Manual - Amalgamated Instrument Co Pty Ltd
Contents
1. LM335 RM4COMAN 2 3 0 11 of 44 3 3 Configuring the output board If changes to the link settings are required on the option board the circuit board will need to be removed from the case Remove the circuit board from the case following the instructions below Remove the connectors the four front bezel screws and the earth screw at the side of the case Hold the front bezel and slide out the circuit boards O 3 4 Temperature range link selection Dismantle the instrument as described in section 3 3 Insert the links into the appropriate location on the pin header to suit the sensor required LM335 temperature sensor selected wo oD v r sig Pt1000 1000 Ohm RTD temperature sensor selected lse Pt100 100 Ohm RTD 2 or 100 Ohm thermistor or UUB25J1 thermistor il temperature sensor selected 12 of 44 RM4COMAN 2 3 0 4 Function tables summary of setup functions Note the order in which the functions appear on the display may not be exactly as shown below The availability and order of functions is determined by choice of function settings and options fitted Functions in this first table are available in FURE or CAL mode Display Function Range Default Your Ref Page record Aria Low setpoint value for Any display GFF See 5 1 19 designated alarm relay x value or GFF 4 1 ArH High setpo2. Display br St Range ito i5 Default Value 5 Displays and sets the digital display brightness The display brightness is selectable from to iS 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 To set brightness level go to the br St function and use the amp or amp push buttons to set the value required then press to accept this value 5 8 Automatic brightness switching Display Gui to i5 C3 Range Default Value Displays and sets the level for automatic brightness switching To set dull level go to the duit function and use the amp or push buttons to set the value required then press I to accept this value The d oFF SECS function automatic display blanking or dulling will cause the dub L function to appear if the d oFF SEES function is enabled i e set to any value other than B When the d oF F SEES time is reached the display brightness will change from the level set at the br St function to the level set at the dut t function The brightness will automatically return to the br 9t level if any of the front pushbuttons are pressed or if an alarm relay is activated This function is useful in battery powered applications in that it can be used to reduce current consumption by dimming the display when the display is not being viewed 5 9 Auto display dimming timer Display d oFF SEC
3. CELL CELL Optional outputs See separate RTD options booklet GND if options are fitted Instrument label example AMALGAMATED INSTRUMENT CO PTY LTD mee 5 28 LEIGHTON PLACE BS HORNSBY 2077 PH 029476 2244 NSW AUSTRALIA FAX 02 9476 2902 2 2 8 N 123456789 A RELAY 1 B RELAY 1 N O C RELAY 2 com D RELAY 2 N O E MAINS EARTH F 240 VAC NEUTRAL CELL IN CELL 0UT 3W RTD 335 GND G 240 VAC ACTIVE AMALGAMATED INSTRUMENT CO Relay annunciator ap for up to 4 relays P ABb e e R E OOOO O oND e N N gt Power supply Active DC Neutral DC Relay 2 Earth Relay 1 RM4COMAN 2 3 0 9 of 44 3 2 Electrical connection examples If output options are fitted refer to the RM4 DIN Rail Meter Optional Output Addendum booklet for connection details Conductivity Resistivity ppm Cells The cell is connected to terminals 5 and 6 Terminal 5 is the input connection i e the current input from the cell Terminal 6 is the output connection If using a centre core type cell the centre core wire should be connected to Terminal 5 Ensure that the PF bE CMSE function has been correctly set for probe type A I C 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 C
4. 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 TAL fat a lower value RM4COMAN 2 3 0 41 of 44 e CALZ 9A N EFF Calibration point 2 gain error See CAL 9M NEFT e CALS FESt EFF Calibration point 2 resistance error Indicates that the calibration resistance constant has been calculated at either a negative value or a value greater than 209 i e excessive lead resistance Check cell connections and CAL e calibration procedure Note It is essential in conductivity measurement that the resistance across the cell is always greater than 802 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 conductivity level can be found from the formula 1 Resistance Ohms x K factor Conductivity em f 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 5002 Resist x 0 1 500h esistance a0 4 6 T ms 42 of 44 RM4COMAN 2 3 0 7 Specifications 7 1 Technical Specifications Input Temperature Input Measuring Range Accuracy Sample Rate A D Converter Microprocessor Ambient Temperature Humidity Display Power Supply
5. 9 Press Both and BS together a rmo temperature value will be displayed then press the GJ button The message PE MULL End should be displayed If any other message is seen refer to the Error Messages appendix 38 of 44 RM4COMAN 2 3 0 6 7 Temperature Calibration The temperature calibration is a single point calibration Place the temperature sensor in an accurately known temperature environment and allow to stabilise Enter the calibration CAL mode and step through the functions by pressing the GJ button until the display shows CAL PL Press the amp and amp simultaneously the display will show EAL PC followed by the live temperature reading Press the J button the display will now show P Now press the or amp button to set the correct temperature value then press the GJ button the display will read CAL 1End indicating that the calibration is complete If any other message is seen refer to section 6 13 6 8 Conductivity Resistivity ppm 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 J button until the display shows UCAL cand or UCAL TESE or UCAL PPA Press the A and M pushbuttons
6. Power Consumption Output standard Relay Action Conductivity cell K 0 01 0 05 0 1 0 5 1 0 2 0 5 0 10 or 100 100Q RTD Pt100 10002 RTD Pt1000 LM335 1002 thermistor UU25J1 thermistor or manually set Conductivity uS cm mS cm mS m or uS m ranges selectable Range depends on cell sensitivity K factor see page 3 Resistivity up to 18M9 Temperature 40 to 120 C Better than 1 of full scale 1 per sec 20 000 count dual slope integrating MC68HC11F1FN CMOS LED 10 to 60 C LCD 10 to 50 C 5 to 95 non condensing LED 5 digit 7 6mm with alarm annunciator LEDs AC 240V 110V or 24V 50 60Hz or DC isolated wide range 12 to 48V Note supply type is factory configured AC supply 4 VA max DC supply consult supplier typical 80mA at 24VDC 160mA at 12VDC depends on sensor and options 1 x relay Form A rated 5A resistive Programmable N O or N C 7 2 Optional outputs Third relay Fourth relay Analog output Rated 0 5A resistive 30VAC or DC May be configured as form A or form C if the third relay is the only option fitted Rated 0 5A resistive 30VAC or DC form A Isolated 4 to 20mA 0 to 1V or 0 to 10V link selectable 12 or 16 bit versions available 4 20mA will drive into resistive loads of up to 8009 The analog output is configurable for retransmission or PI control Dual analog version also available two isolated analog output channels 12 bit The first analog output is configurable for
7. approximately 20 seconds before returning to live display readings alternatively the display can be forced to return to live measurement by pressing the GJ To reset the peak memory hold the Q pressed for 3 seconds or remove power to the display e La Valley memory Operates in the same manner as the H function above but operates on the lowest value in memory The indicator P La will be seen prior to the valley memory value e H La Peak valley memory Operates in the same manner as the H and Lo memories but allows toggling between high and low values i e press once momentarily to view peak 30 of 44 RM4COMAN 2 3 0 high and again momentarily to view peak low 5 39 Access mode Display REE Range DFF ERSY AGNE or ALL Default Value GFF Access mode the access mode function REES has four possible settings namely GFF ERSY MORNE and ALL If set to GFF the mode function has no effect on alarm relay operation If set to ERSY the easy alarm access mode will be activated Refer to Easy alarm relay adjustment access facility page 18 If set to MORE there will be no access to any functions via FURIE mode entry via AL mode must be made to gain access to alarm and calibration functions If set to ALL then access to all functions including calibration functions can be gained via FURIE mode 5 40 Setpoint access mode Display SPRE Range A LRA i 2 etc Default Value Fi Setpoint access seen only if
