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AMALGAMATED INSTRUMENT CO
RM4-LN Lineariser
DIN Rail Pro cess Moni tor/Con trol ler
In puts from 0-20mA, 4-20mA,
±100mV, ±1V,±10VC, ±100VDC
or slidewire.
Op er a tion & In struc tion Manual
Telephone: (02) 9476 2244
Facsimile: (02) 9476 2902
PTY
ACN 001 589 43 9
LTD
www.aicpl.com.au
E-mai l: sales@aicpl.com.au
AS/NZS
Quality
ISO 9001
Endorsed
Lic. No .
QEC 6187
Company
Stan dards
Australia
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Related Manuals for AMALGAMATED INSTRUMENT RM4-LN
Summary of Contents for AMALGAMATED INSTRUMENT RM4-LN
- Page 1 RM4-LN Lineariser DIN Rail Pro cess Moni tor/Con trol ler In puts from 0-20mA, 4-20mA, ±100mV, ±1V,±10VC, ±100VDC or slidewire. Op er a tion & In struc tion Manual AS/NZS AMALGAMATED INSTRUMENT CO Quality ACN 001 589 43 9 ISO 9001 Endorsed Lic.
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Page 2: Table Of Contents
Ta ble of Con tents In tro duc tion ........3 Me chan i cal in stal la tion . -
Page 3: In Tro Duc Tion
The RM4 may be configured to accept inputs of 0 to 20mA, 4 to 20mA, ±100mV, ±1V, ±10V, ±100VDC or slidewire. The RM4-LN offers the choice of linear, square root or linearised display. Two separate sets of calibration scaling values can be stored with the display choice being made via the remote input. In lineariser operation up to 50 points may be entered. -
Page 4: Me Chani Cal Instal La Tion
Me chani cal instal la tion The RM4 is designed for DIN rail, horizontal mounting. The instrument snaps on 35mm DIN standard rails (EN50022). Cut the DIN rail to length and install where required. To install the RM4, simply clip onto the rail as shown below. To remove the RM4 lever the lower arm downwards using a broad bladed screwdriver to pull the clip away from the DIN rail. -
Page 5: Elec Tri Cal Instal La Tion
Elec tri cal instal la tion 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 terminal blocks allow for wires of up to 2.5mm to be fitted for power supply and relays 1 and 2 or 1.5mm... - Page 6 4 wire 4-20mA. 4 wire 4-20mA. Powered via standard Externally powered. 24V unregulated. External power supply Supply Transmitter Signal Transmitter Shield Shield Ensure that link Ens ure that link settings correspond s ettings correspond to input ty pe to input type 3 wire 4-20mA.
- Page 7 2 wire 4-20mA. 2 wire 4-20mA. Powered via optional Externally powered. 12 or 24V regulated. External power supply Transmitter Transmitter Shield Shield Ensure that link Ensure that link settings correspond settings correspond to input type to input type DC voltage input Slidewire input Sensor Shield...
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Page 8: Re Mote In Put Con Nec Tions
3 .2 Re mote in put con nec tions The selected remote input function can be operated via an external contact closure via a switch, relay or open collector transistor switch. A momentary action is required for functions such as tARE and ZERO, a latching switch or normally closed momentary switch may be required for functions such as peak hold. - Page 9 Link settings for the main input board are as shown below. For optional output link settings consult the appropriate appendix in this manual. ±10V ±100mV ±1V links links links Main circuit board 0-20mA or ±2mA ±100V 4-20mA links links links TX SUPPLY Slidewire links...
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Page 10: Ex Pla Na Tion Of Func Tions
Ex pla na tion of func tions The RM4 setup and calibration functions are configured through a push button sequence. Two levels of access are provided for setting up and calibrating:- FUNC mode (simple push button sequence) allows access to alarm relay, preset value & display brightness functions. - Page 11 Function Range Description C.SEt -19999 Analog control setpoint - seen only when the analog retransmission option to 99999 is fitted and REC ctrI is set to on. Refer to the separate “RM4 DIN Rail Meter Optional Output Addendum” booklet supplied when this option is fitted.
- Page 12 ctrI 1 to PI relay control span - seen only when the A1 OPER is set to A1.tP or SPAN 99999 A1.Fr. See “Setting up the relay PI controller” appendix. A1. PG -19.999 PI relay proportional gain - seen only when the Ax OPER is set to Ax.tP or to 32.767 Ax.Fr.
