min and max as before with trace 1 Select Option EXIT Cancel Save Selection Trend Interval Enter the time interval between samples for both trace 1 and trace 2 Increase Decrease Digit Select Next Digit EXIT Cancel Save Value ...

Page 176: ...tions READ Current Reading MIN The minimum value of the last 200 readings MAX The maximum value of the last 200 readings AVG The average value of the last 200 readings LINE PAGE When in Review Mode toggles between the cursor moving a line at a time or at a page at a time VALUE Press to enter the live trend Review Mode Review mode allows the user to scroll back through the last 200 readings EXIT Wh...

Page 177: ...This data can then be viewed either inside the controller or removed and viewed in Microsoft Excel on a PC Setup SD Card Data Logging Main Menu From the front screen press the menu button to show the main menu options and select Data Logging Select Option EXIT Return to Front Screen Enter Option Data Logging Select Setup SD Card Data Logging Select Option EXIT Return to Main Menu Enter Option Log ...

Page 178: ...age Select Option EXIT Cancel Save Selection Data Logging Start Stop Shows the current status of the data logging Stopped Recording and allows the logging to be started and stopped When the data logging is active the SD card active symbol will be shown at the top of the screen Note If a large number of files are present on the SD card there may be a delay whilst the software is searching the card ...

Page 179: ...er Option Data Logging Select View SD Card Data Logging Select Option EXIT Return to Main Menu Enter Option Select Time Date Enter the time and date of the data to be viewed If the SD card contains no data at the selected time and date then the configure graph shows No Data Note If the SD card contains many files then there may be a delay whilst the card is searched Increase Decrease Digit Select ...

Page 180: ...nstrument Select Option EXIT Cancel Save Selection Trace Min Enter the Trace s minimum displayed value Adjust in conjunction with the maximum displayed value to increase the measurements displayed resolution Increase Decrease Digit Select Next Digit EXIT Cancel Save Value Trace Max Enter the Trace s maximum displayed value Adjust in conjunction with the minimum displayed value to increase the meas...

Page 181: ...e 2 right hand side axis is to be associated with The options shown depend on the configuration of the instrument Then configure trace 2 s min and max as before with trace 1 Select Option EXIT Cancel Save Selection View Graph View the configured graph Select Option EXIT Cancel Enter Option ...

Page 182: ...ling the user can turn on page mode where by the screen jumps a page at a time through the readings Where a break occurs in the trace you have reached the end of one file and the beginning of the next Note there may be a delay in scrolling when new data is loaded from the SD card LINE PAGE Toggles between the cursor moving a line at a time or at a page at a time EXIT Press to exit and return to Vi...

Page 183: ...ains the date and time of when it was created The data is stored as a comma separated variable CSV which can be read by Microsoft Excel The first column of data contains the date and time of each sample Note by default Excel hides the seconds value to display this you need to apply a custom format to the column as follows dd mm yyyy hh mm ss The proceeding columns contain Enabled Dosing and contro...

Page 184: ...Data Logging 182 MTD75 Operation Guide Data Logging BLANK ...

Page 185: ...pH Card Fitted pH Card Serial Number Output Option Card Fitted Output Option Serial Number Biocide A Source Mode Setpoint Dose After Timed Dose Dose Per Dose Every Dose Monday Dose Monday Time of Day Dose Monday Duration Dose Tuesday Dose Tuesday Time of Day Dose Tuesday Duration Dose Wednesday Dose Wednesday Time of Day Dose Wednesday Duration Dose Thursday Dose Thursday Time of Day Dose Thursday...

Page 186: ...nday Duration Dose Duration Output Mode Stroke Rate Cycle Time Time Proportional Band Dose Alarm Dose Alarm Time Bleed Inhibit Bleed Inhibit Time Pre Bleed Pre Bleed Time Manual Dose Duration Biocide B Source Mode Ratio A B Dose After Timed Dose Dose Per Dose Every Dose Monday Dose Monday Time of Day Dose Monday Duration Dose Tuesday Dose Tuesday Time of Day Dose Tuesday Duration Dose Wednesday ...

Page 187: ...ay Time of Day Dose Friday Duration Dose Saturday Dose Saturday Time of Day Dose Saturday Duration Dose Sunday Dose Sunday Time of Day Dose Sunday Duration Dose Duration Output Mode Stroke Rate Bleed Inhibit Bleed Inhibit Time Pre Bleed Pre Bleed Time Manual Dose Duration Bleed Source Mode Setpoint Bleed After Timed Bleed Bleed Per Bleed Every Bleed Monday Bleed Monday Time of Day Bleed Monday Dur...

Page 188: ...rsday Time of Day Bleed Thursday Duration Bleed Friday Bleed Friday Time of Day Bleed Friday Duration Bleed Saturday Bleed Saturday Time of Day Bleed Saturday Duration Bleed Sunday Bleed Sunday Time of Day Bleed Sunday Duration Bleed Duration Dose Alarm Dose Alarm Time Manual Dose Duration Inhibitor Source Mode Bleed Time Dose After Timed Dose Dose Per Dose Every Dose Monday Dose Monday Time of Da...

