PM4-RT8 - Amalgamated Instrument Co Pty Ltd
Contents
1. Function Range Description ran NONE SP Re setpoint access only This blocks access to any functions except the continued P Hid alarm setpoint functions unless the remote input pins are short circuited or d Hid entry is made via CAL mode H Fia Aie no access This blocks access to all functions unless the remote input Lo pins are short circuited or entry is made via CAL mode H Lo duit display brightness control The remote input can be used to change i the display brightness When this mode is selected the display brightness can ER ES be switched via the remote input between the brightness level set at the ES be SE function and the brightness level set at the duit function cis Rc r acknowledge or reset alarm used when Ax LE ch is set to n i e Ac when using latching alarm relays The remote input can be used to cor ope acknowledge an alarm condition or reset the alarm If the remote input is activated when there is still an alarm condition then the alarm will be acknowledged and the relay will automatically reset when the input moves out of alarm condition If the remote input is activated when the input has been in an alarm condition but is no longer in alarm condition then the relay will immediately reset See Ax LE eh function for further description of latching operation SPFR SCAN Remote or 2 button function mode of operation This function sets the cha Hi SH operation mode for2. Page 17 of 27 PM4RT8MAN 1 4 0 Function Range Description ran NONE P Ht d peak hold continued continued P Hid dHid SPER F3 RP set to P Hid H Chri Lo ci Fi Operates on the difference between channel 1 the remaining H Lo channels e g when set to di F iif 7 3 MP is set to P Hid peak SP Ac hold then when the remote input is activated the inputs will be Rac scanned and the largest difference between channel 1 and the CALS remaining channels will be displayed from then on the display duit will show the maximum difference until the remote input is or released The letter e will be displayed if the d SP wn E Acter function is set to show a channel number Note that in this mode the value displayed will be negative if channel 1 is the lowest value chi Operates on channel 1 only e g when set to ch if F RP is set to P Ht d peak hold then when the remote input is activated the display will show the peak value for channel 1 The channel number will be displayed if the d SP wr E function is set to show a channel number cheto Operates on the selected channel see eh above chB d Htid display hold The display value will be held whilst the remote input pins are short circuited SPF F3 RP set to d Hid See P Hid for further description Chr SERA Holds whichever channel is currently displayed
3. 6 Function Table Initial displa Meaning of Nest disola Default Record Your play display play Setting Settings Axio Alarm low setpoint value Setpoint value or GFF GFF See acti ng AXK Alarm high setpoint value Setpoint value or GFF See a ng Hysteresis value See following AMA Armi hysteresis in measured units table RAxkk Alarm trip time No of seconds before relay trips ee eee ng Axre Alarm reset time Reset time in seconds 299 N ng Axn a or Axn e Alarm action N O or N C Axn a or Axn c See ee Rx SP orAx t Setpoint or trailing alarm AX SP or Axn E See e Rx Lech Alarm latching operation on or GFF See oe bre SE Display brightness ito iS Remote display quer brightness switching 91045 bAr Bargraph low reading Value in memory 3 bAr Bargraph high reading Value in memory 055 Functions below are accessible only via CA mode or if REES function is set to ALL bAr EMPE Bargraph operation mode bAr S dot d dot or bAr bAr d3oP Digital output mode bcd b 5 t bs nor bo nd Digital retransmission d3 0P output polarity Riaor AH ES ERRE BCD retransmission start Value in memory value Scaled digital output d 9 low reading Value in memory Scaled digital output high tg reading Value in memory EC Analog retransmission 1 Value in memory output low limit Analog retransmission 1 r Et output high limit Value in memory Analog retransmission 2 r EC Che a init
4. The PM4 RT8 has an easy alarm access facility which allows access to the alarm setpoints simply by pressing the 4 button at the front or rear of the instrument The first setpoint will then appear and changes to this setpoint may be made to this setpoint via the BY or MW buttons Press the A button to accept any changes orto move on tothe next setpoint Note this easy access also functions in the same manner for the PI control setpoint relay and or analog Pl output For further details of analog Pl easy setpoint access refer to the separate PM4 Panel Meter Optional Output Addendum booklet supplied when this option is fitted The instrument must be set in the manner described below to allow the easy access facility to work 1 The F FP function must be set to SP AE or the REES function must be set to ERSY 2 Atleast one alarm must have a setpoint nothing will happen if allthe alarm setpoints are set to GFF 3 The SP AE function must be set to allow access to the relays required e g if set to A e 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 CAL mode then the easy access will not function If in doubt then remove power from the instrument wait for a few seconds then apply power again 5 If the easy access facility is used then the only way to view or alter any other function settings
5. H 3H Hold whichever channel is the highest Lo Holds whichever channel is the lowest RUSE Holds the average of all channels di FF Holds the maximum difference between any channels F Holds the maximum difference from channel 1 chi Channel 1 value held che to Selected channel number held chB Page 18 of 27 PM4RT8MAN 1 4 0 Function Range Description ran NONE H peak memory The peak value stored in memory will be displayed if the continued P Hid remote input pins are short circuited if the short circuit is momentary then the d Hid display will return to normal measurement after 20 seconds If the short circuit H is held for 1 to 2 seconds or the power is removed from the instrument then the La memory will be reset Note if the operation is changed it is necessary to reset H Lo the memory e g if changed from H to La SP Rc no Ac SPER F3 RP set to H See P Ht d for further description ERL S Ehn S SCAR Shows whichever channel is or has been the highest Acele H 3H Shows whichever channel is or has been the highest r o Shows whichever channel is or has been the lowest then only changes if this channel value increases FUSE Shows the highest average of all channels FF Shows the maximum difference between any channels Fi Shows the maximum difference from channel 1 chi Shows channel 1 peak value che to Shows sele
