Red Lion PCU - Manual (Page 87)

CALIBRATION
When re-calibration is required (generally every two years), this procedure
should be performed by qualified technicians using appropriate equipment.
Equipment source accuracy of 0.01% or better is required.
The procedure consists of: applying accurate voltage signals, applying
precision mA current and measuring accurate mA currents, among others.
Allow a 30 minute warm-up period before starting this procedure.
This procedure may be aborted by disconnecting power to the controller
before exiting the configuration mode. The existing calibration settings
remain in affect.
Configure Step 9 - Factory Service Operations (9-Fs)
Display Parameter Description/Comments
Code Enter factory service
function code 48 Calibrate instrument
CAL Voltage and Current
Calibration yes/no Calibration of voltage input is done
first.
ANCL Analog Output
Calibration yes/no This parameter will not appear if
analog output option is not installed.
2CAL Second Analog
Input Calibration yes/no This parameter will not appear if
second analog input is not installed.
Voltage Calibration
Connect precision voltage source with an accuracy of 0.01% to terminals
(+) #8 and (-) #10 for voltage calibration.
Display Parameter Description/Comments
StP1 0.000 V step Apply 0.000 V, wait 10 seconds, press PAR.
StP2 1.667 V step Apply 1.667 V, wait 10 seconds, press PAR.
StP3 3.333 V step Apply 3.333 V, wait 10 seconds, press PAR.
StP4 5.000 V step Apply 5.000 V, wait 10 seconds, press PAR.
StP5 6.667 V step Apply 6.667 V, wait 10 seconds, press PAR.
StP6 8.333 V step Apply 8.333 V, Wait 10 seconds, press PAR.
StP7 10.000 V step Apply 10.000 V, wait 10 seconds, press PAR.
StP- Pause The controller imposes a 5 sec. delay (Keep
the 10.000 V signal applied). The unit
automatically advances to StPA.
Current Calibration
Connect a precision current source with an accuracy of 0.01% to terminals
(+) #9 and (-) #10 for current calibration when step A appears.
Display Parameter Description/Comments
StPA 0.000 mA Apply 0.000 mA, wait 10 seconds, press PAR.
StPB 20.000 mA Apply 20.000 mA, wait 10 seconds, press PAR.
The unit automatically advances to analog
output calibration if the option is installed.
Analog Output Calibration (ANCL)
4 to 20 mA
Press PAR until “ANCL” appears in the display. Connect precision
ammeter (0.1% accuracy) to rear terminals (+) #11 and (-) #12.
Display Parameter Description/Comments
ANC1 Analog output
4 mA code
value Observe current reading. If 4.00 mA, press
PAR. If not equal, modify existing code value
using up and down buttons to achieve 4.00
mA. Press PAR.
ANC2 Analog output
20 mA code
value Observe current reading. If 20.00 mA, Press
PAR. If not equal, modify existing code value
using up and down buttons to achieve 20.00
mA. Press PAR.
0 to 10 VDC
Press PAR until “ANCL” appears in the display. Connect a precision
voltmeter (0.1% accuracy) to rear terminals (+) #11 and (-) #12.
Display Parameter Description/Comments
ANC1 Analog output
0 VDC code
value Observe voltage reading. If 0.00 VDC, press
PAR. If not equal, modify existing code value
using up and down buttons to achieve 0.00
VDC. Press PAR.
ANC2 Analog output
10 VDC code
value Observe voltage reading. If 10.00 VDC, Press
PAR. If not equal, modify existing code value
using up and down buttons to achieve 10.00
VDC. Press PAR.
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