Page 189: ...ay Dose Thursday Time of Day Dose Thursday Duration Dose Friday Dose Friday Time of Day Dose Friday Duration Dose Saturday Dose Saturday Time of Day Dose Saturday Duration Dose Sunday Dose Sunday Time of Day Dose Sunday Duration Dose Duration Output Mode Stroke Rate Bleed Inhibit Bleed Inhibit Time Pre Bleed Pre Bleed Time Manual Dose Duration pH Control Source Mode Setpoint Trigger Dose After Tim...

Page 190: ...Day Dose Wednesday Duration Dose Thursday Dose Thursday Time of Day Dose Thursday Duration Dose Friday Dose Friday Time of Day Dose Friday Duration Dose Saturday Dose Saturday Time of Day Dose Saturday Duration Dose Sunday Dose Sunday Time of Day Dose Sunday Duration Dose Duration Output Mode Stroke Rate Cycle Time Time Proportional Band Dose Alarm Dose Alarm Time Bleed Inhibit Bleed Inhibit Time ...

Page 191: ...ensor Type Cell Constant TDS Factor Temperature Input Sensor Temperature Units Temperature Compensation Temperature Compensation Mode Manual Temperature Input Temperature Compensation Base Temperature Compensation Slope ECS Filter pH Input Enabled Mode Temperature Input Sensor Temperature Units Temperature Compensation Mode Manual Temperature Input pH Filter ...

Page 192: ...ess Conductivity Calibration Mode Calibration Manual Temp Slope Value Temperature Offset Front Cal Access Calibration Reminder Calibration Interval Next Calibration Date pH Calibration Mode Calibration Principle Calibration Manual Temp Offset Value Slope Value Temperature Offset Sensor Condition Front Cal Access Calibration Reminder Calibration Interval Next Calibration Date ...

Page 193: ...x A pH Calibration Custom Buffer No of Points Nominal Value Point Temperature Buffer Value Buffer Value 1 2 3 4 5 6 7 8 9 10 11 12 13 Current Output A Input Source Output Zero Span On Error Current Output B Input Source Output Zero Span On Error ...

Page 194: ...Current Output D Input Source Output Zero Span On Error Digital Input 1 Function Fixed Water Meter Polarity Digital Input 2 Function Fixed Flow Switch Polarity Digital Input 3 Relay Function Remote Dose Time Polarity 4 20mA OP Level Digital Input 4 Relay Function Remote Dose Time Polarity 4 20mA OP Level ...

Page 195: ...t Date DST Start Time DST End Date DST End Time K Factor Water Meter Timeout Redox Service Alarm Redox Service Alarm Interval Electrodeless Conductivity Service Alarm Electrodeless Conductivity Service Alarm Interval pH Service Alarm pH Service Alarm Interval Optional Software Functions Modbus RS485 Data Logging Modbus RS485 Mode Slave Address Baud Rate Parity ...

Page 196: ...ace 2 Trace 2 Min Trace 2 Max Trend Interval Live Trending 2 Configure Trend Trace 1 Trace 1 Min Trace 1 Max Trace 2 Trace 2 Min Trace 2 Max Trend Interval Live Trending 3 Configure Trend Trace 1 Trace 1 Min Trace 1 Max Trace 2 Trace 2 Min Trace 2 Max Trend Interval SD Card Data Logging Log Interval Loop Recording ...

Page 197: ...erature sensors that may be used with the MTD75 Not all options are available on all sensor types Temperature C PT1000 RTD PT100 RTD 0 1000 0 100 00 10 1039 0 103 90 20 1077 9 107 79 25 1097 3 109 73 30 1116 7 111 67 40 1155 4 115 54 50 1194 0 119 40 60 1232 4 123 24 70 1270 7 127 07 80 1308 9 130 89 90 1347 0 134 70 100 1385 0 138 50 ...

Page 198: ... conductivity readings Raise the solution temperature by at least 10 C and again record the temperature and conductivity readings Using the following equation the temperature compensation slope can be calculated in percentage terms Gx Gy x 100 Gy Tx 25 Gx Ty 25 base temperature 25 C Note If the base temperature is set to 20 C then replace 25 with 20 in the above equation Term Description Gx Conduc...

Page 199: ...osed 2001 Get Bio B Relay INT The state of the Biocide B relay 0 Relay Off 1 Relay On 2002 Get Bleed Relay INT The state of the Bleed relay 0 Relay Off 1 Relay On 2 Relay Over Dosed 4 Relay Delay 2003 Get Inhibitor Relay INT The state of the Inhibitor relay 0 Relay Off 1 Relay On 2004 Get pH Relay INT The state of the pH relay 0 Relay Off 1 Relay On 2 Relay Over Dosed 2005 Get Alarm Relay INT The ...

