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77

Maintenance

Figure 20

CPU Board

9.4.1 Fuse Removal and Inspection

To remove a fuse, pull it straight out of the clips that hold it in place. Usually a close look
will tell you if a fuse is blown. The wire strand inside the glass tube will be broken.
Occasionally it may take an ohmmeter to verify if a fuse is good or not. You may need to
remove plug J1 to access fuse F1.

Always replace any fuse with the exact same size and type rating. Over-rating or
bypassing a fuse could lead to severely damaged equipment.

Table 32 CPU Board Fuse

ID

Description

Type & Rating

F1

RS485 Interface Connector

2 Amp, 250 V ac Fast-blow, 5 x 20 mm (P/N 2605)

Table 33 CPU Board Connectors

ID

Description

J1

Liquid Crystal Display (LCD) Board

J2

Mechanical Totalizer

J3

not used

J4

Base Board

J5

Memory Backup Battery Pack

J6

RS232 Serial Port

J7

RS-485 - Submerged Pressure Probe - (not used on bubbler 950)

J8

Modem Option Module

J9

Liquid Crystal Display (LED back-light)

J10

Keypad

J11

not used

J6

J10

J9

J4

J11

J5

J2

J8

J7

F1

J1

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Содержание Sigma 950

Страница 1: ...Catalog Number 3314 Sigma 950 Flow Meter INSTRUMENT MANUAL Hach Company 2002 2004 2008 All rights reserved Printed in the U S A sp dk 11 08 5ed...

Страница 2: ......

Страница 3: ...Power Up of Meter 25 5 2 Basic Programming 25 Section 6 Sensor Installation 33 6 1 Downlooking Ultrasonic Depth Sensor 33 6 1 1 Downlooking Ultrasonic Depth Sensor Connection 33 6 1 2 Downlooking Ultr...

Страница 4: ...xygen Probe Connection 52 7 4 2 Dissolved Oxygen Probe Programming 52 7 4 3 Dissolved Oxygen Probe Temperature Programming 53 7 4 4 Dissolved Oxygen Probe Calibration 53 7 5 Conductivity Probe 54 7 5...

Страница 5: ...Removing the Front Panel 73 9 2 3 Re Installing the Front Panel 74 9 3 Circuit Board Identification 75 9 4 Fuse and Connector Locations 75 9 4 1 Fuse Removal and Inspection 77 9 4 2 Working with Wirin...

Страница 6: ...4...

Страница 7: ...002 96 EC European electrical equipment users must now return old or end of life equipment to the Producer for disposal at no charge to the user Note For return for recycling please contact the equipm...

Страница 8: ...s effectuer dans le respect des consignes des sch mas de contr le du fabricant Toute modification apport e aux machines ou tout d placement de celles ci est d conseill car susceptible de provoquer des...

Страница 9: ...nt is connected to their lines inform them of a The telephone number that this unit is connected to b The ringer equivalence number 1 4B c The USOC jack required RJ11C and d The FCC Registration Numbe...

Страница 10: ...ctrique appropri e selon le cas The Load Number LN assigned to each terminal device denotes the percentage of the total load to be connected to a telephone loop which is used by the device to prevent...

Страница 11: ...annels Flow Nozzle California Pipe Head vs Flow Custom programmable curve of up to 100 points Level only Inches feet centimeters meters Area Velocity Level area table Circular pipe U shaped channel Tr...

Страница 12: ...resistant polypropylene body Measurement Range 10 to 100 mS cm Resolution 0 01 mS cm or 1 mS cm Accuracy 1 of reading 0 05 mS cm Operating Temperature 0 to 50 C 32 to 122 F Dimensions 17 mm 12 7 cm 0...

Страница 13: ...0 32 cm 1 8 in ID standard Line Lengths 160 m 500 ft maximum Submerged Depth Only Sensor Accuracy 0 1 full scale Non linearity and dysteresis Range P N 2963 0 to 1 75 m 2 5 psi 0 to 5 75 ft Ambient O...

