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Profibus Communications

Section 12: Profibus Communications

Instruction Manual

April 2017

LIQ-MAN-56

12.3.2

Profibus Faults and Warnings

Faults

The 56 displays the following hardware faults associated with problems related to the

Profibus board and its connection to the main board:
•

Profibus board mismatch -

The revision of the installed Profibus board is not compati-

ble with the main board of the transmitter. Note the revisions of the Profibus board and

the main board of the transmitter and contact the factory.

•

Self-test failed -

At power up, the Profibus board conducts several internal self tests. At

least one of them failed.
1. Try to reset the analyzer by cycling the power.
2. Replace the Profibus board

•

Internal communication failed -

The main board detects the Profibus board, but the

Profibus board is not communicating with the main board.
1. Try to reset the analyzer by cycling the power.
2. Check the interconnecting cable between the Profibus and main board.
3. Replace the Profibus board.

Warnings

Warnings related to cable problems and software compatibility are also displayed, if Profibus

cable diagnostics are enabled:

•

Cable shorted or open -

No Profibus cable is connected, or the A and B leads of the

cable are shorted.

•

Check Profibus Cable -

The A and B leads in the Profibus cable august be reversed. If

standard Profibus cable is used, the green lead should be wired to position A and the red

lead to position B. The bus august not have a terminator, or it august not be turned on.

Check to see that a terminator is present and turned on.

•

Profibus function limited -

The Profibus board has new features that the main board

software does not support. If this is the case, the minor revision number of the Profibus

board will be greater than the minor revision number of the main board. Replace the

main board.

Details on these faults and warnings are accessed like any other fault or warning in the 56:

Press the INFO key and then select “Faults – fix now” or “Warnings – fix soon.”

LED Diagnostics

The Profibus board itself displays diagnostic information via an LED, which is located on the

upper right side of an installed board:
•

Slow blink –

No cable is present or the connection is shorted

•

Slow, even blinking –

reversed A and B cable connection

•

Quick flashing –

Profibus message detected

•

1 second blinking –

self-test failure

•

Off –

no power or a defective or missing ribbon cable

Содержание Rosemount 56

Страница 1: ...Instruction Manual LIQ MAN 56 Rev D April 2017 Rosemount 56 Advanced Dual Input Analyzer ...

Страница 2: ......

Страница 3: ...anual Follow appropriate local and national codes Only connect the product to electrical sources specified in this manual Use only factory documented components for repair Tampering or unauthorized substitution of parts and proce dures can affect the performance and cause unsafe operation of your process All instrument enclosures must be closed and protective covers must be in place unless qualifi...

Страница 4: ...g devices pursuant to Subpart J of Part 15 of FCC Rules which are designed to pro vide reasonable protection against such interference Operation of this equipment in a residential area august cause interference in which case the user at his own expense will be required to take whatever measures august be required to correct the interference CAUTION This product is not intended for use in the light...

Страница 5: ...E To edit a field with backlit focus press ENTER MENU To scroll up or down use the keys to above or below the ENTER key To move the cursor left or right use the keys to the left or right of the ENTER key To edit a numeric value including decimal points use the alphanumeric keypad then press ENTER h NOTE Press ENTER to store a setting or value Press EXIT to leave without storing changes Pressing EX...

Страница 6: ...n Incendive Field Wiring drawings C 11 13 Add sec 9 Advanced Relay Functions Add procedure for Software Update and Configuration Transfer via USB for units manufactured October 2012 and later Add procedure for Data Logger and Event Logger Download to USB Add new sections for HART and Profibus Communications Add Appendix 1 HART and Device and Appendix 2 HART Status Bits D 04 17 Updated the Address ...

Страница 7: ...r Cable 22 3 4 Power Output Alarms and Sensor Connections 22 Section 4 Display and Operation 4 1 User Interface 31 4 2 Instrument Keypad 31 4 3 Main Display 31 4 4 Menu System 32 4 5 USB Data Port 33 4 6 56 Data Logger and Event Logger Download Procedure 33 4 7 Software Upgrade 35 4 8 Configuration Transfer 35 Section 5 Programming the Analyzer Basics 5 1 General 37 5 2 Changing the Startup Settin...

Страница 8: ... Relay Functions 9 1 General 67 9 2 High Low Concentration Alarm 67 9 3 Delay Timer 68 9 4 Bleed and Feed 70 9 5 Totalizer Based Relay Activation 71 9 6 Interval Timer 72 9 7 Date and Time Activation 74 Section 10 Calibration 10 1 Calibration Introduction 75 10 2 pH Calibration 75 10 3 ORP Calibration 76 10 4 Contacting Conductivity Calibration 77 10 5 Toroidal Conductivity Calibration 79 10 6 Chl...

Страница 9: ...ibus Communications 12 1 General 95 12 2 Profibus Features 95 12 3 Profibus Communications 96 12 4 Data Transmission 100 12 5 Installation and Wiring 111 Section 13 Maintenance 13 1 Overview 113 13 2 Analyzer Maintenance 113 13 3 USB Port 113 Section 14 Return of Material 14 1 General 115 14 2 Warranty Repair 115 14 3 Non Warranty Repair 115 HART Appendix 1 117 HART Appendix 2 121 EC Declaration o...

Страница 10: ...iv Table of Contents Instruction Manual April 2017 LIQ MAN 56 ...

Страница 11: ...cator and HART hosts such as AMS Intelligent Device Manager 56 Profibus units are fully compatible with Profibus DP networks and Class 1 or Class 2 masters HART and Profibus DP configured units will support any single or dual measurement configurations of the 56 Menus Easily managed window screens for easy navigation to local configuration and routine calibration Quick Start and all menu screens a...

Страница 12: ...vents are recorded including start up time calibrations hold outputs configurations alarms power interruptions faults and more All process data and events are time date stamped USB 2 0 Data Transfer Port A USB port is built in to allow local data transfer of process data and events using a standard USB memory device Cleanly formatted EXCEL data is useful for evaluation of process data on a compute...

Страница 13: ... NOTE To ensure a water tight seal tighten all four front panel screws to 6 in lbs of torque Dimensions 6 2 x 6 2 x 5 2 in 157 x 157 x 132 mm Conduit openings Accepts 6 PG13 5 or 1 2 in conduit fittings Display Large 3 75 x 2 2 in 95 3 x 55 9mm high resolution color LCD displays large process variables and user definable display of diagnostic parameters Calibration programming and information scre...

