Forbes Monec 8964 Manual
Contents
1. TRANSMITTER RECEIVER p OUTPUT KEYBOARD AD CONVERTOR a 4 20 mA AMPLIFIER SYNCHRONOUS GAIN CONTROL DETECTOR 6 _ Aes OSCILLATOR G 1 OR 1 100 AMPLIFIER IMPEDENCE MATCHER G 10R10 Pt 100 FIG 1 BLOCK DIAGRAM 2 Getting Started 2 1 Included Items When you unpack the carton use the following checklist to make sure that all of these critical components are present 1 2 3 Transmitter 1 no Instruction Manual 1 copy 2 NB Pipe mounting kit consisting of l Pipe mounting bracket integral with transmitter 1 no Il M6 x 20 L bolts 4 nos Used to fit bracket Ill M6 spring washers With transmitter 4 nos IV M6 hex nuts 4 nos V U clamps 2 nos VI M8 hex nuts Integral with 4 nos each other VII BSW washers 4 nos 2 2 What You Need 1 JORU 3 digit multimeter pH RTD calibrator Screw driver blade width 6 mm Instrument screw driver blade width 3 mm Spanner for M6 nuts Spanner for M8 nuts Spanner for 25A F for cable glands 2 3 Mounting The transmitter can be mounted either on wall or on a 2 NB pipe 2 3 1 Wall mounting The casting has 4 holes in four corners as shown in FIG 2 1 The transmitter can be installed in sequence as follows Since unit has factory fitted wall mounting bracket it needs to removed for mounting on external wall Drill 7 MM through holes in the suitable plate on which the transmitter is to be mounted Hold the unit flat on2. www forbesmarshall com spirax D A Nacharam Hyderabad 500 076 Tel 040 27152276 27170732 27171909 27153918 Fax 040 27173235 27179223 27152193 Email saleshyd satyam net in saleshyd sancharnet in DELHI Control Instrumentation Group Anupama Arcade 2 Floor Opp Samachar Apts Mayur Vihar Extn Phase 1 New Delhi 110 091 Tel 011 22713485 22712902 3 Fax 011 22710484 Email forbes nda vsnl net in fmdelcig sify com HYDERABAD Plot No A 19 2 amp T 4 2 D A Nacharam Hyderabad 500 076 Tel 040 27152276 27170732 27171909 27153918 Tel 040 27151664 Fax 040 27173235 27179223 27152193 Email saleshyd satyam net in saleshyd sancharnet in JAMSHEDPUR 59 Rajendra Nagar Jamshedpur 831 001 Jharkhand Tel 0657 2437721 Telefax 0657 2427983 Email jsr_fmjsr sancharnet in KOLKATTA 5A Orient Row Kolkatta 700 017 Tel 033 22407359 22835807 22835809 Fax 033 22475280 Email fmcal cal vsnI net in MUMBAI 107 Mahatma Gandhi Road Mumbai 400 023 Tel No 022 2267 3821 2267 3822 Fax 022 22672970 Email mumbai forbesmarshall com NAGPUR 50 ASHA 2nd Floor Lendra Park New Ramdaspeth Nagpur 440 010 Tel 0712 2539386 Telefax 0712 2549851 Email nagpur forbesmarshall com NAVI MUMBAI Ellora Sector 14 Plot No 45 Opp Marathe Bhavan Vashi Navi Mumbai 400 705 Tel 022 27666157 27655969 Fax 022 27881533 Email fmvashi vsnl com
3. 5 Notes 15 32 1 About The Product The Monec 8964 conductivity Resistivity transmitter is a Microprocessor operated field mounting instrument to monitor the Conductivity or Resistivity of process solution and transmit 4 20 mA current as a retransmission output The analyser is designed with modular hardware and user friendly software support The 8964 range of transmitters are designed to suit intrinsic and non intrinsic applications In all there are 2 versions of transmitter units in this range 8964 Nonintrinsic version 8964 EX Intrinsic version The Intrinsic versions are marked as EX which correspond to the ignition safety classification Intrinsic safety in accordance with IS standard 5780 E Ex ia IIC T5 All these models are compatible to two electrode conductivity sensors with cell constants 0 01 0 1 1 0 amp 10 Since the transmitters are Microprocessor operated all the application specific parameters are field programmable such as cell constant measuring range type of temperature compensation current output format calibration mode etc The unit offers high reliability and easy serviceability due to modular hardware structure reducing maintenance lead time The software calibration facility allows operation of the instrument without opening the instrument 1 2 Specifications Two electrode conductivity sensors with cell constants 0 01 0 1 1 amp 10 cm Power 15 5 30V the EX m
4. 21 Mode selected is linear Mode selected is nonlinear Enter temperature Co efficient Return to Measurement mode 22 Return to Measurement mode Linear current output Displays HiS Displays HiS Set upper end of measuring range Set upper end of measuring range 10 00 msicm kK Continued Q 23 No Yes Displays MES Yes Return to Measurement mode Displays LoS Set lower end of measuring range 10 00 mS cm Yes Return to No Measurement mode D Calibrate the slope Calibrate the zero Measurement with sample Measurement without sample Set measured value Read zero setting No Return to selection of unit of measurement GD 25 3 3 1 Selecting type of measurment After the FCt message the choice of either Conductivity or Resistivity measurement can be opted for The selection entails selecting set of parameters stored in the memory of the instrument defining the operating mode The analog output the probe co efficient the threshold values are handled in different ways according to whether the instrument is operating in Conductivity or Resistivity Modification in measurement type enables rereading all the parameters corresponding to Conductivity or Resistivity 3 3 2 Selecting cell constant The CtE message demands the cell constant selectio