Страница 14: ...F Temperature Error 0 000047 ft F maximum error within compensated temperature range per degree of change Resolution 0 0011 ft Material PVC housing with Buna N acoustical window Cable 4 conductor wit...

Страница 15: ...Class I Zone I Groups A B C D Canada Class I Division I Groups A B C D Class II Division I Groups E F G Resolution 0 3 cms 0 01 fps Response Time 4 8 seconds Profile Time 4 8 seconds Probe Dimensions...

Страница 16: ...ee of change Velocity Induced Error on Depth patent pending 0 to 3 05 m sec 0 to 10 ft sec 0 085 of reading Air Intake Atmospheric pressure reference is desiccant protected Velocity Measurement Method...

Страница 17: ...ntrolling external devices with four Normally Open Normally Closed relays and controlling external devices with two 4 20 mA current outputs Communication capabilities include a standard RS232 port and...

Страница 18: ...down the list of choices When the desired choice is highlighted press the SELECT soft key to choose that item 4 Status bar The appearance of the status bar changes depending upon the function being pe...

Страница 19: ...without opening the cover The 950 Flow Meter is optimized for portable battery powered use Its unique power saving modes conserve battery resources by putting the meter to sleep during any period of...

Страница 20: ...18 Introduction...

Страница 21: ...mente cualificadas GEFAHR Einige der folgenden Abschnitte dieses Handbuchs enthalten Informationen in Form von Warnungen Vorsichtsma nahmen oder Anmerkungen die besonders beachtet werden m ssen Lesen...

Страница 22: ...r requires the optional Wall Mounting Bracket P N 2743 This bracket provides stable secure mounting for the flow meter and provides clearance for removing the power supply while the unit is installed...

Страница 23: ...weight of a 950 Flow Meter and will not adequately support additional weight 4 3 3 Manhole Rung Hanger Optional The Manhole Rung Hanger P N 3533 is a convenient way to hang the 950 Flow Meter from a m...

Страница 24: ...e flow meter See Figure 4 2 Pull the two rubber hold down clamps up and over the clips on each end of the power supply 3 Connect the power supply connector to the port labeled 12 V dc on the top left...

Страница 25: ...e battery or vehicle cigarette lighter connection Refer to Batteries and Chargers on page 125 for more information Although the 950 Flow Meter will operate on any attached 12 V dc power supply the ins...

Страница 26: ...may receive power from an external device 500 mA max load Pin B provides the ground line that is used in conjunction with the other signals on the connector 12 V dc w battery to 17 V dc pulse w ac po...

Страница 27: ...asic Programming Note To make changes to the program entries after the basic programming setup press the MAIN MENU key and select SETUP MODIFY SELECTED ITEMS Highlight the program entry using the up a...

Страница 28: ...01 Main Menu LOGIN MODIFY ALL ITEMS REVIEW ALL ITEMS MODIFY SELECTED ITEMS READY TO START 11 00 AM 21 APR 01 FLOW UNITS ACCEPT CHANGE CHOICE FLOW UNITS mdg CANCEL SELECT APPROPRIATE UNITS Table 4 Flow...

Страница 29: ...me Parshall Trapezoidal H type HL type HS type Leopold Lagco Palmer Bowlus See Table 8 Nozzle California pipe Power Equation Enter variables K1 K2 n1 and n2 K1 0 9999 99 K2 0 9999 99 n1 and n2 1 9 99...

Страница 30: ...Angle of notch in degrees 22 5 to 120 Compound V Notch Angle of notch in degrees 22 5 120 notch depth in inches rectangular width in inches 0 120 in or 0 304 cm Contracted or non contracted Table 8 Fl...

Страница 31: ...ft key Total flow units of measure are used whenever a total flow unit is displayed or logged 8 C Press ACCEPT to continue to velocity direction Step 9 Velocity Direction only when logging velocity 9...

