Fluke 8508A - Page 175

Adjustment and Verification
Routine Adjustment
6
Range Zero and Gain Points
Note
For the 20MΩ range use 4 wire, for 200MΩ, 2GΩ and 20GΩ ranges use 2
wire mode on both the Calibrator and 8508A.
1. On the 8508A, press the Ω Plus key and select HiVΩ, select the required range.
2. On the Calibrator select zero and
OPR to operate the output.
Alternatively if using a standard resistor, connect the standard resistor for a resistance
zero.
3. On the 8508A press
CAL to enter the CALIBRATION menu.
4. Press
SAMPLE to initiate the adjustment operation.
Adjustment is complete when the busy legend goes out and the calibrated
measurement is displayed.
5. On the Calibrator select the range gain resistance value.
Alternatively if using a standard resistor, re-connect the standard resistor to measure
it's resistance.
6. 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 point, then press Enter.
7. Press
SAMPLE to initiate the adjustment operation.
Adjustment is complete when the busy legend goes out and the calibrated
measurement is displayed.
8. Press the Ω Plus key follwed by HiVΩ to revert to the range menu.
DC 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.
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