6. RT D4 RTD3 RTD2 RTD1 Instrument rear panel 2 wire connection QO O A B C D E F H J K 1123 4 5 6 7 8 910111213 14151611718 BRR AR eee Q O MAINS EARTH COM N O AAA o SW AC NEUTRAL DC RELAY 1 oe AC ACTIVE DC RTD3 3W REMOTE RTD3 INPUT GND RTD2 3W RTD2 RTD1 3W RTD1 Instrument rear panel 3 wire connection Page 6 of 27 PM4RT8MAN 1 4 0 4 1 RTD connection examples Example 4 x 2 wire RTD 718 910 111213 1415161718 GND RTD4 SCS RTD2 RTD Example 3 x 3 wire RTD 7 8 9hol11 1213H 41511611718 RTD3 RTD GND TD RTD2 GND a RTD1 4 2 Power supply connections The power supply for the instrument is factory fitted and is of a fixed type If you are unsure of the supply requirement for your instrumentit can be determined by the model number on the instrument label PM4 RT8 240 Requires 240VAC PM4 RT8 110 Requires 110VAC PM4 RT8 24 Requires 24VAC PM4 RT8 DC Requires between 12 and 48VDC PM4 RT8 DCH Requires between 50 and 110VDC 4 3 Relay connections The PM4 is supplied with one alarm relay as standard with connections on terminals 5 and 6 Extra relays are optionally available The relay is a single pole single throw type form A and is rated at 5A 240VAC into a resistive load The relay contact is voltage free and may be program
7. the instrument Hold inthe 4 button and reapply power The display will briefly indicate CAL as part of the wake up messages when the EAL 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 B button Move to step 3 below 3 Within 2 seconds of releasing the 3 button press thepyelease the PY and 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 RL 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 8 of 27 Entering FURE Mode No special power up procedure is required to enter FUE mode 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 A button press thepyelease the BY and buttons together The display will now indicate FURE followed by the first function Alternative CA Mode Entry This alternative method allows CA mode entry without the need to remove power 1 Enter FUNE mode using the 2 steps above 2 When the first function appears press and hold the G button until you see the message FUNE followed by CAL the G
8. 3 wire RTD low range This selects the 180 C to 200 C range Fr 3H 3 wire RTD high range This selects the 180 C to 650 C range for Pt100 or 180 C to 550 C range for Pt1000 sensors Note if the input type is changed each input will need to be recalibrated The low ranges cover only part of the RTD range this is to allow improved accuracy over this range i e 0 1 of 380 against 0 1 of 730 or 830 red EYPE Selects RTD type from 88 Pt100 RTD input 888 Pt1000 RTD input The choice made is common for all inputs i e if 22 is selected then a Pt100 input is required for all channels Page 14 of 27 PM4RT8MAN 1 4 0 Function Range Description PAPE chr ito Yor to B Selects the number of input channels being used Select to 4 for three wire RTDs or to amp for two wire RTDs For the purposes of correct display relay operation amp retransmission it is important that the correct number of channels is chosen since channels without inputs will be seen by the PM4 as a high overrange and the error message will be displayed for that channel SEt d 5P SCAN H 39H AUSE d FF NE Or ch i to cha Selects the display operation mode from the choices below In each case below the amp or button can be used to toggle between channels If the d SP ur E function is set to MORE SE or SF then the channel number will be displayed prior to the read
9. A rec na ig aT ch 1 eh2 ch3 ch4 chS H SH j P chb chiorehB Anal t A H IH Lo RUSE di FF ot F i rece ene eran e eater ch 1 ch2 ch3 ch4 chS H SH i p chb chiorehB 300 500 200 2400 4850 SHUG REE O 9500 9 2 or 38 4 500 Prey Parity select NONE EUEN or Odd NONE DPU aenal commeanicalions di SP Conk POLL orA bu5S Eont Set unit address Addr for poll mode moa g Note Functions shown shaded on this table will be displayed only when those particular options are fitted Refer to the separate PM4 Panel Meter Optional Output Addendum booklet supplied when these options are fitted Settings for relays record settings here A1 A2 A3 A4 Axla AH AXHY AXEE Rxre Rxn a or ARxn c Axtkch Ax 5P or Ax t n a Ax GPEF Page 25 of 27 PM4RT8MAN 1 4 0 7 Specifications 7 1 Input Types Display resolution ADC Resolution Display accuracy Sample Rate Conversion Method Microprocessor Ambient Temperature Humidity Display Power Supply Power Consumption Output standard Relay Action 7 2 Output Options Extra Relays Analog Retransmission Serial Commuications Digital Retransmission DC Voltage Output 7 3 Bezel Size Case Size Panel Cut Out Connections Weight Technical Specifications Up to 4 x 3 wire Pt100 RTD or Up to 4 x 3 wire Pt1000 RTD or Up to 8 x 2 wire Pt100 RTD or U
10. Function Range Description Ai Hi 3H Alarm relay operation mode for relays 1 2 etc GPEr Bue The following choices are available for alarm operation mode ARES di FF Hi 3H relay operates from the highest input e g if the A iH function is set etc dF to 88 then relay 1 will activate if the highest input is 100 or higher ch i Lo relay operates from the lowest input e g if the A iH function is set to che GG then relay 1 will activate only when the lowest input is 100 or higher h n RUSE relay operates from the average of all inputs e g if the A iH function chS is setto 88 then relay 1 will activate only when the average of all inputs is i 100 or higher chb chor ci FF relay operates from the difference between the lowest and highest cha values e g if the A i function is set to 88 then relay 1 will activate only when the difference between the lowest amp highest inputs is 100 or higher ci F relay operates from the difference between channel 1 and the other channels operating If channel 1 is the lowest display value channel then the difference displayed will be positive If channel 1 is not the lowest display value channel the difference displayed will be negative e g If the A iH function is set to 88 then relay 1 will operate if any active channel becomes 100 or higher than channel 1 ch i ch etc relay operates from the selected channel e g If che is chosen and the A iH function is set
11. Value in memory PEE oe al a Value in memory output high limit dEPE Display decimal point Gora i Fier Digital filter range 0 to 8 G t08 B most filtering PAPE EYMPE Input type Freer Feu Fest or Fe su red EYPE RTD type GG or G33 l APE chnal Number of inputs i to or itob SCAR H SH Lo RUSE d FF SEE di SP Display type d F teh che chJ ch ch5 chb chiorecehB dESEYPE Degree type Of FF or AbS d SP um E Display units NONE OC OF chr oreh bh SCAN dL AY Scan delay seconds Sto 25a ch CARL Calibration for first a A che EARL etc second channel etc Livereading Page 24 of 27 PM4RT8MAN 1 4 0 ee Meaning of A Default Record Your Initial display display Next display Setting Settings UERL Eh Uncalibrate channel 1 UCAL Ch etc channel 2 etc EREET wa i RORE H P but 2 button operation La Hi ba or A cia AGRE NONE Pid dHid W Lo P3 nP Remote input operation H Lo SP Ac No Ac CAL S duttLorAci r SCAR HGH La RUSE di FF Bree ene di F i ch Lch tochB REES Access mode OFF ERSY AGRE or ALL GFF SPAC Setpoint access RA t 2etc Ri H IH Lo RUSE dI FF ot F R al Re Alarm SAN chiche ch3 cht chS HI 3H ae moce chb ehtorehnB HSH Lo RUIE d FF SEA BART Bargraph operation mode ch ch2d ch3 chY4 chS H 9H chb chiorehB H IH La RUGE di FF ot F i d3 GP Digital output mode ch f ch cha ch chS H 9H chb chiorehB aora nstaiesi n H GH Lo RUGE ot FF at
