Manual - Amalgamated Instrument Co Pty Ltd
Contents
1. LM335 LM335 Temperature sensor Page 9 of 30 across terminals 7 and 9 1009 and 10000 RTDs 3 Wire Configuration LM335 Temperature Transducer PM42COMA 1 6 0 3 2 Hardware Configuration Selecting the temperature probe type Dismantle the instrument as described in chapter 7 titled Input Output Configuration Insert the links into the appropriate location on the pin header to suit the input or range required 100 OHM RTD PT100 or 100 OHM THERMISTOR 1000 OHM RTD or UUB25J1 THERMISTOR LM335 SEMICONDUCTOR PT1000 SELECTED SELECTED SENSOR SELECTED 1000R 100R 335 1000R 100R 335 1000R 100R 335 LK1 LK2 LK3 LK1 LK2 LK3 LK1 LK2 LK3 PS4CONC 1000R_100R 335 LK1 LK2 LK3 Main Circuit Board Page 10 of 30 PM42COMA 1 6 0 4 Explanation of Functions The PM4 2CO setup and calibration functions are configured through a push button sequence Two levels of access are provided for setting up and calibrating FuRE mode simple push button sequence allows access to commonly setup functions such as alarm setpoints CAL mode power up sequence plus push button Front view of instrument SETUP PUSHBUTTONS Flay sequence allows access to all functions including calibration parameters The push buttons located at the front of the instrument are used to alter settings Once CAL or FUME mode has been entered you can step through the functions by pr2. Outer TBPS Cells Electrodes or Cell of yellow or white wire Centre Electrodes or Cell In blue wire my Cells In and Out blue amp yellow or white wires may be connected either way around with TBPS types Page 8 of 30 PM42COMA 1 6 0 Cell Wiring Connect the cell as shown below 718 91011121314 PM4 rear C terminals Temperature Probes C ELL OUT CELL IN CELL 2 CELL OUT CELL IN CELL 1 TEMPERATURE PROBE Note only one temperature probe input is provided The temperature probe may be inbuilt in one of the cells or can be a separate temperature probe The PM4 2CO will accept 2 or 3 wire RTD 1004 or 10009 LM335 100Q thermistor or UU25J1 thermistor type temperature sensors Wiring for these sensors is as shown below Ensure that the links for the temperature probe type are set see Hardware Configuration section which follows and that the E t YPE function is set to the appropriate type 1009 and 10000 RTDs 2 Wire configuration or 1000 thermistor or nn 100 and 10000 RTDs 2 Wire Configuration 1000 thermistor or UUB25J1 thermistor Note If using the UUB25J1 a 220 resistor must be placed UUB25u1 thermistor Note If using the VUB25J1 a 220 resistor must be Y Link 7 amp 8 placed across terminals 7 8 9 4 2200 P UUB25J1 100Q and 10002 RTDs 3 Wire configuration
3. 8 RTD 3 WIRE 9 RTD 10 CONDUCTIVITY IN 11 CELL1 OUT 12 GND 13 CONDUCTIVITY IN 14 CELL2 OUT MODEL No SERIAL No PM4 2C0 240 5E A Instrument Data Label example Page 7 of 30 CONDUCTIVITY J PROBE 2 INPUT CONDUCTIVITY J PROBE 1 INPUT TEMPERATURE PROBE INPUT PM42COMA 1 6 0 3 1 Probe Connections Conductivity Resistivity Cells The conductivity resistivity cell is connected to pins 10 amp 11 cell 1 and 13 amp 14 cell 2 at the rear of the instrument Pins 10 amp 13 are the input connections i e the current input from the cell Pins 11 and 14 are the output connections If using a centre core type cell the centre core wire should be connected to Pin 10 Ensure that the Pr bE CASE amp PFhbe CMSe function has been correctly set for probe type For example AIC conductivity resistivity cells with temperature compensation sensors are all wired with Red Black Blue and Yellow or White on older models inner core cable See the note below for details of TBPS cells without temperature compensation sensors The wiring connections are as below Cell wiring colour codes AIC Cells SDI Cells Cell in Blue Black Cell out Yellow or White White Temperature Red Red Temperature Black Green Shield n a Clear TBTH Cell GO OO necio layout Wires for TBTH cell Red A ssent aaena narena Black TBLR Blue Yellow or White
4. O EIR a gt above Channel 2 probe constant Bea and sets the channel 2 probe cell constant K number values of 8 8 1 8 895 85 62 5 18 2 0 5 5 8 58 or 100 may be selected 3 3 GFF orH on Hydrogen ion compensation displays and sets the hydrogen ion compensation feature to either be on or off See Calibration Resistivity amp Temperature section for details When measuring high purity water solutions compensation needs to be made for hydrogen ions as well as temperature When set to H G7 the instrument compensates for the H and OH solvent ions that have an effect on water conductivity resistivity When set to H G7 the instrument compensates for the H and OH solvent ions which become prevalent at low conductivity These ions have an effect on water conductivity resistivity due to having different temperature compensation curves to water This setting is common to both input channels Im zD mr E as n a Null calibration null calibration allows the channel 1 probe to be referenced to the instruments display value at zero conductivity See Calibration Conductivity Resistivity 8 Temperature chapter for details Par rm aruy go TFT Pu n a Channel 1 calibration points displays and sets channel 1 calibration points See Calibration Resistivity amp Temperature chapter for full details of setting up CAL when used after CAL MULL sets the calibra
5. seen only in bargraph display instruments display Displays and sets the bar graph high value i e the value on the 7 segment value display at which the bargraph will reach its maximum indication all LED s illuminated May be independently set anywhere within the display range of the instrument bAr bAr Bar graph display operation mode seen only in bargraph display instruments ESPE S5 dokt Allows selection of bargraph operation mode choices are d dot bRr conventional solid bargraph display i e all LED s illuminated when at full C bAr scale When scaling the display use the bRr and bAr functions e g bAr 8 and bAr 88 will give a bargraph with no segments lit at a 7 segment display reading of amp and all segments lit with a 7 segment display reading of mn Cosh S dat single dot display A single segment will be lit to indicate the input readings position on the scale When scaling the display use the bRr and bAr functions e g bAr 8 and bA 88 will give a bargraph with the bottom segment lit at a 7 segment display reading of E and the top segment lit with a 7 segment display reading of 8a Note this could also be set up as a centre zero single dot display by entering a negative value and positive value e g bAr G0 bAr 7 08 d dot double dot display Two segments will be lit to indicate the input reading position on the scale The reading should be taken from the middle of t
6. PM42COMA 1 6 0 6 4 Temperature Calibration Null Note the temperature sensor type should be selected using the amp EYPE function and appropriate links set prior to calibration The temperature null calibration function 9 Fugit allows the temperature input to be nulled or zeroed This procedure only needs to be executed upon initial calibration or if the temperature probe is changed Ensure that correct temperature probe has been selected under the E EYPE function and that appropriate hardware links have been set for the probe type see the Input output configuration chapter Step through the functions until SE Mist L is reached Place shorting wires across the temperature input pins pins 7 8 and 9 Press both BY and M together a temperature will be displayed Press GJ the message E Fugit End should be displayed If any other message is seen refer to the Error Messages appendix 6 5 Temperature Calibration The temperature calibration is a single point calibration Place the temperature sensor in an accurately known temperature environment and allow to stabilise To enter the temperature calibration mode enter CAL mode see Explanation of functions chapter and step through the functions by pressing the G button until the display shows CAL PC Press the and M simultaneously the display will show CAL o followed by the live temperature reading Press the 4 button the display will now show followed by a