Page 200: ...c Meters 2032 Get Bio A Last Volume Float The volume of water measured since the last Biocide A Dose 0 to 99 99 Cubic Meters Biocide B Relay Last and Next Dose Information 2060 Get Bio B Next Dose Hrs INT The time of the Next Biocide B Dose Hour element 0 to 23 Hour 2061 Get Bio B Next Dose Mins INT The time of the next Biocide B Dose Minute element 0 to 59 Minute 2062 Get Bio B Next Dose Date INT...

Page 201: ...er measured since the last Bleed 0 to 99 99 Cubic Meters Inhibitor Relay Last and Next Dose Information 2140 Get Inh Next Dose Hrs INT The time of the Next Inhibitor Dose Hour element 0 to 23 Hour 2141 Get Inh Next Dose Mins INT The time of the next Inhibitor Dose Minute element 0 to 59 Minute 2142 Get Inh Next Dose Date INT The time of the next Inhibitor Dose Day of month element 0 to 31 Day of m...

Page 202: ... INT The time of the last pH Control Dose Month of Year element 0 to 12 Month of Year 2189 Get PH Last Dose Year INT The time of the last pH Control Dose Year element 0 to 3000 Year 2190 Get PH Next Volume Float The volume of water remaining till the next pH Control Dose 0 to 99 99 Cubic Meters 2192 Get PH Last Volume Float The volume of water measured since the last pH Control Dose 0 to 99 99 Cub...

Page 203: ...ter INT Generate pulse after the set counts of the water meter input 0 to 99 Pulses 2304 Get Set Bio A X Meter INT Generate set number of pulses at each water meter input 0 to 99 Pulses 2305 Get Set Bio A Timed Dose INT The status of the background timed dose enabled 1077 No 1076 Yes 2306 Get Set Bio A Dose Per INT Select the Dose cycle 1500 Hour 1501 Day 1502 Week 2307 Get Set Bio A Dose Min INT ...

Page 204: ...n INT If dosing on a Tuesday the time of day the dose occurs Minute element 0 to 59 Minute 2320 Get Set Bio A Tue Dur Min INT If dosing on a Tuesday the set dose duration Minutes element 0 to 99 Minutes 2321 Get Set Bio A Tue Dur Sec INT If dosing on a Tuesday the set dose duration Seconds element 0 to 59 Seconds 2322 Get Set Bio A Dose Wed INT If timed dosing per week does a Wednesday dose need t...

Page 205: ...Dur Sec INT If dosing on a Friday the set dose duration Seconds element 0 to 59 Seconds 2337 Get Set Bio A Dose Sat INT If timed dosing per week does a Saturday dose need to be carried out 1076 Yes 1077 No 2338 Get Set Bio A Sat Time Hour INT If dosing on a Saturday the time of day the dose occurs Hour element 0 to 23 Hour 2339 Get Set Bio A Sat Time Min INT If dosing on a Saturday the time of day...

Page 206: ...Get Set Bio A Cycle Sec INT The time proportional cycle time Seconds element 0 to 59 Seconds 2355 Get Set Bio A Prop Band INT The setpoint proportional band 0 to 999 Millivolts 2356 Get Set Bio A Dose Alarm INT The status of the dose alarm enable 1077 No 1076 Yes 2357 Get Set Bio A Dose Alm Hour INT Set the dose alarm time Hour element 0 to 23 Hour 2358 Get Set Bio A Dose Alm Min INT Set the dose ...

Page 207: ...tus of the background timed dose enabled 1077 No 1078 Yes 2406 Get Set Bio B Dose Per INT Select the Dose cycle 1500 Hour 1501 Day 1502 Week 2407 Get Set Bio B Dose Min INT Enter the dose cycle time Minutes element when dose per Minutes 0 to 59 Minutes 2408 Get Set Bio B Dose Sec INT Enter the dose cycle time Seconds element when dose per Minutes 0 to 59 Seconds 2409 Get Set Bio B Dose Hour INT En...

Page 208: ...INT If dosing on a Tuesday the set dose duration Seconds element 0 to 59 Seconds 2422 Get Set Bio B Dose Wed INT If timed dosing per week does a Wednesday dose need to be carried out 1076 Yes 1077 No 2423 Get Set Bio B Wed Time Hour INT If dosing on a Wednesday the time of day the dose occurs Hour element 0 to 23 Hour 2424 Get Set Bio B Wed Time Min INT If dosing on a Wednesday the time of day the...

Page 209: ... dosing on a Saturday the time of day the dose occurs Hour element 0 to 23 Hour 2439 Get Set Bio B Sat Time Min INT If dosing on a Saturday the time of day the dose occurs Minute element 0 to 59 Minute 2440 Get Set Bio B Sat Dur Min INT If dosing on a Saturday the set dose duration Minutes element 0 to 99 Minutes 2441 Get Set Bio B Sat Dur Sec INT If dosing on a Saturday the set dose duration Seco...