Страница 32: ...fps If the velocity falls below 0 20 fps the meter will store a value of 0 20 fps until the velocity increases above 0 20 fps 5 3 Starting and Stopping Programs Note When selecting START FROM BEGINNI...

Страница 33: ...ted It continues with the last logged value when restarted 4 20 mA outputs remain unchanged Sampler control is disabled Alarm checking is disabled Program is Complete or Ready to Start No data logging...

Страница 34: ...32 Basic Programming Setup...

Страница 35: ...te Ultrasonic factory installed Option is available P N 3170 which allows for the extension of the ultrasonic sensor cable see Figure 5 6 1 2 Downlooking Ultrasonic Depth Sensor Programming The downlo...

Страница 36: ...pipe the entire depth typically contributes to flow In a weir only the depth that is flowing over the weir plate contributes to flow Many flumes have specific requirements refer to Working with Primar...

Страница 37: ...quid behind the weir is level with the bottom of the V There would still be liquid behind the weir plate but it would not be contributing to flow Sensor Height calibration is generally used when acces...

Страница 38: ...m of the channel This may cause false echoes from the sides of the channel walls 6 2 4 Calibrating the In Pipe Zero Deadband Ultrasonic Depth Sensor Calibrate the in pipe sensor each time the sensor i...

Страница 39: ...ensation for the internal deadband in the sensor housing Measurement uncertainty increases to 1 07 cm 0 035 ft for a 30 cm 1 ft change in level from the calibration point Use this method only if the L...

Страница 40: ...mended that the conduit be 1 inch or larger 6 3 2 Junction Box Connection Procedure Connect the bare leads to the flow meter using a junction box P N 4730 This junction box is a physical connection po...

Страница 41: ...he top tubing nipple on the desiccant canister and the brass tubing nipple on the junction box 7 Connect the short connector terminated cable to the velocity connector on the flow meter Figure 7 Junct...

Страница 42: ...Submerged Area Velocity Sensor Calibration Note The data is constant if the difference between the level reading of the flow meter and the independent verification is constant recalibration is not re...

Страница 43: ...tinue 7 Highlight Velocity Cutoff using the UP and DOWN soft keys Press SELECT to continue 8 Read the Velocity Cutoff information screen Press any key to continue 9 Set the Velocity Cutoff using the k...

Страница 44: ...d Whenever a sensor is replaced with another sensor Every 6 months Submerged depth only sensor calibration requires a graduated cylinder or bucket with at least 16 cm 6 in of water and a ruler Calibra...

Страница 45: ...fully measure the depth D1 from the surface of the water to the first weld mark that encircles the sensor body just above the breather vent holes Figure 9 The weld mark indicates the location of the i...

Страница 46: ...el After measuring the level the 950 microprocessor converts the level reading to a flow rate based on the user defined characteristics of a primary device 6 6 1 Bubbler Connections Note Note To conne...

Страница 47: ...ler Line Port The bubbler line connects from this port to the measurement point in the primary device Push the 1 8 3 17 mm ID vinyl bubbler tubing over the brass barbed fitting No clamps are required...

Страница 48: ...nverts the pressure in the bubble line to a voltage that is read by the microprocessor Recalibrate the sensor at least once per year to ensure optimum accuracy When selecting Bubbler from the calibrat...

Страница 49: ...ration See Figure 1 on page 16 4 Select CALIBRATE BUBBLER from the Bubbler Calibration menu Carefully measure the depth of the bubbler line with a ruler Measure from the surface of the water to the bo...

Страница 50: ...48 Sensor Installation...

Страница 51: ...hen press SELECT Note If logging is enabled on any channel that channel will have an arrow in front of the channel name to signify that the channel is logged 3 Highlight Rainfall using the UP and DOWN...

Страница 52: ...ress SELECT 3 Press CHANGE CHOICE to cycle between Logged and Not Logged then press ACCEPT 4 Enter a logging interval using the numeric keypad then press ACCEPT Valid logging intervals are shown on th...

