Section 7
7-13
7.2.4.2. Initial Checks
1. Set the Power Entry Module for 120 V operation (or set to local line power
conditions as described in Section 3.1).
2. Install correct fuse in the Power Entry Module 2 A, 250 V time delay fuse
(MDL2).
3. Turn the 6675A Power Switch to the ON (1) position.
4. Ensure that there is NO loud hum from any of the transformers and that the
ventilation fan at the rear of the unit is exhausting air OUT of the 6675A.
5. Verify that the front panel display illuminates and no error message is
displayed after initialisation is complete (after approximately 15 seconds)
6. Turn the 6675A power OFF.
7.2.4.3. Primary Current Drive Adjustments (Board 19108)
7.2.4.3.1.Primary Current Calibration
1. Link Rs C
1
to Rs P
1
. Link Rs P
2
to Rs C
2
.
2. Connect a 10 0.01% GR resistor across Rs P
1
and Rs P
2
.
3. Link Rx C
1
to Rx P
1
. Link Rx P
2
to Rx C
2
.
4. Connect a 10 0.01% resistor across Rx P
1
and Rx P
2
.
5. Using a DMM, monitor the DC voltage at Rx P
2
with respect to Rx
P
1
(use the 2 V range on the DMM).
6. Turn the 6675A Power ON.
7. After initialization, the "Measure/Setup/Voltmeter/Sofcal " menu
should appear on the 6675A display.
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