12. is the delay time before the alarm relay will activate or trip when an alarm 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 8 to 999 9 seconds Rxre 5 to 999 9 seconds Alarm reset time displays and sets the alarm relay reset time With the alarm 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 B to 498 9 seconds Axn a or Axn e RAxn aor Rxn e Alarm x normally open or normally closed displays and sets the setpoint alarm relay action to normally open de energised or normally closed energised when no alarm condition is present A normally closed alarm is often used to provide a power failure alarm indication Page 10 of 27 PM4RT8MAN 1 4 0 Function Range Description Ax SP BX E AxX t2 etc Rx SP Ax t Ax te2 etc Relay operation independent setpoint or trailing setpoint each alarm may be programmed to operate with an independent setpoint setting or may be linked or trailing to operate at a fixed difference to another relay setpoint The operation is as follows Alarm 1 Fi is always independent Alarm 2 AZ may be independent or may be linked
13. is to power up via CAL modei e there is no entry to FUE mode unless the instrument is powered up in CAL mode Page 9 of 27 PM4RT8MAN 1 4 0 Function Range Description Axta Value Alarm low setpoint displays and sets the low setpoint value for the designated alarm relay The low alarm setpoint may be disabled by pressing the PY and Rd pushbuttons simultaneously When the alarm is disabled the display will indicate GFF Use ES or d to adjust the setpoint 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 Axe Value Alarm high setpoint displays and sets the high setpoint value for the designated alarm relay The high alarm setpoint may be disabled by pressing the E and M pushbuttons simultaneously When the alarm is disabled the display will indicate GFF Use or 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 AKHY Gto qqaa units Alarm hysteresis deadband displays and sets the alarm hyst
14. to GE then relay one will activate if channel 2 input is 100 or higher bAr m SH Bargraph operation mode applicable only to bargraph displays ee The following choices are available for bargraph operation mode Ji FF l H 3H bargraph indicates the highest input seg i La bargraph indicates the lowest input c che RUSE bargraph indicates the average of all inputs ch d FF bargraph indicates the difference between the lowest and highest a values c ens ci F bargraph indicates the difference between channel 1 and the other chlor channels note this will be a positive reading only if channel 1 is lower than the chB other channels ch che etc bargraph indicates the selected channel rec H 3H FEE analog retransmission operation mode or 49 4 digital output or Lo retransmission Refer to the separate PM4 Panel Meter Optional Output d3 9P AUSE Addendum booklet supplied when optional outputs are fitted d FF The following choices are available for analog and digital retransmission di E t operation mode ae Hi 3H highest input is retransmitted cha Lo lowest input is retransmitted a RUSE the average of all inputs is retransmitted ch5 d FF the difference between the lowest and highest valuesis retransmitted nee or d F 1 the difference between channel 1 and the other channels will be retransmitted ch i che etc the selected channel is retransmitted Page 21 of 27 PM4RT8
15. J button will have to be held pressed for approximately 2 seconds 3 You should now return to the function you were in but have full access to EAL mode functions Note when you exit back to live reading the PM4 will remain in CA mode for approximately 4 minutes after this time you will need to repeat this process to enter RL mode PM4RT8MAN 1 4 0 Example Entering F UFZ mode to change alarm 1 high function A tH from GFF to EE Press amp release A Mid Press amp release ILI m Press amp release gt gt gt gt then press LN FU LL B until sd A IHi nee B until mm ze Press amp release me Press amp release oy amr LIL B O or until Fune End Example Entering CAL mode to change decimal point dE PE function from amp to E i Switch off Press amp hold Switch on mam gt gt gt gt instrument a instrument gt Hold E unti L A L Release Gi Press amp release rr Press 8 release wr m Press amp release gt gt gt gt ud i then press BY FU Le B until ow P LJ B until Press amp release Press amp release gt gt gt Com gt E B o B urti FURL no The alarm and brightness functions below are accessible via FRE 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 Ret ao and A3t o will all seen as functions on the display 5 1 Easy alarm relay adjustment access facility
16. MAN 1 4 0 Function Range Description rece Hi GH Analog retransmission mode for output 2 only seen when dual analog Lo retransmission option is fitted Refer to FEE function above for description RUSE d FF are ch i bRud 55 Set baud rate seen only with serial output option Refer to the separate PM4 oo Panel Meter Optional Output Addendum booklet supplied when this option is 255 fitted Select from 383 683 i266 243 483C 9600 19 2 or 38 4 Prey NONE Set parity seen only with serial output option Refer to the separate PM4 EUEN or Panel Meter Optional Output Addendum booklet supplied when this option is odd fitted Select parity check to either AGRE EYER or add D P ot nan Set RS232 485 interface mode seen only with serial output option Refer to d SP the separate PM4 Panel Meter Optional Output Addendum booklet supplied Eant when this option is fitted Gitor Select NONE d SP Cant POLL orA buS A buS Allows user to select the RS232 485 interface operation as follows nan No communications d SP Sends image data from the display without conversion to ASCII Eant Sends ASCII form of display data every time display is updated Pit Controlled by computer or PLC as host Host sends command via RS232 485 and instrument responds as requested R bw5 A special communications mode used with Windows compatible optional PC download software Refer to the user manual