Страница 53: ...at fails try a different pH probe 7 3 ORP Probe 7 3 1 ORP Probe Connection Note There is no temperature sensor on the ORP sensor The ORP probe consists of three wires a clear wire a black wire and a r...

Страница 54: ...DO Conductivity option is available with or without additional analog inputs See Analog Communications on page 64 for wiring and configuration 7 4 1 Dissolved Oxygen Probe Connection The pre amp P N...

Страница 55: ...ed 1 Connect a suitable power supply to the flow meter 2 Power up the unit by pressing the ON button 3 From the Main Menu select OPTIONS ADVANCED OPTIONS CALIBRATION DO 4 Enter the ambient air tempera...

Страница 56: ...to back up one step Press the MAIN MENU function key to return to the Main Menu 7 5 3 Conductivity Temperature Programming Note Conductivity measurements are only temperature compensated if the condu...

Страница 57: ...91 C Typical Wastewater 1 97 C Potassium Chloride 2 12 C Salt Sodium Chloride 2 84 C 98 Sulfuric Acid 4 55 C Ultra pure Water 6 With the sensor still in the calibration solution press any key Wait for...

Страница 58: ...Entered Solution Temp C Calibration Value to be Entered 30 1 099 25 1 000 20 0 902 29 8 1 095 24 8 0 996 19 8 0 898 29 6 1 091 24 6 0 992 19 6 0 894 29 4 1 087 24 4 0 988 19 4 0 890 29 2 1 083 24 2 0...

Страница 59: ...also use Supervisory Control and Data Acquisition SCADA Modbus communications protocol with the RS232 interface or Modem as described later in this section Figure 12 Communication Capabilities 8 1 RS...

Страница 60: ...ate 1 From the Main Menu select OPTIONS ADVANCED OPTIONS COMMUNICATIONS SETUP RS232 SETUP 2 Press CHANGE CHOICE to select a baud rate for data communications 1200 2400 4800 9600 or 19200 baud The high...

Страница 61: ...3188 can also be provided for modular connection if desired Figure 14 Figure 14 RJ11 Style Modular Connector Adaptor With Cover Removed 8 2 2 Modem Programming 1 From the Main Menu select OPTIONS ADVA...

Страница 62: ...nus see above To have the 950 Flow Meter call a pager the Pager Option must be enabled Pager reporting uses the industry standard Telelocator Alphanumeric Protocol TAP to deliver information up to thr...

Страница 63: ...ese numbers are usually provided when the pager is purchased Press ACCEPT 8 2 3 2 Reporting Devices You have the choice of which communication devices will report and in what order Choices are MODEM O...

Страница 64: ...low Low Slate Memory 3 Less than 10 slate memory left Slate Memory Full 4 Slate memory is used up 6 Reserved for Sampler 7 Reserved for Sampler 8 Reserved for Sampler 9 Reserved for Sampler U Sonic Ec...

Страница 65: ...eference Temperature 31 High Velocity 32 High D O 33 High D O Temp 34 High Conductivity 35 High Conductivity Temp 36 Low Level 37 Low Flow 38 Low pH ORP 39 Low Process Temp 40 Low CH1 41 Low CH2 42 Lo...

Страница 66: ...flow meter Battery power is not sufficient to support the 4 20 mA current loop power requirements The 4 20 mA option is available as one or two current loop interfaces for controlling external devices...

Страница 67: ...s displayed press ACCEPT 6 Assign a channel value to the 4 mA current value This value is typically 0 however any value can be set In other words enter the value of the input needed to generate 4 mA o...

Страница 68: ...s ACCEPT 4 Select the output A or B to calibrate 5 Press any key to set the selected output to 4 00 mA dc 6 Measure the current on the selected output using the multimeter and enter the measured value...

