PCU10000 Datasheet, PDF (87/96 Pages) Red Lion Controls. Inc – THE PROCESS CONTROL UNIT

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
Code Enter factory service 48
function code
CAL
Voltage and Current yes/no
Calibration
ANCL Analog Output
Calibration
yes/no
2CAL Second Analog
Input Calibration
yes/no
Description/Comments
Calibrate instrument
Calibration of voltage input is done
first.
This parameter will not appear if
analog output option is not installed.
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
StP1
StP2
StP3
StP4
StP5
StP6
StP7
StP-
Parameter
0.000 V step
1.667 V step
3.333 V step
5.000 V step
6.667 V step
8.333 V step
10.000 V step
Pause
Description/Comments
Apply 0.000 V, wait 10 seconds, press PAR.
Apply 1.667 V, wait 10 seconds, press PAR.
Apply 3.333 V, wait 10 seconds, press PAR.
Apply 5.000 V, wait 10 seconds, press PAR.
Apply 6.667 V, wait 10 seconds, press PAR.
Apply 8.333 V, Wait 10 seconds, press PAR.
Apply 10.000 V, wait 10 seconds, press PAR.
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
StPA
StPB
Parameter
0.000 mA
20.000 mA
Description/Comments
Apply 0.000 mA, wait 10 seconds, press PAR.
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
ANC1
Parameter
Analog output
4 mA code
value
ANC2
Analog output
20 mA code
value
Description/Comments
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.
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
ANC1
Parameter
Analog output
0 VDC code
value
ANC2
Analog output
10 VDC code
value
Description/Comments
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.
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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