7. condition is present The alarm condition must be present continuously for the trip time period before the alarm will trip This function is useful for preventing an alarm trip due to short non critical deviations from setpoint The trip time is selectable over amp to 6 seconds Rxre Gto 50 Alarm reset time displays and sets the alarm relay reset time With the alarm seconds condition is removed the alarm relay will stay in its alarm condition for the time selected as the reset time The reset time is selectable over E to amp amp seconds Axn oor Axnm ao Alarm x normally open or normally closed displays and sets the setpoint alarm Axn e or relay action to normally open de energised or normally closed energised Axn e when no alarm condition is present A normally closed alarm is often used to provide a power failure alarm indication br Get Gto 5 Display brightness displays and sets the digital display brightness The display brightness is selectable from Bto 5 where lowest intensity and 5 highest intensity This function is useful for improving the display readability in dark areas or to reduce the power consumption of the instrument The functions which follow are accessible via RL mode only Page 13 of 30 PM42COMA 1 6 0 Function Range Description FEES Any Recorder retransmission output low value refer to the separate PM4 Panel display Meter Opti
8. conductivity level can be found from the formula 1 conductivity cm Resistance Ohms K factor x e g for a K 0 1 cell in a 2000 uS cm solution the resistance is 50 Ohms see below which is not acceptable Changing to a K 1 cell would result in an acceptable resistance of 500 Ohms Resistance 0 1x oo A 50 Ohms 2000x10 Page 29 of 30 PM42COMA 1 6 0 10 Guarantee and Service The product supplied with this manual is guaranteed against faulty workmanship for a period of 2 years from the date of dispatch Our obligation assumed under this guarantee is limited to the replacement of parts which by our examination are proved to be defective and have not been misused carelessly handled defaced or damaged due to incorrect installation This guarantee is VOID where the unit has been opened tampered with or if repairs have been made or attempted by anyone except an authorised representative of the manufacturing company Products for attention under guarantee unless otherwise agreed must be returned to the manufacturer freight paid and if accepted for free repair will be returned to the customers address in Australia free of charge When returning the product for service or repair a full description of the fault and the mode of operation used when the product failed must be given In any event the manufacturer has no other obligation or liability beyond replacement or repair of this product Modifications may be made to an
9. scaling value Press and release A until the FUNE Endmessage is seen and the display returns to normal measurement PM42COMA 1 6 0 Equivalent resistance values The following table shows equivalent resistances for various conductivity levels and cell constants If errors are encountered in the display value or if difficulties are encountered in calibration then an appropriate value resistor can be used in place of the cell to perform basic checks on the PM4 operation Cell resistance for calibration and cell simulation Cell K mS cm uS cm uS m Substitute Factor milliSiemens cm microSiemens cm microSiemens m Resistance K 10 0 100 100 000 10 000 000 1009 1000 K 10 0 10 10 000 1 000 000 1 0000 1kQ K 10 0 1 1 000 100 000 10 0002 10kQ K 1 0 10 10 000 1 000 000 1002 1000 K 1 0 1 1 000 100 000 1 0000 1kQ K 1 0 0 1 100 10 000 10 000Q 10kQ K 1 0 0 01 10 1 000 100 000Q 100kQ K 0 1 1 1 000 100 000 1000 K 0 1 0 1 100 10 000 1 0000 1kQ K 0 1 0 01 10 1 000 10 0002 10kQ K 0 1 0 01 1 100 100 000Q 100kQ 6 3 Low conductivity high resistivity calibration Low conductivity high resistivity calibration difficulties often occur due to the fact that once a sample is exposed to air the conductivity will rise rapidly due to the absorption of carbon dioxide Also the installation conditions such as pipe diameter and material can affect th
10. the calibration is cleared If any other message is seen refer to the Error Messages appendix Page 25 of 30 PM42COMA 1 6 0 6 8 ppm Calibration No special calibration funcitons are provided for ppm calibration If a channel is required to show ppm values then select conductivity as the display type and either enter the known ppm for the sample or multiply the known conductivity value by the ppm factor for the solution being measured ppm factor examples in table below For example if sea water is being measured in ppm then at the CAL SEt 1 function use the known conductivity of the sea water multiplied by 0 56 e g if the know value of the sea water is 30 000 uS cm then enter 16800 as the SEL value The null calibration and uncalibration procedure are the same as previously described for conductivity Standard solution Use Suggested PPAFACE value NaCl Salt water amp dairy products 0 560 442 General fresh water e g rivers 0 860 40 sodium sulphate lakes and reverse osmosis water 40 sodium bicarbonate 20 sodium chloride KCL Can be used in applications where 0 580 in place of a NaCl standard is used but is normally used as a conductivity rather than ppm standard CaCO3 Boiler and cooling tower water 0 480 Returning to the normal measure mode When the calibration procedure has been completed it is advisable to return the instrument to the normal mode where calibration func
11. value Now press the Y or bd button to set the correct temperature value then press the A button the display will read EAL End indicating that the calibration is complete If any other message is seen refer to the Error Messages appendix 6 6 Conductivity or Resistivity Uncalibration This function sets the instrument calibration back to the factory calibrated value Uncalibrate is useful as a temporary measure when the probe is replaced and on the spot recalibration is difficult or when a calibrating error exists due to incorrect calibration To enter the uncalibrate mode follow the procedure described above and step through the functions by pressing the A button until the display shows UE AL Eh i or UCAL Ch2 Press the 2 and pushbuttons simultaneously the display will show UE AL End indicating that the calibration is cleared If any other message is seen refer to the Error Messages appendix 6 7 Temperature Uncalibration This function sets the instrument calibration back to that of an ideal temperature sensor Uncalibrate is useful as a temporary measure when the probe is replaced and on the spot recalibration is difficult or when a calibrating error exists due to incorrect calibration To enter the uncalibrate mode follow the procedure described above and step through the functions by pressing the 3 button until the display shows HEAL PL Press the Y and M pushbuttons simultaneously the display will show YE AL End indicating that
12. zero If any other message is seen refer to the Error Messages appendix 6 2 Conductivity Resistivity Calibration After performing the null calibration as previously described place the required probe in a solution of known conductivity or resistivity for resistivity calibration ensure that the calibration solution resistivity is not above 1MQ Allow time for the instrument reading to stabilise Follow the procedure below 1 Enter the AL mode and step through the instructions until Eh ERL appears or The CAL if calibrating channel 2 input 2 Press B and M together the display will show a value with Eh CAL or Eh2 CAL 2 flashing every few seconds 3 Press and release the display will show a value with Eh SCL orEh2 SEL 1 flashing every few seconds 4 Adjust the value displayed to the known solution value using the and M pushbuttons 5 Press and release G the display will show CAL End followed by Eh ERL2 orEhe CALL If any other message is seen see Error Messages appendix then the calibration will need to be repeated If required a second point Eh ERL E or Che CAL E may now be taken to compensate for head resistance if this is required move on to step 6 if this is not required simply press and release B until the FUNE End message is seen 6 Clean the probe in pure water then insert into a second solution of known conductivity resistivity Note the second solution must have at least 50