5. PUNE PB 29 Mumbai Pune Road Kasarwadi Pune 411 034 Tel 020 27145754 Fax 020 27147379 Email pune forbesmarshall com SURAT 7B Ground Floor Navchetan Society Opp Krushimangal Hall Ring Rd Surat 395 007 Telefax 0261 2651448 2650896 Email surat forbesmarshall com VADODARA 10 Shreeji Krupa Society Gotri Rd B H Kalpavruksha Complex Subhanpura P O Vadodara 390 023 Tel 0265 2343733 Direct 0265 2342234 Fax 0265 2337930 Email baroda forbesmarshall com VISAKHAPATNAM 403 Crescent Towers Opp Enadu Seethammadhara Visakhapatnam 530 013 Tel 0891 2552538 Fax 0891 2535576 Email vizag forbesmarshall com REPRESENTATIVES BHOPAL MIG 24 2A Saket Nagar Bhopal Tel 0755 2582710 Cellular 098261 62047 Indore 36 A Narmala Nagar Annapurna Rd Indore 452 009 M P Tel 0731 5058030 Cellular 0731 3102220 098260 17398 MADURAI 55 LIG Colony K K Nagar Madurai 625020 PONDICHERRY dakshin_tds yahoo com
6. Tel 079 26851738 26856374 Direct 079 26859395 Fax 079 26854014 Email ahmedabad forbesmarshall com ALIBAG Pent House No 1 Bafna Baug Complex B Behind Big Splash Hotel Chendhare Alibag 404 201 Tel 02141 223795 0 Fax 02141 223796 0 Email fmalibag pn3 vsni net in BANGALORE 21 Coles Road Cleveland Town Bangalore 560 005 Tel 080 25483047 25485626 25484281 Fax 080 25499971 Email forbes bgl vsnI net in CHANDIGARH SCO 77 Top Floor Sector 38 C Chandigarh Tel 0172 5080285 Fax 0172 695098 Email forbes eth net CHENNAI Plot 59 Montieth Rd Asha Mansion Egmore Chennai 600 008 Tel 044 28554493 28553011 Fax 044 2855380 Email chennai eth net COIMBATORE Flat No 4C Classic Garden Apts 1552 19 Trichy Rd Coimbatore 641 018 Tel 0422 2303679 22306015 Fax 0422 2300072 Email forbescb md3 vsnl net in DELHI Steam Engineering Group 24 Laxmi Insurance Bldg Asaf Ali Rd New Delhi 110 002 Tel 011 23232947 23232756 Fax 011 23233762 Email delhiseg dishnetdsl net MANUFACTURING UNITS PUNE KASARWADI PB 29 Mumbai Pune Road Kasarwadi Pune 411 034 Tel 020 27145754 DID 020 27149012 Fax 020 27147379 HYDERABAD Plot No A 19 2 amp T 4 2 Tel 040 27151664 http www forbesmarshall com spirax PUNE MIDC A 34 35 MIDC H Block Pimpri Pune 411 018 Tel 020 27442020 Fax 020 27442040 Email pune forbesmarshall com spirax http
7. from 4 mAcurrent adjustment 4 2 1 5 Calibration of temperature measurement In this step the temperature measurement in Auto mode can be calibrated The message t C is displayed followed by the measured temperature in Auto mode With the help of scroll keys the displayed value can be adjusted Now press Select to return to measurement mode or press Enter which enables restart at current calibration step 35 4 3 Spare C2013731 CPU board C2013733 Power supply board 8964 C2018807 Cable gland C2013776 Instruction manual C2013666 Power Supply 8964Ex 4 4 Service If you still need help please contact your nearest Forbes Marshall representative The addresses and contact numbers of our major branches are listed on the back of this manual They ll be happy to direct you to any representative in your area or provide service themselves Please record all instances of field service problems and actions taken in the space below Product Serial Number Date Problem 36 Action Taken Serviced by 4 5 Field Service Report This form should be used to report field problems A copy should be filled out by your Forbes Marshall customer service engineer Any servicing which requires the product to be sent back to Works cannot be completed without this report If the product is returned to our Works you should include either the original excise gate pass or our invoice number and date If you d
