
5-25Controller Cards
Original — December 1991 UM4.6:CS6003
X00825–A
R39 Span AdjustmentR38 Zero AdjustmentR11 Span Current Output
Figure 5-13. Type CL7311/CL7312 Redundant Manual Control Unit
5.7.2 Calibration Procedure
Use the following procedure to calibrate the card:
Step 1: Verify that the calibrator ON/OFF switch is OFF.
Step 2: Using the redundant manual adapter card, insert the
redundant manual card shown in Figure 5-13, in the test slot
labeled CONFIG SVCE XFER IND.
Step 3: Set the calibrator ON/OFF switch to ON.
Step 4: Press the calibrator RESET switch. The IN PROGRESS
indicator lights and remains lit. The green LED on the front of
the redundant manual card goes out (the LED may or may
not be lit) until the card self-test is finished. When finished the
green LED on the redundant manual card should light. If the
green LED fails to light in one minute, the redundant manual
card requires repair.
Step 5: Ensure the INT/EXT switch is set to INT.
Step 6: Press the CAL LOW switch. The OK indicator of the CAL
STATUS indicators should light. If not, adjust the ZERO (R38)
potentiometer on the redundant manual card to the mid range
of settings over which the OK indicator lights.
Step 7: Press the CAL HIGH mode switch. The OK indicator of the
CAL STATUS indicators should light. If not, adjust the SPAN
(R39) potentiometer on the redundant manual card to the mid
range of settings over which the OK indicator lights.
Step 8: Repeat Steps 6 and 7 until readings occur without
adjustments on any step.
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