13. 0uS cm difference or 10x difference for resistivity in value from the first solution see note below if it is not possible to have a 500uS cm difference or 10x difference for resistivity in the process you are using Page 22 of 30 PM42COMA 1 6 0 7 Repeat steps 2 to 5 for the second calibration point values Note lfthe range you are using does not allow for a 500uS cm difference or 10x difference for resistivity between EARL and CAL e then you should use the Null Calibration and EARL only The solution used for CAL should be as close as possible to the highest figure you will be using SCL1 Display Value SCL2 CAL1 NULL Input Example Channel 1 conductivity null and single point calibration Clean and dry the cell and place it in air then enter CAL mode see page 10 and release A until the nue function is reached Press A and M simultaneously a live display will now be seen If the live display is stable press the A button The message SEt will be seen Press 3 the message FULL End should now be seen Page 23 of 30 The message Eh i CAL will be seen Place the cell into a solution of known conductivity then press and hd simultaneously A live display will now be seen If the live display is stable press the A button The message Eh SEL will be seen Use the or MW button to enter the required value for the input then press and release A to accept the new
14. 5 0 1 0 05 05 18 5 40 2 8 roe CASE Probe 1 cell constant 5 8 18 20 SGor 80 D i r 5 9 10 505 05 18 5 40 2 8 Prb CASE Probe 2 cell constant 5 8 18 20 SBor 80 D i H GFE H GR Hydrogen ion compensation H GFForH on H OFF Choo ULE gell Conan nall See calibration chapter n a calibration Chi ERL A Slope calibration cell 1 See calibration chapter n a Eh ERE PeBISIANGE See calibration chapter n a compensation cell 1 Page 20 of 30 PM42COMA 1 6 0 eee Default Record your Initial display Meaning of display Next display setting settings The AULL Cell 2 conductivity null See calibration chapter n a calibration Che CAL i Slope calibration cell 2 See calibration chapter n a Resistance eer r b Che CRL compensation cell 2 See calibration chapter n a oc MULL Temperature null Calibration See calibration chapter n a CALC Calibrate temperature probe See calibration chapter n a cond un k Conductivity measuring units wS cA uS A AS cAOr ASA u5 cA UCAL Eh Uncalibrate conductivity cell 1 See calibration chapter n a UCAL Ehe Uncalibrate conductivity cell 2 See calibration chapter n a UCAL E Uncalibrate temp probe See calibration chapter SEE d SP Set default display FEStoreand cond P buk 2 button function NONE H Lo or WH Lo AONE ALA 2 Ai 3etctof 1 37 PRE Setpoint acces if sufficient relay
15. 5mm x 92mm 1mm amp Omm Plug in screw terminals max 1 5mm wire 400 gms Basic model 450 gms with option card Page 28 of 30 PM42COMA 1 6 0 9 Error Messages PM4 Conductivity meter error messages FULL EFF null error Reading too high when trying to null Possible causes are wet or dirty cell or faulty cable Of NULL EFF temperature null error Over range reading from probe Possible causes are incorrect link setting incorrect probe type selected and faulty probe wire OF FSE EFF temperature offset error The offset required to null the temperature probe was too great Check probe connections and link settings or MORE no temperature probe type selected Indicates that no temperature probe type has been selected If a temperature probe is to be used select one at the EYPE function oC SPAM EFF temperature span error The temperature for calibration was outside the range allowed i e outside the 10 C to 200 C range Check that correct temperature probe is selected and that correct links are selected Of 9A N EFF temperature gain error The temperature gain was more than 10 away from expected gain Check probe selection and connection is correct check for faulty probe CARL CEFF calibration point 1 error The conductivity or resistivity input is too high check for correct cell constant selection check cell for short circuit CAL i SPAN EFF calibration point 1 span error The EARL conductivity
16. 7 Specifications co AAA ER A 28 Error Messages io A ee eee ee ee 29 Guarantee and Service 2 eee 30 2C06 06D09 Page 2 of 30 PM42COMA 1 6 0 1 Introduction This manual contains information for the installation and operation of the PM4 2CO dual input conductivity resistivity monitor The PM4 is a general purpose auto ranging monitor which may be configured to accept inputs from a range of conductivity resistivity cells with cell constants ranging from K 0 01 to K 100 Ranges and typical cell factors are shown in the table below Cell Range Guide Celt uS cm uS m mS cm mS m Factor K 0 01 0 125 25 C 0 12 500 25 C 0 0 125 25 C 0 12 5 25 C K 0 1 0 1 250 O 25 C 0 125 000 25 C 0 1 25 25 C 0 125 25 C K 1 0 10 12 500 25 C 0 01 12 5 25 C 1 1 250 25 C K 2 0 20 25 000 25 C 0 02 250 25C 2 2 500 25 C K 10 0 100 125 000 25 C 0 1 125 25 C 10 12 500 25 C K 20 0 200 250 000 25 C 0 2 250 25 C 20 25 000 O 25 C An input is also provided for a temperature sensor for automatic temperature compensation The PM4 can accept 1000 RTD 10000 RTD LM335 or 100Q thermistor type temperature sensors The temperature sensor input or default temperature setting is common to both input channels The default display can be set to either resistivity or conductivity the display will toggle betw
17. AMALGAMATED INSTRUMENT CO PTY LTD PM4 2CO Dual Input Conductivity Resistivity Process Monitor Controller Operation and Instruction Manual Unit 5 28 Leighton Place Hornsby Telephone 61 2 9476 2244 NSW 2077 AUSTRALIA Facsimile 61 2 9476 2902 ACN 001 589 439 e mail sales aicpl com au Internet www aicpl com au Table of Contents Introduction 66 6 RA E A A A A 3 INPUIS SOUIDUIS gt 22 par AA ee hee eRe eS Me Eee 4 Mechanical Installation 2 1 ee 5 Cell Installation a eG AR A a 6 Electrical Installation lt lt 7 Probe Connections 8 Hardware Configuration 2nce eo eae oe ke eee da se 10 Explanation of Functions 1 66 eee 11 Function Table For Fully Optioned Instrument 20 Calibration Conductivity Resistivity amp Temperature 22 Conductivity Resistivity Calibration Null 22 Conductivity Resistivity Calibration o 22 Low conductivity high resistivity calibration 24 Temperature Calibration Null 25 Temperature Calibration oaoa a a a 20 a a 25 Conductivity or Resistivity Uncalibration 25 Temperature Uncalibration 6 aoa oa aa a a a 25 ppm Calibration s s e oe e ri Be Eee ee eee we 26 Input Output Configuration sosoo 2
18. DEC or 2A HEX addresses unit 10 Page 15 of 30 PM42COMA 1 6 0 Function Range Description d3 GP b ne Digital output operating mode seen only with digital output option Refer to the bn separate PM4 Panel Meter Optional Output Addendum booklet supplied when b SEt this option is fitted or bed Select from b ne signed binary output b n unsigned binary output b SEL scaled binary output bed BCD output d3 0P Fi aor Output polarity seen only with digital output option Refer to the separate PM4 AH Panel Meter Optional Output Addendum booklet supplied when this option is fitted Select either R a active low output or AH active high output bed D to BCD start display position seen only with digital output option Refer to the Skrt number separate PM4 Panel Meter Optional Output Addendum booklet supplied when of this option is fitted display This function affects BCD mode only and determines the number of digits to skip digits when outputting from the display Select from 0 to number of display digits minus minus 4 4 e g for a 6 digit display you may select 0 to 2 if 2 is selected then the four left most digits will be output d 3 Any Scaled digital output low reading seen only with digital output option Refer to display the separate PM4 Panel Meter Optional Output Addendum booklet supplied value when this option is fitt