8. repeated If required a second point AL Z may now be taken The second calibration point is normally used only to compensate for head resistance when long cell cables are used or to improve linearity when measuring over a wide conductivity range In many installations the second point is not require If the second point is required move on to step 6 if this is not required simply press and release until the FUNE End message is seen or press QJ to escape to normal measurement mode 6 Clean the probe in pure water then insert into a second solution of known conductiv ity resistivity ppm the second solution must be at least 500uS cm higher or 10x lower for resistivity or 500 ppm higher 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 or 500 ppm in the process you are using 7 Press and M together the display will show a value with CAL 2 flashing every few seconds Allow time for this reading to stabilise typically 20 seconds 8 Press and release GJ the display will show a value with SEL flashing every few seconds 9 Adjust the value displayed to the known solution value using the Z and amp pushbuttons 10 Press and release GJ the display will show EAL End to indicate that calibration is complete Note If the range you are using does not allow for a 500uS cm difference or 10x difference for resistivity or 500 ppm between CAL and C
9. retransmission or PI control Serial communications Isolated RS232 RS485 or RS422 ASCII or Modbus RTU Some combinations of optional outputs are available e g analog output plus extra relay Consult supplier for available combinations RM4COMAN 2 3 0 43 of 44 7 3 Physical characteristics Case size 44mm w x 91mm h x 141mm d Connections Plug in screw terminals max 2 5mm wire for power and relays max 1 5mm wire for load cell and options Weight 470 gms basic model 500 gms with option card 8 Guarantee and service The product supplied with this manual is guaranteed against faulty workmanship for a period of two 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 de faced 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 manu facturer 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 g
10. sets the alarm relay hysteresis limit for the designated relay x Note x will be replaced by the relay number when displayed e g A IH for relay 1 To set a relay hysteresis value go to the RAcHY function and use the amp or M push buttons to set the value required then press I to accept this value The hysteresis value is common to both high and low setpoint values The hysteresis value may be used to prevent too frequent operation of the relay when the measured value is rising and falling around setpoint value e g if A IH is set to zero the alarm will activate when the display value reaches the alarm setpoint for high alarm and 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 the alarm is activated the input must fall below the setpoint value minus the hysteresis value to reset the alarm e g if AGH is to 55 5 and A H4 is set to 3 2 then the setpoint output relay will activate once the display value goes to 5 amp 8 or above and will reset when the display value goes below 71 i e at 46 49 or below In the low alarm mode once the alarm is activated the input must rise above the setpoint value plus the hysteresis value to reset the alarm e g if A to is to 24 8 and A iY is set to D D then the alarm output relay will activate when the display value falls to 28 3 or below a
11. solvent ions which become prevalent at low conductivity These ions have an effect on water conductivity resistivity since they have different temperature compensation curves to water When set to H G the a dry cell will give a display reading of 0 05uS cm if 2 decimal point places are selected 5 24 Display null calibration Display CRL AULL Range n a Default Value n a This function allows the conductivity cell to be referenced to the instruments display value at zero conductivity See section 6 3 for details 5 25 First calibration scaling point Display CAL i Range Any display value Default Value n a First scaling point for 2 point calibration scaling See Calibration chapter section 5 26 Second calibration scaling point Display CALZ Range Any display value Default Value n a Second scaling point for 2 point calibration scaling See Calibration chapter section 5 27 Temperature null calibration r mob OF D EUS n Display Range n a Default Value n a This function allows the temperature sensor output to be referenced to the instruments null value using short circuit input See section 6 6 for details RM4COMAN 2 3 0 27 of 44 5 28 Temperature calibration Display CAL OC Range n a Default Value n a This function is used to calibrate the temperature sensor See section 6 7 for details 5 29 Conductivity measuring units Display cond uw E Range uwS cA uS A ASCA ASA Default
12. to be retransmitted Analog outputs can be set for linear or logarithmic up to 5 decades output The RM4 series of DIN Rail Mount Monitors are designed for high reliability in industrial applica tions The high brightness LED display provides good visibility even in areas with high ambient light levels A feature of the RM4 is the programmable display brightness function This allows the unit to be operated in low display brightness to reduce power consumption and improve readability in darker areas To reduce power consumption in normal use the display can be programmed to automatically blank after a set time When the display has blanked it can be returned to normal brightness by pressing any of the front pushbuttons and it will also return to normal brightness if a relay becomes activated 1 1 Output options e Third relay rated 0 5A resistive 30VAC or DC May be configures as form A or C if the third relay is the only option fitted e Fourth relay rated 0 5A resistive 30VAC or DC form A e Isolated analog retransmission 12 or 16 bit versions available configurable for 4 20mA 0 1V or 0 10V The analog output is configurable for retransmission or PI control 4 of 44 RM4COMAN 2 3 0 Dual isolated analog retransmission 12 bit configurable for 4 20mA 0 1V or 0 10V The first analog output is configurable for retransmission or PI control Isolated RS485 or RS232 serial communications ASCII 8 bit or Modbus RTU Isolated Digital o
13. whose limits are set by the FEC and FEET functions Choose oF for a logarithmic output with 1 decade Lao for a logarithmic output with 2 decades etc up to La 3S for 5 decades See below for an example Example Four decade logarithmic curve with FEE La 0 1 Output mA o hs 3 B ol e zo 0 1 0 3 1 0 10 0 100 0 1000 0 Example The first decade runs from 0 1 to 1 0uS cm Because there are 4 decades in this example this gives a change of 4mA per decade If the reading of 0 1uS cm gives an output of 4mA and the reading of 1 0 uS cm gives an output of 8mA then a reading of 0 3uS cm will give an output of 5 9mA calculated from mA output final mA value for that decade log 9 1 0 log 0 3 x mA change per decade mA output 8 l0g401 0 109490 3 x 4 mA output 8 0 0 523 x 4 mA output at 0 3uS cm 5 9mMA i e the value is 52 3 below the end of decade value with 100 being 4mA Similarly the mA output at a display reading of 600 0uS cm would be mA output 20 log 91000 0 logy 600 0 x 4 x 4 19 1mA RM4COMAN 2 3 0 33 of 44 5 45 Analog output logarithmic start point Display FECLoa Range 6 05 150 0 1 0 1 Gor ta Default Value amp 8G Analog retransmission logarithmic output low starting point Seen only when the analog retrans mission option is fitted and not applicable unless FEC ctr t is set to GFF Sets the low starting point 4mA or OV output for the first decade of the logarithmi
14. 00 000 1002 K 10 0 10 10 000 1 000 000 1 0009 K 10 0 1 1 000 100 000 10 0009 K 1 0 10 10 000 1 000 000 1002 K 1 0 1 1 000 100 000 1 0009 K 1 0 0 1 100 10 000 10 0009 K 1 0 0 01 10 1 000 100 0009 K 0 1 1 1 000 100 000 10Q K 0 1 0 1 100 10 000 1 0009 K 0 1 0 01 10 1 000 10 0009 K 0 1 0 001 1 100 100 0009 6 11 Standard ppm conversion factors The PPAFREE ppm factor function value is used with the input from the cell to calculate the ppm value of the solution concerned The displayed ppm figure is calculated from ppm conductivity uS em x PPmF ACt The factor will vary with the composition and concentration of the solution being measured Sug gested ppm factors for four standard solutions are given below The suggested factors are based on conductivities of approx 14 000 uS cm at 25 C For example the default setting for the instrument is 0 560 which is a figure used for NaCl sodium chloride solution or salt water Standard solution Use Suggested PPAFRACE value NaCl Salt water and dairy products 0 560 442 General fresh water e g 40 sodium sulphate rivers lakes and reverse 0 860 40 sodium bicarbonate osmosis water 20 sodium chloride Can be used in applications a NaCl standard is used but KCL is normally used as a 0 580 conductivity standard rather than ppm standard CaCO3 Boiler and cooling tower water 0 480 Returning to the normal measure mode When the calibration procedu
15. ALZ then you should use the Null Calibration and EAL only The solution used for RL should be as close as possible to the highest value you will be using SCL2 CAL2 Display Value SCLI SaaS SSS CALI NULL Input RM4COMAN 2 3 0 37 of 44 6 5 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 and other contaminants Conductivity standard solutions of low conductivity can also be affected by exposure to air over a period of time The installation conditions such as pipe diameter and material can affect the 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 and 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 Note that when a resistivity display is required and