Page 210: ...d status 1077 No 1078 Yes 2457 Get Set Bio B Pre Bleed Min INT Set the pre bleed time Minutes element 0 to 99 Minutes 2458 Get Set Bio B Pre Bleed Sec INT Set the pre bleed time Seconds element 0 to 59 Seconds 2459 Get Set Bio B Man Dose Min INT Set the manual dose time Minutes element 0 to 99 Minutes 2460 Get Set Bio B Man Dose Sec INT Set the manual dose time Seconds element 0 to 59 Seconds Bioc...

Page 211: ...y the bleed occurs Hour element 0 to 23 Hour 2512 Get Set Bleed Mon Time Min INT If bleeding on a Sunday the time of day the bleed occurs Minute element 0 to 59 Minute 2513 Get Set Bleed Mon Dur Min INT If bleeding on a Monday the set bleed duration Minutes element 0 to 99 Minutes 2514 Get Set Bleed Mon Dur Sec INT If bleeding on a Monday the set bleed duration Seconds element 0 to 59 Seconds 2515...

Page 212: ... Thu Dur Min INT If bleeding on a Thursday the set bleed duration Minutes element 0 to 99 Minutes 2529 Get Set Bleed Thu Dur Sec INT If bleeding on a Thursday the set bleed duration Seconds element 0 to 59 Seconds 2530 Get Set Bleed Fri INT If timed bleeding per week does a Friday bleed need to be carried out 1076 Yes 1077 No 2531 Get Set Bleed Fri Time Hour INT If bleeding on a Friday the time of...

Page 213: ...lement 0 to 59 Seconds 2545 Get Set Bleed Day Time Hour INT Set the time of day Hour element when using a background bleed and the bleed per is set to week 0 to 23 Hour 2546 Get Set Bleed Day Time Min INT Set the time of day Minute element when using a background bleed and the bleed per is set to week 0 to 59 Minute 2547 Get Set Bleed Dur Min INT The set bleed duration Minutes element 0 to 99 Minu...

Page 214: ...kground timed dose enabled 1077 No 1078 Yes 2607 Get Set Inhibitor Dose Per INT Select the Dose cycle 1500 Hour 1501 Day 1502 Week 2608 Get Set Inhibitor Dose Min INT Enter the dose cycle time Minutes element when dose per Minute 0 to 59 Minutes 2609 Get Set Inhibitor Dose Sec INT Enter the dose cycle time Seconds element when dose per Minute 0 to 59 Seconds 2610 Get Set Inhibitor Dose Hour INT En...

Page 215: ...T If dosing on a Tuesday the set dose duration Seconds element 0 to 59 Seconds 2623 Get Set Inhibitor Dose Wed INT If timed dosing per week does a Wednesday dose need to be carried out 1076 Yes 1077 No 2624 Get Set Inhibitor Wed Time Hour INT If dosing on a Wednesday the time of day the dose occurs Hour element 0 to 23 Hour 2625 Get Set Inhibitor Wed Time Min INT If dosing on a Wednesday the time ...

Page 216: ...osing on a Saturday the time of day the dose occurs Hour element 0 to 23 Hour 2640 Get Set Inhibitor Sat Time Min INT If dosing on a Saturday the time of day the dose occurs Minute element 0 to 59 Minute 2641 Get Set Inhibitor Sat Dur Min INT If dosing on a Saturday the set dose duration Minutes element 0 to 99 Minutes 2642 Get Set Inhibitor Sat Dur Sec INT If dosing on a Saturday the set dose dur...

Page 217: ...leed enabled status 1077 No 1078 Yes 2658 Get Set Inhibitor Pre Bleed Min INT Set the pre bleed time Minutes element 0 to 99 Minutes 2659 Get Set Inhibitor Pre Bleed Sec INT Set the pre bleed time Seconds element 0 to 59 Seconds 2660 Get Set Inhibitor Man Dose Min INT Set the manual dose time Minutes element 0 to 99 Minutes 2661 Get Set Inhibitor Man Dose Sec INT Set the manual dose time Seconds e...

Page 218: ...Days 1509 5 Days 1510 6 Days 1511 Week 2712 Get Set pH Dose Mon INT If timed dosing per week does a Monday dose need to be carried out 1076 Yes 1077 No 2713 Get Set pH Mon Time Hour INT If dosing on a Monday the time of day the dose occurs Hour element 0 to 23 Hour 2714 Get Set pH Mon Time Min INT If dosing on a Sunday the time of day the dose occurs Minute element 0 to 59 Minute 2715 Get Set pH M...

Page 219: ...H Thu Time Hour INT If dosing on a Thursday the time of day the dose occurs Hour element 0 to 23 Hour 2729 Get Set pH Thu Time Min INT If dosing on a Thursday the time of day the dose occurs Minute element 0 to 59 Minute 2730 Get Set pH Thu Dur Min INT If dosing on a Thursday the set dose duration Minutes element 0 to 99 Minutes 2731 Get Set pH Thu Dur Sec INT If dosing on a Thursday the set dose ...