Страница 69: ...ced Options menu 2 Highlight SELECT INPUTS using the UP and DOWN keys Press SELECT Note A channel with logging enabled will have an arrow in front of it to signify that the channel is logged 3 Highlig...

Страница 70: ...l to log Channel 4 using the UP and DOWN soft keys then press SELECT 4 Press CHANGE CHOICE to select Logged then press ACCEPT 5 Enter a 1 minute logging interval using the numeric keypad then press AC...

Страница 71: ...and its cause Table 28 Relay 3 4 Connector Pin Assignments Pin Signal Description Wire Color A relay 3 N O normally open green B relay 3 common black C relay 3 N C normally closed white D relay 4 N O...

Страница 72: ...evice is defined as area velocity 4 Enable one of the alarm conditions level flow rate of change rainfall DO Conductivity Flow pH or Analog Channels 1 7 5 Select an action to occur when the alarm is a...

Страница 73: ...n Form von Warnungen Vorsichtsma nahmen oder Anmerkungen die besonders beachtet werden m ssen Lesen und befolgen Sie diese Instruktionen aufmerksam um Verletzungen von Personen oder Sch den am Ger t z...

Страница 74: ...n If the beads do not turn blue replace them with new desiccant 9 1 3 3 Maintaining the Hydrophobic Membrane When checking or changing the desiccant in the external desiccant cartridge check the white...

Страница 75: ...face connectors if so equipped Internal desiccant module RAM memory batteries Bubbler Module System upgrades or enhancements 4 20 mA modem alarm relays etc Circuit board repair 9 2 2 Removing the Fron...

Страница 76: ...nd tighten the screws in the sequence shown in Figure 18 on page 75 until the head of each screw makes contact with the front panel 2 Tighten screws in sequence shown in Figure 18 on page 75 to 5 in l...

Страница 77: ...e Base Board and the CPU Board The CPU board is located on the front panel assembly and the Base Board is located inside the back section of the case In addition a liquid crystal display LCD circuit b...

Страница 78: ...x 20 mm P N 2604 F3 Analog Input Option Interface connector if so equipped Pin A 12 V dc Pin B ground 1 Amp 250 V ac Fast blow 5 x 20 mm P N 2536 Table 31 Base Board Connectors ID Description J1 12 V...

Страница 79: ...the exact same size and type rating Over rating or bypassing a fuse could lead to severely damaged equipment Table 32 CPU Board Fuse ID Description Type Rating F1 RS485 Interface Connector 2 Amp 250...

Страница 80: ...the desiccant door in place and remove the door Figure 21 2 Slide out the old desiccant module and slide in a fresh one 3 Reattach the desiccant door The desiccant module cannot be recharged by heatin...

Страница 81: ...s consist of two 1 5 V dc C cells They are located below and behind the CPU circuit board which is attached to the inside of the front panel assembly They are easily replaced without having to remove...

Страница 82: ...80 Maintenance...

Страница 83: ...81 Appendix A Program Flow Charts Figure 22 Overview of Basic Program Menus...

Страница 84: ...82 Program Flow Charts Figure 23 Setup Flow Chart...

Страница 85: ...83 Program Flow Charts Figure 24 Options Flow Chart...

Страница 86: ...84 Program Flow Charts Figure 25 Alarms Menus Flow Chart...

Страница 87: ...85 Program Flow Charts Figure 26 Calibration Menus Flow Chart Page 1...

Страница 88: ...86 Program Flow Charts...

Страница 89: ...y portion of the 24 hour period for finer detail or center the graph on a specific point in time B 3 Selecting the Channel Note Only the channels for which logging has been enabled will be listed 1 Pr...

Страница 90: ...ble 35 Graphing Functions and Descriptions Functions Description Status Bar Displays the time date measured value and unit of measure at the intersection of the data cursor Placing the cursor s data o...

Страница 91: ...TIME DATE Starting with the hours and minutes use the numeric keypad to enter numbers in the flashing cursor Use the keys to toggle between 12 hour and 24 hour formats Use the soft keys on the right...