Страница 14: ... 1400667 Evaluated to FM Standards 3600 2011 3611 2004 3810 2005 ANSI IEC 60529 2004 Note Single input Turbidity configurations models 56 02 27 38 or HT 56 03 27 38 or HT and dual input Turbidity only configurations 56 02 27 37 or HT 56 03 27 37 or HT are FM approved class I Div 2 for hazardous area installation Ordinary Locations only with UL ordering option Options for UL 02 03 20 21 22 24 25 26...

Страница 15: ...vate the relay when a sensor or analyzer fault occurs Each relay can be configured independently Alarm logic high or low activation or USP and deadband are user programmable USP alarm can be programmed to activate when the conductivity is within a user selectable percentage of the limit conductivity resistivity measurement only Relays Form C SPDT epoxy sealed Inductive load 1 8 HP motor max 115 24...

Страница 16: ...d Solids Calculated by multiplying conductivity at 25 C by 0 65 Five percent concentration curves 0 12 NaOH 0 15 HCl 0 20 NaCl 0 25 or 96 99 7 H2SO4 The conductivity concentration algorithms for these solutions are fully temperature compensated Four temperature compensation options manual slope X C high purity water neutral salt cation conductivity dilute hydrochloric acid and raw Input filter tim...

Страница 17: ...rcent concentration curves 0 12 NaOH 0 15 HCl 0 20 NaCl 0 25 or 96 99 7 H2SO4 The conductivity concentration algorithms for these solutions are fully temperature compensated For other solutions the analyzer accepts as many as five data points and fits either a linear two points or a quadratic function three or more points to the data Reference temperature and linear temperature slope august also b...

Страница 18: ...wo contacting conductivity sensors are used Performance Specifications pH input Analyzer Measurement Range pH 0 to 14 pH Accuracy 0 01 pH Diagnostics glass impedance reference impedance Temperature coefficient 0 002pH C Solution temperature correction pure water high pH dilute base Ammonia and custom Bufferrecognition NIST includingnon NISTpH7 01buffer DIN19267 Ingold Merck and Fisher Input filter...

Страница 19: ... and flow and for continuous pressure input for continuous measurement of oxygen gas External input of atmospheric pressure for oxygen measurement allows continuous partial pressure compensation while the 56 enclosure is completely sealed Externally sourced current input is also useful for calibration of new or existing sensors that require temperature measurement or atmospheric pressure inputs In...

Страница 20: ... constant 1 999 sec default 5 sec Response time 6 seconds to 95 of final reading Recommended Sensors Chlorine 499ACL 01 Free Chlorine or 499ACL 02 Total Chlorine pH The following pH sensor is recommended for automatic pH correction of free chlorine readings 3900 Monochloramine The 56 is compatible with the 499A CL 03 Monochloramine sensor The 56 fully compensates readings for changes in membrane p...

Страница 21: ...caused by temperature For more information concerning the use and operation of the amperometric chlorine sensors refer to the product data sheets Performance Specifications Analyzer Resolution 0 001 ppm or 0 01 ppm selectable Input Range 0 nA 100 µA pH independent Temperature compensation Automatic via RTD or manual 0 50 C Input filter Time constant 1 999 sec default 5 sec Response time 6 seconds ...

Страница 22: ...A 100 µA Temperature Compensation Automatic or manual 0 50 C Input filter Time constant 1 999 sec default 5 sec Response time 6 seconds to 95 of final reading Recommended Sensor Rosemount amperometric membrane and steam sterilizable sensors listed above 1 11 Dissolved Ozone Code 26 and 36 The 56 is compatible with the 499AOZ sensor The 56 fully compensates ozone readings for changes in membrane pe...

Страница 23: ...cable and debubbler Performance Specifications Analyzer Units Turbidity NTU FTU or FNU total suspended solids mg L ppm or no units Display resolution turbidity 4 digits decimal point moves from x xxx to xxx x Display resolution TSS 4 digits decimal point moves from x xxx to xxxx Calibration methods User prepared standard commercially prepared standard or grab sample For total suspended solids user...

Страница 24: ... connectors for power and current outputs and four solid plugs for closure of openings HART digital communications is included at no additional charge Profibus digital communications is optional Level 1 POWER 02 24 VDC with four alarm relays 03 85 265 VAC switching 50 60 Hz with four alarm relays Level 2 MEASUREMENT 1 20 Contacting Conductivity 21 Toroidal Conductivity 22 pH ORP 23 Flow Current In...

Страница 25: ... and electromagnetic and radio frequency interference are minimized or absent 3 Keep the analyzer and sensor wiring at least one foot from high voltage conductors Be sure there is easy access to the analyzer 4 The analyzer is suitable for panel pipe or surface mounting See Figures 2 1 and 2 2 5 Install cable gland fittings and plugs as needed to properly seal the analyzer on all six en closure ope...

Страница 26: ...Fig 2 1 Panel Mounting Installation dimensions MILLIMETER INCH 16 Installation Section 2 Installation Instruction Manual April 2017 LIQ MAN 56 ...

Страница 27: ...Shown with Mounting Kit PN 23820 00 Fig 2 2 Pipe and Wall Mounting Installation dimensions MILLIMETER INCH Installation 17 Instruction Manual Section 2 Installation LIQ MAN 56 April 2017 ...

Страница 28: ...18 Installation Section 2 Installation Instruction Manual April 2017 LIQ MAN 56 Fig 2 3 FM Non incendive field wiring installation for the 56 27 37 Analyzer AREA AREA C OR OR ...

Страница 29: ... C48 R53 C46 0 5 C U18 C49 C23 R57 U8 C52 U17 C32 U16 R65 C51 R73 R75 C22 R56 R49 R47 C47 J3 ASSY 24236 REV TURBIDITY 1 3 C25 4 POWER SUPPLY ALARM WIRING VAC OPTIONAL ANALOG OUTPUT OPTIONAL SENSOR 1 ANY CSA APPROVED SENSOR OR SIMPLE APPARATUS UNCLASSIFIED AREA MODEL 56 CLASS 1 DIVISION 2 GROUPS ABCD 0 50 C CLASS II III DIVISION 2 GROUPS EFG 9 THE EPA AND ISO CLARITY II TURBIDITY SENSORS ARE APPROV...

Страница 30: ...Section 2 Installation Instruction Manual April 2017 LIQ MAN 56 20 Installation ...