Page 220: ...pH Sun Dur Min INT If dosing on a Sunday the set dose duration Minutes element 0 to 99 Minutes 2746 Get Set pH Sun Dur Sec INT If dosing on a Sunday the set dose duration Seconds element 0 to 59 Seconds 2747 Get Set pH Day Time Hour INT Set the time of day Hour element when using a background dose and the dose per is set to week 0 to 23 Hour 2748 Get Set pH Day Time Min INT Set the time of day Min...

Page 221: ... the pre bleed time Minutes element 0 to 99 Minutes 2763 Get Set pH Pre Bleed Sec INT Set the pre bleed time Seconds element 0 to 59 Seconds 2764 Get Set pH Man Dose Min INT Set the manual dose time Minutes element 0 to 99 Minutes 2765 Get Set pH Man Dose Sec INT Set the manual dose time Seconds element 0 to 59 Seconds pH Control Configuration Floating Point Variables 2780 Get Set pH Vol FLOAT Set...

Page 222: ...No 2962 Get Set Redox Cal Rem Interval INT The Calibration Reminder Interval 0 999 Days 2963 Get Set Redox Cal Rem Date INT The time of the next Calibration Reminder Date element 1 31 Day of month 2964 Get Set Redox Cal Rem Month INT The time of the next Calibration Reminder Month element 1 12 Month of Year 2965 Get Set Redox Cal Rem Year INT The time of the next Calibration Reminder Year element ...

Page 223: ...trodeless Conductivity Sensor Configuration Floating Point Variables 3020 Get Set ECS Cell Const FLOAT The Electrodeless Conductivity Cell Constant 1 00 to 15 00 3022 Get Set ECS TDS Fact FLOAT The Electrodeless Conductivity TDS Factor 0 50 to 0 99 3024 Get Set ECS Temp Man Input FLOAT The Electrodeless Conductivity Temperature Compensation Manual Temperature Input 20 0 to 150 0 C or 4 0 to 302 0 ...

Page 224: ...00 Get pH Card INT Is the pH card present 1120 Not Present 1122 pH Present 3101 Get Set pH Enable INT The current status of the pH sensor enable 1540 Yes 1541 No 3102 Get Set pH Mode INT The current status of the pH sensor Mode 1080 Online 1081 Offline 3103 Get Set pH Sensor Temp Type INT The pH temperature sensor type 1069 PT1000 1070 PT100 1074 Disabled 3104 Get Set pH Temp Units INT The pH sens...

Page 225: ... Offset FLOAT The pH User Cal Offset value 2 00 to 2 00pH 3184 Get pH Cal Slope FLOAT The pH User Cal Slope value 70 00 to 130 00 3186 Get pH Temp Cal Offset FLOAT The pH Temperature User Cal Offset value 25 0 to 25 0 C or 13 0 to 77 0 F 3188 Get Set pH Cal Buffer Temp 1 FLOAT The pH User Cal Custom Buffer Temperature Point 1 20 0 to 150 0 C or 4 0 to 302 0 F 3190 Get Set pH Cal Buffer 4pH 1 FLOAT...

Page 226: ... Temp 8 FLOAT The pH User Cal Custom Buffer Temperature Point 8 20 0 to 150 0 C or 4 0 to 302 0 F 3232 Get Set pH Cal Buffer 4pH 8 FLOAT The pH User Cal Custom 4pH Buffer Point 8 0 00 to 14 00pH 3234 Get Set pH Cal Buffer 9pH 8 FLOAT The pH User Cal Custom 9pH Buffer Point 8 0 00 to 14 00pH 3236 Get Set pH Cal Buffer Temp 9 FLOAT The pH User Cal Custom Buffer Temperature Point 9 20 0 to 150 0 C or...

Page 227: ...15 Output Card Present 3301 Get Output Serial No LONG The Serial Number of the output card 0 to 9999999 Current Output A Configuration Integer Variables 3320 Get Set Current Output A Source INT The Input Source of Current Output A 1220 Disabled 1222 ECS 1223 ECS Temperature 1221 Redox 1224 pH 1225 pH Temperature 3321 Get Set Current Output A Output Mode INT The Output Mode of Current Output A 1135...

Page 228: ...0 0 to 150 0 C or 4 0 to 302 0 F 3377 Get Set Current Output B Span FLOAT The Current Output B Span Equivalent Value 2000 to 2000 Millivolts or 0 to 9999 μS cm or 0 00 to 14 00 pH or 20 0 to 150 0 C or 4 0 to 302 0 F Current Output C Configuration Integer Variables 3400 Get Set Current Output C Source INT The Input Source of Current Output C 1220 Disabled 1222 ECS 1223 ECS Temperature 1221 Redox 1...

Page 229: ... 1133 Hold Value 1134 4mA Current Output D Configuration Floating Point Variables 3455 Get Set Current Output D Zero FLOAT The Current Output D Zero Equivalent Value 2000 to 2000 Millivolts or 0 to 9999 μS cm or 0 00 to 14 00 pH or 20 0 to 150 0 C or 4 0 to 302 0 F 3457 Get Set Current Output D Span FLOAT The Current Output D Span Equivalent Value 2000 to 2000 Millivolts or 0 to 9999 μS cm or 0 00...