8. of change accelerates and the desired setting is quickly reached 2 The Select key Pressing Select while in the measurement mode transfers the program into the display mode Once in this mode various parameters can be retrieved and read but no changes are possible Simultaneous pressing of Select and Enter keys activates the programming mode In this mode desired parameters can be chosen with Select key Increase the value The whole program can be scrolled by pressing Select key continuously Decrease the value 3 The Enter key This key returns the program into measurement mode after storing the programmed settings If Enter is pressed during calibration the latest measurement data is displayed 3 2 Operating modes The instrument offers 3 different operating modes Programming mode This mode can be enabled by pressing Select and Enter keys simultaneously The prompt Pr indicates that programming mode is invoked Display mode By pressing Select key alone enables entry in display mode In this mode all the operating parameters can be read only and no alterations are possible in any operating parameter Measurement mode In this mode the instrument carries out routine measurements according to operating parameters programmed In order to enter programming mode at any point of time Select and Enter keys need to be pressed simultaneously Note Whenever progra
9. prefer an estimate before proceeding with repair You should clarify on the form whether you would like to see an cost estimate before we make any necessary repairs If you indicate that an estimate is required our Works Engineer will complete Part 6 of the form and return it to you If this estimate is satisfactory you should approve the estimate and return the approved form to your Forbes Marshall representative Only then will servicing proceed 37 Forbes Marshall Field Service Report Report Date 1 Customer Information Customer Name Contact Person Phone Reference 2 Product Information The Productis O On line O Off line Connections D Flanged D Screwed D Welded Mounting Details 3 Application Information Sensor Details If any Mounting Details 38 4 Observed Problems or Symptoms 5 Proposed Action Repair at Site Return to Works Estimate First or Under Warranty Field Engineer s Sign Customer s Signature 6 To be Filled in for Estimate Purpose Estimated Cost List any imported spares which must be provided by Customer Signature of MFG CSD Engineer 7 Customer s Endorsement We accept the above repair estimate Signature amp Stamp 39 5 Notes Notes BRANCHES ACROSS INDIA AHMEDABAD 4 Shetoor Bunglows Opp Drive In Petrol Pump Near Chandandwar Hospital TV Tower Anmedabad 380 054
10. A 4 Forbes Marshall Monec 8964 Conductivity Resistivity TRANSMITTER User s Manual Monec 8964 Conductivity Resistivity TRANSMITTER User s Manual This user manual corresponds to the Monec 8964 8964 EX conductivity Resistivity transmitter part Nos 8964 8964 EX and is the June 2005 revision P C No C2013776 If you experience difficulty with the installation or operation of this equipment please contact our Customer Service representative Manufactured and Marketed by Forbes Polymetron Pvt Ltd A Forbes Marshall Company A 34 35 MIDC H Block Pimpri Pune 411 018 INDIA TEL 91 0 20 27442020 FAX 91 0 20 27442040 TLX 0146 323 FSON IN 10 04 Dear User Thank you for purchasing the Monec 8964 conductivity Resistivity transmitter To maximize your benefits from this product we request that you read this manual thoroughly before installing the system A record of the product s maintenance history should be kept in this manual s Field Service Record every time our service representative visits you What s Inside 1 About The Product General Description Specifications Operating Principle 2 Getting Started Included Items What You Need Installations Commissioning the Product 3 Operation and Maintenance Basic Functions Programming Calibration Do s and Don ts 4 Fixing Problems Troubleshooting Spares Service Field Service Report
11. e Parameter initialisation e Choice of language for messages e Calibration of display e Calibration of current output e Calibration of temperature measurement This can be done in regular programming mode as well Parameter initialisation This is the first step in starting configuration mode On entry in this mode The message Par appears on the display and default values are loaded in system scratch pad memory in automatically These default values are as listed below Operating mode Conductivity Probe Coefficient 0 01 cm Temperature measurement Manual Temperature value 25 C Slope 100 Zero conductivity correction 0 Temperature compensation Linear Temperature compensation coefficient 2 0 C Measurement scale Linear Measurement scale maximum 100uS cm 100MOQcm Measurement scale minimum 2 uS cm 1 MOcm NOTE Since the entry in starting configuration mode enables storage of default values the previous entries done during programming mode are overwritten Hence after exit from starting configuration mode the programming has to be done again 33 4 2 1 2 Choice of language of messages Here the language option is provided for the abbreviated messages displayed during programming and calibration The selection can be made using roll keys The display Fr means French and En means English language Only a few messages are affected by this choice Messages in Fr