17. PM4 RT8 Multi Input RTD Process Monitor 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 29476 2902 Internet www aicpl com au Table of Contents Introduction 223 saw eet aa Se Gee ele Be a 3 Basica Pd he a ate oe toes a Bee amp oa Ae 3 CANT AMOI wos Foy conte A a ee ae Pee a Be ck 3 PM4 RT8 inputs amp outputs 2 2 a ee 3 Mechanical Installation 0000 2 eee eee 4 Input Output Configuration 5 Electrical Installation ee eee ee 6 RTD connection examples o 7 Power supply connections o o oaoa a a 7 Relay connections eae wo o Be ete SL Gite S 7 Remote input connections 0000 eee eee 7 Explanation of Functions 2 802 eee 8 Easy alarm relay adjustment access facility 9 EMO Messages Serio a EA ETA eee e de 23 Function Tables iaa da e ee 24 Specifications s aia E AA a a E a a 26 Technical Specifications lt lt dora aa A G 26 O tp t OPi ONS rra a E a E a a ek E a 26 Physical Characteristics o a aS 26 Guarantee and Service noaoo ee es 27 RT08 25F13 Page 2 of 27 PM4RT8MAN 1 4 0 1 Introduction This manual contains information for the installation and operation of the PM4 RT8 Monitor The PM4 can acce
18. ation The PM4 Panel 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 to the instrument will cycle through a display sequence indicating the software version and other status information this indicates that the instrument is functioning Acknowledgement 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 wiring details for optional outputs refer to the separate PM4 Panel Meter Optional Output Addendum booklet supplied when options are fitted O Q A B CIDIE F H JIK 1 2 3 4 5 6 7 8 9hoh112131415161718 ES ES ae o MAINS EARTH COM N O as AC NEUTRAL DC RELAY 1 see AC ACTIVE DC RTDE REMOTE RTDS INPUT GND
19. can be selected for display on either left or right of temperature or you can choose not to display the channel number With some setups a letter can be seen H highest amp lowest A average or d difference Output Inputs 1x setpoint relay Up to 4 x 3 wire Pt100 Optional outputs or ____ Upto three extra setpoint relays Up to 4 x 3 wire Pt1000 _ ow Analog output single or dual or gt j lame y Serial comms RS232 or RS485 Up to 8 x 2 wire Pt100 BCD binary retransmission E PP ras Up to 8 x 2 wire Pt1000 Process units Temperature Setup pushbuttons Page 3 of 27 PM4RT8MAN 1 4 0 2 Mechanical Installation If a choice of mounting sites is available then choose a site as far away as possible from sources 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 instrumentin 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 d
20. condition and will be extinguished when the relay resets If set to an the relay will latch when it is activated by an alarm condition and can only be manually reset or acknowledged via the G button or remote input see P but and F FP functions If the alarm condition is acknowledged whilst still in alarm condition the relay will automatically deactivate when it moves out of alarm condition If a 5 digit display with alarm annunciators is used the annunciators will operate in the following manner 1 Input goes to alarm condition annunciator flashes on 80 off 20 relay is activated 2 Input goes out of alarm condition but has not been reset annunciator flashes on 20 off 80 relay activated 3 Input in alarm condition when manually acknowledged annunciator lit solidly relay is activated 4 Input out of alarm condition and reset or acknowledged annunciator light extinguished relay is de activated See also the A 1 GPEF Re GPEF etc functions br St Display brightness displays and sets the digital display brightness The display brightness is selectable from to 5 where lowest intensity and 15 highest intensity This function is useful for improving the display readability in dark areas or to reduce the power consumption of the instrument Page 11 of 27 PM4RT8MAN 1 4 0 Function Range Description Guth Gto iS Remote display brightness Displays and sets th
21. cted channel number peak value La valley memory The minimum value stored in memory will be displayed Otherwise operates in the same manner as the H function Note if the operation is changed it is necessary to reset the memory e g if changed from H to La SPFR F RP setto La See P Hi d for further description Chr ER Shows whichever channel is or has been the lowest HI 3H Shows whichever channel is or has been the lowest Lo Shows whichever channel is or has been the lowest then only changes if this channel value decreases RUSE Shows the lowest average of all channels d FF Shows the minimum difference between any channels di F i Shows the minimum difference from channel 1 chi Shows channel 1 valley value che to Shows selected channel number valley value chB H La toggle between H andta displays This function allows the remote input to be used to toggle between peak and valley memory displays The first operation of the remote input will cause the peak memory value to be displayed the next operation will give a valley memory display PH or Pia will flash before each display to give an indication of display type SPFR F3 RP set to H La See P HL d for further description Chri Operates as above H and ta but will toggle between high and low readings each time remote input is activated Page 19 of 27 PM4RT8MAN 1 4 0
22. d SP urw E function is set to show a channel number Lo Operates on the lowest of the inputs at the time e g when set to Lo if AP is set to P Ht d peak hold then when the remote input is activated the inputs will be scanned and the lowest of all the inputs will be displayed From then on the display will only change if this low channel value increases e goes more positive e the operation is allowing a peak hold of the channel with the lowest value at the time the remote input was activated The letter amp will be displayed if the ed SP un E function is set to show a channel number RUSE Operates on the average of the inputs at the time when set to RUSE if Ft AP is set to P HL d peak hold then when the remote input is activated the inputs will be scanned and the average displayed from then on the display will show the peak average reading until the remote input is released The letter A will be displayed if the d SP urm E function is set to show a channel number d FF Operates on the difference between the channels e g when set to di FF if Ft AP is set to P HL d peak hold then when the remote input is activated the inputs will be scanned and the largest difference between any two channels will be displayed from then on the display will show the maximum difference between any two channels until the remote input is released The letter d will be displayed if the ed SP un E function is set to show a channel number