Page 230: ...ement 0 to 99 Minutes 3565 Get Set Digital Input 3 Rem Dose Sec INT Set the remote dose time Seconds element 0 to 59 Seconds Digital Input 4 Configuration 3590 Get Set Digital Input 4 Relay INT The relay digital input 4 is assigned to 1147 Disabled 1148 Biocide A 1149 Biocide B 1150 Bleed 1151 Inhibitor 1152 pH 1153 All 3591 Get Set Digital Input 4 Function INT The Function Digital Input 4 is set ...

Page 231: ...uration 3700 Get Redox Service Reminder INT Is the Redox Service Reminder Enabled 1076 Yes 1077 No 3701 Get Redox Service Alarm Date INT The Date of the next Service Alarm 1 to 31 Day of the Month 3702 Get Redox Service Alarm Month INT The Month of the next Service Alarm 1 to 12 Month of the Year 3703 Get Redox Service Alarm Year INT The Year of the next Service Alarm 0 to 99 Year 3704 Get Redox S...

Page 232: ...urs 3843 Get Set Water Meter Timeout Min INT The water meter time out Minutes element 0 to 59 Minutes System Clock Configuration 3860 Get Set System Clock Hour INT The System Clock Hour element HH MM 0 to 23 3861 Get Set System Clock Minute INT The System Clock Minute element HH MM 0 to 59 3862 Get Set System Clock Week Day INT The System Clock Day of the week 1 to 7 Monday to Sunday 3863 Get Set ...

Page 233: ...rimary Variable INT Trace 1 Left hand axis Refer to Table 1 page 232 3944 Trend 2 3974 Trend 3 3915 Get Set Trend 1 Secondary Variable INT Trace 2 Right hand axis Refer to Table 1 page 232 3945 Trend 2 3975 Trend 3 Data logging Live Trend Configuration Floating Point Variables 3920 Get Set Trend 1 Primary Variable Min Value FLOAT Trace 1Minimum Value Value Dependent on Primary Variable 3950 Trend ...

Page 234: ... TDS 1593 Electrodeless Sensor Temperature C 1594 F 1595 pH Sensor pH 1610 pH Sensor Temperature C 1614 F 1615 Current Output A Redox 1630 ECS 1631 ECS Temp 1632 pH 1633 pH Temp 1634 Current Output B Redox 1645 ECS 1646 ECS Temp 1647 pH 1648 pH Temp 1649 Current Output C Redox 1660 ECS 1661 ECS Temp 1662 pH 1663 pH Temp 1664 Current Output D Redox 1675 ECS 1676 ECS Temp 1677 pH 1678 pH Temp 1679 ...

Page 235: ...t Inhibitor Manual Dose 124 Start pH Control Manual Dose Reset User Calibrations 130 Reset Redox Calibration 131 Reset ECS Sensor Calibration 132 Reset ECS Solution Calibration 133 Reset ECS Temperature Calibration 134 Reset pH Calibration 135 Reset pH Temperature Calibration 136 Reset Current Output A Calibration 137 Reset Current Output B Calibration 138 Reset Current Output C Calibration 139 Re...

Page 236: ...l Store B 182 Restore Entire Unit from Internal Store A 183 Restore Entire Unit from Internal Store B 184 Erase Internal Store A 185 Erase Internal Store B 186 Reset Entire Unit Data Logging Functions 190 Start Stop SD Card Data Logging 191 Save Live Trend 1 Data to SD Card 192 Save Live Trend 2 Data to SD Card 193 Save Live Trend 3 Data to SD Card ...

Page 237: ...ve 1 Active 511 Biocide B Tank Level Switch 0 Inactive 1 Active 512 Inhibitor Tank Level Switch 0 Inactive 1 Active 513 pH Control Tank Level Switch 0 Inactive 1 Active Pre Bleeding State 520 Biocide A Pre Bleeding 0 Inactive 1 Active 521 Biocide B Pre Bleeding 0 Inactive 1 Active 522 Inhibitor Pre Bleeding 0 Inactive 1 Active 523 pH Control Pre Bleeding 0 Inactive 1 Active Bleed Inhibited State 5...

Page 238: ... Status 0 Inactive 1 Active 582 Digital Input 3 Status 0 Inactive 1 Active 583 Digital Input 4 Status 0 Inactive 1 Active 584 Digital Input 5 Status 0 Inactive 1 Active Controller Errors 600 E001 Processor RAM Error 0 Inactive 1 Active 601 E002 External RAM Error 0 Inactive 1 Active 602 E003 Internal Setup Checksum Error 0 Inactive 1 Active 603 E004 Output Card Checksum Error 0 Inactive 1 Active 6...