12. ench Messages in English Expression LEC ECH SuP InF 4 2 1 3 Calibration of display rD Read only mode SCL Measurement range HiS Measurement range upper limit LoS Measurement range lower limit Atthis stage the display calibration can be done in sequence as follows Disconnect the probe or conductivity simulator from transmitter Display P1 will appear followed by value of conductivity Adjust potentiometer P1 on CPU board till display shows 0 Now press Enter key Display P2 will appear followed by conductivity value Adjust potentiometer P2 till 500 is displayed At this stage Select should be pressed to move to next step i e Calibration of current output or Enter should be pressed to restart from the first step of P1 adjustment 34 4 2 1 4 Calibration of current output In this step the current output corresponding to beginning amp end of the measurement range can be adjusted The message I 4 is displayed followed by adjustment coefficient Adjust the coefficient with roll keys until consumed current is read as 4 mA Now press Enter key The message I 20 will be displayed followed by another coefficient Adjust this coefficient with roll keys until consumed current is read as 20 mA Atthis stage Select should be pressed to return to measurement mode or Enter should be pressed to restart
13. logarithmic i e log function of the measurement The output current value follows the following functions LINEAR ANALOG O P LOGARITHMIC ANALOG O P Measure Min Meausre Max 100 sl WA mani ee eT AO 10 20 30 40 50 60 70 80 90 100 27 3 3 8 Setting upper limits Upper limit of measuring range is entered after HiS message The maximum value is dependent upon the cell constant value Hence this value should be entered as per the defined limits shown in the table below Probe constant Upper limit of measuring range K cm Conductivity Resistivity Min 100 KQ cm 100 MQ cm 0 10 Min Max 1 00 Min Max 10 0 Min This value corresponds to current of 20mA 3 3 9 Setting lower limits Lower limit of measuring range is entered after LoS message For linear analog output this value can be selected between 90 of upper limit and 1 10000 th of upper limit For logarithmic analog output it is always restricted to the value equal to the upper limit divided by 100 since the range of the scale covers two decades This value corresponds to current output of 4mA 3 3 10 For calibration refer section 3 5 28 3 4 Read Mode During READ mode or programming mode the parameters are displayed in following order 1 Measurement type Conductivity or Resistivity 2 Probe constant expressed in unit cm cm 3 Temperature measurement type automatic or manual 4 Temperature val
14. luminum Protection IP65 as per DN 40050 Nema 4 for wall mounting 165H x 165W x 93D mm 200H x 165W x 93D mm with installed cable gland Cable glands 2x NPT material SS316 Storage temp 20 70 C Ambient temp 10 50 C Packaging 5 ply corrugated box Front Label UV resistant polycarbonate 1 3 Operating Principle The two wire transmitters are characterised by only two leads serving both as a source of power supply and a means for analog signal transmission in the form of a 4 20 mA DC current The entire hardware is structured as functional modules assembled together The DC power supply is converted in split supplies required to drive the processing circuit through a Power pack assembly which is potted for environmental protection and a long sustained life The measuring cell is powered by a sinusoidal voltage of known amplitude The frequency of this excitation signal can be selected as either 70 Hz or 1100 Hz by a jumper STR1 on Power Supply board This signal is delivered by an oscillator of low output impedance to minimise cable capacitance effect A stable amplifier converts the current going through the probe in a voltage by means of a synchronous detector which eliminates the effect of external interferences and capacities A special Analog to Digital converter digitises the analog voltage suppressing noise signals thereby providing for more accurate pH and temperature measurements The digi
