Optimizing Use Of The 5450A; Remote Calibration - Fluke 8842A Instruction Manual

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8842A
Instruction Manual
4. Select the "100 " output from the 5450A, and measure this value as in step 3.
5. Find and record the numerical difference between the values calculated in steps 3 and
6. Repeat steps 4 and 5 using the "1 k " output from the 5450A; find and record the
7. Press the UUT's 2 WIRE k button. This selects the Offset and Gain calibration
8. Select the "100 " output from the 5450A and calibrate the high point for the 200
9. Select the "1 k " output from the 5450A and calibrate the high point for the 2 k
10. Calibrate the remaining ranges (steps D-G of Table 6-10) using the 5450A outputs.
11. Recalibrate the low point for each 2-wire ohms range using a shorting link (Pomona
12. Exit the calibration mode by pressing the CAL ENABLE switch.
13. Using the same configuration shown in Figure 6-4, verify that the UUT measures the
Only 4-wire ohm calibration is allowed in the 20 range.
14. Cover the CAL ENABLE switch with a calibration certification sticker.

6-23. Remote Calibration

If the IEEE-488 Interface is installed, the 8842A can be calibrated under remote control.
Remote calibration is very similar to local (front-panel controlled) calibration. Table 6-14
shows the remote commands which correspond to the front panel features.To facilitate
remote calibration, there are some differences from local calibration:
6-20
readings. (In remote calibration, the averaged value can be stored in the controller.)
Record the value.
4. This value will be used as the variable input for calibrating the 200 range in 2-
wire ohms.
numerical difference between this and the "SHORT" measured in step 3. This value
will be used as the variable input for calibrating the 2 k range in 2-wire ohms.
procedure for the 2-wire ohms function and prompts for zero input. Select the
"SHORT" from the 5450A, and calibrate all the zeros by pressing STORE.
range, entering the value computed in step 5 as a variable input.
range, entering the value computed in step 6 as a variable input.
MDP-S-0 or equivalent) across the UUT's HI and LO INPUT terminals.
same value (within 1 digit) in 2-wire ohms (using the offset feature to correct for
5450A floor error) as in 4-wire ohms. If the readings differ by more than 1 digit,
reenable the calibration mode and repeat steps 2 through 8.
Figure 6-4. Optimizing Use of the 5450A
NOTE
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