8508A
Users Manual
6. On the Calibrator, select the positive Range Gain point Output value.
7. If the Set feature is being used:
On the 8508A, select Set on the
CALIBRATION Menu.
Use the numeric keys with the
SET VALUE menu to enter the true output value of the
calibrator at the range gain value, then press Enter.
8. Press
SAMPLE to initiate the adjustment operation.
Adjustment is complete when the busy legend goes out and the calibrated
measurement is displayed.
9. On the Calibrator, select the negative Range Gain point Output value.
10. If the Set feature is being used:
On the 8508A, select Set on the
CALIBRATION Menu.
Use the numeric keys with the
SET VALUE menu to enter the true output value of the
calibrator at the range gain value, then press Enter.
11. Press
SAMPLE to initiate the adjustment operation.
Adjustment is complete when the busy legend goes out and the calibrated
measurement is displayed.
12. On the Calibrator, deselect
LOCKED to allow the Calibrator to Auto range.
Set zero output and select STBY to put the Calibrator output into Standby.
13. On the 8508A, select
DCI to revert to the range menu.
AC Current Adjustment
Warning
The Calibrator can deliver a lethal electric shock.
To avoid electric shock when performing the following adjustment
procedures:
• Never touch any lead or terminal unless you are absolutely certain
that no dangerous voltage is present.
• Make sure that signal leads are in a safe condition before you
handle them in any way.
Initial Setup and Connections
1. Press the ACI key, and select the
200µA range.
2. In calibration mode in the ACI function resolution defaults to
RESL6 and the 100Hz
RMS filter is automatically selected. It is recommended that this resolution and 40Hz
Filter is used for adjustment of all ACI ranges.
3. 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.
4. Ensure that the calibrator output is set to
STANDBY and configured for Internal
Guard (
EX GRD is deselected).
5. Connect the Calibrator to the 8508A as shown in Figure 6-1.
6-30
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