Страница 92: ...wise you must log flow in order to implement an alarm on a flow rate of change If you forget you are reminded when the program begins In the pH example Figure 27 the deadband is set to 0 10 pH When th...

Страница 93: ...logs the readings from all enabled input channels performs any other necessary duties required and then goes back to sleep This mode will give the longest battery life but the least resolution If you...

Страница 94: ...onger logging intervals result in a longer total recording time Lower resolution also occurs since more averaging is done at higher logging intervals Choose the shortest logging interval possible whil...

Страница 95: ...keys Press SELECT 3 Highlight the channel to log using the UP and DOWN soft keys Certain channels require more information 4 Press CHANGE CHOICE to select Logged or Not Logged Press ACCEPT 5 Enter a l...

Страница 96: ...lack dots A message THE DISPLAY WILL REMAIN INVERTED FOR 3 SECONDS is shown for 2 seconds followed by a 3 second period with all dots turned on B 15 3 Demonstration Graph The demonstration graph provi...

Страница 97: ...eric counters that keep track of the total flow being measured Two software totalizers are standard a third mechanical totalizer is available as an option The two software totalizers consist of a rese...

Страница 98: ...ers This selection is independent of the flow units selected in the Setup Menu Press CHANGE CHOICE to cycle through the available choices then press ACCEPT to continue Reset Totalizer Selecting RESET...

Страница 99: ...n the Advanced Options Menu using the UP and DOWN arrow soft keys then press SELECT 2 Press CHANGE CHOICE to select a new Screen Saver Mode Enabled or Disabled Press ACCEPT to save the changes B 20 Se...

Страница 100: ...is monitored with an optional Rain Gauge A connection is then made from the flow meter Sampler Interface to an automatic liquid sampler A typical stormwater program might be configured to activate wh...

Страница 101: ...on must be met for the program to begin 6 Enter the Start Condition limits For Rain enter the amount of rainfall and the time period within which it must fall For Level enter the level limit For Rain...

Страница 102: ...100 Programming Features...

Страница 103: ...rations are provided as a general guide to proper head measurement locations in commonly used primary devices Please contact the manufacturer of your primary device for detail Figure 28 Parshall Flume...

Страница 104: ...102 Primary Devices Head Measurement Locations Figure 30 Leopold Lagco Flume s Head Measurement Location Figure 31 Flume s Head Measurement Location...

Страница 105: ...103 Primary Devices Head Measurement Locations Figure 32 Weir s Head Measurement Location Figure 33 Probe and Band Orientation in a Round Pipe...

Страница 106: ...104 Primary Devices Head Measurement Locations...

Страница 107: ...ALL ITEMS 1 Select FLOW unit of measure gps gpm gph lps lpm lph mgd afd cfs cfm cfh cfd cms cmm cmh cmd __________ 2 Select LEVEL unit of measure cm m in ft __________ 3 Select a PRIMARY DEVICE ______...

Страница 108: ...ANCED OPTIONS 1 Setup 4 20 ma Outputs if desired __________ 2 Setup ALARMS if desired __________ 3 Calibrate inputs as needed __________chk 4 Communications Setup If modem is enabled ACCEPT any baud r...

Страница 109: ...sampler based on one of the following conditions Channel Name Analog Channel Signal Description Logged Y N Units Logging Interval min Process Temperature Rainfall pH Level Flow Analog Channel 1 Analo...

Страница 110: ..._______ Rain Level Rain Level Rain or Level Rain Trigger _________________ Rain Time Limit _______________ Level Trigger__________________ Check one ____ Head Vs Flow Worksheet ____ Level Vs Area Work...

Страница 111: ...n initiate queries to a slave 950 The 950 will always be considered the slave never a master The master can address individual 950 Flow Meters or can broadcast a message to instruments within its scop...

