8508A
Users Manual
Initial Setup
1. On the 8508A, press the
CAL key.
2. Press the DCI key. Press
CONFIG key and deselect Filt.
Press the DCI key, select 200 µA range.
3. In calibration mode the resolution defaults to
RESL7 in the DCI function. It is
recommended that this resolution is used for adjustment of all DCI ranges.
4. Confirm that the 8508A is configured for internal guard (External Guard is
deselected) by checking that the
ExGd legend does not appear on the left-hand
display.
5. Ensure that the calibrator output is set to
STANDBY and configured for Internal
Guard (
EX GRD is deselected).
6. Connect the Calibrator to the 8508A as shown in Figure 6-1.
Range Zero and Gain Adjustment Procedure
After the initial setup and connecting up, use the following procedure to adjust range
zero, then positive and negative range gains on all DCI ranges. Just one range can be
adjusted if required, but for a full adjustment start with the 200 µA range and work up to
the 20A range, as shown in Table 6-6.
6-28
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