Страница 31: ...ble on the 56 and can be switched using the local keypad A Profibus DP communication board is available as options for 56 communication with a host HART communications supports Bell 202 digital communications over an analog 4 20 mA current output Profibus DP is an open communications protocol which operates over a dedicated digital line to the host 3 1 4 Alarm relays Four alarm relays are supplied...

Страница 32: ...onthePower Supplyboard WirethepowerleadstothePowerSupplyboardusingtheleadmarkingsonthe board The grounding plate is connected to the earth terminal of the 03 order code 85 265 VAC power supply The green colored screws on the grounding plate are intended for connection to some sensors to minimize radio frequency interference The green screws are not intended to be used for safety purposes 3 4 2 Cur...

Страница 33: ...disconnect the analyzer from the main power supply Install the switch or breaker near the analyzer and label it as the disconnecting device for the analyzer Keep sensor and output signal wiring separate from power wiring Do not run sensor and power wiring in the same conduit or close together in a cable tray RISK OF ELECTRICAL SHOCK Electrical installation must be in accordance with the National E...

Страница 34: ...ower Wiring for 56 24 VDC Power Supply 02 order code PN 24365 00 24 Wiring Section 3 Wiring Instruction Manual April 2017 LIQ MAN 56 FIGURE 3 2 Power Wiring for 56 85 264 VAC Power Supply 03 order code PN 24358 00 ...

Страница 35: ...FIGURE 3 3 Output Wiring for 56 Main PCB PN 24308 00 Wiring 25 Instruction Manual Section 3 Wiring LIQ MAN 56 April 2017 ...

Страница 36: ...Figure 3 4 56 Recommended Wire Entry Points Figure 3 5 56 Recommended Wire Entry and THUM Adaptor Installation 26 Wiring Section 3 Wiring Instruction Manual April 2017 LIQ MAN 56 ...

Страница 37: ...ure 3 6 Contacting Conductivity signal board and Sensor Cable Leads Figure 3 7 Toroidal Conductivity Signal board and Sensor Cable Leads Wiring 27 Instruction Manual Section 3 Wiring LIQ MAN 56 April 2017 ...

Страница 38: ...ure 3 8 pH ORP ISE Signal Board and Sensor Cable Leads Figure 3 9 Amperometric signal Chlorine Oxygen Ozone board and Sensor cable leads 28 Wiring Section 3 Wiring Instruction Manual April 2017 LIQ MAN 56 ...

Страница 39: ...Figure 3 10 Turbidity Signal Board with Plug in Sensor Connection Figure 3 11 Flow Current Input Signal Board and Sensor Cable Leads Wiring 29 Instruction Manual Section 3 Wiring LIQ MAN 56 April 2017 ...

Страница 40: ...30 Wiring Section 3 Wiring Instruction Manual April 2017 LIQ MAN 56 ...

Страница 41: ...d calibration or lengthy tags to describe process points sensors or instrumentation 4 2 Instrument Keypad There are three Function keys four Navigation keys and an alpha numeric keypad on the instrument keypad Function keys The ENTER MENU key is used to access menus for programming and calibrating the instrument as well as retrieving stored data Eight top level menu items appear when pressing the ...

Страница 42: ...e made by pressing the key multiple times to toggle to characters that are available on each key 4 3 Main Display The 56 displays one or two primary measurement values up to six secondary measurement values fault and warning banner alarm relay flags and a digital communications icon Process Measurements Two process variables are displayed if two signal boards are installed One process variable and...

Страница 43: ...f downloading and uploading analyzer configurations The USB data port is easily accessed by inserting a coin in the vertical slot of the cover and rotating counterclockwise one quarter turn to remove the cover and Type 4 seal Caution not all USB memory devices will physically fit into the 56 data port After removing the USB cover and seal make sure that the USB memory device can be easily and full...

Страница 44: ...gust exit the Download completed screen by selecting BACK 16 To view data logger files insert the USB flash drive into a computer On the designated drive associated with the USB flash drive individual data logger files for each day can be opened as EXCEL formatted files in the root directory of the USB drive Note that the data codes are assigned file names based on the analyzer s recognized dates ...

Страница 45: ...se procedures at 56 menu location MENU Data storage and retrieval Download Download measurement data and at Download Download Events 4 With the 56 analyzer powered up and the front enclosure panel completely closed re move the Type 4 cap from the front display by inserting a coin into the cap s vertical slot and rotating counterclockwise Remove the USB cap and seal to access the data port 5 Carefu...

Страница 46: ...lect Copy data Press ENTER 8 An information screen appears warning users that any configuration files that exist in the root directly of the flash drive will be over written upon configuration transfer If No is se lected default setting existing configuration files will not be overwritten Select Yes to transfer the configuration file to the flash drive 9 The configuration file will be transferred ...

Страница 47: ...type measurement units or temperature units that were initially entered in Quick Start choose the Reset function or access the Program menus for sensor 1 or sensor 2 The following choices for specific measurement type measurement units are available for each sensor measurement board Signal board Available measurements Measurements units pH ORP 22 32 pH ORP Redox Ammonia Fluoride Custom ISE pH mV O...

Страница 48: ... 56 uses the temperature entered by the user in all temperature correction calculations To select automatic or manual temp compensation set the manual reference temperature and to program temperature units as C or F access the Temperature screens by pressing ENTER MENU from the main screen 5 4 Configuring and Ranging the Current Outputs The 56 accepts inputs from two sensors and has four analog cu...

Страница 49: ... When entering the correct access code for the Calibration Hold security level the Calibration and Hold menus are accessible This allows operators or technicians to perform routine maintenance This security level does not allow access to the Program or Display menus When entering the correct access code for All security level the user has access to all menu functions including Programming Calibrat...

Страница 50: ...56 offers three options for resetting factory defaults a reset all settings to factory defaults b reset sensor calibration data only c reset analog output settings only To reset to factory defaults reset calibration data only or reset analog outputs only access the Reset screen by pressing ENTER MENU from the main screen 5 9 Programming Alarm Relays The 56 24 VDC 02 order code and the AC switching...

Страница 51: ...nt to a specific relay select the desired measurement or temperature input and press ENTER MENU 4 To set relay logic to activate alarms at a High reading or a Low reading select high or low and press ENTER MENU 5 To enter setpoints for relays enter the desired value for the process measurement or temperature at which to activate an alarm event and press ENTER MENU 6 To set deadband as a measuremen...