15. mming is aborted to enter measurement mode a prompt MES appears on the display for some time before displaying measured parameter 16 3 3 Programming The programming is done with the 4 keys on the front facia Various fonts displayed during the programming are shown in the following table to help understand the mode and parameter to be programmed Operating mode measurement Operating mode programming Operating mode display Unit of measurement Conductivity measurement Resistivity measurement Cell constant Temperature measurement mode Automatic temperature measurement Manual temperature measurement Followed by CCt Linear temperature compensation Non linear temperature compensation Temperature coefficient Current out put mode Calibration mode Followed by SCL Analog output Be aala to measurement The programming mode is accessed by simultaneously pressing Select amp Enter The symbol Pr appears The flow chart explains sequence of Programming various operating parameters 17 Press SELECT and ENTER keys simultaneously Displays CtE Select cell constant Values shown here in flowchart are indicative only PANG ag E AE EA 20 9 9 No Yes Yes No j gt 4 gt Return to Measurement mode Select temperature pensation mode Return to Measurement mode
16. n which can take four values as K 0 01 cm K 0 10 cm K 1 00 cm K 10 0 cm Each cell constant has a defined permissible measuring scale Hence if this value is changed the previous measuring scale might go beyond the related measuring scale The scale programmed has to be changed so as to be compatible to the cell constant value 3 3 3 Selecting type of temp compensations The message t C asks for the type of temperature measurement as either automatic or manual In Manual mode the previously set temperature is displayed which can be set to desired value with the help of roll keys In Auto mode the temperature is measured through Pt 100 sensor 3 3 4 Adjusting temperature The temperature displayed at any point of time is in C The value displayed in Manual mode can be set with roll keys 3 3 5 Selecting type of temperature compensations The message CCt enables entry of temperature compensation as either linear or nonlinear The two modes appear alternately if any roll key is pressed The selection can be confirmed either by Select or Enter key 26 3 3 6 Adjusting temp co off If linear compensation is selected the previously entered coefficient is displayed which can be changed between 0 0 C and 10 0 C with the help of roll keys 3 3 7 Selecting type of current output The message SCl is for selecting output current type either linear i e proportional to the measurement or
17. odel requires intrinsically Supply safe power supply with 30V 100 ma max 725 Q max at 30 volts 425 Q at 24 V DC Screw type wire dia 2 5 mm max Temp Automatic 0 130 C with Pt 100 Comp Manual 0 130 C in steps of 0 1 C Temp Ind 0 130 C Measuring lt 5 seconds Cycle O P Signal 4 20 mA load 725 0 max at 30 V DC galvanically isolated Signal 70 Hz 1100 Hz jumper selectable by a bridge Frequency Calibration Computer assisted through tactile keyboard Accuracy 1 of calibrated span Measurement 1digit Display 1 C Temperature measurement Slope adj 50 150 of the nominal slope at 25 C Data Last measurement is retained during calibration and protection programming in EEPROM 3 digit LCD 18 mm height Analog Resolution 10 bits output Galvanic insulation 2000 V DC Accuracy 1 5 Log mode 0 5 Linear mode NB To obtain a relative error less than 1 Yo when measuring a very high conductivity a very small resistivity use a cable of less than 10 mtr length Cable length and range of measurement Cell Signal Range of measurement Constant Frequency Conductivity Resistivity yuS cm mS em KQ cm MQ cm 100 00 100 00 100 00 100 00 10 00 10 00 10 00 10 00 1 00 10 0 100s 1 00 1 00 10 0 1 00 1 00 10 00 100 0 0 10 0 10 10 00 100 0 0 10 sisi 0 10 Enclosure Material Epoxy coated cast a
18. sages and their meanings are as listed below PROBLEM POSSIBLE Error data recording CAUSE REMEDIES Invoke starting configuration mode and reprogram process parameters afterwards Probe shorted lt 1000 Temperature sensor open or short Temperature compensation impossible A D conversion error Calibration error Check the Pt 100 for short and rectify the fault or replace the element Check the Pt 100 resistance across its leads and the proper connection on PCB or replace the element if found open Check for proper connection between CPU and P S board and replace CPU board if problem is not solved Check for proper connection between CPU and P S board and replace CPU board if problem is not solved Check the measurement range programmed and redo the calibration NOTE Messages other than Er1 and Er5 remain displayed until Enter key is pressed 32 4 2 Calibration of current o p The current o p is calibrated amp does not required to the adjusted again Hence carry out this operation only if you find the current o p outside the specified according limits For calibrating current o p the starting configuration mode must be accessed 4 2 1 Starting Configuration Starting configuration mode can be accessed by pressing roll keys increment and decrement simultaneously and held pressed before powering the instrument This mode allows following settings in sequential steps
