Honeywell VRX180 - Manual (Page 260)

Maintenance
Video Recorder – User Manual 246
Additional calibration selections allow you to perform other calibration procedures:
CALIBRATE REFERENCE JUNCTIONS – for calibrating the two Cold Junction (CJ) references on AI
module.
COPY ANALOG INPUT CALIBRATION – for copying calibration values from one AI module channel to
another.
RESET ANALOG INPUT CALIBRATION – to restore AI module channels to their factory calibration.
RESET REF. FUNCTION CALIBRATION – to restore CJ reference to their factory calibration values.
8.5 AO MODULE calibration
Two calibration selections are accessible under the CALIBRATE AO menu selection
CALIBRATE AO CHANNEL – to calibrate the zero offset and span values of the AO module channels to
user-defined values.
RESTORE AO FACTORY CAL – to restore factory calibrated to an AO module channel.
The AO module contains a wire jumper (labeled ST1) on the PWA. Cutting this jumper will prevent any
changes to initial calibration values of the module and prevent any further field calibration.
See Figure 8-1 for the location of the jumper.
S T 1
O U T 4
+
_
O U T 3
+
_
O U T 2
+
_
O U T 1
+
_
0-2
0m
A
!
C a va lier S T 1
M o du le d e s o rtie
an alog iq u e
Wire Jumper ST1
Analog Output
Module
Figure 8-1 AO Module Jumper ST1
Calibrate Analog Outputs
For CAT calibration, a precision milliammeter or a precision resistor and voltmeter is required.