19. PM42COMA 1 6 0 Example Entering FRE mode to change alarm 1 high function A iH from GFF to 50 Press amp release B Press release Press amp release gt EUNE gt gt R IH gt OFF gt A Bui ume ye U B on mm Press amp release Press amp release mmr ta FUNC End Example Entering CAL mode to change decimal point dE Ft function from amp to 8 8 Switch off Press amp hold Switch on r A gt gt gt instrument instrument Hold B until gt LIL Release Press amp release A rw Press amp release Press amp release gt case p d pa E gt gt then press PU MT B until L B until mm Press amp release Press amp release mmr ac aaa FUNE gt End The alarm brightness retransmission and bargraph functions below are accessible via FUNE mode Note that x in the alarm functions is used to indicate any alarm number e g if 3 setpoint alarm relays are fitted then A Lo Re to and A3 L a will all seen as functions on the display Each alarm may be set to follow channel 1 channel 2 percent rejection or temperature see Ax function for details Function Range Description Axto Any Alarm low setpoint displays and sets the low setpoint value for the designated display alarm relay The low alarm setpoint may be disabled by pressing the B and hd value pushbuttons simultaneously When the alarm is disabled the display will indicate GFF Use amp or M to adjust the setp
20. al Installation Acceptable Acceptable NOT acceptable Acceptable Acceptable but not ideal method slightly recessed caution avoid for horizontal for clean water for clean water air pocket installation with no sediment with no sediment TBTH and TBTHHT cells are suitable for installation into metallic and non metallic pipework The cell measurement is made on the inside of the cell body ensuring it is virtually unaffected by the surrounding sample or volume The cell may be mounted in a horizontal or vertical position and is usually installed into a modified T fitting The cell will provide a reliable and stable reading as long as there is a flow through the cell 0 8 Figure 2 Modified T fitting Ideally the cell should be installed into an elbow elbow installation installation with the flow entering the cell at the base opening and exiting from the holes around the perimeter see figure 2 This method will provide a fast response Alternatively the cell may be installed across the flow as shown in figure 3 note this is not recommended for K 10 cells This will provide a stable and accurate measurement but the response time will be slower In most applications this will not present a problem TBTH and TBTHHT cells are also suitable for installation into sample flow lines These are usually installed in a flow bypass or a sample to waste arrangement Sample line
21. ds before reset pH da FAxn oorAxn e Alarm x action N O or N C Axn o0r Axn c Axn a O br SE Display brightness Gto 5 i cr EC First analog output low limit Value in memory Ga rEC First analog output high limit Value in memory 0060 bAr Bar graph low reading Value in memory pH bAr Bar graph high reading Value in memory HH The functions below are accessible only via CA mode bAr t YPE Bar graph operation mode bAr 5 dot d dot or E bAr bAr Che Channel 2 on or off on or GFF an drnd Display rounding to5000 i Chi dCPe Decimal point seting O O 1 0 02 etc o for channel 1 Ch2 dEPE Decimal point setting 9 D 1 0 02 etc o for channel 2 Fler Digital filter range 0 to 8 Gto amp 8 most filtering 2 305 600 i200 2400 B00 bAud Baud rate Q600 19 20r 38 4 9600 Prey Parity select NONE EUEN or Odd AGE Output d SP Coant POLL A boS or sii continuous or controlled A buS fane Addr Address Value in memory d9 0P Digital output type b a b na b S5SCLOor bed b ng d9 0P Digital output polarity A aor AH Po bed Sere BCD Mode start display Value in memory pH Digital output low reading d 3 signed binary mode Value in memory Gg Digital output low reading d 3 signed binary mode Value in memory 050 NONE 05 005 or b E tYPE Temperature probe type L335 amp DD or25d 1335 dEF E Default temperature Gtoe50o es SOL SLPE Solution temperature slope 6 00t0o 0 00 2 00 Sat eL Solution temperature 5 5 to 50 0 25 3 pr EA
22. e it will cause errors in the measurement If oil grease or any insulating material is allowed to build up on the electrode surface measurement errors will also occur J TBPS cells are suitable for installation into non metallic pipework Ideally the cell should be installed from the side of the fitting as shown in figure 1 This method is less likely to be subjected to trapped air The T fitting should be modified to allow the face of the cell to be flush with the inside of the fitting or pipe wall It is acceptable for the cell to be slightly recessed when the cell is installed from the side of the fitting Alternatively a BSP hole may be drilled threaded into the side of a fitting such as an existing elbow or T fitting Itis acceptable to install the cell from the top or bottom of the pipe or fitting provided care is taken to prevent air pockets or In applications where the pipe diameter is less than 50mm the reduced sample volume around the cell electrodes may affect a E the accuracy of the reading In these applications in line calibration correction is recommended For installation into the side wall of a tank vessel etc the information above applies Figure 1 Ideal Installation method build up of sediment eau PE Modified t fitting Modified t fitting for in line flow elbow installation horizontal or vertical horizontal or vertical Ide
23. e reading i e if the cell is calibrated outside its normal installation position the calibration may inaccurate once the cell is installed due to the effect on conductivity paths in the pipe Ideally calibration should take place with the cell in its normal measuring position and a calibration reference cell amp display mounted close to this cell but not so close as to electrically interfere If this is not possible and the cell has to be removed for calibration then the best way to avoid contamination is to put flowing product solution into the bottom of a container and allow it to flow over the side The cell is then placed in the solution as shown in the diagram below If possible cover top of beaker to reduce air contact Flow to waste Product solution Note that when a resistivity display is being used and calibration using high resitivity solutions is required the PM4 2CO should be set to display conductivity rather than resistivity using the SE amp d SP function The calibration should then take place as a conductivity calibration and when calibrated the display set back to read resistivity This procedure is necessary since the resitivity null calibration value is too close to high resitivity solution values to give an accurate calibration slope The conversion formula is Conductivity 1 resistivity x K factor e g for 16MQ resistance and a K 0 1 cell Conductivity 1 16000000 x 0 1 0 006 uS cm or 6 uS m Page 24 of 30
