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section V
WARNING
To prevent shock hazard, turn off
the instrument and disconnect it
from AC line power and all test
equipment before changing the
line voltage selection.
Model
DRC-93c
2.
Test Connector
-
fabricated per
Complete
the
following
set-up
procedure for this test:
1 .
Plug the connector into INPUT A.
2.
Connect the DVM across the test
Section 5.5.1.
1 .
Pull
fuse
compartment
cover
resistor of Input A.
using
the procedure
found in
Section
5.3.
3.
Connect
the
DRC-93C
to
line
power and turn the unit ON.
2.
Remove voltage selector wheel
Verify that the DRC-93C initial-
and insert with the proper vol-
izes
to
the
proper
POWER-ON
tage facing out.
Note that the
state as defined in Section 3.7.
wheel can only be inserted with
the writing read from the left.
The following procedure is used to
test the overall DRC-93C operation.
lined in Section 5.3.
Note:
The unit should be allowed a
one-hour warm-up time to achieve
3.
Install the proper fuse as out-
5 . 5
OPERATIONAL
CHECKS
rated specifications.
5 . 5 . 1
Test Connector
5 . 5 . 3
Current
source
Check
A
test connector for the rear panel
The DVM across the test resistor
J1
INPUT A or J2 INPUT B connector
should read as follows:
to simulate a diode sensor input is
required for operational checks of
9210/20-3
1.0000V
±
100µV
the DRC-93C.
The test connector
9210/20-6
1.0000V
±
100µV
configuring a resistor to simulate
9220-R1
0.03000V
±
10µV
Section
2.3.6.
The test resistors
specified in Table
5-1
are used in
5 . 5 . 4
Monitor Voltage
the operational checks.
The voltage across the sensor or
5 . 5 . 2
Operational
T e s t
procedure
test resistor is also available on
the monitor plug.
The connections
The operational test procedure is
are given
in
Section II of this
designed
to
verify
the
overall
manual.
The monitor voltage will
operation of the DRC-93C and can be
be equal to the sensor voltage for
used
as
a
periodic
maintenance
3
volt (-3) diode inputs and all
check.
The following equipment is
platinum
(-P2, -P3) and
rhodium
used in the test.
iron (-R1) inputs.
If the input is
a GaAlAs Diode (-6) input then the
1 .
Digital Voltmeter
-
4½ digit
monitor voltage will be 0.458 times
resolution or better.
the sensor voltage.
This test is
not applicable for the 9215, 9305,
9317C or 9318C input cards.
can be made by taking one of the
9220-P2
0.10000v
±
10µV
plugs supplied with the DRC-93C and
9220-P3
0.10000v
±
10µV
the temperature sensor in the two
9317C
N/A
wire configuration as described in
9318C
N/A
5-2
COPYRIGHT
3/88 LSCI
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