Response Electronics CL6011B Dokumentacja Strona 95

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5-17Controller Cards
Original — December 1991 UM4.6:CS6003
5.4.2 Calibration Procedure
Use the following procedure to calibrate the card:
Step 1: Verify that the calibrator ON/OFF switch is OFF.
Step 2: Insert the computing controller card shown in Figure 5-10, in
the test slot labeled COMPUTING.
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 until the card self-test is
finished. When finished, the COMPLETE indicator lights. If
the COMPLETE indicator fails to light in one minute, the
computing controller card requires repair.
Step 5: Ensure the INT/EXT switch is set to INT.
Step 6: Connect jumpers from the +CO1 and –CO1 breakout
terminals to the 250 ohm LOAD terminals.
Step 7: Connect the voltmeter across the 250 ohm LOAD terminals.
Step 8: Press the CAL LOW mode switch. The OK indicator of the
CAL STATUS indicators should light. If not, adjust the ZERO
(R44) potentiometer on the computing controller card to the
mid range of settings over which the OK indicator lights.
Step 9: Observe the CONTROLLER DO indicators. CONTROLLER
DO indicators 1 and 2 light in sequence and then repeat the
cycle. If the CONTROLLER DO indicators fail to light or light
in the wrong sequence, the computing controller card requires
repair.
Step 10: Press the CAL HIGH mode switch. The OK indicator of the
CAL STATUS indicators should light. If not, adjust the SPAN
(R45) potentiometer on the computing controller card to the
mid range of settings over which the OK indicator lights.
Step 11: Observe the CONTROLLER DO indicators. CONTROLLER
DO indicators 1 and 2 blink on and off in a binary counting
test. If CONTROLLER DO indicators 1 and 2 fail to blink on
and off, the computing controller requires repair.
Step 12: Repeat Steps 8 thru 11 until proper indications occur without
adjustment on any step.
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