16. C K 0 5 10 6 250 25 C 1000 625 000 25 C 0 01 6 25 25 C 1 625 Q 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 25 25 C 2 2 500 25 C K 5 0 50 62 500 25 C 0 05 62 5 25 C 5 6 250 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 25 C K 50 0 500 625 000 25 C 0 5 625 25 C 50 62 500 25 C K 100 0 7 1 0 1250 25 C 100 125 000 25 C A second input is provided for a temperature sensor to be used for automatic temperature com pensation The RM4 CO can accept 100Q RTD Pt100 1000Q RTD Pt1000 LM335 or 1000 thermistor or UU25J1 thermistor type temperature sensors The default display can be set to either resistivity conductivity ppm or by weight of Sodium Chloride The display will toggle between temperature conductivity or temperature resistivity or temperature ppm or temperature NaCl indication by pressing either the or amp button 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 RM4COMAN 2 3 0 3 of 44 Input Optional outputs Extra relay Two extra relays 12 or 24V isolated transmitter supply Conductivity cell Te
17. Cut the DIN rail to length and install where required To install the instrument simply clip onto the rail as shown below To remove the instrument lever the lower arm downwards using a broad bladed screwdriver to pull the clip away from the DIN rail m 44mm o 141mm OOOOOOGO mw 23456789 ia ABCDEFG O00 OOOO mas 8 of 44 RM4COMAN 2 3 0 3 Electrical installation 3 1 Electrical installation The RM4 Meter is designed for continuous operation and no power switch is fitted to the unit It is recommended that an external switch and fuse be provided to allow the unit to be removed for servicing The plug in screw type 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 connection details provided in this chapter to confirm proper selection of voltage polarity and input type before applying power to the instrument When power is applied the instrument will cycle through a display sequence indicating the software version and other status information this indicates that the instrument is functioning Acknowl edgement of correct operation may be obtained by applying an appropriate input to the instrument and observing the reading The use of screened cable is recommended for signal inputs For connection details of optional outputs refer to the separate RM4 Din Rail Meter Optional Output Addendum booklet supplied when options are fitted
18. Model RM4 CO Conductivity Resistivity ppm DIN Rail Mount Display Controller Operation and Instruction Manual AMALGAMATED INSTRUMENT CO PTY LTD ACN 001 589 439 Unit 5 28 Leighton Place Hornsby Telephone 61 2 9476 2244 e mail sales aicpl com au NSW 2077 Australia Facsimile 61 2 9476 2902 Internet www aicpl com au Table of Contents 1 Introduction 2 Mechanical installation 3 Electrical installation 4 Function tables summary of setup functions 5 Explanation of functions 6 Calibration 7 Specifications 8 Guarantee and service 2 of 44 13 17 36 43 44 RM4COMAN 2 3 0 1 Introduction This manual contains information for the installation and operation of the RM4 Conductivity Resistivity ppm Monitor The RM4 CO is a general purpose auto ranging monitor which may be configured to accept an input from a range of conductivity cells with cell constants ranging from K 0 01 to K 100 Ranges and typical cell factors are shown in the table below Note that the RM4 CO can only display 5 digits so mS cm or mS m ranges may have to be used at higher conductivities Cell Range Guide Cell K 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 05 0 625 25 C 0 62 500 25 C 0 0 625 25 C 0 62 5 25 C K 0 1 0 1 250 25 C 0 125 000 25 C 0 1 25 25 C 0 125 25
19. Press amp release md Press amp release gt gt g ha a gt Lge th until E P B until nm Press amp release Press amp release um ogam geh O or B until RE Ful E 5d End Easy alarm relay adjustment access facility The display has an easy alarm access facility which allows access to the alarm setpoints simply by pressing the I button at the front of the instrument The first setpoint will then appear and changes to this setpoint may be made to this setpoint via the ZY or M buttons Press the 8 button to accept any changes or to move on to the next setpoint Note this easy access also functions in the same manner for the PI control setpoint relay and or analog PI output if PI control is available The instrument must be set in the manner described below to allow the easy access facility to work 1 The F RP function must be set to SPRE or the RAEES function must be set to EASY 2 At least one alarm must have a setpoint nothing will happen if all the alarm setpoints are set to GFF 3 The SPRE function must be set to allow access to the relays required e g if set to A t 2 then the easy access will work only with alarm relays 1 and 2 even if more relays are fitted 4 The instrument must be in normal measure mode i e if the instrument is powered up so that it is in EAL mode then the easy access will not function If in doubt remove power from the instrument wait for a few seconds then apply power again 5 If the easy ac
20. S Range D to 939999 Default Value amp This function allows a time to be set after which the display brightness set by the or S amp function will automatically be set to the level set at the dut L function The auto dimming feature can be used to reduce power consumption The function can be set to any value between O and 9999 seconds A setting of disables the auto dimming The display brightness can be restored by pressing any of the instruments front push buttons The display brightness will also be restored whilst one or more alarm relays is activated In normal display mode i e not in EAL mode there is a 2 minute delay period after the instrument is switched on during which the automatic display dimming will not operate If any of the front pusbuttons are pressed during this period this 2 minute delay will be canceled 22 of 44 RM4COMAN 2 3 0 5 10 Analog output option low value Display FEE Range Any display value Default Value amp Seen only when analog retransmission option fitted Refer to the separate RM4 Din Rail Meter Optional Output Addendum booklet supplied when this option is fitted for wiring details and link settings Displays and sets the analog retransmission 4 20mA 0 1V or 0 10V link selectable output low value 4mA or 0V in displayed engineering units To set the analog output low value rer go to the FEE function and use the or amp push buttons to set the required value then press G to
21. The cell will provide a reliable and stable reading as long as there is a flow through the cell Ideally the cell should be installed into an elbow installation with the flow entering the cell at the base opening and exit ing from the holes around the perimeter This method will provide a fast response Alterna tively the cell may be installed across the flow not suitable for TBLR type cells or K 10 0 TBTH cells This will provide a stable and ac curate measurement but the response time will be slower In most applications this will not present a problem These 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 measurement usually provides a slower response but has the advantage of allowing the cell to be removed without disturbing the process RM4COMAN 2 3 0 Modified t fitting elbow installation horizontal or vertical TBTH cell shown Modified t fitting elbow installation horizontal or vertical TBLR cell shown Modified t fitting for in line flow horizontal or vertical TBTH cell shown Not suitable for TBLR cells 7 of 44 2 Mechanical installation The instrument is designed for DIN rail mounting The instrument clips on to 35mm DIN standard rails EN50022
22. Value u5S cA Selects the conductivity measuring units to be displayed seen only if SE amp d SP set to cand Choices available are e w5 cA to display in microSiemens per centimetre uS cm e w5 A to display in microSiemens per metre uS m e A5S cA to display in milliSiemens per centimetre mS cm e A5 A to display in milliSiemens per metre mS m Note that if the conductivity display units are changed the instrument must be recalibrated 5 30 Conductivity uncalibration Display UCAL cand Range n a Default Value n a This function is used to set the conductivity calibration back to the factory calibration values and will be seen only if the SE amp d SP function is set to cand This function should only be used when calibration problems exist and it is necessary to clear the calibration memory See section 6 8 for details 5 31 Resistivity uncalibration Display UCAL FESE Range n a Default Value n a This function is used to set the resistivity calibration back to the factory calibration values and will be seen only if the SE amp d SP function is set to FESt This function should only be used when calibration problems exist and it is necessary to clear the calibration memory See section 6 8 for details 28 of 44 RM4COMAN 2 3 0 5 32 ppm uncalibration Display UCAL PPA Range n a Default Value n a This function is used to set the ppm calibration back to the factory calibration values and will be seen only