24. ed Accepts any valid display value Determines the low startpoint for the b 5EL mode and has no affect on other modes d 37 Any Scaled digital output low reading seen only with digital output option Refer to display the separate PM4 Panel Meter Optional Output Addendum booklet supplied value when this option is fitted Accepts any valid display value Determines the high startpoint for the 6 S amp 2 mode and has no affect on other modes OCEYPE AGRE Temperature probe type displays and sets the temperature probe type used 55 Selections available are RGRE no temperature probe 88 1000 RTD G amp G 855 10002 RTD 335 LM335 amp 188 1000 thermistor or 25 4 UUB25J1 type 335 thermistor Hardware links must also be set to suit the probe type used See the t 3G Hardware Configuration and Electrical Installation chapters Temperature or compensation is common to both input channels e the temperature sensor 25 4 input will be applied to both channel 1 and channel 2 for temperature compensation dEF OE ct Default temperature displays and sets the default temperature for manual mc co compensation when E YPE is set to NORE Range is 0 0 to 200 0 C This is the temperature value which will be used for compensation if no temperature sensor is used The value is common to both input channels Page 16 of 30 PM42COMA 1 6 0 Function Descriptio
25. een channel 1 channel 2 percent rejection and temperature indication by pressing either the ZY or M button The default display is channel 1 the instrument will revert to this display after switch on and will automatically revert to channel 1 after approx 1 minute if the display has been toggled to a different value When a display other than channel 1 is viewed a message will flash approximately every 8 seconds to indicate what value is being displayed e g Eh 2 will flash prior to channel 2 reading Pe r Js prior to percent rejection and prior to the temperature The conductivity display units can be set to show either milliSiemens per metre milliSiemens per centimetre microSiemens per metre or microSiemens per centimetre The resistivity display is in MQ The percent rejection display is calculated from the following formula Rejection oes 0s x 100 oes Where C2 channel 2 input is inlet feed conductivity in uS cm C1 channel 1 input is outlet product conductivity in uS cm 0 65 converts inlet conductivity to TDS total dissolved solids 0 5 converts outlet conductivity to TDS Calibration setpoint and other set up functions are easily achieved by push buttons located at the rear panel or front panel depending on model A standard inbuilt relay provides an alarm control function additional relays retransmission and DC output voltage may also be provided Unless otherwise specified at the time of order your PM4 has bee
26. es of electrical noise such as motors generators fluorescent lights high voltage cables bus bars etc An IP65 access cover which may be installed on the panel and surrounds is available as an option to be used when mounting the instrument in damp dusty positions A wall mount case is available as an option for situations in which panel mounting is either not available or not appropriate A portable carry case is also available as an option for panel mount instruments Prepare a panel cut out of 45mm x 92mm 1 mm 0 mm see diagram below Insert the instrument into the cut out from the front of the panel Then from the rear of the instrument fit the two mounting brackets into the recess provided see diagram below Whilst holding the bracket in place tighten the securing screws being careful not to over tighten as this may damage the instrument Hint use the elastic band provided to hold the mounting bracket in place whilst tightening securing screws Vertical mounting bar graph displays Horizontal mounting 45mm A 92mm gt i PANEL ae 45mm PANEL CUT OUT ANE 92m OUT 9 5mm Mounting bracket max 2 off Ss l jam 10mm Page 5 of 30 PM42COMA 1 6 0 2 1 Cell Installation When installing conductivity cells it is important to locate the cell in a position where the pipe is always completely full The cell electrodes must be in complete contact with the water sample If air is trapped around the cell electrod
27. essing and releasing the A push button until the required function is reached Changes to functions are made by pressing the or M push button in some cases both simultaneously when the required function is reached Entering CA Mode 1 Remove power from the instrument Hold in the A button and reapply power The display will briefly indicate CAL as part of the wake up messages when the EARL message is seen you can release the button Move to step 2 below 2 When the wake up messages have finished and the display has settled down to its normal reading press then release the 3 button Move to step 3 below 3 Within 2 seconds of releasing the 3 button press then release the and Y buttons together The display will now indicate Fung followed by the first function Note If step 1 above has been completed then the instrument will remain in this CA mode state until power is removed i e there is no need to repeat step 1 when accessing function unless power has been removed Page 11 of 30 Entering FUNE Mode No special power up procedure is required to enter FUNE mode Le YL 1 When the wake up messages have finished and the display has settled down to its normal reading press then release the 3 button 2 Within 2 seconds of releasing the 3 button press then release the and Y buttons together The display will now indicate Fung followed by the first function
28. g retansmission mode seen only when the analog retransmission option is che fitted Pe rd The analog retransmission option may be set to operate from either the channel or PE 1 channel 2 percent rejection or temperature values Note only the mode selected at the 5Ek BPE function or the temperature can be selected Select ch for channel 1 eh e for channel 2 Pe r J for percent rejection or PE for temperature Set the FEC and FEET functions to suit the output mode selected Note if set for conductivity resistivity then the output will go to full scale 20mA 1V or 10V if the display goes to overrange ar displayed If set for temperature retransmission an overrange display will cause the analog output to revert to the default temperature set at the EF F function i e if required the default temperature can be set to a value which will give required analog output if an overrange e g open circuit occurs bAr ch Bargraph display mode seen only in bargraph instruments che The bargraph display may be set to operate from either the channel 1 channel 2 Per percent rejection or temperature reading Select eh for channel 1 ch e for or E channel 2 Pe rus for percent rejection or E for temperature This feature allows one display on the seven segment display and a separate display on the bargraph e g channel 1 on the seven segment display and rejection on the bargraph d3 5P ch Digital output mode seen on
29. he two segments When scaling the display use the bRr and bAr functions e g bAr 8 and bRr 88 will give a bargraph with the bottom two segments lit at a 7 segment display reading of amp and the top two segments lit with a 7 segment display reading of 88 Note this could also be set up as a centre zero single dot display by entering a negative value and positive value e g bAr GG bAre 80 bRr centre bar display The display will be a solid bargraph but will have its zero point in the middle of the display If the seven segment display value is positive the bargraph will rise If the seven segment display value is negative then the bargraph will fall Page 14 of 30 PM42COMA 1 6 0 Function Range Description bAr bAr When scaling the display use the bAr and bRr functions e g bAr 8 and EYPE S dot bAr 188 will give a bargraph with all the bottom half segments lit at a 7 continued d doat segment display reading of 88 and all the top segments lit with a 7 segment bRr display reading of a8 Che anor Channel 2 on or off this function should be set to an if both input channels are GFF required or set to GFF if only channel 1 is required drnd D to Display rounding displays and sets the display rounding value This value may O00 be setto B 5888 displayed units Display rounding is useful for reducing the units instrument re