23. e level for remote input brightness switching see F FP function When the remote input is set to duit the remote input can be used to switch between the display brightness level set by the br St function and the display brightness set by the dutt function The display brightness is selectable from amp to S where amp lowest intensity and 5 highest intensity This function is useful in reducing glare when the display needs to be viewed in both light and dark ambient light levels The functions which follow are accessible via CA mode only or if FREES function is set to ALL bAr Value Bar graph display low value seen only in bargraph display instruments Displays and sets the graph low value i e The value on the 7 segment display 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 bfer 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 as shown on the right where bargraph scale is 0 to 100 yet the display is showing 6 75 3 In this example the bargraph scale may be indicating percentage fill of a tank whilst the 7 segment display is indicating actual process units The bargraph is available as a 20 segment straight bar or 16 segment circular bargraph See the bRr amp YPE function which follows for ba
24. ect 588 in this function via the BY or M button See also FEE function analog output mode FEC Che Second analog recorder retransmission output low value seen only when the dual analog retransmission option is fitted See FEE function for description of operation See also FEE e function analog output 2 mode rect Che Second analog recorder retransmission output high value seen only when the dual analog retransmission option is fitted See FEE function for description of operation See also FEE 2 function analog output 2 mode Decimal point selection displays and sets the display resolution By pressing the or Ad pushbuttons the decimal point position may be set The display will indicate as follows B 1 resolution or 8 0 1 resolution 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 0 to 8 where 0 none and 8 most filtering A typical value for the digital filter would be 3 Use or MW to alter if required Note that at higher filter values the display update time will increase APE EyPE reel Teen Fe3tor Selects input type from Feel 2 wire RTD low range This selects the 180 C to 200 C range FEe2H 2 wire RTD high range This selects the 180 C to 650 C range for Pt100 or 180 C to 550 C range for Pt1000 sensors Fe 3t
25. el Meter Optional Output Addendum booklet supplied when this option is fitted Accepts any valid display value Determines the high scaling point for the b S5EtL mode and has no effect on other modes For example if d 3 is set to Gand d 97 is set to 65535 21 then the retransmission will not be scaled i e a display of 2 will cause a retransmission of 2 If d 9 is now changed to 32756 7 21 then a display of 2 will cause a retransmission of 4 Value Recorder retransmission output low value seen only when analog retransmission option fitted Refer to the separate PM4 Panel Meter Optional Output Addendum booklet supplied when this option is fitted Displays and sets the analog retransmission 4 20mA 0 1V or 0 10V link selectable output low value 4mA or OV in displayed engineering units e g if it is required to retransmit 4mA when the display indicates amp then select amp in this function via the or M button See also FEE function analog output mode rect Value Recorder retransmission output high value seen only when analog retransmission option fitted Refer to the separate PM4 Panel Meter Optional Output Addendum booklet supplied when this option is fitted Displays and sets the analog retransmission 4 20mA 0 1V or 0 10V link selectable output high value 20mA 1V or 10V in displayed engineering units e g if it is required to retransmit 20mA when the display indicates 583 then sel
26. eresis limit and is common for both high and low setpoint values The hysteresis value may be used to prevent too frequent operation of the setpoint relay when the measured value stays close to the setpoint Without a hysteresis setting AxHY set to zero the alarm will activate when the display value goes above 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 R iH is to 58 8 andA iH is set to 3 4 then the setpoint output relay will activate once the display value goes above 52 8 and will reset when the display value goes below 7 2 50 0 minus 3 0 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 La is to 26 3 and A tHY is set to 8 8 then the alarm output relay will activate when the display value falls below 28 8 and will reset when the display value goes above 38 8 20 0 plus 10 0 The hysteresis units are expressed in displayed engineering units Pxte 5 to 999 9 seconds Alarm trip time displays and sets the alarm trip time and is common for both alarm high and low setpoint values The trip time
27. high brightness LED display provides good visibility even in areas with high ambient light levels 1 1 Basic setup The steps below allow a basic setup for temperature display Refer to the Explanation of Functions chapter for a description of the functions mentioned below and for a description of other functions which may be required The basic setup requirements to obtain temperature displays for each input are 1 Connect the inputs as shown in Electrical Installation chapter 2 Enter CAL mode as shown at the beginning of the Explanation of Functions chapter 3 Step through to the RPE EYPE function and select the input type 4 Step through to the rE dt PE function and select the RTD type required 5 Step through to the RPE ehea function and select the number of inputs required 6 Step through to the SE t di SP function and select the display type required 7 Step through to the dE 3 E YPE function and select the units for display then press A to accept this last change 8 Press ly to exit the function setup display and return to the measurement display 1 2 Calibration A single point calibration is available for each channel If the sensor type is changed each channel will have to be recalibrated The calibration functions for each channel are named ch EAL for channel 1 calibration ehe CAL for channel 2 calibration See Explanation of Functions chapter for details 1 3 PM4 RT8 inputs amp outputs Channel number
28. iagram 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 bracketin place whilst tightening securing screws Vertical mounting bar graph displays Horizontal mounting ene 92mm gt i 4 S PANEL Tame i PANEL CUT OUT POUT 92mm OUT gt 95mm Mounting bracket max 115mm 5 on i A y 10mm TF 48mm EE 44mm 91mm 53mm 111mm 96mm 104mm gt Page 4 of 27 PM4RT8MAN 1 4 0 3 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 d h 2 Remove 4 x self tapping screws from back cover remove back cover by pulling it away from the instrument 3 Using a screwdriver remove the earth screw which passes through the case then slide out the board or boards 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 Replace the earth screw which passes through the case 7 Refit back cover and fix with the self tapping screws 8 Plug the terminal strips back into the rear of the instrument Page 5 of 27 PM4RT8MAN 1 4 0 4 Electrical Install