19. t i Instead of using known conductivity sample the cell is disconnected amp a standard resistor is connected atthe cell terminals ii The instrument must be kept in Manual temp comp mode with temp setat 25 C It can be in auto mode but then a resistance of 109 730 must be connected across pt100 terminals The value of the resistance to be connected calibrated using the formula below R K o R i p resistance in Q K cell constant o conductivity in Siemens cm Observe the reading amp current o p at other conductivity values in the range Use the same formula for calibrating resistance value to be connected at all terminals 30 3 6 DO S and DON TS e Don t ever try to adjust the potentiometers on CPU board without genuine reason e Don tpress the keys too hard while programming e Don t go in for Starting configuration mode without confirming the problem in calibration e Do ensure that the transmitter is mounted firmly on panel or pipe as application demands e Do check that the probe is clean and dry before immersing in process solution e Douse the proper tools while removing making electrical connections 31 4 Fixing Problems 4 1 Troubleshooting The MONEC transmitters being microprocessor based offer self diagnostic and error reporting feature This feature enables the user to identify the possible cause of the problem and decide the remedy for the same The error mes
20. tal data is further processed by a dedicated microprocessor to perform auxiliary functions as display retransmission output generation calibration enabling programming and co relating programmed data to actual processing The results are displayed on a 3 1 2 digit LCD display The application specific parameters such as measuring range calibration mode and type of temperature compensation are field programmable The measured conductivity is temperature dependent This relation is explained in two different modes as follows Linear mode Conductivity as function of temperature is given as C C 1 a t 25 where Ct Conductivity attemperature t a Temperature coefficient expressed in C t Process temperature in C Non linear mode Conductivity is expressed in this mode as Ct CH O T CS x NaCl 25 CH O 25 NaCl T NaCl gt lonic conductivity of NaCl where CH O gt gt Conductivity due to ultrapure water Both these parameters are given by tables The block diagram shown in FIG 1 gives a clear picture of data routing and different functional blocks interconnected GALVANIC ISOLATION LCD DISPLAY N 4 5V EPROM EEPROM 4 5V lt ee bh E POWER SUPPLY COUPLER MICROPROCESSOR OPTO CPU OPTICAL OPTICAL
21. the mounting plate and insert M6 x 20 L bolts through the four corner holes Fix 4 nos of M6 spring washers and nuts from the rear end of the mounting plate Hold the nuts and tighten the bolts with the help of suitable spanner This completes mounting the transmitter in place 165 mm 150mm 7 150 mm 165 mm 35 50 mm 35 50 mm 1 2 NPT SS CABLE GLAND FIG 2 Wall mounting of Transmitter 2 3 2 Pipe mounting The 2 NB pipe mounting kit is supplied along with the Transmitter unit which could be used to mount the transmitter on a 2 NB pipe The dimensional details of pipe mounting arrangements are as shown in FIG 2 2 The sequence of mounting is as follows Hold the transmitter and the mounting bracket firmly on a pipe and insert 2 nos of U clamps through the mounting bracket Il Fixthe mounting bracket firmly on the pipe using 5 16 washers and MB nuts Ill Ensure that the transmitter and the mounting bracket are held properly on the pipe This completes pipe mounting of the transmitter FIG 2 2 B Vertical pipe mounting of transmitter TOP VIEW 1 MONEC transmitter 2 M6x20 Bolts to fix transmitter to mounting bracket 3 M8hex nuts and 5 16 washers to fix U clamps to mounting bracket 4 Mounting bracket 5 Standard 2 NB pipe 6 M6 hex nuts and M6 spring washers to fix