30. ly when digital retransmission used Refer to the che separate PM4 Panel Meter Optional Output Addendum booklet supplied when Pe ru this option is fitted or E The digital retransmission may be set to operate from either the channel 1 channel 2 percent rejection or temperature reading Select eh for channel 1 eche for channel 2 Pe r us for percent rejection or 9 for temperature As with the Rx function the retransmission will operate on the selected mode even if the display is not in that mode Returning to the normal measure Mode Important When the calibration is complete it is advisable to return the instrument to the normal mode where calibration functions cannot be tampered with To return to the normal mode turn off the instrument power wait a few seconds and then restore power Page 19 of 30 PM42COMA 1 6 0 5 Function Table For Fully Optioned Instrument a a Default Record your Initial display Meaning of display Next display setting settings Axla Alarm x low setpoint value Setpoint value or GFF OFF age Ax Alarm x high setpoint value Setpoint value or GFF OFF D Hysteresis value JA See following AxHY Alarm x hysteresis in measured units ia fable a No of seconds See following EE plan p IME before relay trips E table Axre Alarm x reset time No of secon
31. measurement usually provides a slower response but has the advantage of allowing the cell to be removed without disturbing the process Page 6 of 30 horizontal or vertical Figure 3 gt PI Modified T fitting for in line flow horizontal or vertical yy TBTH cells only not suitable for TBLR cells PM42COMA 1 6 0 3 Electrical Installation The PM4 Panel Meter is designed for continuous operation and no power switch is fitted to the unit Itis recommended that an external switch and fuse be provided to allow the unit to be removed for servicing The terminal blocks allow for wires of up to 2 5mm to be fitted Connect the wires to the appropriate terminals as indicated below Refer to other details provided in this manual to confirm proper selection of voltage polarity and input type before applying power to the instrument When power is applied to the instrument an initial display of 8888 followed by other status displays indicates that the instrument is functioning MAINS EARTH AC NEUTRAL DC AC ACTIVE 11112113 DC COM N O RELAY 1 3 WIRE Instrument Rear Panel 1 MAINS EARTH OPTIONAL OUTPUTS 2 240VAC NEUTRAL 3 240VAC ACTIVE A OUTPUT V I 4 B_ OUTPUT V I 5 RELAY1 COM 6 RELAY1 N O 7 RTD
32. n ro LS SLPE Solution slope displays and sets the solution slope variable from 65 55 to 5 588 The solution slope gives the temperature coefficient of the solution measured as a per C this figure is needed since each individual solution s conductivity resistivity will vary differently with temperature A typical value is 2 per C Enter the solution value if known if the solution slope is not known then it can be obtained as follows 1 Set the slope setting to 0 00 per C 2 Place the cell into a sample of the process solution Measure the temperature of the solution or alter the temperature to a desired level this temperature is shown as T1 inthe formula below Allow the reading to stabilise and note the reading 3 Bring the solution up to a higher temperature and allow the reading to stabilise again note the reading 4 Use the formula below to calculate the solution slope i Conductivity or Resistivity at T1 4 fe 7 x 100 Conductivity or Resistivity atT2 Slope 5 Enter the result as the solution slope C3 og i c o Solution temperature displays and sets the solution temperature 77 to be used with the solution slope function above Wa 000n 00 a WV aa WA a EI EI 3 ED an Do Channel 1 probe constant displays and sets the channel 1 probe cell constant K number Values of 6 6 0 05 00 18 5 8 2 8 5 0 8 58 or DE may be selected Prb CASE
33. n factory set to a standard configuration Like all other PM4 series instruments the configuration and calibration are easily changed by the user Initial changes may require dismantling the instrument to alter PCB links other changes are made by push button functions Full electrical isolation between power supply conductivity resistivity cell and retransmission output is provided by the PM4 thereby eliminating grounding and common voltage problems This isolation feature makes the PM4 ideal for interfacing to computers PLCs and other data acquisition devices The versatile PM4 has various front panel options therefore in some cases the pushbuttons may be located on the front panel as well as the standard rear panel configuration Page 3 of 30 PM42COMA 1 6 0 1 1 Inputs amp outputs Input One or two conductivity cells and one temperature sensor Process units Alarm annunciator LEDs 5 digit LED display only E 7 m Conductivity mS cm 6 digit model Page 4 of 30 Setup pushbuttons allt AMALGAMATED INSTRUMENT CO 100 Bargraph plus 5 digit model Output 1 x setpoint relay Optional outputs Up to six extra setpoint relays Analog output single or dual Serial comms RS232 or RS485 BCD binary retransmission 75 50 25 0 PM42COMA 1 6 0 2 Mechanical Installation If a choice of mounting sites is available then choose a site as far away as possible from sourc
34. nd will reset when the display value falls below the setpoint this can result in repeated on off switching of the relay at around the setpoint value The hysteresis setting operates as follows In the high alarm mode once Deney vaie the alarm is activated the input must fall below the setpoint value minus the hysteresis gt gt 70a value to reset the alarm A A A eet Oe TA el e g if A tH is to 58 8 and minus Relay A IHY is setto 3 8 then the lis e setpoint output relay will or above E activate once the display value below this goes above 58 8 and will value reset when the display value goes below 47 8 gt 50 0 minus 3 0 Alarm high operation with hysteresis Time In the low alarm mode once Play Value the alarm is activated the input A must rise above the setpoint value plus the hysteresis id value to reset the alarm ce b h e g if R ito is to 28 8 and Ebo ee ia A IHY is setto 15 0 then te atthis value i plus or below the alarm output relay will AxHy o E ONE activate when the display E E eo E MO value falls below 28 8 and we mena Glspiay Alarm low operation with hysteresis Time value goes above 33 5 20 0 plus 10 0 The hysteresis units are expressed in displayed engineering units RAXee amp to 50 Alarm trip time displays and sets the alarm trip time and is common for both seconds alarm high and low setpoint values The trip time is the delay time before the alarm relay will activate or trip when an alarm
35. ns Weight 1 or 2 Conductivity Resistivity cells K 0 01 0 05 0 1 0 5 1 0 2 0 5 0 10 20 50 or 100 100Q RTD 10002 RTD LM335 100Q thermistor UUB25J1 thermistor or manual temperature setting 0 00 to 9999 uS cm or equivalent in mS cm mS m or uS m 0 00 to 18MQ and 40 to 120 C Better than 1 of full scale Each channel is sampled every 2 seconds 20 000 count Dual Slope integrating MC68HC11 CMOS LED 10 to 60 C LCD 10 to 50 C 5 to 95 non condensing 5 digit 14 2mm status LEDs 4 way keypad 6 digit 14 2mm 4 way keypad LED Bar Graph 20 segment bar 4 digit 7 6mm plus 3 way keypad LED Bar Graph 20 segment bar 5 digit 7 6mm relay status LEDs AC 240V 110V or 24V 50 60Hz or DC isolated wide range 12 to 48V Special supply types 32VAC 48VAC 50 60Hz or DC isolated 50 to 110V also available Note supply type is factory configured AC supply 4 VA max DC supply consult supplier depends on display type amp options 1 x relay Form A rated 5A resistive Programmable N O or N C One or three extra relays same specs as Relay 1 4 to 20mA 0 to 1V or O to 10V link selectable 4 to 20mA output can drive into 1kQ load maximum RS232 or RS485 selectable for ASCII or Modbus RTU Binary or BCD retransmission 16 bits PNP or NPN factory configured 12VDC 24VDC standard or link selectable 5VDC 10VDC 20mA maximum current output DIN 48mm x 96mm x 10mm 44mm x 91mm x 120mm behind face of panel 4