Страница 52: ...ate Relay Action screen by pressing ENTER MENU from the main Relay programming screen Alarm relays can be manually set for the purposes of checking devices such as valves or pumps Under the Alarms Settings menu this screen will appear to allow manual forced activation of the alarm relays Select the desired alarm condition to simulate 42 Programming Basics Section 5 Programming Basics Instruction M...

Страница 53: ...l constant for a contacting or toroidal sensor see Sec s 6 4 6 5 10 Entering a temperature element RTD offset or temperature slope conductivity see Sec s 6 4 11 Creating an application specific concentration curve conductivity see Sec s 6 4 6 5 12 Enabling automatic pH correction for free chlorine measurement Sec 6 6 1 To fully configure the analyzer for each installed measurement board you august...

Страница 54: ...mpedance and Reference Impedance in EXCEL data log sheets after data download to USB Enabling pH sensor diagnostics also allows assignment of Glass Impedance and Reference Impedance to the two dimensional on screen process graph accessible under Display Setup View Graph 6 3 ORP Measurement Programming The section describes how to configure the 56 analyzer for ORP measurements The following program...

Страница 55: ...mp Comp Slope Neutral Salt Cation or Raw 8 Slope 2 00 C Enter the linear temperature coefficient 9 Ref Temp 25 0 C Enter the Refer ence temp 10 Cal Factor default 0 95000 cm Enter the Cal Factor for 4 Electrode sensors from the sensor tag To configure the contacting conductivity measurement board access the Program screen by pressing ENTER MENU from the main screen and then select the Measurement ...

Страница 56: ...0 C Enter the linear temperature coefficient 7 Ref Temp 25 0 C Enter the Reference temp 8 Filter 2 sec Override the default input filter enter 0 999 seconds 9 Range Auto Select measurement Auto range or specific range To configure the Contacting conductivity measurement board access the Program screen by pressing ENTER MENU from the main screen and then select the Measurement tab 1 To program a Me...

Страница 57: ...orine sub section describes how to configure the 56 analyzer for Free Chlorine measurement using amperometric chlorine sensors The following programming and configuration functions are covered 1 Measure Free Chlorine Select Free Chlorine pH Ind Free Cl Total Cl Monochloramine 2 Units ppm Select units ppm or mg L 3 Resolution 0 001 Select display res olution 0 01 or 0 001 4 Free Cl Correct Live Sel...

Страница 58: ...lorine pH Ind Free Cl Total Cl or Monochloramine and press ENTER MENU 2 To program the Measurement Units select ppm mg L and press ENTER MENU 3 To program the Measurement Resolu tion Select 0 01 or 0 001 and press ENTER MENU 4 To Override the default input filter enter 0 999 seconds and press ENTER MENU 5 To use Dual Slope Calibration select Enable or Disable and press ENTER MENU 6 6 3 Monochloram...

Страница 59: ... measurements using the pH independent free chlorine sensor 498CL 01 manufactured by Rosemount The following programming and configuration functions are covered 1 Measure Free Chlorine Select Free Chlorine pH Ind Free Cl Total Cl Monochloramine 2 Units ppm Select units ppm or mg L 3 Resolution 0 001 Select display resolution 0 01 or 0 001 4 Filter 5sec Override the default input filter enter 0 999...

Страница 60: ... mbar or bar for Par tial pressure 1 To program Sensor type Select Water Waste Trace BioRx BioRx Other Brew or O2 In Gas and press ENTER MENU 2 To program Measure type Select Concentration Saturation Partial Pressure or Oxygen in Gas and press ENTER MENU 3 To program measurement Units Select ppm mg L ppb g L Sat O2 Gas or ppm Oxygen Gas and press ENTER MENU 4 To program Pressure Units Select press...

Страница 61: ...0 999 seconds and press ENTER MENU 6 10 Turbidity Measurement Programming This section describes how to configure the 56 analyzer for Turbidity measurements The following programming and configuration functions are covered 1 Measurement type Turbidity Select Turbidity or TSS calculation estimated TSS 2 Sensor type Select EPA or ISO 3 Measurement units NTU FTU FNU 4 Filter 20 sec Override the defau...

Страница 62: ...Current Input and press ENTER MENU 2 To program Measurement units Select GPM GPH cu ft min cu ft hour LPM L hour or m3 hr and press ENTER MENU 3 To Override the default input filter enter 0 999 seconds and press ENTER MENU 6 12 Current Input Programming This section describes how to configure the 56 analyzer for current input measurement when wired to an external device that transmits 4 20 mA or 0...

Страница 63: ...ER MENU 3 To program measurement units Select measurement units based on selected input device type and press ENTER MENU 4 To program the Input Range Select 4 20 mA or 0 20 mA and press ENTER MENU 5 To program the Low input Value enter the low measurement value to assign to 4mA and press ENTER MENU 6 To program the High input Value enter the high measurement value to assign to 20mA and press ENTER...

Страница 64: ...Section 6 Programming Measurements Instruction Manual April 2017 LIQ MAN 56 54 ...

Страница 65: ...duce the output The control range is the percent of the analog output span the difference between the 4 or 0 mA and 20 mA settings through which the measured variable must move to change the output from minimum to maximum The smaller the Gain the less the controller reacts to changes in the measured variable The larger the Gain the more the controller reacts to changes in the measured variable The...

Страница 66: ...put as the measured variable increases toward the setpoint The LRV is usually set to the setpoint value so that the control output is 0 at the setpoint and the URV is less than the setpoint value so that the 100 control output is at a lower measurement value The Gain can then be adjusted to produce the desired gain Example of reverse acting control Add base to a solution at 8 0 pH to control the p...

Страница 67: ...point At setpoint the control output is 0 and if a non zero control output is needed to keep the PV at the setpoint proportional alone will only stabilize the measured variable at some offset deviation from the desired setpoint Bias is used to provide a constant control output at the setpoint to maintain PV at the setpoint The effect of Bias is expressed as follows Proportional Output Gain PV SP 1...

Страница 68: ...s increased If the PV overshoots the setpoint the reset action will decrease When the measurement reaches the setpoint and the proportional control action becomes zero there will be an accumulated integral control action to keep the process at the setpoint The controller configured with reset continues to change until there is no offset If the offset persists the reset action eventually drives the...

Страница 69: ...in behaviors which are due to such factors as mixing and reaction time response time of the process to control output changes and the characteristics of the final operator i e control values pumps heaters etc With these characteristics known initial control settings can be developed A good reference to PID control is provided by the book Control Loop Foundation Batch and Continuous Processes by Te...