23. accept this selection Example lf it is required to retransmit 4mA when the display indicates amp then select amp in this function using the or amp button 5 11 Analog output option high value Display rec Range Any display value Default Value 383 Seen only when analog retransmission option fitted Refer to the separate RM4 Din Rail Meter Optional Output Addendum booklet supplied when this option is fitted for wiring details and link settings Displays and sets the analog retransmission 4 20mA 0 1V or 0 10V link selectable output high display value 20mA 1V or 10V in displayed engineering units To set the analog output high value go to the FEET function and use the amp or M push buttons to set the required value then press to accept this selection Example If it is required to retransmit 20mA when the display indicates S then select S in this function using the or M button 5 12 Second analog output option low value Display Feo Che Range Any display value Default Value amp See FEE function 5 10 for description of operation 5 13 Second analog output option high value Display Feo Che Range Any display value Default Value BOD See FEET function 5 11 for description of operation Functions in this second table are available only in ZAL mode or if REES is set to ALL RM4COMAN 2 3 0 23 of 44 5 14 Display rounding Display drnd Range ito SEDD Default Value D
24. alter the filter level if required Note that the higher the filter setting the longer the display may take to reach its final value when the input is changed similarly the relay operation and any output options will be slowed down when the filter setting is increased To set the digital filter value go to the FLtEr function and use the amp or Md push buttons to set the required value then press I to accept this selection 24 of 44 RM4COMAN 2 3 0 5 17 Special blowdown dosing mode operation Display SGSE PEF d Range 5 to 500 Default Value amp Special dosing operation mode sets relay 1 operation period for special blowdown dosing pump operation mode This function can be set from 0 to 600 seconds This function will only be seen if function A fis set to dGSE Refer to the A A2 etc function for a description of operation of this special mode 5 18 Temperature sensor type Display Ol EYPE Range NONE 130 EG L335 amp iG or 25 i Default Value AGRE Temperature sensor type used note see also electrical link settings in chapter 3 Choices available are e NONE no temperature sensor used GG Pt100 temperature sensor used e OOU Pt100 temperature sensor used tL 335 LM335 temperatures sensor used e amp DD 100Q thermistor sensor used e 25 UUB25J1 thermistor sensor used Note that if MORE is selected then the temperature used for compensation and displayed will be that selected at
25. an be set to a value which will give required analog output if an overrange e g open circuit occurs 5 43 Second analog output mode Display ECZ Range cand FES PPA Pent or C Default Value cand Analog output mode seen only when the dual analog output option is fitted The second analog output may be set to operate from either the conductivity resistivity ppm sodium chloride 32 of 44 RM4COMAN 2 3 0 by weight temperature values Note only the mode selected at the SEt GPEF function or the temperature can be selected Select cand for conductivity FES for resistivity PPA for PPA or Pent for sodium chloride or PE for temperature Set the FEE and FEET functions to suit the output mode selected Note if set for conductivity resistivity or ppm then the output will go to full scale if the display goes to overrange ar displayed on the 7 segment display If set for temperature an overrange display will cause the output to revert to that for the default temperature set at the dEF PE 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 5 44 Analog output logarithmic or linear mode Display FEE Range Li nto fLod2 La LoS orioadS Default Value bt a Analog output linear or logarithmic mode seen only when the analog output option is fitted and not applicable unless FEC etr tt is set to GFF Choose L a for a linear output
26. as 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 e CC GAIAM 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 e MORECS No access to functions This message indicates that the attempt to enter FURT mode has failed due to entry being blocked by the REES function being set to RORE The only way to gain access to functions in this case is via AL mode e CAL EFF Calibration point 1 error The conductivity or resistivity input is too high check for correct cell constant selection check cell for short circuit e CAL SPRA EFF Calibration point 1 span error The EAL conductivity resistivity must be at least 5 away of the range of the cell from the null value Try calibration again with a higher conductivity or lower resistivity solution ensure than null calibration was correctly carried out e CAL 9A R 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 e CALZ EFF Calibration point 2 error See CAL EFF o CALZ SPAR EFT Calibration point 2 span error The second calibration point must be at least 5 times greater than the EAL point and at least
27. be set at the Eh Gt and Ehe SOL functions This instrument allows for either manual or automatic temperature compensation If no tempera ture sensor is used with the cell then the known temperature of the solution can be entered at the dEF F function If a temperature sensor is used the the reading obtained from this sensor can be used to automatically compensate for temperature changes in the solution For process solu tions whose temperature varies by more than a few degrees automatic temperature compensation is essential for accurate readings For example water varies its conductivity at the rate of 2 C RM4COMAN 2 3 0 5 of 44 1 3 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 electrode 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 TBPS cells are suitable for installation into non metallic pipework Ideally the cell should be in stalled from the side of the fitting This method is less likely to be subjected to trapped air The T fitting should be modified to allow the face K 1 0 K 0 1 of the cell to be flush with the inside of the fitting or pipe wall It is acceptable for the cell to be slightly reces
28. c output Choices available are 6 86 1 0 0 6 3 LD or D D display units These are particularly written for optimum use with display units of uS cm but they can be used with other conductivity ranges and within the limits of the ranges available in the resistivity ppm and percent NaCl ranges Example If a9 is selected at the FEC function the analog output will be spread over 3 decades of measurement If B fis chosen as the low starting point at the FEE tea function then the first decade of measurement will be from G fto the second from 48 to 15 0 and the third from 15 50 to 105 50 For a 4 20mA output the output for each decade would be as shown in the table below Display range mA output range 0 1 to 1 0 4 0 to 9 3 1 0 to 10 0 9 3 to 14 6 10 0 to 100 0 14 6 to 20 0 5 46 Second analog output logarithmic or linear mode Display FEE Range Lin Lo i LoS Lo LoSY4 or Lao95 Default Value L a Second analog output linear or logarithmic mode seen only when the dual analog output option is fitted and not applicable unless FEE etr t is set to GFF See FEE for a description 5 47 Second analog output logarithmic start point Display FETAL Range 6 08 D D 1 0 1 Gor ta Default Value amp 3G Second analog retransmission logarithmic output low starting point Seen only when the dual analog retransmission option is fitted and not applicable unless FEC cert is set to GFF See FEC La for a descripti
29. calibration using high resitivity solutions is required the instrument 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 The conversion formula is 1 x K factor Conductivity cm f Resistivity e g for 0 006 uS cm conductivity and a K 0 1 cell Resistivity x 0 1 16 67 MOhms 1 0 006 76 If possible cover top of beaker to reduce air contact Flow to waste Product solution 6 6 Temperature Calibration Null Note the temperature sensor type should be selected using the PE amp YPE function and appropri ate internal links set prior to calibration The temperature null calibration function PE RULL 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 PE amp YPE function and that appropriate hardware links have been set for the probe type see the Hardware Configuration chapter Enter the calibration CRAL mode and step through the functions until PE RULL is reached Place a shorting wire across the temperature input terminals terminals 7 8 and