29. ing for that channel SERA the display will automatically scroll through each channel The time each channel display is held is set by the SCAM di AY function H SH the highest temperature will be displayed When scrolling through the displays using the BY or Rd button the message H 3H will be displayed prior to the reading and if eh r or cht is selected at the d SP un t function the channel number with the highest reading will then be displayed alongside the high value La the lowest temperature will be displayed When scrolling through the displays using the BY or button the message La will be displayed prior to the reading and if eh r or cht is selected at the d SP ur t function the channel number with the lowest reading will then be displayed alongside the low value RUSE the average of all temperatures will be displayed When scrolling through the displays using the Z or MW button the message AYSE will be displayed prior to the reading and if eh r or eh L is selected at the d SP urm E function the letter A will then be displayed alongside the average value di FF the difference between the highest and lowest temperatures will be displayed When scrolling through the displays using the amp or W button the message dl FF will be displayed prior to the reading and if eh r or eht is selected at the d SP wn E function the letter d will be displayed alongside the difference reading ci F the largest difference between chan
30. lable are b ne signed binary b n unsigned binary bed b SEL scaled binary bed binary coded decimal d3 5P Fi aor Digital output polarity seen only with digital output option Refer to the AH separate PM4 Panel Meter Optional Output Addendum booklet supplied when this option is fitted Select either A a active low output or AH active high output bed Gto BCD start display position seen only with digital output option Refer to the Stre number separate PM4 Panel Meter Optional Output Addendum booklet supplied of when this option is fitted display This function affects BCD mode only and determines the number of digits to digits skip when outputting from the display Select from 0 to number of display digits minus 4 minus 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 Value Scaled digital output low reading seen only with digital output option Refer to the separate PM4 Panel Meter Optional Output Addendum booklet supplied when this option is fitted Accepts any valid display value Determines the low scaling point for the b SEtL mode and has no effect on other modes See example which follows Page 13 of 27 PM4RT8MAN 1 4 0 Function Range Description d 37 Value Scaled digital output high reading seen only with digital output option Refer to the separate PM4 Pan
31. med for normally open or normally closed operation 4 4 Remote input connections Terminals 7 amp 8 are the remote input terminals The operation selected by the F RP function is activated when terminals 7 amp 8 are shorted via switch relay etc Page 7 of 27 PM4RT8MAN 1 4 0 5 Explanation of Functions The PM4 setup and calibration functions are configured through a push button sequence Two levels of access are provided for setting up and calibrating FUNE mode simple push button sequence allows access to commonly set up functions such as alarm setpoints AL mode power up sequence plus push button sequence allows access to all functions including calibration parameters The three push buttons located at the rear of the instrument also at the front on some display options are used to alter settings Once CAL or FUE mode has been entered you can step through the functions by pressing and releasing the A 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 Front view of instrument SETUP PUSHBUTTONS Fla w Rear view of instrument SETUP PUSH BUTTONS 00 T 1 213 415 6 7 8 9 74 ae on the following page Note the REES or F RP function can be used to block access to FUFIE mode Entering EAL Mode 1 Remove power from
32. message to indicate this when the la button has been pressed e g Eh ICAL End TEMPERATURE PROBE S R REFE RENCE THERMOMETER WATER BATH CALIBRATOR OR OTHER HEAT SOURCE Temperature C rAr D D r re mEmtc mg etc n a Uncalibration of selected channel used to set the selected channel 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 To clear the memory press the BY and M buttons simultaneously at the functions The message EARL Et r will be seen to indicate that the memory has cleared P but 2 button function applicable only in models with front panel G buttons The button may be set to operate some of the remote input functions see ro RP below for a description of these functions with the exception of FURE which is described below The 2 button is located at the front of 5 or 6 digit LED models If both the remote input and G button function are operated simultaneously the G button will override the remote input The functions below are as described in the F RP function below Functions available are RERNE no operation H peak memory La valley memory H La peak valley memory toggle or R e r latching memory reset or acknowledge Note To prevent accidental operation of the 2 button in the A c function it is necessary to hold the button in for 2 second
33. n is selected and on the right for the other choices Page 15 of 27 PM4RT8MAN 1 4 0 Function Range Description ror we pe dL AY Gto 250 Sets the time for which each channel display is held when SEt amp SP is set to SCAM If set to 8 the scanning operation will be disabled i e the display will not automatically scan and must be manually scanned using the Y or button chi CAL che CAL etc n a Temperature calibration for each input channel The procedure for calibrating each channel is a Ensure that an RTD input at a temperature of a known value is present at the input terminal of the channel being calibrated b At the calibration function for the channel being calibrated e g ch i TAL Press amp and simultaneously then release them The display will indicate the live input value Do not be concerned at this stage if the live input display value is not what is required It is important that the live input value seen is a steady value If the display value does not become stable within 20 seconds then the input needs to be investigated before proceeding with the scaling c Press then release the tg button The display will indicate Eh SEL or che SCEL etc followed by a value Use the E or button to change this to the known temperature value Press the 3 button to accept changes or the 2 button to abort the scaling If the scaling has been accepted there will be a display