Page 239: ...3 E033 Redox Store B Checksum Error 0 Inactive 1 Active 634 E034 Redox Factory Cal Checksum Error 0 Inactive 1 Active 635 E035 Redox User Cal Checksum Error 0 Inactive 1 Active 636 E041 Redox Sensor Input Over Range 0 Inactive 1 Active 637 E042 Redox Sensor Input Under Range 0 Inactive 1 Active 638 E047 Redox Sensor Calibration Due 0 Inactive 1 Active 639 E048 Redox Planned Service Due 0 Inactive ...

Page 240: ...nductivity Sensor Calibration Due 0 Inactive 1 Active 663 E098 Electrodeless Conductivity Planned Service Due 0 Inactive 1 Active 664 E099 Electrodeless Conductivity SD Card Store Checksum Error 0 Inactive 1 Active pH Sensor Input Errors 680 E130 pH Card Checksum Error 0 Inactive 1 Active 681 E131 pH Setup Checksum Error 0 Inactive 1 Active 682 E132 pH Store A Checksum Error 0 Inactive 1 Active 68...

Page 241: ...184 Biocide A SD Card Checksum Error 0 Inactive 1 Active 715 E185 Biocide A Time Setting Configuration Error 0 Inactive 1 Active Biocide B Errors 720 E201 Biocide B Store A Checksum Error 0 Inactive 1 Active 721 E202 Biocide B Store B Checksum Error 0 Inactive 1 Active 722 E203 Biocide B Setup Checksum Error 0 Inactive 1 Active 723 E204 Biocide B SD Card Checksum Error 0 Inactive 1 Active 724 E205...

Page 242: ...nactive 1 Active 755 E265 pH Control Time Setting Configuration Error 0 Inactive 1 Active Alarm Relay Errors 760 E281Alarm Relay Store A Checksum Error 0 Inactive 1 Active 761 E282 Alarm Relay Store B Checksum Error 0 Inactive 1 Active 762 E283 Alarm Relay Setup Checksum Error 0 Inactive 1 Active 763 E284 Alarm Relay SD Card Checksum Error 0 Inactive 1 Active Current Output A Errors 770 E300 Curre...

Page 243: ...327 Current Output B Setup Checksum Error 0 Inactive 1 Active 798 E328 Current Output B SD Card Checksum Error 0 Inactive 1 Active Current Output C Errors 810 E340 Current Output C Hardware Fault 0 Inactive 1 Active 811 E341 Sensor Input Less Than Current Output C Zero 0 Inactive 1 Active 812 E342 Sensor Input Greater Than Current Output C Span 0 Inactive 1 Active 813 E343 Sensor Input Less Than C...

Page 244: ...ecksum Error 0 Inactive 1 Active 852 E382 Digital Input 1 Setup Checksum Error 0 Inactive 1 Active 853 E383 Digital Input 1 SD Card Checksum Error 0 Inactive 1 Active Digital Input 2 Errors 860 E390 Digital Input 2 Store A Checksum Error 0 Inactive 1 Active 861 E391 Digital Input 2 Store B Checksum Error 0 Inactive 1 Active 862 E392 Digital Input 2 Setup Checksum Error 0 Inactive 1 Active 863 E393...

Page 245: ...nactive 1 Active 912 E442 Electrodeless Conductivity Card Communication Failure 0 Inactive 1 Active 913 E443 Electrodeless Conductivity Card Communication Error 0 Inactive 1 Active 914 E444 pH Card Communication Failure 0 Inactive 1 Active 915 E445 pH Card Communication Error 0 Inactive 1 Active 916 E446 Internal Outputs Communication Failure 0 Inactive 1 Active 917 E447 Internal Outputs Communica...

Page 246: ...Appendix F 244 MTD75 Operation Guide Appendix F Blank ...

Page 247: ... had its power turned off Check instrument time E007 UNIT Unit Setup Checksum Error The instrument configuration has for some reason become corrupted Try switching the unit off and then on again If the message persists Reset the whole unit from the Load Default Settings option in the Save Restore menu or consult with your supplier as this unit may require a repair E008 UNIT Unit Store A Checksum E...

Page 248: ... may require to be returned for repair E131 pH E032 Redox Store A Checksum Error E082 ECS The data in Store A has become corrupted Check the input card s setup Then save the setup back to Store A in the Save Restore menu E132 pH E033 Redox Store B Checksum Error E083 ECS The data in Store B has become corrupted Check the input card s setup Then save the setup back to Store B in the Save Restore me...

Page 249: ... is reading open or closed circuit due in most cases to a damaged sensing element or incorrect wiring Check that the temperature sensor is set to the correct type in the channel setup menu Under this condition the unit will default to the fixed temperature setting for compensation purposes If the message persists please consult with your supplier E094 ECS Temp Input Over Range E144 pH The temperat...