30. cess facility is used then the only way to view or alter any other function settings is to power up via EAL mode ie there is no entry to FURIE mode functions unless the instrument is powered up in EAL mode 18 of 44 RM4COMAN 2 3 0 Explanation of Functions 5 1 Alarm relay low setpoint Display Arla Range Any display value or GFF Default Value GFF Displays and sets the low setpoint value for the designated alarm relay x Note x will be replaced by the relay number when displayed e g A ito for relay 1 Use this low setpoint function if a relay operation is required when the display value becomes equal to or less than the low setpoint value To set a low alarm value go to the Arte function and use the or M push buttons to set the value required then press J to accept this value The low alarm setpoint may be disabled by pressing the and M push buttons simultaneously When the alarm is disabled the display will indicate GFF If the relay is allocated both a low and high setpoint then the relay will activate when the value displayed moves outside the band set by the low and high setpoints The value at which the relay will reset is controlled by the AaH function Example IfA tho is set to iD then relay 1 will activate when the display value is 10 or less Display Value Relay resets Relay above this activates value Axta at this value plus or below ATHIRA RTEA Sea SSeS ee Se See Se Sa es AxHY4 value Alarm l
31. econds The reset time is common for both alarm high and low setpoint values With the alarm condition is removed the alarm relay will stay in its alarm condition for the time selected as the reset time If the input moves back into alarm condition during this period the timer will reset and the full time delay will be restored The reset time is selectable over G to F494 seconds To set a reset time value go to the Arr amp function and use the B or push buttons to set the value required then press GJ to accept this value Example If A irt is set to 2 seconds then the resetting of alarm relay 1 will be delayed by 10 seconds 5 6 Alarm relay normally open closed Display Rin a or Rane Range Rin oa or Rane Default Value Farn a Displays and sets the setpoint alarm relay x action to normally open de energised or normally closed energised when no alarm condition is present Since the relay will always open when power is removed a normally closed alarm is often used to provide a power failure alarm indication To set the alarm relay for normally open or closed go to the Ran e or ARrn e function and use the Q or S push buttons to set the required operation then press GJ to accept this selection Example If set to A tn a alarm relay 1 will be open circuit when the display is outside alarm condition and will be closed short circuit across terminals when the display is in alarm condition RM4COMAN 2 3 0 21 of 44 5 7 Display brightness
32. een you can release the button No special power up procedure is required to enter FUNE mode 2 When the wake up 1 When the wake up messages have finished and the display has settled down to its normal reading press then release the B button messages have finished and the display has settled down to its normal reading press then release the B button 2 Within 2 seconds of releasing the J button press then release the and amp buttons together The display will now indicate FUE followed by the first function 3 Within 2 seconds of releasing the G button press then release the B and 3 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 RM4COMAN 2 3 0 17 of 44 Example Entering FUNE mode to change alarm 1 high function A tH from GFF to 8G Press amp release fd Press amp release Press amp release gt Func gt A iHi P _OFF gt imr Press amp release Press amp release um eoten lesan gt Funt gt End Example Entering CAL mode to change decimal point function dE Pt from amp to D D Switch off Press amp hold Switch on f ro sean ba instrument gt Hold B untij gt E AL Release B Press amp release I rw
33. ell wiring colour codes AIC cells SDI cells Cell in Blue Black Cell out Yellow or White White Temperature Red Red Temperature Green or Black Green Shield n a Clear TOO OO vunction head TIN Jour Connector layout TEMP CELL for TBTH cell Temperature TBTH Cell Red plus Black or Green TBLR Cell Cell Blue plus Outer Electrodes or Cell Out yellow or white wire te a Centre Electrodes or Cell In blue wire 10 of 44 Yellow or White TBPS Cells Z Cells In and Out blue amp yellow or white wires may be connected either way around with TBPS types RM4COMAN 2 3 0 Conductivity cell wiring Ensure correct K factor is set at the PF bE CASE function RM4 TERMINALS ee CELL OUT CELL IN Temperature sensor wiring 2 or 3 wire RTD Pt100 or Pt1000 sensors 100Q thermistor or UU25J1 thermistor types can be accepted Wiring for these sensors is shown below Ensure that links for the temperature probe are set and that the 9 amp amp YPE function is set to the appropriate type RM4 TERMINALS RM4 TERMINALS 7 8 9 7 8 9 Link 7 amp 9 Link 7 amp 9 2209 H UUB25J1 RTD or 100 OhmQ thermistor RM4 TERMINALS 7 8 9 r RTD RM4 TERMINALS 8 9
34. if the SE amp d SP function is set to PPA This function should only be used when calibration problems exist and it is necessary to clear the calibration memory See section 6 8 for details 5 33 Percentage uncalibration Display UCAL Pent Range n a Default Value n a This function is used to set the resistivity calibration back to the factory calibration values and will be seen only if the SE amp d SP function is set to Pent This function should only be used when calibration problems exist and it is necessary to clear the calibration memory See section 6 8 for details 5 34 Temperature uncalibration Display UCAL OF Range n a Default Value n a This function is used to set the temperature 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 See section 6 9 for details 5 35 ppm conversion factor Display PPA FACE Range 6 233 to 2 005 Default Value 5 5565 This function is used to display and sets the ppm conversion factor and will be seen only if the SEt d GP function is set to PPA See section 6 11 for details RM4COMAN 2 3 0 29 of 44 5 36 Set display type Display SEt di SP Range cand ESE PPA or Pent Default Value cand This function is used to set the default display to either conductivity c and in the display units selected or resistivity FES amp in MQ or parts per million PPA
35. ill function on the selected mode even if the display is not in that mode e g if A fis 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 Special blowdown dosing operation dGSE this mode is for use only in special instruments fitted with 2 or more output relays The purpose of RM4COMAN 2 3 0 31 of 44 the blowdown software is to provide an output to a dosing pump for a programmable time period This timed dosing pump output occurs immediately after the high level conductivity alarm resets This software operates in the following manner e Two relays are fitted relay 1 is a timed dosing operation relay relay 2 is used as a high conductivity alarm which is used to operate the blowdown valve e When the conductivity level becomes equal to or higher than the alarm 2 setpoint set at the AZH function relay 2 will activate opening the blowdown valve e When the conductivity level falls to below the alarm 2 setpoint minus the hysteresis value set at R HY relay 2 will deactivate closing the blowdown valve Relay 1 will now activate for a period of time set at the dGSE PEF ad function At the end of the time period relay 1 will de activate If during the dosing period the conductivity should rise above the relay 2 setpoint then relay 2 will activate and relay 1 will immediately deactivate cutting sho
36. int value for Any display GFF See 5 22 19 designated alarm relay x value or GFF 4 1 AcHY Hysteresis value for the Gto 9999 ig See 5 3 20 designated alarm relay zx 4 1 Artt Trip time delay for the G to 9999 H See 5 4 21 designated alarm relay zx 4 1 Arre Reset time delay for the D to 9999 H See 5 5 21 designated alarm relay zx 4 1 Rrn a Alarm relay x action to Rirn a or RArn a See 5 07 21 or normally open de energised or Rrn e 4 1 Rrn e normally closed energised br Gt Display brightness level ito amp is bal f 22 duit Automatic brightness switching Gto iS i 5 8 22 d aFF Auto display dimming timer D to 9999 HH 5 9 22 SECS FEE Analog output option low Any display 5 5 10 23 display value Optional value FECT Analog output option high Any display 1000 5 117 23 display value Optional value FEC Second analog output option Any display 5 5 12 23 Che low display value Optional value rec Second analog output option Any display i000 5 1323 Che high display value Optional value Optional this function will only be accessible if the relevant option is fitted RM4COMAN 2 3 0 13 of 44 Functions in this second table are available only in EARL mode or if REES is set to ALL Display Function Range Default Your Ref Page record drnd Display rounding to SGG amp G i 5 14 24 CPE Decimal point D D i etc D 5 15 24 Fler Digital filter U t
