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7.4 Preamp Zero Adjust (R9)
The preamp zero has been adjusted at the factory and should not require
adjustment unless it has been adjusted by mistake. If necessary, use the
following adjustment procedures:
1. For output ranges V01 and I01, apply a signal to the input which displays zero
on the selected display range (4 LSD OR 4 MSD). Jumper TB4-1 to TB4-3
and adjust R9 for zero output on the voltmeter or ammeter. Proceed to
Section 7.1 or 7.2 .
2. For output range I02, you must add S1-E push-on jumper before performing
step 1 above. After completing step 1, you must remove S1-E before
proceeding to Section 7.3.
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