34. nction Enter CAL mode and check the setting of these functions and alter if required Display shows alarm setpoint whenever an attempt to enter FURL mode is made this indicates that easy alarm access is activated at the RE ES function enter AL mode and check the setting of this function and alter if required Display show letter H A or d rather than the channel number this indicates that the SPFA ehn or SEt d SP function has been set to show the highest H lowest amp average A difference between all channels or difference from channel 1 d Check the SPFA chan and SEk d SP function and alter if required Note these letters or channel numbers will only be seen if the d SP Un amp function is set to cht Or chr Display not as expected when the remote input is used check that the SE d SP and SPFR chn i functions are set as required since they can be set to display different reading types For example the SE amp d SP can be set to show the difference between all channels whilst the SPFA ehn can be used with the remote input to give a display based on the average e g The remote input can be set to display hold the average value Note both the difference d FF and difference from channel 1 d F 1 selections may display the letter Y as the channel indicator if in doubt check which mode has been selected atthe SE amp t d SP and SPFR ehan i functions Page 23 of 27 PM4RT8MAN 1 4 0
35. nd 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 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 man
36. nel 1 and the other channels used will be displayed If channel 1 is the lowest value the difference displayed will be shown as a positive value If channel 1 is the highest value then the difference displayed will be a negative value When scrolling through the displays using the BY or MW button the message de F will be displayed prior to the reading and if eh r or cht is selected at the d SP un t function the letter d will be displayed alongside the difference reading ch eche etc the channel selected will be displayed as the default display dE3 EYPE Sets the degree measurement type choose from C displays in Centigrade F displays in Fahrenheit Fibs displays in Absolute Kelvin d 5P uw E Display unit certain display unit characters can be selected if required to display temperature units or to indicate which channel is being displayed Choices are RORE i e no display units e g 2345 oE e g SSF oF eg BOF E e g 45 30 ch r e g 315 where 4 is the channel shown right of temperature ch L e g 2375 where 4 is the channel shown left of temperature Note that when a display unit is chosen it will take up one or two of the available display digits this may limit the maximum or minimum value which can be displayed If the number becomes to large to display then an error message r will appear on the display The temperature display will be on the left of the display when ch
37. p to 8 x 2 wire Pt1000 RTD 1 or 0 1 1 in 20 000 0 1 of full scale when calibrated 1 digit 1 channel sampled per second for 3 wire inputs 1 channel sampled per half second for 2 wire inputs Dual Slope ADC MC68HC11F CMOS 10 to 60 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 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 depends on display type amp options Typical consumption for PM4 with no options is 100mA 12VDC and 50mA 24VDC 1 relay Form A Voltage free output rated 5A 240VAC resistive load Programmable N O or N C Same specs as Relay 1 up to 3 extra relays 4 to 20mA 0 to 1V or 0 to 10V link selectable single or dual analog output versions available 4 20mA will drive into resistive loads of up to 8009 RS232 or RS485 serial comms type is factory configured BCD Binary isolated Isolated 12V 24V standard 5V 10V link selectable rated at 20mA Physical Characteristics DIN 48mm x 96mm x 10mm 44mm x 91mm x 120mm behind face of panel 45mm x 92mm 1mm amp Omm Plug in screw terminals max 2 5mm wire 400 gms Basic model 450 gms with option card Page 26 of 27 PM4RT8MAN 1 4 0 Guarantee a
38. pt up to four 4 wire RTDs or eight 2 wire RTDs One input type can be selected for all inputs the choice of input type is Pt100 or Pt1000 RTD Resolution can be selected as 1 or 0 1 The display can be set to automatically scroll through each input or the PY or MW button can be used to manually scroll through each input display The instrument may be calibrated to display in C F or K A standard inbuilt relay provides an alarm control function Optional extra relays analog or binary BCD retransmission or serial communications may also be provided Relays can be set for latching or non latching operation Unless otherwise specified at the time of order your PM4 has been factory set to a standard configuration Like all other PM4 series instruments the configuration and calibration is easily changed by the user Full electrical isolation between power supply input and retransmission output optional 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 layout options in some cases the pushbuttons may be located on the front panel as well as the standard rear panel configuration The PM4 RT 8 is available in 5 6 or 5 digit plus bargraph LED display form The PM4 series of Panel Mount Monitors are designed for high reliability in industrial applications The
39. rgraph operation modes Y jo N oa lt LN Hil Los circular bar graph bArT Bargraph ends at this segment bAr Bargraph starts at this segment bArT Value Bargraph display high value seen only in bargraph display instruments Displays and sets the bar graph high value e the value on the 7 segment 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 Page 12 of 27 PM4RT8MAN 1 4 0 Function Range Description bAr bAr Bar graph display operation mode seen only in bargraph display instruments ESPE E Allows selection of bargraph operation mode choices are of a bRr conventional solid bargraph display i e all LED s illuminated when at full C bRr scale e g when scaling the display use the bRr and bAr functions e g bRr 8and bRr 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 88 5 dot single dot display A single segment will be lit to indicate the input readings position on the scale e g when scaling the display use the bArr and bAr functions e g bAr Gand bRr 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 8 8 Note
40. s to perform the selected operation Page 16 of 27 PM4RT8MAN 1 4 0 Function Range Description ran NONE Remote input function terminals 7 and 8 at the rear of the instrument are the Pid remote input terminals When these pins are short circuited via a pushbutton d Hid or keyswitch the instrument will perform the selected remote input function A H message will flash to indicate which function has been selected when the La remote input pins are short circuited Some remote input and 2 button H Lo operations are also controlled by the SPFRE AA function the table below SP Re each function below shows the effect of each setting on the operation The Ma Ae remote input functions are as follows Pires NGNE no remote function required i gt P Ht d peak hold The display will show the peak value only whilst the remote Acelere input pins are short circuited SPER FMP set to P Hid chr SCAR Scans all channels e g when set to SEAM if F MP is set to P HL d peak hold then when the remote input is activated the inputs will be scanned and the peak hold will operate on the channel with the highest reading If the channel number is being displayed see d SP ur t function then the channel number for the input with the highest peak reading will be seen on the display Hi 3H Operates in the same manner as SE AF above but does not show the channel number instead shows the letter H if the