Страница 70: ...ext to go to the PID Setup parameters 7 2 3 PID Setup Parameters The PID control setup window contains the PID control tuning parameters Also note that the upper portion of the screen shows the measurement chosen for control PV and the control output in mA and Output This makes it possible to observe the primary variable PV and the control output in terms of percent and milliamps while tuning PID ...

Страница 71: ...cts as an automatic bias which increases or decreases the overall control output in re sponse to the error PV SP to keep the PV at the setpoint Derivative Rate D range 0 to 3 000 seconds default 0 seconds Derivative action gives an immediate control output in response to changes in the proportional output with time derivative The amount of increase or decrease depends on the rate of change of the ...

Страница 72: ...port Time Fault Basic Definitions 1 Fault When a measurement fault occurs either sensor or transmitter the control output can be setup to continue providing a live control output or the output can be set to a fixed value If the live reading is used during a fault condition the control output could be based on an erroneous measurement which might cause problems Using a fixed value for control outpu...

Страница 73: ...me that a relay is on On Time during a user selected time period Time Period As the control output increases the on time increases The proportional integral and derivative are defined the same as analog PID control but use On Time instead of Output Proportional On Time Gain PV SP x 100 URV LRV BIAS Proportional and Integral Control On Time Gain 100 URV LRV PV SP 1 I Σ PVt SP Δt Derivative Mode On ...

Страница 74: ...be controlled Note This measurement can also be a 4 20 mA signal input brought in by the flow 4 20 mA board Select Next to go to the PID Setup parameters 8 2 2 TPC Setup Parameters The TPC setup window contains the PID control tuning parameters Also note that the upper portion of the screen shows the relay number and the value of the measurement assigned to it the On Time for the relay and the cur...

Страница 75: ...put is directly proportional to the difference between the process variable PV and the setpoint divided by the output span URV LRV Gain is a factor which multiplies the proportional output to meet the requirements of the process being controlled Using Gain values less than 1 reduce the proportional output while Gain values greater than 1 increase the proportional output Integral Reset I range 0 to...

Страница 76: ...Section 8 Time Proportional Control Instruction Manual April 2017 LIQ MAN 56 66 ...

Страница 77: ...tion alarms are setpoint alarms with adjustable deadband These operate as simple on off alarms used for applications requiring discrete on off control of pumps and valves Typical applications include demineralizer bed regeneration and blowdown in boilers and cooling towers Any active device variable in the 56 analyzer can be programmed as a high low concentration alarm including the primary or sec...

Страница 78: ...TER MENU 7 Select NEXT Press ENTER MENU to advance to the next setup screen 8 Normal state Set the normal alarm condition as Open or Closed and press ENTER MENU Program the normal state to define the desired alarm default state to nor mally open or normally closed upon power up See Appendix 1 HART and Device Variables 9 3 Delay Timer 9 3 1 Description Delay Timer is a concentration control scheme ...

Страница 79: ...ent when the process measurement reaches the entered setpoint value Press ENTER MENU See Table 9 2 for entry limits 6 Deadband To set deadband as a measurement value enter the change in the process value needed after the relay deactivates to return to normal and thereby preventing re peated alarm activation Press ENTER MENU 7 Select NEXT Press ENTER MENU to advance to the next setup screen 8 On ti...

Страница 80: ... level control make up water is added in proportion to the volume of blowdown material lost through dumping and evaporation A schematic of the Bleed and Feed timer operation is shown 9 4 2 Setup Access Bleed and Feed Timers by pressing ENTER MENU from the main screen and then Program Relays Configure Relay From the main relay programming screen program this feature as follows 1 Relay Assign relay ...

Страница 81: ... is displayed 12 Delay time Enter the time in minutes X X min after the Bleed time is activated before triggering this feed relay 13 Feed time equals Enter the percent of time that the Bleed timer is on X X to activate this feed relay for pumping make up water chemicals See Appendix 1 HART and Device Variables 9 5 Totalizer Based Relay Activation 9 5 1 Description A totalizer based timer feeds che...

Страница 82: ...al thousand gal million Gal trillion Gal 5 On time Enter the time in minutes X X min for the relay to remain energized The assigned measurement value will be on hold during this time 6 Normal state Set the normal alarm condition as Open or Closed and press ENTER MENU Program the normal state to define the desired alarm default state to normally open or normally closed upon power up 9 6 Interval Ti...

Страница 83: ...this time 5 Recovery time Enter the time in minutes XX min before the process is restored and live measurements can resume 6 Hold while active Select which sensors outputs should be on hold S1 S2 or both during the interval timer activation time Press ENTER MENU 7 Select NEXT Press ENTER MENU to advance to the next setup screen 8 Normal state Set the normal alarm condition as Open or Closed and pr...

Страница 84: ...e desired relay 1 4 and press ENTER MENU 2 Type Select Date and time timer as the relay type and press ENTER MENU 3 Select NEXT Press ENTER MENU to advance to the next setup screen 4 The Week 1 calendar will appear Program the start relay activate time by entering day s of week hour s of day and minutes for each hour Enter the duration of time in minutes XX min for relay activation Up to four rela...

Страница 85: ...zer to a laboratory instrument Contacting Conductivity Cal Sec 7 4 8 Zeroing an chlorine oxygen or ozone sensor Amperometric Cal Sec s 7 6 7 7 7 8 9 Calibrating an oxygen sensor in air Oxygen Cal Sec s 7 6 10 Calibrating the sensor to a sample of known concentration Amperometric Cal Sec s 7 6 7 7 7 8 11 Enter a manual reference temperature for temperature compensation of the process measurement 10...

Страница 86: ...ence off set value select Slope Offset and follow the step by step procedures displayed on screen 10 3 ORP Calibration For process control it is often important to make the measured ORP agree with the ORP of a standard solution During calibration the measured ORP is made equal to the ORP of a standard solution at a single point To calibrate the ORP loop with a connected ORP sensor access the Calib...

Страница 87: ...ductivity standards having conductivity greater than 100 µS cm The resistance of these solutions august be too low for an accurate measurement Calibrate sensors with 0 01 cm cell constant using method c c To calibrate a 0 01 cm sensor check it against a standard instrument and 0 01 cm sensor while both sensors are measuring water having a conductivity between 5 and 10 µS cm To avoid drift caused b...