- Page 13 C.SPN 0 to Control span - seen only when the analog retransmission option is fitted 99999 and REC ctrI is set to on. Refer to the separate “RM4 DIN Rail Meter Optional Output Addendum” booklet supplied when this option is fitted. C.
- Page 14 ZERO -19999 Zero range - the zero range function allows a limit value to be set (in RNGE to 99999 engineering units) above which the display will not zero i.e. if a zero operation is attempted via the P button, remote input or set zero function or OFF when the display value is greater than the zero range setting the display will refuse to zero and give a ZERO RNGE Err message (note that the...
- Page 15 R.INP NONE, Remote input - displays and sets the special function input selection, see P.HLd, “Remote input functions” chapter. d.HLd, Hi, Lo, Hi Lo, tARE, ZERO, SP.Ac, No.Ac, CAL.s, dISP or duLL Nett on or OFF Nett value display mode - The nett value is only seen when the remote input or P button is used to toggle between the nett and gross values.
- Page 16 LiuE, Analog retransmission mode - The description below applies to both the tARE, analog retransmission mode (4-20mA or DC Volts) and the serial (RS232 P.HLd, or RS485) communications. The serial communications mode is set via d.HLd, the SERL function. Refer to the separate “RM4 DIN Rail Meter Optional Hi, Lo or Output Addendum”...
- Page 17 HIGH Value or High overrange limit value - the display can be set to show an overrange dISP message if the display value rises above the HIGH dISP setting. For example if HIGH dISP is set to 1000 then once the display reading rises above 1000 the message -or- or the display value (see dISP function) will flash instead of the normal display units.
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Page 18: Er Ror Mes Sages
SERL LiuE, Serial communications output mode - see REC function for description. tARE, Refer to the separate “RM4 DIN Rail Meter Optional Output Addendum” P.HLd, booklet supplied when this option is fitted. d.HLd, Hi, Lo, dISP or HiLo Returning to the normal measure mode When the calibration procedure has been completed it is advisable to return the instrument to the normal mode (where calibration functions cannot be tampered with). -
Page 19: Func Tion Table
Func tion table Mean ing of De fault Re cord Your Ini tial dis play Next dis play dis play Set ting Set tings Analog PI control C.Set Value in memory setpoint A1.SP Relay 1 control setpoint Value in memory See following table Alarm x Low A x Lo... - Page 20 Analog PI control C. PO 0 to 100 proportional offset Analog PI control C. IG -19.999 to 32.767 integral gain Analog PI control CIL.H 0 to 100 integral limit high Analog PI control CIL.L 0 to 100 integral limit low Analog PI control REC SPAC on or OFF...
- Page 21 Set tings for setpoint re lays - rec ord set tings here AxLo AxHi AxHY Axtt Axrt Axn.o or Axn.c Ax.SP or Ax.t1 A1 OPER Page 21 of 42 RM4LNMAN-1.3-0...
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Page 22: Cal I Bra Tion
Cal i bra tion A calibration scaling must be undertaken prior to entering values into the linearisation table. Two decimal point places will automatically be used when scaling the instrument i.e. scaling values in the range -199.99 to 999.99 can be used. When deciding on scaling to be used it is important to understand that the scaling used will determine the range of values which can be entered as the P values in the lineariser table. - Page 23 Example - Scaling using two points CAL2 The message will be seen. Enter via mode Change the input value then press simultaneously. Place a known input into If the "live" display is stable the instrument press the button. The SCL2 message will be seen CAL1...
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Page 24: Lineariser Operation
Lineariser operation The following five functions are used to set up the lineariser table. The lineariser is of the X,Y type with space for up to 50 points to be programmed and stored. All points are stored in battery backed memory and will be retained when power is removed. - Page 25 A pressure transmitter with a 4-20mA output is installed near the base of an irregularly shaped tank, see picture above, which contains a liquid. The transmitter is connected to a RM4-LN and 10 linearising points are required to measure the number of litres in the tank. The output from the transmitter will be linear between P9 and P10 since the sides of the tank are straight.
- Page 26 l. Press, then release, the F button. The display will indicate Y1 followed by a number. Use the ^ or v button to change this to 0. m. Press, then release, the F button. The display will indicate P2 followed by a number. Use the ^ or v button to change this to 4.72.