Страница 112: ...lude channel register addresses the number of registers to read and the actual byte count in the data field For example if a master requests that the flow meter read the current status of a group of c...

Страница 113: ...thin the predefined function codes of the Modbus ASCII protocol the data fields are subject to interpretation by the device manufacturer For example the 950 Flow Meter places temperature information i...

Страница 114: ...Measure Read Holding Register Addresses1 Name Type Size bits of Registers Start Address Hi Start Address Lo Registers Temperature Integer 16 1 00 31 40050 Rainfall Integer 16 1 00 32 40051 pH or ORP I...

Страница 115: ...LPM 28 GAL 4 LPH 29 L 5 MGD 30 M3 6 PH 31 IN 7 ORP 32 CM 8 PPM 33 FT 9 PPB 34 M 10 MGL 35 CM2 11 PCTSAT 36 FT2 12 MSIEMENS 37 IN2 13 MICROSIEMENS 38 M2 14 GRAMSPERKG 39 AFD 15 PCTPERDEGC 40 CFS 16 DEG...

Страница 116: ...ASCII this is one half the actual count of ASCII characters transmitted in the data portion of the response The contents of 40007 are shown as two byte values of 00 00 hex and the contents of register...

Страница 117: ...ompact 984 PLC All current models of Modicon PLCs including the Compact 984 pack two bytes of data into each register This alone presents no problems Unsigned two byte 16 bit integer values in the ran...

Страница 118: ...n it Depending on the manufacturer the user may be able to configure each of these ports for different communications parameters In essence not only does this type of port expander allow multiple slav...

Страница 119: ...y to a request to read the data stored in both registers 40009 AND 40010 Consequently if the meter received a single request to read both Level 40007 40008 and Velocity 40009 40010 the request would h...

Страница 120: ...polling for Level and it appears that you are getting the data for Velocity instead you probably are polling the wrong registers Response Check the data format of the Modbus server When configuring a...

Страница 121: ...xisting protocol to Modbus ASCII No Continued on sheet 2 Is this the first time this meter has ever been used with Modbus Yes Has the meter worked with Modbus before No No Turn the 950 off and then tu...

Страница 122: ...he 950 Configure the Master device that is communicating with the 950 to keep the DTR Pin C of the flow meter constantly held high for the duration of all communications No Yes This section does not a...

Страница 123: ...Floating point data requires 2 registers per value Enumerated and Integer data requires 1 register per value Long integers require two registers per value The meter would ignore a request for just on...

Страница 124: ...media Correct problem and then check for response again Does the Modbus message start with a colon and end with a Carriage Return and Line Feed pair Does the message address match the Modbus device ad...

Страница 125: ...needed Change the baud rate in either the 950 or the Modbus server so that both are set to the same baud rate No Are the integer values for Units Of Measure being returned correctly Use either a proto...

Страница 126: ...124 SCADA Modbus System Guidelines...

Страница 127: ...indicating the battery is charging The battery is fully charged when the LED indicator turns off Temperature At higher temperatures the electrical capacity that can be taken out of a battery increases...

Страница 128: ...to restore its full capacity F 3 Alkaline Lantern Battery Pack The Alkaline Lantern Battery Pack P N 3893 allows customers who are doing long term flow studies or multi site flow studies to use a dis...

Страница 129: ...If the voltage drops to 10 5 V dc or lower the meter may shut itself down and complete the program to protect stored data Steady Flow In conjunction with cold temperatures constant flow in a seasonal...

Страница 130: ...ata Transfer Unit The frequency at which the meter gets downloaded will also affect battery life During an RS232 download to a Data Transfer Unit the meter must power up to retrieve the data from memo...

Страница 131: ...efore checking the voltage Replace the battery if the voltage of the battery drops below 12 to 12 5 V dc within an hour Modem is operating Check to see if the unit is using a modem Flow Meters with a...

Страница 132: ...and is causing a blockage in the reference port Replace with new desiccant The desiccant is blue and no change in depth readings Remove the tube connecting the desiccant cartridge to the reference po...