41. supplied with this optional software Addr Gto 3 Set unit address for polled PGLL mode 0 to 31 seen only with serial output option 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 or ASCII is address 0 42 DEC or 2A HEX or ASCII addresses unit 10 Returning to normal measure mode When the calibration has been completed it is advisable to return the instrument to the normal mode where calibration functions cannot be tampered with To return to normal mode turn off power to the instrument wait a few seconds and then restore power Page 22 of 27 PM4RT8MAN 1 4 0 5 2 Error messages Display shows Eh SAI RErr Che 9R A Err etc thismessage may bee seen following an attempt to calibrate an input The message indicates that the input resistance measured does not correspond to the scale value entered Check thatthe input sensor and that the correct selection has been made in software for this type of sensor Unstable display if the display is not stable the us
42. the remote input F RP function or 2 button P b ut Lo function operation See F RP function for a description of the operation of AUSE the SPFN cha functions d FF ari ch i che to cha ACCS GFF Access mode the access mode function RAEES has four possible settings ERSY namely GFF ERSY AGRE and ALL If set to GFF the mode function has no RONE or effect on alarm relay operation If set to EASY the easy alarm access mode ALL will be activated see details at the beginning of this chapter preceding the iLa function If set to AGRE there will be no access to any functions via FUNE mode entry via SAL mode must be made to gain access to alarm and calibration functions If set to At amp then access to all functions including calibration functions can be gained via FRE mode SPAC Ai Setpoint access seen only if more than 1 relay fitted Aia Sets the access to the alarm relay set points The following choices are etc available R 1 allows setpoint access to alarm 1 only A 1 2 allows access to alarms 1 and 2 A 1 3 allows access to alarms 1 2 and 3 A 1 45 allows access to alarms 1 2 3 and 4 The remote input function F RP must be set to SP AE for this function to operate Note Only the setpoints which have been given a value will be accessible e g if A iH is set to GFF then there will be no access to the A iH function when SPARE is used Page 20 of 27 PM4RT8MAN 1 4 0
43. this could also be set up as a centre zero single dot display by entering a negative value and positive value e g bAr 88 bAr 80 d dat 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 the two segments e g when scaling the display use the bAr and bRr functions e g bAr Gand bAr G8 will give a bargraph with the bottom two segments lit ata 7 segment display reading of B and the top two segments lit with a 7 segment display reading of B8 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 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 e g when scaling the display use the bRr and bRr functions e g bRr O and bRr 88 will give a bargraph with all the bottom half segments lit at a 7 segment display reading of 88 and all the top segments lit with a 7 segment display reading of 88 d3 8P b ne Digital output mode seen only with digital output option Refer to the separate bon PM4 Panel Meter Optional Output Addendum booklet supplied when this b SEtL option is fitted or Selections avai
44. to Alarm 1 Alarm 3 R3 may be independent or may be linked to Alarm 1 or Alarm 2 Alarm 4 A may be independent or may be linked to Alarm 1 Alarm 2 or Alarm 3 The operation of each alarm is selectable within the Function Setup Mode by selecting for example Alarm 4 R4 SP Alarm 4 normal setpoint or A4 amp i Alarm 4 trailing Alarm 1 or RM E2 Alarm 4 trailing Alarm 2 or A4 amp 3 Alarm 4 trailing Alarm 3 For trailing set points the setpoint value is entered as the difference from the setpoint being trailed If the trailing setpoint is to operate ahead of the prime setpoint then the value is entered as a positive number and if operating behind the prime setpoint then the value is entered as a negative number For example with Alarm 2 set to trail alarm 1 if A iH is set to 100 and RH is set to 50 then Alarm 1 will activate at 100 and alarm 2 will activate at 150 i e 100 50 If Alarm 2 had been set at 50 then alarm 2 would activate at 50 i e 100 50 See the trailing alarm table which follows Trailing Alarm Table Showing Possible Alarm Assignments Re AZ AMY RA A k i At RAE Ra R3Ite Rute AZ RHEI Rx Lich ar Or OFF Relay latching on or off When set to GFF the relay will reset automatically when the display shows the input is not in alarm condition If a 5 digit display with alarm annunciators is used the annunciator will light solidly when the input is in alarm
45. ual cause is either thatthe input signal is unstable or that the calibration scaling was incorrectly attempted If the calibration scaling was unsuccessful then uncalibrating the display at the YEAL function should return the display to stable readings but the previous calibration scaling values will be lost If the display is still not stable after uncalibrating then check the input for stability and noise Display shows this message indicates that the input signal is higher than the range selected e g for an input set for FE 3 low range 3 wire RTD the message will be seen if the input goes much higher than 220 C Check the RPE amp YPE function setting corresponds to the temperature range you wish to display if this is correct then check that the sensor resistance is within the expected range for that temperature Display shows ar or e E or a F this message indicates either that the number is too big to display This can particularly easily occur if a display showing units and or channels is being used e g i255 C can be displayed on a 6 digit display but the ar message will be seen instead of this value if a 5 digit display is used In these circumstances it may be necessary to remove the display units or reduce the resolution by setting no decimal point places Display shows G REES or iG SPRE this message indicates that access to FURL mode has been blocked by either the F RP function or the RE ES fu
46. ufactured in Australia Page 27 of 27 PM4RT8MAN 1 4 0
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