22. transmitter to mounting bracket 7 U clamps to hold transmitter on mounting bracket to standard 2 NB pipe 2 4 Electrical connections All the cables should be routed through the cable glands and rubber seals of the glands before the wires are terminated on the connectors Care should be taken to avoid mechanical damage while stripping the cables One the instrument is suitably mounted open the transmitter by unscrewing 2 nos of knurled captive screws on the transmitter Shown below in is a part view of the PCB which ill be observed on opening Terminal Block on the casting FIG4 Field connections for 8964 amp 8964 EX 2 4 1 Sensor Connections The connections for the conductivity sensor and the temperature sensor should be made as follows 2 Conductivity sensor electrode any one of the two Conductivity sensor electrode i as one pt 100 pt100 oneend sd end In most of the conductivity sensors the temperature sensor is inbuilt It is necessary to identify the wires belonging to the temperature sensors and those of the conductivity electrodes before making the connections Considerations in hazardous locations For mounting of transmitter in safe area any version is suitable i e 8964 or 8964Ex However for mounting of transmitter in hazardous locations only the 8964Ex version must be used Further following conditions must be The power must be supplied by a certified in
23. trinsically safe power supply 10 2 4 1 1 Connections of conductive sensor type 8310 8311 amp 8312 In many cases conductivity sensors are provided as part of a routine conductivity measuring system Model 8310 for cell constant K 0 01 cm 1 Model 8311 for cell constant K 0 1 cm 1 amp Model 8312 for cell constant K 1 cm 1 All models have inbuilt temp sensor Pt 100 The cells contain male connector as part of the cell body Hence these cells are provided with a cable having mating female connector at one end The other end of cells contains wires which are to be connected to the transmitters Identifications of the wires belonging to temp sensor amp the conductivity electrodes is done by the colour of the wires as given below sensorinnerelectrode White sensor outer electrode Red Temp sensor pt100 Black Temp sensor pt100 Blue Earth Shield 11 Black Blue White Shield ee Cable with female connector Conductivity cell with male connector Fig 5 Conductivity cell amp cell cable 2 4 2 Power supply current o p conductivity From the terminal 6 7 amp 8 wires have been routed internal to the transmitter housing to a 3 way terminal block as shown in figure Fig 6 Power Supply Connections for 8964 8964 Ex Connect the power supply wires at the terminal block Being a 2 wire the current output is available thro
24. ue expressed in C 5 Temperature compensation type linear or logarithmic 6 Temperature compensation co efficient expressed in Yo C 7 Output current type linear or logarithmic 8 Upper limit of measurement scale Lower limit of measurement scale 3 5 Calibration For calibration go in to the programming of made sequence see 3 3 amp flow chart refer and arrive at the CAL step and proceed as follows 3 5 1 1 Slope calibration using known conductivity sample In the CAL made Choose SLO Take a conductivity sample of known value The value should be within the measuring range for the application Dip the conductivity cell in the solution and read the display value Adjust the reading to a value of conductivity sample Press SELECT to remain in programming sequence or press ENTER to go to measurement made This completes slope calibrations 3 5 1 2 Zero calibration For calibrating zero arrive at CAL in the programming sequence Choose 29 C 0 Remove the sensor conductivity cell from the solution amp shake dry The zero calibration is complete on pressing either Select or Enter on pressing Select the programme advances to next step while on pressing Enter the instrument goes into measurement mode 3 5 1 3 Calibration using standard resistors The performance of the transmitter can be checked by calibration it with standard resisters The procedure for calibration is same as 3 5 1 1 bu
25. ugh these same wires 12 To connect to a 4 20mA the current i p input terminals of the must be in series with the power supply amp the see fig 7 KANEA Fig 7 Looping a Transmitter with power supply amp receiver More than one receiver can be connected in the series keeping in mind correct polarity Also ensure that the loop resistance does not record 425 ohms for 24 V supply 13 2 5 Commissioning the Product Ensure that the transmitter is mounted firmly on a panel or a pipe as required Check all the connections of sensor and signal terminals Ensure that the conductivity probe and Pt 100 are mounted properly Verify the programming for correct parameters entered as per process requirement Calibrate the system Read section 3 5 14 3 Operation and Maintenance 3 1 Front Panel Details polymetron N Select Enter aE A Ex PB MONEC 8964 Va polymetron xX Select AN Enter S N LZ A TNonec 8964 FIG 8 Front panel Fig 8 shows the front facia for the transmitters The Ex symbol indicates that the instrument has intrinsically safe electronics The four nos of keys can be grouped as 1 The Rollkeys Upon first pressing the rollkeys the selected values change slowly in steps After approximately 10 steps the rate
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