Page 250: ...io A Store B Checksum Error E202 Bio B The Store B Save for the relay has become corrupted Check the relay s settings and then save the settings again in the Store B in the Save Restore menu E222 Bleed E242 Inhib E262 pH Cont E282 Alarm E183 Bio A Setup Checksum Error E203 Bio B The Setup for this relay has become corrupted Check and correct the relay settings and turn the unit off and on again If...

Page 251: ...06 A Store B Checksum Error E326 B The Store B Save for the current output has become corrupted Check the current output s settings in the current output menu and then save the settings again in the Save Restore menu E346 C E366 D E307 A Setup Checksum Error E327 B The Setup for this current output has become corrupted Check and correct the current output s settings and turn the unit off and on ag...

Page 252: ...ecome corrupted Check the Modbus settings in the Modbus menu and then save the settings again in Store B in the Save Restore menu E433 UNIT SD Card Checksum Error The SD Card store from which the Modbus setup was restored from has become corrupted Check the Modbus settings in the Modbus menu and then save the settings again to the SD card store Communication Errors E440 Redox Communication Failure...

Page 253: ...tup for the Data Logging has become corrupted Check and correct the Data Logging settings and turn the unit off and on again If the message persists please consult with your supplier E451 UNIT Store A Checksum Error The Store A Save for Data Logging has become corrupted Check the Data Logging settings in the Data Logging menu and then save the settings again in Store A in the Save Restore menu E45...

Page 254: ...Appendix G 252 MTD75 Operation Guide Appendix G BLANK ...

Page 255: ...k the measurement by an independent method for example using a handheld meter The Controller Appears Dead Check that the front panel controller fuse is in working condition See page 31 Check that power is available to the controller Using a voltmeter set to AC or DC check the power supply voltage at the connector The design of the MTD75 allows the unit to accept from 85 to 250V AC or DC Check that...

Page 256: ...connections Check that any in line junction boxes and extension cables have been fitted and wired up correctly The Electrodeless Conductivity Sensor Reading Is Incorrect Low reading due to incomplete immersion There may be some trapped matter within the sensor bore High conductivity readings caused by a short circuit or leakage of liquid contamination into the sensor moulding Low conductivity can ...

Page 257: ...mp grease or liquids near connectors junction boxes or terminations Where extension cables have been used try connecting the sensor directly to the instrument The Temperature Reading Is Incorrect Check that the temperature sensor is correctly attached See Installation Section Check that the temperature sensor type is correctly selected in the Sensor Setup menu Where practical check the temperature...

Page 258: ...id must not be separated from the core conductor by more than 5mm in order to avoid hum pickup Cables should be kept as short as possible and must be run separately 100mm separation typically from any power carrying cable Cable Length The response of the instrument to a sudden change in the sensor input will be determined mainly by the source resistance of the electrode and the length of the conne...

Page 259: ...s are used no further guarantee is given although any complaints concerning their operation will be carefully investigated Goods for attention under guarantee unless otherwise agreed must be returned to the factory carriage paid and if accepted for free repair will be returned to the customer s address free of charge Arrangements can also be made for repair on site in which case a charge may be ma...

Page 260: ...Notes 258 MTD75 Operation Guide ...

Page 261: ...Notes MTD75 Operation Guide 259 ...

Page 262: ...Resistor 124 Manual Temperature 119 Mode 118 Reminder 122 Slope 120 Solution 119 Temperature Offset 120 Calibration pH 125 Auto 125 133 Best Practice 125 Buffer Solutions 137 Calibration Principle 125 127 Condition 130 Custom Buffer 132 Front Access 130 History 129 Manual 125 135 Manual Temperature 127 Mode 126 Offset 128 135 Reminder 131 Slope 128 136 Temperature Offset 129 Calibration Redox 111 ...

Page 263: ... Card 155 Front Screen 55 Fuse Panel 31 H Headers A B 20 Headers C E 21 I Inhibitor 79 Bleed Duration 79 81 Bleed Inhibiting 80 84 Dose Duration 83 Manual Doseing 80 85 Mode 81 Output Mode 79 84 Pre Dose Bleeding 80 85 Source 81 Stroke Rate 84 Timed Dose 82 Timed Dosing 79 82 Volume Dosing 79 82 Water Meter X 79 Installation 17 Interference 18 K K Factor 152 L LCD 55 LED 55 Live Trending 171 Confi...

Page 264: ...x Input Filter 100 Installation 34 Maintenance 34 Mode 100 Sensor Enable 99 Setup 99 Reset Setup 161 S Safety 2 Save Restore Setup 161 Scrolling Menu Layout 56 SD Card 54 SD Card Data Logging 175 Log Interval 175 Loop Recording 176 Start Stop 176 SD Card Save Restore 161 Security Access Code 58 Default Code 58 Key Symbol 58 Management 59 Padlock Symbol 58 Timeout 58 Sensor Input Card 19 20 21 Serv...

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Page 266: ...Chaul End Lane Luton Bedfordshire LU4 8EZ United Kingdom Telephone 44 0 1582 593693 Fax 44 0 1582 598036 Email sales lth co uk Web www lth co uk ...

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