36. oSiemens per metre Select 45 e to display in milliSiemens per centimetre Select AS A to display in milliSiemens per centimetre UCAL n a Channel 1 uncalibration used to set the channel 1 conductivity or resistivity Chi calibration back to the factory calibration values This function should only be used when calibration problems exist and it is necessary to clear the calibration memory UCAL n a Channel 2 uncalibration used to set the channel 2 conductivity or resistivity Che calibration back to the factory calibration values This function should only be used when calibration problems exist and it is necessary to clear the calibration memory uUCAL OC na Temperature probe uncalibration used to set the temperature probe calibration back to the factory calibration values This function should only be used when calibration problems exist and it is necessary to clear the calibration memory SEt cand Set default display the default display can be set to either pS and cdi SP or or resistivity F St Select the default display required via the or M buttons FESE P buk none button function displays and sets the operation of the front panel 2 push H button Leor The functions available are Hi Lo NGNE no function pressing the GQ button has no effect H peak memory display will show the highest reading in memory from the time the instrument was last switched on The function will time out after 20 seconds and return to normal meas
37. oint value if required The alarm will activate when the displayed value is lower than the setpoint value Each relay may be configured with both a low and high setpoint if required if so the relay will be activated when the display reading moves outside the band set between low and high setpoints AH Any Alarm high setpoint displays and sets the high setpoint value for the designated display alarm relay The high alarm setpoint may be disabled by pressing the ZY and MW value pushbuttons simultaneously When the alarm is disabled the display will indicate GFF Use A or M to adjust the setpoint value if required The alarm will activate when the displayed value is higher than the setpoint value Each relay may be configured with both a low and high setpoint if required if so the relay will be activated when the display reading moves outside the band set between low and high setpoints Page 12 of 30 PM42COMA 1 6 0 Function Range Description AXHY Gto Alarm hysteresis deadband displays and sets the alarm hysteresis limit and is 9999 common for both high and low setpoint values The hysteresis value may be units used to prevent too frequent operation of the setpoint relay when the measured value stays close to the setpoint Without a hysteresis setting RxHY set to zero the alarm will activate when the display value goes above the alarm setpoint for high alarm a
38. onal Output Addendum booklet supplied when this option is fitted value Displays and sets the analog retransmission 4 to 20mA 0 1V or 0 10V output low value 4mA or OV in displayed engineering units e g if a 4mA output is required for a display value of O then FEE should be set to G The retransmission output can be set to follow channel 1 channel 2 percent rejection or temperature see EE function for details FEE Any Recorder retransmission output high value refer to the separate PM4 Panel display Meter Optional Output Addendum booklet supplied when this option is fitted value Displays and sets the analog retransmission 4 to 20mA 0 1V or 0 10V output high value 20mA 1V or 10V in displayed engineering units e g if a 20mA output is required for a display value of 1000 then FE should be setto 208 bRr Any Bar graph display low value seen only in bargraph display instruments display Displays and sets the bar graph low value i e the value on the 7 segment display value at which the bargraph will start to rise This may be independently set anywhere within the display range of the instrument Note The bAr and bAr settings are referenced from the 7 segment display readings not the bargraph scale values The bargraph scale may scaled differently to the 7 segment display or may be set to display a different channel rejection or temperature see the bRr function bArT Any Bargraph display high value
39. resistivity must be at least 5 away from the null value Try calibration again with a higher conductivity or lower resistivity solution ensure than null calibration was correctly carried out CAL 9A N EFF calibration gain error The gain value after calibration was more than 10 times higher or lower than expected Possible causes are incorrect calibration procedure incorrect cell constant selection or faulty cell CALZ EFF calibration point 2 error See CAL 1 EFF CALE SPAM EFF calibration point 2 span error The second calibration point must be at least 5 times greater than the CA t point and at least 500uS cm or 10x less for resistivity Increase the conductivity resistivity of the solution to at least 500uS cm or decrease the resistivity by at least 10x and try again or recalibrate FAL ata lower value CALE 9A N EFF calibration point 2 gain error See CAL SAI EFF CALZ FeSt EFF calibration point 2 resistance error Indicates that the calibration resistance constant has been calculated at either a negative value ora value greater than 20Q i e excessive lead resistance Check cell connections and E AL e calibration procedure Note It is essential in conductivity measurement that the resistance across the cell is always greater than 800 If the resistance is less than this then it may be necessary to use a cell with a higher cell constant e g it may be necessary to change from K 0 1 to K 1 The resistance at any given
40. s fitted Select parity check to either nanE EYER or odd G P ut d SP Set RS232 485 interface mode only seen if serial communications option fitted Eant Refer to the separate PM4 Panel Meter Optional Output Addendum booklet or supplied when this option is fitted POLL Select d SP Cont POLL A buS orA buS Allows user to select the RS232 485 interface operation as follows d SP Sends image data from the display without conversion to ASCII Eant Sends ASCII form of display data every time display is updated GLtL Controlled by computer or PLC as host Host sends command via RS232 485 and instrument responds as requested R bw5 is a special communications mode used with Windows compatible optional PC download software Refer to the user manual supplied with this optional software A buS Modbus RTU protocol Addr Sto 3 Set unit address for polled POLL mode 0 to 31 only seen if serial communications option fitted Refer to the separate PM4 Panel Meter Optional Output Addendum booklet supplied when this option is fitted Allows several units to operate on the same RS485 interface reporting on different areas etc The host computer or PLC may poll each unit in turn supplying the appropriate address The unit address ranges from 0 to 31 DEC but is offset by 32 DEC to avoid clashing with ASCII special function characters such as lt STX gt and lt CR gt Therefore 32 DEC or 20 HEX is address 0 42
41. s fitted ii Ax Alarm mode for alarms 1 2 etc ch 1 ch Pe rd or E chi aioe as rec First analog retransmission ab tence Pard o ee a i mode bAr Bargraph display mode ch i ch Pe dor Sf chi Digital output a d53 5P re bio oda ch 1 eche Pe ru or SE chi Functions shown shaded on this table will be displayed only when those options are fitted Settings for relays record settings here A1 A2 A3 A4 Axl o RH AXHY Rxtt AXre RAxn o0rAxn c Ax Page 21 of 30 PM42COMA 1 6 0 6 Calibration Conductivity Resistivity a Temperature The PM4 2CO has provision for calibration slope and head resistance compensation conductivity resistivity calibration A null calibration feature see TAL MLL allows the probe to be referenced to the instrument at a zero conductivity level A null calibration should be undertaken before a single or two point calibration to ensure that the probe and instrument are matched Before calibrating the instrument it is also important to ensure that the correct cell constant has been chosen see PF bE CASE and Prb Cnt Eh ICAL orE hetAt forchannel 2 together withthe Eh MULE or The RULL function sets the calibration slope the Eh i CAL E or Ehe CAL E reading is used to compensate for head resistance When using a temperature probe temperature calibration is carried out within the Fist Lt and EAL PE functions ensure that the correct temperature probe type has been selected
