413 Alternate Ohms Calibration Front Panel

The following procedure can be used with discrete resistor values (such as a decade box). On the 300 W range, this alternate procedure uses a 290 W source and yields a specification of 0.05%+2 digits +0.02 W. Alternate calibration of this range is detailed below, although discrete resistor values can be used for all ranges. Lead and source zero resistances are only taken into account for the lowest two ranges (300 W and 3 kW).

1. Connect the ohms source to the meter. Apply zero ohms.

2. Measure and record the residual lead and source zero resistance on the 300W range.

3. Add the value from the lead and source zero resistance from step 2 above to the certified value of the source resistor.

4. Set the meter to the calibration mode (press the Cal Enable button.) Select ohms calibration.

5. Using the editor buttons, edit the meter display prompt to the value calculated in step 3.

6. Press (auto) to calibrate this range.

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