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Page 27: Lineariser Ta Ble
Line ariser ta ble Lineariser Table Complete and retain for reference Y Value Y Value P Value P Value (Value to be (Value to be dis played) dis played) Page 27 of 42 RM4LNMAN-1.3-0... -
Page 28: Alarm Relays
Alarm relays The RM4 is provided with 2 alarm relays as standard. These two relays can be configured for either alarm on/off operation or as PI control relays. See "Setting up the relay PI control" addendum for details of PI control operation. One or two extra optional independent alarm relays may also be provided, Relays are designated AI, A2 etc in the function settings. - Page 29 around the setpoint value. The hysteresis Dis play Value 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 Setpoint relay reset the alarm. resets Setpoint e.g.
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Page 30: Easy Alarm Ac Cess
Easy Alarm Ac cess The RM4 has an easy alarm access facility which allows operator access to the selected alarm setpoints (only to the setpoints selected at the SPAC function) simply by pressing the F button. The first setpoint will then appear and changes to this setpoint may be made to this setpoint via the ^ or v buttons. - Page 31 Example 5 - A1 is set to Hi and R.INP is set to Hi If A1Hi is set to 50 and the peak memory value becomes greater than 50 then alarm 1 will be constantly activated at this point and will only become de activated when the memory is reset at a value below 50.
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Page 32: Re Mote Input Func Tions
Re mote input func tions Remote input operation is via voltage free contacts on the instrument terminal block (terminals 5 and 9) shorting together these terminals will cause the selected function to operate. The remote input may be either a bi-state contact closure (toggle switch, PLC or other external switch) or a momentary or latching switch contact, depending on the function requirements. - Page 33 dISP Display toggle - allows toggling via the remote input between the live input value (preceded by the message INPt) and the lineariser table value (preceded by the message Linr). duLL Dull - when the remote input is set to duLL the remote input can be used to switch between the display brightness level set by the brGt function and the display brightness set by the duLL function.
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Page 34: Speci Fi Ca Tions
Speci fi ca tions 11 .1 Tech ni cal Speci fi ca tions Link selectable ±0 to 20mA, ±4 to 20mA or In put Types: DC Volts ±100mV, ±1V, ±10V, ±100V or Slidewire, 3 wire 0-1kΩ to 0-1MΩ value slidewires Lineariser points: Up to 50 points (X,Y) Im ped ance:... -
Page 35: Set Ting Up The Re Lay Pi Con Trol Ler
Appendix - Set ting up the re lay PI con trol ler PI control functions will only be seen if PI control software is fitted. The Relay Proportional + Integral Controller can be made to operate in either pulse width control or frequency control mode via the Ax OPER function. - Page 36 PROCESS Proce ss a bove set po int Process at setpoint SETPOINT Pro ce ss below s etpoi nt TI ME ctrI SPAN (proportional control span) The function of the control span is to define the limit to which the proportional control values will relate.
- Page 37 adjusted the control output is varied to maintain control by keeping the process variable at the same value as the control setpoint. Since the integral gain is time based the output will gradually increase if the error does not decrease i.e. if the measured value remains constant and there is an error (a difference between the measured value and the setpoint) then the relay on time for each cycle will be increased compared to the previous on time.
- Page 38 the time and de-activated for 50% of the time when the measured value is at the setpoint. If set at 100.0 then the relay will be activated for 100% of the time when the measured value is at the setpoint. Relay etc.
- Page 39 Frequency modulation control mode To use pulse width modulation control Ax.Fr must be selected at the Ax OPER function. Frequency control - pulse frequency varies according to settings and control requirement Relay time Relay time In frequency modulation mode the relay on time is fixed. A minimum relay off time can also be set.
- Page 40 increased compared to the previous frequency output. The higher the proportional gain, the greater the degree by which the on to off ratio will be affected i.e. the response will be greater at higher integral gain settings. With an integral gain of 1.000 a 100% error will cause the integral action to try to correct at the rate of 100%/minute.
- Page 41 Setting up the frequency controller 1. Set the Ax OPER func tion to AxFr 2. Set the con trol set point AxSP to the re quired set ting. 3. Set the con trol span ctrI SPAN to the re quired set ting. 4.
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Page 42: Guar An Tee & Service
Guar an tee & 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.
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