Страница 88: ...y standard This section contains procedures for the first time use and for routine calibration of the 56 analyzer To calibrate the conductivity loop with a connected contacting conductivity sensor access the Calibration screen by pressing ENTER MENU from the main screen select S1 or S2 Measurement and press ENTER MENU Press INFO at any time to learn more about this procedure A yellow screen will a...

Страница 89: ...nsors even when no chlorine is in the sample generate a small current called the residual current The analyzer compensates for the residual current by subtracting it from the measured current before converting the result to a chlorine value New sensors require zeroing before being placed in service and sensors should be zeroed whenever the electrolyte solution is replaced To calibrate the chlorine...

Страница 90: ...ting it from the measured current before converting the result to a total chlorine value New sensors require zeroing before being placed in service and sensors should be zeroed whenever the electrolyte solution is replaced The best zero standard is deionized water The purpose of the In Process Calibration is to establish the slope of the calibration curve Because stable total chlorine standards do...

Страница 91: ... is replaced The best zero standard is deionized water The purpose of the In Process calibration is to establish the slope of the calibration curve Because stable monochloramine standards do not exist the sensor must be calibrated against a test run on a grab sample of the process liquid Several manufacturers offer portable test kits for this purpose To calibrate the chlorine sensor access the Cal...

Страница 92: ...ith the sensor attached follow the step by step procedures displayed on screen 2 To perform a Grab Calibration by Standardizing the sensor follow the step by step procedures displayed on screen 10 7 Calibration Oxygen Oxygen sensors generate a current directly proportional to the concentration of dissolved oxygen in the sample Calibrating the sensor requires exposing it to a solution containing no...

Страница 93: ...to make the calculationofsolubilityincommonunits likeppmDO simpler itisconvenienttousewater saturated air for calibration Automatic air calibration is standard The user simply exposes the sensor to water saturated air The analyzer monitors the sensor current When the current is stable the analyzer stores the current and measures the temperature using a temperature element inside the oxygen sensor ...

Страница 94: ... the residual current by subtracting it from the measured current before converting the result to an ozone value New sensors require zeroing before being placed in service and sensors should be zeroed whenever the electrolyte solution is replaced The best zero standard is deionized water The purpose of the In Process Calibration is to establish the slope of the calibration curve Because stable ozo...

Страница 95: ...ered 1 Temperature with manual temperature entry 2 To Calibrate Temperature follow the step by step procedures displayed on screen 10 10 Turbidity This section describes how to calibrate the turbidity sensor against a user prepared standard as a 2 point calibration with deionized water against a 20 NTU user prepared standard as a single point calibration and against a grab sample using a reference...

Страница 96: ...ensor access the Calibration screen by pressing ENTER MENU from the main screen select S1 or S2 Measurement and press ENTER MENU Press INFO at any time to learn more about this procedure A yellow screen will appear with detailed instructions and information The following calibration routine is covered 1 K Factor A constant value represent ing pulses Gal of flow 2 Frequency Velocity Pipe Alternate ...

Страница 97: ...evision of the DD Device Description and install files for AMS and DeltaV used should be the same as the Device Revision of the 56 HART 5 Device Identification 56 Revision 1 Manufacturer Name Rosemount Model Name 56 Manufacturer ID 46 0x2E Device Type Code 86 0x0056 HART Protocol Revision 5 1 Device Revision 1 Capabilities Supports all signal boards except the turbidity and flow 4 20mA input signa...

Страница 98: ...t output to a minimum value In both HART 5 and HART 7 Output Power should be set to External so that an external 24 VDC power supply can be used to power the multidrop bus 11 2 3 HART Configuration To access the HART Configuration screens press the HART button in the Main Menu The following controls are available HART Configuration Screen 1 Basic Definitions Host HART mode toggles between HART ver...

Страница 99: ...ntity information including device type revision level and device ID Response preambles Preambles synchronize the receiver to the incoming data Re sponse preambles are the number of bytes of preambles 2 to 20 sent by the 56 at the start of a response packet 11 3 Measurements Available via HART A number of live measurements are made available by HART in addition to the main measurements such as pH ...

Страница 100: ...t 6 Configuration Changed This bit is set when the last bytes of an EEPROM writing sequence is completed Since EEPROM writes are delayed until after the response the immediate acknowledgement will not have the bit set however after the EEPROM write completes the bit will be set This bit applies to all EEPROM writes whether or not they apply directly to the configuration of the instrument or not Th...

Страница 101: ...s diagnostic messages and provide a tool for configuring the measurement and calibrating the 56 Two examples are shown below 11 5 1 AMS Intelligent Device Manager The AMS Device Intelligent Device Manager is member of the AMS Suite of asset management applications which provides tools for configuration calibration diagnosing and documenting transmitters and valves The following AMS windows are exa...

Страница 102: ...tion 11 HART Communications Instruction Manual April 2017 LIQ MAN 56 92 HART Communications FIGURE 11 2 Device Variables and Dynamic Variables FIGURE 11 3 Diagnostic Messages Additional Transmitter Status ...

Страница 103: ...Instruction Manual Section 11 HART Communications LIQ MAN 56 April 2017 HART Communications 93 FIGURE 11 4 Configuration FIGURE 11 5 Calibration ...

Страница 104: ... or prohibitively expensive Although HART 5 or HART 7 can burst the Dynamic Variables PV SV TV QV HART 7 should be used with the THUM because up to 8 Device Variables can be continually burst using Command 9 11 7 Field Device Specification FDS For more details on the implementation of HART in the 56 and its command structure the Field Device Specification for the relevant Device Revision should be...

Страница 105: ...og and discrete functionality of the standard HART 56 transmitter The four 4 to 20 mA analog outputs can be configured as analog outputs or PID control outputs The four discrete relay outputs can be configured for concentration control high low alarms with or without a delay timer event based activation timer based activation or TPC Duty Cycle Pulse Width Modulation control 12 2 Profibus Features ...

Страница 106: ...include The two main measurements their units and the measurement The temperature measurements from each board and their units Dual conductivity measurements conductivity ration percent passage and percent rejection Dual flow board measurements flow recovery flow difference and flow unit Alarm relays 4 possible their type state logic assignment and simulate status Details of the module are in Sect...

Страница 107: ...e slave address of the 56 Some Profibus masters cannot set slave addresses and the slave addresses have to be set in each slave device If this is case the slave address can be set in the 56 by pressing the Enter Menu key and selecting DP Profibus which will launch the Profibus configuration window The Profibus address is writeable up to a value of 126 At the same time the slave address is being se...

