
5-12 Controller Cards
UM4.6:CS6003 Original — December 1991
Step 6: Ensure the INT/EXT switch is set to INT.
Step 7: Press the CAL LOW switch.
Step 8: Observe the CAL STATUS indicators and adjust the ZERO
(R96) potentiometer on the process I/O card to the mid range
of settings over which the OK indicator lights.
Step 9: Press the CAL HIGH switch.
Step 10: Observe the CAL STATUS indicators and adjust the SPAN
(R97) potentiometer on the process I/O card to the mid range
of settings over which the OK indicator lights.
Step 11: Repeat Steps 7 thru 10 until proper indications occur without
adjustment on any step.
Step 12: Connect a voltmeter across the +CO2 and –CO2 breakout
terminals. Ensure the calibrator is in the CAL HIGH mode.
The voltmeter should read 5.00
± 0.01 volts dc. If not, adjust
the process I/O card Current Output 2 SPAN (R95)
potentiometer to obtain the proper reading.
Step 13: Disconnect the voltmeter from the +CO2 and –CO2 breakout
terminals and connect the voltmeter across the +CO1 and
–CO2 breakout terminals. The voltmeter should read 5.00
± 0.01 volts dc. If not, adjust the process I/O card Current
Output 1 SPAN (R94) potentiometer to obtain the proper
reading.
Step 14: Press the CAL LOW mode switch and observe the voltmeter.
The voltmeter should read 1.00
± 0.02 volts dc. If not, the
process I/O card requires repair.
Step 15: Disconnect the voltmeter from the +CO1 and –CO2 breakout
terminals and connect the voltmeter across the +CO2 and
–CO2 breakout terminals. The voltmeter should read 1.00
± 0.02 volts dc. If not, the process I/O card requires repair.
Step 16: Press the SCAN switch and observe the calibrator CAL
STATUS indicators. The OK indicator should light. If the
SCAN ERROR indicator lights, repeat Steps 9 thru 16 to
obtain the proper indication.
Step 17: Disconnect the voltmeter and resistors.
Step 18: Set the calibrator ON/OFF switch to OFF.
Step 19: Remove the process I/O card.
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