37. isplay type cond FESt cand 5 36 30 d SP PPA or Pent r c Analog output PI control an or DFF GFF 5 37 30 cer Optional Phut button function for NONE WH ta NONE 5 38 7 30 instruments with front or H La button RECS Access mode GFF ERSY GFF 5 39 31 NONE or ALL SPRE Setpoint access mode RAGA i 2 etc Ri 5 40 31 Optional Ai Ae Alarm relay operation mode cond FESt cand See 5 41 731 etc PPA Pent 4 1 Sf or dGSE FEE Analog output mode cond E5St cand 5 42 32 Optional PPA Pent or oE FEC Second analog output mode cand FESE cand 5437 32 Optional PPA Pent or or rec Analog output logarithmic or Lintogi Lin 5 44 33 linear mode Optional LoSe to393 LoS or Lo39S FEE Analog output logarithmic start G G G 0 DDD 5 45 34 L point Optional D iG or 10 5 rete Second analog output Lin Lo3 i Lin 5 46 34 logarithmic or linear mode Log Lagi Optional LoS or Lo395S FEE Second analog output D D0 0 5D 1 DDD FAT 34 Lo logarithmic start point D i iD or Optional 15 5 bRU Baud rate for serial 63 680 9600 5 48 34 FREE communications Optional i238 24a 800 9600 9 2 or 38 4 Optional this function will only be accessible if the relevant option is fitted RM4COMAN 2 3 0 15 of 44 Pet Parity for serial communications RONE EUER MONE 5 49 35 Optional or add G Put Output for serial d SP Cont Ca
38. isplays and sets the display rounding value This value may be set to 1 5000 displayed units Display rounding is useful for reducing the instrument resolution without loss of accuracy in ap plications where it is undesirable to display to a fine tolerance To set the display rounding value go to the dend function and use the or amp push buttons to set the required value then press 8 to accept this selection Example If set to the display values will change in multiples of 10 only i e display moves from i to 2G to 36 etc 5 15 Decimal point Display dOPE Range D D etc Default Value amp Displays and sets the decimal point By pressing the amp or amp pushbutton at the d amp Pt function the decimal point position may be set The display will indicate as follows B no decimal point G 1 decimal place G G2 2 decimal places amp G23 3 decimal places and 8 8884 for display with more than 4 digits Note if the decimal point is altered the display will need to be recalibrated and alarm etc settings checked 5 16 Digital filter Display Fler Range Gto8 Default Value 2 Displays and sets the digital filter value Digital filtering uses a weighted average method of determining the display value and is used for reducing display value variation due to short term interference The digital filter range is selectable from to B where B none and B most filtering Use or M at the FLEr function to
39. iven In any event the manufacturer has no other obligation or liability beyond replacement or repair of this product Modifications may be made to any 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 44 of 44 RM4COMAN 2 3 0
40. more than 1 relay fitted Sets the access via FURIE mode and easy alarm access mode to the alarm relay setpoints The following choices are available A i Allows setpoint access to alarm 1 only A i Allows setpoint access to alarms 1 and 2 only A 1 3 Allows setpoint access to alarms 1 2 and 3 etc up to the maximum number of relays fitted Note Only the setpoints which have been given a value will be accessible e g if A tH is set to GFF then there will be no access to the A iH function when SPARE is used 5 41 Alarm relay operation mode Display A LAZ etc Range cond ESk PPA Pent PE or DOSE Default Value cand Alarm relay operation mode for relays 1 2 etc The alarms setpoints may be set to operate from either the conductivity resistivity ppm sodium chloride by weight temperature values Note apart from the special dGSE operation only the mode selected at the SE amp GPEF function or the temperature can be selected Select c and for conductivity FE St for resistivity PPA for PPA or Pent for sodium chloride or PE for temperature A special blowdown d amp S dosing pump operation mode is also available and is described below The display can toggle from displaying temperature a PE indication will flash every 8 seconds when set to temperature to displaying conductivity or resistivity or PPA depending on which is selected at the SE amp d SP function by pressing the or M pushbutton The alarm will st
41. mperature sensor type Pt100 Pt1000 LM335 UUB25J1 or 100 Ohm thermistor 12345678 9 l 2 3 4 Switched 24V output Analog output single or dual Serial communications 5 digit LED display Relay annunciator LED s Pushbutton keypad Two setpoint lt _ Power supply relays standard Calibration setpoint and other set up functions are easily achieved using the push buttons Two standard inbuilt relays are provided for alarm control additional relays retransmission and DC output voltage may also be provided A special blowdown relay operation is available for units fitted with 2 relays Unless otherwise specified at the time of order your RM4 has been factory set to a standard configuration Like all other RM4 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 out put is provided by the RM4 thereby eliminating grounding and common voltage problems This isolation feature makes the RM4 ideal for interfacing to computers PLCs and other data acqui sition devices The single analog output option allows the choice of temperature or main display conductivity or resistivity NaCl or PPM output The dual analog option allows both temper ature and main display
42. nd will reset when the display value goes above 38 8 i e at 3G or above The hysteresis units are expressed in displayed engineering units Example If A iH is set to IDD and A EHY is set to iD then relay 1 will activate when the display value is G or higher and will reset at a display value of 89 or lower 20 of 44 RM4COMAN 2 3 0 5 4 Alarm relay trip time Display Arte Range D to 9999 Default Value amp Displays and sets the alarm trip time in seconds The trip time is common for both alarm high and low setpoint values The trip time provides a time delay before the alarm relay will activate when an alarm condition is present The alarm condition must be present continuously for the whole trip time period before the alarm will activate If the input moves out of alarm condition during this period the timer will reset and the full time delay will be restored This trip time delay is useful for preventing an alarm trip due to short non critical deviations from setpoint The trip time is selectable over GB to 9999 seconds To set a trip time value go to the Aztl function and use the B or M push buttons to set the value required then press I to accept this value Example If A tt is set to 5 seconds then the display must indicate an alarm value for a full 5 seconds before relay 1 will activate 5 5 Alarm relay reset time Display Arre Range D to 9999 Default Value amp Displays and sets the alarm reset delay time in s
43. nt 5 00 35 communications Optional DLL Abus or A boS Addr Instrument address for serial Gto zi 5 5 517 ao communications Optional Optional this function will only be accessible if the relevant option is fitted 4 1 Relay table Record your relay settings in the table below Display Relay 1 Relay 2 Relay 3 Relay 4 Arlo ArH ArH Arte Arre Arn a or Rane A i ARZ etc 16 of 44 RM4COMAN 2 3 0 5 Explanation of functions The RM4 setup and calibration functions are configured through a push button sequence The push buttons located at the front of the instrument are used to alter settings Two basic access modes are available UAE mode simple push button sequence allows access to commonly set up functions such as alarm setpoints CAL mode power up sequence plus push button sequence allows access to all functions including calibration parameters Once EAL or FURL mode has been entered you can step through the functions by pressing and releasing the push button until the required function is reached Changes to functions are made by pressing the or push button in some cases both simultaneously when the required function is reached See the flow chart example on the following page Entering CA Mode Entering Furi Mode Pe 1 Remove power from the instrument Hold in the button and reapply power The display will indicate CAL as part of the wake up messages when the EAL message is s
44. o be nulled dry the cell and place in air 3 Enter the CAL mode and FURE mode then step through the functions until TRL RULL is displayed 4 Press and bd together the display will show a reading this reading will be taken as zero upon completion Allow 20 seconds for the reading to stabilise 5 Press G the display will show MULL End When the instrument returns to normal measure mode the reading from the probe in air will be zero If any other message is seen refer to section 6 13 6 4 Conductivity Resistivity ppm Calibration After performing the null calibration as previously described place the required probe in a solution of known conductivity resistivity for resistivity calibration ensure that the calibration solution resistivity is not above 1MQ or ppm Follow the procedure below 36 of 44 RM4COMAN 2 3 0 1 Enter the CAL mode as previously described and step through the instructions until TRL appears 2 Press and M together the display will show a value with CAL 1 flashing every few seconds Allow time for this reading to stabilise typically 20 seconds 3 Press and release I the display will show a value with SEL 1 flashing every few seconds 4 Adjust the value displayed to the known solution value using the ZY and amp pushbuttons 5 Press and release the display will show EAL End followed by CAL 2 If any other message is seen see Error Messages appendix then the calibration will need to be