Страница 108: ...ayed if Profibus cable diagnostics are enabled Cable shorted or open No Profibus cable is connected or the A and B leads of the cable are shorted Check Profibus Cable The A and B leads in the Profibus cable august be reversed If standard Profibus cable is used the green lead should be wired to position A and the red lead to position B The bus august not have a terminator or it august not be turned...

Страница 109: ...s being used by the 56 on the network Baud rate the baud rate of the 56 and the network Master detected If the master is not detected the host and analyzer are not commu nicating Check wiring connections make sure the addresses match and try changing the baud rate POST Lpf output Rx character count POST is the power on self test POST and the remaining parameters on this window are used as factory ...

Страница 110: ... PV type Table 12 4 Data Size Module Module Name Type Bytes Identifiers Signal Input Board 1 1 PV1 Value float 4 0x41 0x83 0x01 2 PV1 Unit uint 2 0x41 0x81 0x02 3 PV1 Type uchar 1 0x41 0x80 0x03 4 Temperature1 float 4 0x41 0x83 0x04 5 Temperature1 Unit uint 2 0x41 0x81 0x05 Signal Input Board 2 6 PV2 Value float 4 0x41 0x83 0x06 7 PV2 Unit uint 2 0x41 0x81 0x07 8 PV2 Type uchar 1 0x41 0x80 0x08 9 ...

Страница 111: ... GPH 1423 ppm 1424 ppb 1425 ppth 1521 ppb ppm 1522 ug L mg L 1523 None 1524 Oxygen in Gas 1525 ppm Oxygen in Gas 1526 NTU 1527 FTU 1528 FNU 1551 S cm 1552 µS cm 1555 M Ohm cm 1556 k Ohm cm 1558 mg L 1559 µg L 1560 Saturation Table 12 4 Measurement Unit Codes and Units Types Measurement 0 Unknown 1 pH 2 ORP 3 Redox 4 Ammonia 5 Fluoride 6 Custom ISE 7 Conductivity 8 Resistivity 9 NaOH 10 HCl 11 Low ...

Страница 112: ...har 1 0x41 0x80 0x1B 28 Alarm3 State uchar 1 0x41 0x80 0x1C 29 Alarm3 Logic uchar 1 0x41 0x80 0x1D 30 Alarm3 Assignment uchar 1 0x41 0x80 0x1E 31 Alarm3 Simulate Status uchar 1 0x41 0x80 0x1F Relay 4 32 Alarm4 Type uchar 1 0x41 0x80 0x20 33 Alarm4 State uchar 1 0x41 0x80 0x21 34 Alarm4 Logic uchar 1 0x41 0x80 0x22 35 Alarm4 Assignment uchar 1 0x41 0x80 0x23 36 Alarm4 Simulate Status uchar 1 0x41 0...

Страница 113: ...e 2 42 Temperature 4 44 Amperometric Sensor Current 7 47 Millivolt Input 9 49 Glass electrode Impedance 11 51 Reference Electrode Impedance 14 54 Raw Conductivity 15 55 Raw Resistivity 16 56 Turbidity 18 58 Flow Velocity 19 59 Totalized Flow 33 73 Free Ions Dual Sensor and Main Board Assignments 0 Main Board Temperature 201 Conductivity Ratio 202 Rejection Conductivity 203 Passage Conductivity 204...

Страница 114: ...tate 24 Main Board CPU Error The main board software is corrupted 1 Try to reset the analyzer by turning the power off then on again 2 Call the factory The main board must be replaced at the factory 25 Main Board User Data Error The main board user EEPROM data is corrupted 1 Try to reset the analyzer by turning the power off then on again 2 Reset the analyzer to factory default settings Go to main...

Страница 115: ...alyzer is causing the LCD to overheat reducing the operating life of the display The analyzer automatically begins reducing the brightness of the display at 55 C 131 F At 78 C 172 F analyzer turns off the display and stops storing data in the flash drive if one is installed At 85 C 185 F the analyzer turns off the analog current outputs At 90 C 194 F the analyzer turns off the relays As the temper...

Страница 116: ...nsor board on power up Sensor not communicating implies there is a bad connection between the sensor board and the main board or there is a bad component on the sensor board 1 Check ribbon cable connections at the main board and sensor board 2 Inspect the ribbon cable for damage and replace if necessary 3 Replace the sensor board 45 77 SN 1 2 CPU error Fault The sensor board software is corrupted ...

Страница 117: ...and check resistance between RTD in and RTD return wires It should be about 1100 ohm at room temperature 3 Replace sensor if RTD has failed Toroidal Conductivity Measurements The measured temperature is greater than 200 C 1 Check wiring 2 Disconnect sensor and check resistance between RTD in and RTD return wires It should be about 110 ohm at room temperature 3 Replace sensor if RTD has failed 106 ...

Страница 118: ...se the im pedance limit 3 Replace the sensor 53 85 SN 1 2 Broken Glass Fault Fault The sensing element in a pH sensor is a thin glass membrane In a good sensor the glass impedance is very high If the glass bulb breaks or cracks the impedance drops to a very low value and the broken glass fault appears Certain ion selective electrodes fluoride ammonia and ammonium also have high impedance sens ing ...

Страница 119: ...nalyzer makes a correction for small offsets in the sig nal that exist even when the conductance is zero If the difference between the measured conductance and the zero correction is less than 50 uS the negative reading warning appears 1 Repeat zero calibration Be sure the sensor is completely dry 2 Confirm that the sensor is completely submerged in the process liquid 113 145 SN 1 2 Out Of Range W...

Страница 120: ... The existing power supply is incorrect a the turbidity sensor Replace power supply 56 88 SN 1 2 Lamp Led Fail Fault The lamp or LED has failed 1 Try to reset the analyzer by turning the power off then on again 2 Replace the sensor 57 89 SN 1 2 Disconnected Fault The turbidity sensor cable is disconnected at either the sensor or the sensor board 1 Confirm that the cable is tightly connected to the...

Страница 121: ...closure farthest from the front of the door hinge as shown in the photo below 2 Secure the Profibus cable with a cable gland fittings and nut from the outside of the en closure to ensure a proper seal Note that the cable gland fittings PN 23554 00 Cable Gland Kit Quantity 5 do not require the securing nut inside the enclosure to properly install the fitting Simply thread the fitting into the groun...