Страница 133: ...upstream Eddies and waves returning flow back into the pipe could be causing incorrect velocities The invert has an unusual construction such as a rounded section in the middle of the invert or drops...

Страница 134: ...he Ultrasonic Transducer Transducer is not connected Check the ultrasonic sensor connection on the flow meter Cut or broken cable Check for any knick or cuts in the cable Unusual temperature or inabil...

Страница 135: ...e sensor is not covered with water Make sure the sensor is in water Not enough suspended solids Throw dirt into the water upstream of the sensor to reset the sensor The beveled face of the sensor is c...

Страница 136: ...nals Manipulate electrode cable and connections to check for intermittent continuity Replace as necessary Ground loop problem Check to see if the ground wire is connected properly at the pre amp junct...

Страница 137: ...ommon drainage tile 0 011 0 013 0 017 Vitrified sewer 0 011 0 014 0 017 Vitrified sewer with manholes inlets etc 0 013 0 015 0 017 Brick Glazed 0 011 0 013 0 015 Lined with cement 0 012 0 015 0 017 Co...

Страница 138: ...ned creosoted 0 011 0 012 0 015 Unplaned 0 011 0 013 0 015 Plank with battens 0 012 0 015 0 018 Brick Glazed 0 011 0 013 0 015 In cement mortar 0 012 0 015 0 018 Masonry Cemented Rubble 0 017 0 025 0...

Страница 139: ...137 Appendix I Engineering Drawings Submerged Flow Meter 2717 12 V dc RS232 Sampler Sub Probe 2549 2 SE 229 2679 2859 2547 2550 2548 2726 2662...

Страница 140: ...trasonic 2662 2975 Connect to J7 on 3096 CPU P C B Connect to J4 and J5 Red to J4 1 Green to J4 2 Yellow to J5 1 Black to J5 2 5357 Ultrasonic PCB 2729 5357 SE 340 4 2550 2548 Black to J3 2 Red to J3...

Страница 141: ...950 Flow Meter Area Velocity 1 of 2 12 V dc RS232 Sampler 2717 2662 2550 2437 1162 4 3187 Connect to J7 on the 3096 CPU P C B Connect to J2 on the 2437 Area Velocity P C B 3246 2548 SE 309 4 5357 SE...

Страница 142: ...140 Engineering Drawings 950 Flow Meter Area Velocity 2 of 2 2548 2550 2662 2549 2 8915 2547 2859 SE 229 4 3498 Orient with key down...

Страница 143: ...Engineering Drawings 950 Flow Meter Bubbler Assembly 2740 2 2715 2 5253 2 81044 5 5 in 81044 2 6 in 5027 2 SE 310 4 5057 2 2859 SE 229 4 3057 4628 2549 2 8915 2547 SE 810 2766 2548 2770 2662 2732 4 2...

Страница 144: ...ngs 950 Flow Meter Optiflow Assembly 2860 2654 SE 229 2556 2555 2549 4 2656 2547 2 2859 2 2655 2995 18 SE 251 4 1593 2 2552 2756 3699 3699 SE 310 4 2647 2 2732 4 3098 3098 3701 SE 340 4 2550 2 2548 2...

Страница 145: ...gineering Drawings 950 Flow Meter Bubbler Final Assembly 2717 12 V dc RS232 Sampler 4628 81044 2 6 in 5027 81044 5 5 in 2740 2 2715 2 5253 2 SE 310 4 5057 2 2724 SE 340 4 2665 2662 2732 4 SE 810 2 276...

Страница 146: ...wings 950 Flow Meter Base Assembly 2860 2654 SE 229 2556 2555 2549 4 2656 2547 2 2859 2 2655 2995 18 SE 251 4 1593 2 2552 2756 3699 3699 SE 310 4 2647 2 2732 4 3098 3098 3701 SE 340 4 2550 2 2548 2 78...

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