42. see E EYPE and that the appropriate links have been set see the Electrical Installation chapter Calibration Functions To enter the calibration mode the instrument must be powered up and functions entered via AL mode as illustrated on the first page of chapter 4 Explanation of functions 6 1 Conductivity Resistivity Calibration Null Null calibration allows the conductivity resistivity cell to be referenced to the meter The instrument should be nulled before calibration To null the instrument the following procedure should be followed 1 If a temperauture compensation sensor is used check that the temperature reading is correct and calibrate the temperature reading if necessary see Temperature Calibration Null and Temperature Calibration sections in this chapter Also check that the 5G SL PE function is correctly set If no temperature sensor is being used check that the SG E function is set to the required default temperature 2 Clean the cell to be nulled in pure water dry the cell and place in air Allow time for the reading to stabilise 3 Enter the calibration mode and setup mode then step through the functions until Eh FUL or Che NULL is displayed 4 Press BM and M together the display will show a reading this reading will be taken as zero upon completion 5 Press la the display will show Fut t End When the instrument returns to normal measure mode the reading from the probe in air will be
43. solution without loss of accuracy in applications where it is undesirable to display to a fine tolerance e g if set to 10 the instruments will display in multiples of 10 En 5 Channel 1 decimal point selection displays and sets the decimal point for CPE G 4 channel 1 display Use the Z or M pushbuttons to set the decimal point position amp G2 or The display will indicate as follows amp no decimal point B 1 decimal point 6 883 place G G2 2 decimal point places or 8 883 3 decimal point places Che 5 Channel 2 decimal point selection displays and sets the decimal point for dEPE G i channel 2 display Other details are as per the Eh dEPE function 8 88 or 5 003 Fler Gto8 Digital filter displays and sets the digital filter value Digital filtering is used for reducing susceptibility to short term interference The digital filter range is selectable from Eto 8 where G none and amp most filtering A typical value for the digital filter would be 3 bRud DD to Set baud rate only seen if serial communications option fitted Refer to the 38 54 separate PM4 Panel Meter Optional Output Addendum booklet supplied when this option is fitted Select from 388 6833 236 2433 4600 9500 9 2 19200 or 38 4 38400 Prey nonE Set parity only seen if serial communications option fitted Refer to the separate EWUER PM4 Panel Meter Optional Output Addendum booklet supplied when this option or add i
44. tion slope CAL e compensates the calibration curve for head resistance Page 17 of 30 PM42COMA 1 6 0 Function Range Description Erie n a Null calibration null calibration allows the channel 2 probe to be referenced to PUL the instruments display value at zero conductivity See Calibration Conductivity Resistivity amp Temperature chapter for details Che n a Channel 2 calibration points displays and sets channel 2 calibration points See CRL Calibration Resistivity amp Temperature chapter for full details of setting up Che CAL i when used after TAL FULL sets the calibration slope CAL 2 CALE compensates the calibration curve for head resistance or nuLL n a Temperature probe null Null calibration allows the temperature probe to be referenced to the instruments display value with zero input See Calibration Conductivity Resistivity 8 Temperature chapter for details ERLOL n a Temperature probe calibration used to calibrate the temperature probe Ensure that correct temperature probe has been selected under the E EYPE function See Calibration Conductivity Resistivity 8 Temperature chapter for details cond w5 en Conductivity measuring units seen only if SEt d SP set to cand uwt Un Used to set the measuring units for conductivity measurement e Select wS e A to display in microSiemens per centimetre ASA Select 15 A to display in micr
45. tions cannot be tampered with To return to the normal mode turn off power to the instrument wait a few seconds and then restore power Page 26 of 30 PM42COMA 1 6 0 7 Input Output Configuration If you need to alter the input or output configuration proceed as follows 1 Remove the plug in terminals from the rear of the instrument 2 Remove 4 x self tapping screws from back cover remove back cover by pulling it away from the instrument P 3 Using a screwdriver loosen the earth screw which passes through the PCB then slide out the board or boards f Remove earth screw which passes through the case then slide out the printed circuit board 4 Configure the PCB links as required see appropriate chapter 5 Slide PCB back into the case 6 Re tighten the earth screw which passes through the PCB 7 Refit back cover and fix with the self tapping screws 8 Plug the terminal strips back into the rear of the instrument Page 27 of 30 PM42COMA 1 6 0 8 Specifications Technical Specifications Input Temperature Input Measuring Range Accuracy Sample Rate A D Converter Microprocessor Ambient Temperature Humidity Display Power Supply Power Consumption Output standard Relay Action Output Options Extra Relays Analog Retransmission Serial Communications Digital output Regulated DC supply Physical Characteristics Bezel Size Case Size Panel Cut Out Connectio
46. urement La valley memory display will show the lowest reading in memory from the time the instrument was last switched on The function will time out after 20 seconds and return to normal measurement H Lo display will toggle between the highest and the lowest reading in memory each time the G button is pressed The function will time out after 20 seconds and return to normal measurement SPRE RI Setpoint access sets the access to the alarm relays set points The following A 2 choices are available pl ES R 1 Allows setpoint access to alarm 1 only Ft i 2 Allows access to alarms 1 and 2 only A 1 3 Allows access to alarms 1 2 and 3 only etc up to the maximum number of relays fitted For this function to operate the remote input F A function must be set to 5P RE Page 18 of 30 PM42COMA 1 6 0 Function Range Description Ax eh Alarm mode the alarms setpoints may be set to operate from either the channel che 1 channel 2 percent rejection or temperature reading Select eh for channel Peru 1 eche for channel 2 Pe r us for percent rejection or PE for temperature or 2 The alarm will still operate on the selected mode even if the display is not in that mode e g if A tis set to PE and the display is showing a conductivity reading then the alarm 1 will still operate if the sensed temperature goes above the alarm 1 high setpoint or below the alarm 1 low setpoint rec ch Analo
47. y existing or future models of the unit as it may deem necessary without incurring any obligation to incorporate such modifications in units previously sold or to which this guarantee may relate This document is the property of the instrument manufacturer and may not be reproduced in whole or part without the written consent of the manufacturer This product is designed and manufactured in Australia Page 30 of 30 PM42COMA 1 6 0
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