45. oB 2 5 16 24 GSE Special dosing mode operation Sto 686 5 5 17 25 PEF d iad Temperature sensor type NONE og AGKHE 518 25 EYPE i966 2 335 t 63 or 2Su i dEF Default temperature value D O to 268 6 25 8 5 19 7 25 or OL Solution temperature 56 00 to 2 00 5 20 26 SLPE compensation slope 6 35 Gi Solution temperature B S to 66 6 25 5 ol f 26 SE compensation reference Prbe Cell K factor 6 6 1 6 85 D 5 22 26 CASe 6 1 3 5 28 2 6 5 3 ia SG or 6a HOFF Hydrogen ion compensation H GFF or HOFF 5 25 27 or 4 071 on CAL Display null calibration n a n a 5 24 27 RULL CAL i First live input calibration Any display n a 9 25 27 scaling point value CALZ Second live input calibration Any display n a 5 26 27 scaling point value PE Temperature null calibration n a n a 5 27 27 RULL CAL Temperature calibration n a n a 5 28 28 or cond Conductivity measuring units uw5 cA uS A uS cA 5 29 28 ure E AS CA or ASA UCAL Conductivity uncalibration n a n a 5 30 28 cand UCAL Resistivity uncalibration n a n a 5 31 28 FESE UCAL ppm uncalibration n a n a 5 32 29 PPA Optional this function will only be accessible if the relevant option is fitted 14 of 44 RM4COMAN 2 3 0 UCAL Percentage uncalibration n a n a 5 33 29 Pent UCAL Temperature uncalibration n a n a 5 34 29 or PPA ppm conversion factor 5 288 to 6 563 5 35 29 FREE RHH SEt Set d
46. on 5 48 Baud rate for optional serial communications Display bAUd FREE Range 300 600 200 2400 4808 95600 19 2 or 38 4 Default Value S6050 Set baud rate seen only with serial output option Refer to the separate RM4 Din Rail Meter 34 of 44 RM4COMAN 2 3 0 Optional Output Addendum booklet supplied when optional outputs are fitted Select from 388 GG i200 2440S HBDD 95600 19 2 or 38 4 baud The baud rate should be set to match the device being communicated with 5 49 Parity for optional serial communications Display Prey Range MONE EVEN or add Default Value MODNE Set parity seen only with serial output option Refer to the separate RM4 Din Rail Meter Optional Output Addendum booklet supplied when optional outputs are fitted Select parity check to either AGRE EUER or add The parity should be set to match the device being communicated with 5 50 Output mode for optional serial communications Display G P ust Range d SP Cont POLL A buS or AbuS Default Value Cant Set serial interface mode seen only with serial output option Refer to the separate RM4 Din Rail Meter Optional Output Addendum booklet supplied when optional outputs are fitted Allows user to select the serial interface operation as follows d SP sends image data from the display without conversion to ASCII Cont sends 8 bit ASCII form of display data at a rate typically 90 of the sample rate POLL controlled b
47. or Sodium Chloride NaCl percentage by weight Pent Select the default display required for measurement 5 37 Analog output PI control Display rEc ctr Range on or GFF Default Value GFF Analog output mode seen only when analog output option is fitted This function allows selection of an or GFF for PI control analog output If set to GFF the analog output operates as a retransmission output and uses the functions described in this chapter If set to an the analog output operates as a PI control output When this function is set to an the following associated functions will appear SE amp 5PR CPS C Pa C339 CFL CF L L and FEE SPRE These functions are not detailed in this manual Refer to the separate RM4 Din Rail Meter Optional Output Addendum booklet for description of the analog PI control functions and wiring details 5 38 Q button function Display Pout Range WORE HW Laor Loa Default Value NDN 2 button function The button may be set to operate one of the following selections e NONE has no operation e H Peak memory This function allows the GJ to be used to view and reset the peak memory The peak memory is the maximum positive display value conductivity resistivity or ppm achieved since the peak memory was last reset To view the peak memory press the momentarily the display will show the indicator PH followed by the peak reading This peak reading will be retained on the display for
48. ore 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 The KAL together with the TAL MULL function sets the calibration slope the CALZ reading is used to compensate for head resistance when long cable lengths are used When using a temperature probe temperature calibration is carried out with the POE Ruti and CAL PE functions ensure that the correct temperature probe type has been selected see PE t YPE and that the appropriate links have been set see Chapter 3 6 2 Calibration Functions To enter the calibration mode the instrument must be powered up and functions entered via CAL mode as illustrated in chapter 5 page 19 6 3 Conductivity Resistivity ppm Calibration Null Null calibration allows the 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 temperature 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 5Gi SL PE function is correctly set If no temperature sensor is being used check that the SG PE function is set to the required default temperature 2 Using pure water clean the cell t
49. ow operation with hysteresis Time 5 2 Alarm relay high setpoint Display Rick Range Any display value or GFF Default Value GFF Displays and sets the high setpoint value for the designated alarm relay x Note x will be replaced by the relay number when displayed e g A iH for relay 1 Use this high setpoint function if a relay operation is required when the display value becomes equal to or more than the low setpoint value To set a high alarm value go to the ArH function and use the or amp push buttons to set the value required then press J to accept this value The high alarm setpoint may be disabled by pressing the and amp push buttons simultaneously When the alarm is disabled the display will indicate GFF If the relay is allocated both a low and high setpoint then the relay will activate when the value displayed moves outside the band set by the low and high setpoints The value at which the relay will reset is controlled by the ArH function RM4COMAN 2 3 0 19 of 44 Example IfA iH is set to 238 then relay 1 will activate when the display value is 38 or higher Display Value Rok xx p Fick SS SS Se SS SS SS SS ee a ee Relay minus ArHY activates at this value Relay or above resets below this value Alarm high operation with hysteresis Time 5 3 Alarm relay hysteresis deadband Display ArH Range D to 9999 Default Value 3 Displays and
50. re has been completed 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 power to the instrument wait a few seconds and then restore power 40 of 44 RM4COMAN 2 3 0 6 12 Resistance checks on the conductivity cell Temperature Conductivity Conductivity electrode resistance checks Across cell wires open circuit for clean dry cell in air Electrode to corresponding cell wire low resistance fraction of an Ohm Temperature sensor checks Pt100 sensor approx 110 approx at 25 C 100Q at zero degrees LM335 sensor 35kQ 1MQ approx depending on polarity On diode test range 0 6V 1 6V approx depending on polarity 6 13 Error messages e NULL EFF Null error Reading too high when trying to null Possible causes are wet or dirty cell or faulty cable e 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 e SC DFSk EFF Temperature offset error The offset required to null the temperature probe was too great Check probe connections and link settings e on temperature reading This indicates either a faulty temperature sensor or that a temperature sensor type has been selected at the PE amp YPE function and none is fitted e OC SPAR Err Temperature calibration span error The temperature for calibration w
51. rt the dosing time The process will then start again with relay 1 being energised for the period of time set at the GSE PEF d function when relay 2 resets Two functions are used with this special mode The special functions are A this should be set to GSE for blowdown operation Note the usual relay 1 functions such as A iLa ATH etc will not be seen if A fis set to dOSE GSE PEF d sets the relay 1 timer period in minutes and can be set from 0 to 600 minutes The AdOSE PEF d function will only be seen when A is set to dO SE 5 42 Analog output mode Display FEE Range cand FES PPA Pent or C Default Value cand Analog output mode seen only when the analog output option is fitted The analog output may be set to operate from either the conductivity resistivity ppm sodium chloride by weight temperature values Note only the mode selected at the SE amp GPEF function or the temperature can be selected Select c and for conductivity FE St for resistivity PPA for PPA or Pent for sodium chloride or PE for temperature Set the FEE and FEET functions to suit the output mode selected Note if set for conductivity resistivity or ppm then the output will go to full scale if the display goes to overrange ar displayed on the 7 segment display If set for temperature an overrange display will cause the output to revert to that for the default temperature set at the dEF PC function i e if required the default temperature c