Страница 122: ...properly prepared Unshielded wire leads can lead to poor signal integrity from the Profibus device to the Master 5 After wiring the Profibus cable to the terminal block slide the wired 4 lead terminal block onto the 4 pins protruding from Profibus board on the left side Photo shows the 4 lead terminal block properly wired to the Profibus board and installed onto the board Note the Profibus cable m...

Страница 123: ...rdous area RISK OF ELECTRICAL SHOCK Electrical installation must be in accordance with the National Electrical Code ANSI NFPA 70 and or any other applicable national or local codes CAUTION This symbol identifies a risk of electrical shock CAUTION This symbol identifies a potential hazard When this symbol appears consult the manual for appropriate action 13 2 Analyzer Maintenance Periodically clean...

Страница 124: ...Section 13 Maintenance Instruction Manual April 2017 LIQ MAN 56 114 ...

Страница 125: ...Letter of Transmittal see Warranty If possible pack the materials in the same manner as they were received 4 Send the package prepaid to Emerson 8200 Market Blvd Chanhassen MN 55317 RMA No ____________ Mark the package Returned for Repair Model No ___________ IMPORTANT Please see second section of Return of Materials Request form Compliance with the OSHA requirements is mandatory for the safety of...

Страница 126: ...Section 14 Return of Material Instruction Manual April 2017 LIQ MAN 56 116 ...

Страница 127: ...ride 5 Custom ISE 6 PV SV TV or QV 0 to 1000 ppm 0 to 1000 ppb 0 to 1000 mg L 0 to 1000 µg L 0 to 100 Measurement Parameters Sensor 1 2 Temperature PV SV TV or QV 15 to 200 C 5 to 360 F Sensor 1 2 Temperature resistance TV or QV 0 to 100000 ohm Sensor 1 2 mV input PV SV TV or QV 750 to 750 mV Sensor 1 2 Glass impedance PV SV TV or QV 0 to 2000 MΩ Sensor 1 2 Sensor impedance PV SV TV or QV 0 to 200...

Страница 128: ...ation NaOH 9 PV SV TV or QV 0 to 12 HCl 10 PV SV TV or QV 0 to 15 Low H2SO4 11 PV SV TV or QV 0 to 25 High H2SO4 12 PV SV TV or QV 96 to 99 7 NaCl 13 PV SV TV or QV 0 to 25 Custom Concentration 14 PV SV TV or QV 0 to 1000 ppm 0 to 1000 mg L 0 to 100 g L 0 to 100 0 to 1000 None TDS 15 PV SV TV or QV 0 to 10000 ppm Measurement Parameters Sensor 1 2 Temperature PV SV TV or QV 15 to 200 C 5 to 360 F S...

Страница 129: ...nsor 1 2 Temperature PV SV TV or QV 15 to 200 C 5 to 360 F Sensor 1 2 Temperature resistance TV or QV 0 to 100000 Ω Sensor 1 2 Sensor input current PV SV TV or QV 0 to 100000 nA Sensor 1 2 Polarizing voltage TV or QV 1000 to 1000 mV Sensor 1 2 Pressure TV or QV 0 to 5000 mmHg 0 to 200 inHg 0 to 7 bar 0 to 7000 mbar 0 to 700 kPa 0 to 7 atm Flow mA Input Device Variables Device Variable Name Assigna...

Страница 130: ... g L Turbidity FNU FTU NTU Measurement Parameters Sensor 1 2 Frequency TV or QV 0 to 1000 Hz Sensor 1 2 Velocity PV SV TV or QV 0 to 10 ft sec 0 to 10 m sec Sensor 1 2 Totalizer PV SV TV or QV 0 to 1000000 gal 0 to 1000000 liter 0 to 1000000 m3 0 to 1000000 cu ft Sensor 1 2 mA input TV or QV 3 6 to 22 mA Dual Flow Measurements Flow ratio PV SV TV or QV 0 to 1000 NA Flow ratio PV SV TV or QV 0 to 1...

Страница 131: ... Error Device Status bit 7 3 6 0 Sensor 2 Sensor Board Unknown Error Device Status bit 7 3 6 1 Sensor 2 Hardware Software Mismatch Error Device Status bit 7 3 6 2 Sensor 2 Sensor Incompatible Error Device Status bit 7 3 6 3 Sensor 2 Sensor Not Detected Error Device Status bit 7 3 6 4 Sensor 2 Sensor not communicating Error Device Status bit 7 3 6 5 Sensor 2 CPU Error Error Device Status bit 7 3 6 ...

Страница 132: ...tatus bit 4 24 1 Sensor 1 Calibration in Progress Mode Device Status bit 4 24 2 Sensor 1 Standardization in Progress Mode Device Status bit 4 24 3 Sensor 1 Stabilization in Progress Mode Device Status bit 4 25 0 Sensor 2 Zeroing in Progress Mode Device Status bit 4 25 1 Sensor 2 Calibration in Progress Mode Device Status bit 4 25 2 Sensor 2 Standardization in Progress Mode Device Status bit 4 25 3...

Страница 133: ...Sensor 1 Slope Error Mode Device Status bit 4 24 Extended Device Status bit 0 25 6 Sensor 2 Offset Error Mode Device Status bit 4 Extended Device Status bit 0 25 7 Sensor 2 Slope Error Mode Device Status bit 4 Extended Device Status bit 0 Contacting and Toroidal Conductivity Status Bits Byte Bit Message Severity Device Status Bits Set 16 0 Sensor 1 Conductivity Negative Reading Warning Device Stat...

Страница 134: ...16 6 Sensor 1 Negative Current Warning Device Status bit 4 16 7 Sensor 1 Excessive Current Warning Device Status bit 4 18 0 Sensor 2 Low Current Warning Device Status bit 4 19 5 Sensor 2 No Flow Detected Warning Device Status bit 4 19 6 Sensor 2 Negative Current Warning Device Status bit 4 19 7 Sensor 2 Excessive Current Warning Device Status bit 4 Turbidity Input Status Bits Byte Bit Message Seve...

Страница 135: ...Instruction Manual EC Declaration LIQ MAN 56 April 2017 EC Declaration 125 Note Please see website for most recent Declaration ...

Страница 136: ...tion are presented for information purposes only and while effort has been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability All sales are governed by our terms and conditions which are available on request We reserve the right to modify or improve the designs o...

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