
4-23Input and Output Cards
Original — December 1991 UM4.6:CS6003
Step 10: Turn on the voltage source and adjust the output voltage to
10 volts dc.
Excessive input voltage under these
conditions can cause damage to the input
circuits on the card. Never exceed 11 volts
dc input during this procedure. The
protection normally provided by the
termination panel, which allows operation
through the full input range of 0 to 150
volts ac, is not present during this test.
Caution
The DS1 indicate on the card and the channel 1 indicator on
the calibrator labeled MUX DO/DI should both light. If they do
not, or if any other indicators do light, the discrete input card
requires repair.
Step 11: Adjust the input voltage to 4 volts dc. Both indicators should
extinguish. If they do not, the discrete input card requires
repair.
Step 12: Repeat steps 7 and 11 for input channels two through eight.
Each channel has its own corresponding data switch and
indicator. Turn off the voltage source before disconnecting
and reconnecting the voltage connections to each channel.
Step 13: Turn the voltage source and the voltmeter OFF. Disconnect
them from the breakout terminals.
Step 14: Remove the 400 ohm resistor.
Step 15: Set the calibrator ON/OFF switch to OFF.
Step 16: Disconnect the umbilical cable and remove the discrete input
card.
4.1.7 Types DM6371, DM6372, and DM6373 Pulse Count
Input Cards
All three type pulse count input cards use the same card. The calibrator
performs functional tests of the pulse count input card. There are no user
adjustments on the pulse count input cards.
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