52. sed when the cell is installed from the side of the fitting Alternatively a 3 4 BSP hole may be drilled threaded into the side of a fitting such as an existing elbow or T fitting It is acceptable to install the cell from the top or bottom of the pipe or fitting provided care is taken to prevent air pockets or build up of sed iment In applications where the pipe diameter _ is less than 50mm the reduced sample volume around the cell electrodes may affect the accu racy of the reading In these applications in line calibration correction is recommended For in Modified T fitting Modified T fitting f for in line flow elbow installation stallation into the side wall of a tank vessel etc ifiorizontal or verticali ih arizantal or vertica the information above applies Ideal Installation Acceptable Acceptable NOT acceptable Acceptable Acceptable method slightly recessed caution avoid for horizontal for clean water but not ideal air pocket installation with no sediment ra clean water with no sediment 6 of 44 RM4COMAN 2 3 0 TBLR TBTH and TBTHHT cells are suit able for installation into metallic and non metal lic pipework The cell measurement is made on the inside of the cell body ensuring it is virtually unaffected by the surrounding sample or vol ume The cell may be mounted in a horizontal or vertical position and is usually installed into a modified T fitting
53. simultaneously the display will show HEAL End indicating that the calibration is cleared If any other message is seen refer to section 6 13 6 9 Temperature Uncalibration This function sets the instrument calibration back to that of an ideal temperature sensor Uncal ibrate 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 but ton until the display shows UEAL PL Press the Z and S pushbuttons simultaneously the display will show HEAL End indicating that the calibration is cleared If any other message is seen refer to section 6 13 6 10 Equivalent resistance values Equivalent resistance values The following table shows equivalent resistances for various conduc tivity 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 instrument operation The value of resistance can be calculated from 1 Conductivity cm x K factor resistivity Some examples are shown in the table below RM4COMAN 2 3 0 39 of 44 Cell K Factor mS cm uS cm uS m Substitute resistance K 10 0 100 100 000 10 0
54. the conversion factor must be manually entered Cell K factor The instrument can only supply a given current range through the solution being measured therefore a cell designed for use with pure water will not be suitable for use in measuring very high conductivity since the instrument will not be capable of providing sufficient current for stable measurement at both extremes This instrument requires that the resistance of the solution be 809 or higher for accurate measurement To overcome this problem cells with different sensitivity levels are manufactured and this sensitivity level is known as the K factor A cell with a higher K factor will use less current in a given solution than a cell with a lower K factor See the table at the beginning of this chapter for typical measuring ranges for common K factor cells The correct K factor cell should be chosen to suit the range required for measurement Temperature compensation Since conductivity changes with temperature the conductivity value displayed is referenced to a given temperature usually 25 C This means that the value being seen on the display is not necessarily the actual conductivity of the solution at that time but is the conductivity value which would be seen if the solution temperature was 25 C If 25 C is not the required reference temperature i e if it is required to view what the conductivity reading would be at a different temperature then the required temperature value can
55. the dEF PE function 5 19 Default temperature value Display dEF OF Range 6 8 to 268 8 Default Value 25 8 Displays and sets the default temperature for manual compensation when P amp E YPE is set to RORE If no temperature sensor is used set this function to the temperature required for temperature compensation calculation i e set this to the known temperature of the process solution RM4COMAN 2 3 0 25 of 44 5 20 Solution temperature compensation slope Display Gi SLPE Range 56 500 to 3 86 Default Value 2 050 Displays and sets the solution slope variable from 6 00 to 0 00 The solution slope gives the temperature coefficient of the solution measured as a per C this figure is needed since each individual solutions conductivity resistivity will vary differently with temperature A typical value is 2 per C for water 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 B D 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 in the 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 1 ductivit istivity at T1 ra Conductivi
56. ty or Resistivity a x 100 SI a onductivity or Resistivity at T2 5 Enter the result as the solution slope 5 21 Solution temperature compensation reference Display Sai PE Range D D to 105 50 Default Value 25 0 Displays and sets the solution temperature T1 to be used with the solution slope function above for automatic temperature compensation calculation The default value is set at 25 C as this is the standard reference temperature for conductivity measurement If this value is changed the conductivity readings obtained will be the value compensated to the new temperature selected e g if changed to 30 C the display will compensate to show conductivity at 30 C no matter what the solution temperature actually is 5 22 Cell K factor Display PrbeE CHS Range 6 8 4 385 2 16 2 5 43 234 5 8 13 58 or aa Default Value D Displays and sets the probe cell constant K number See chapter 1 for measurement ranges for common K factors Set this function to match the K factor of the cell being used 26 of 44 RM4COMAN 2 3 0 5 23 Hydrogen ion compensation Display H GFF or HGR Range H GFF or HDR Default Value H GFF Displays and sets the hydrogen ion compensation feature to either be on or off When measuring high purity water solutions 1luS cm or less compensation needs to be made for hydrogen ions as well as temperature When set to H G771 the instrument compensates for conductivity due to the H and OH
57. utput binary or BCD up to 16 bit NPN or PNP output types available Optional outputs are available in certain combinations e g Extra relay plus RS232 1 2 Conductivity measurement general information The instrument measures conductivity by placing an AC voltage across the two conductive surfaces electrodes of the conductivity cell and measuring the resulting AC current passing through the solution For a given cell the AC current will increase as the conductivity of the solution increases Any external voltage s present in the solution where the cell is located may cause inaccuracy and possibly instability in the reading Typical sources of external voltages are level sensors and badly earthed electrical equipment such as pumps which have contact with the solution The amount of AC current produced by the cell depends on the conductivity of the solution the area of the cell electrodes and the distance between the electrodes Any deposits which coat the cell will reduce the surface area available and therefore cause inaccurate readings If cells are likely to become coated in use they will either have to be regularly cleaned or a non contact inductive type cell used The use of non contact cells is not covered in this manual If resistivity ppm or percent are selected for viewing then the instrument simply measures con ductivity using a conventional conductivity cell and converts this reading into the required display units For ppm readings
58. y computer or PLC as host Host sends command via RS232 485 and instrument responds as requested Fi bu5 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 5 51 Instrument address for optional serial communications Display Addr Range Gtowi Default Value amp Set unit address for polled PGLL or A tbu5 mode G to 2 4 seen only with serial output option Refer to the separate RM4 Din Rail Meter Optional Output Addendum booklet supplied when optional outputs are fitted Allows several units to operate on the same RS485 interface reporting on different areas etc if RS485 is available 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 DEC or 2A HEX is address 10 Do not use address 0 in A bu5S mode RM4COMAN 2 3 0 35 of 44 6 Calibration 6 1 Introduction The instrument has provision for calibration slope and head resistance compensation conductiv ity resistivity ppm calibration A null calibration feature see CAL RULL allows the probe to be referenced to the instrument at a zero conductivity level A null calibration should be undertaken bef
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