Fluke 5500A - Resistance DC Offset Measurement

Maintenance
Performing a Calibration Check
7
7-11
Resistance Accuracy (cont)
Nominal Value (Ω) Measured Value (Ω) Deviation % 90-Day Spec. (mΩ or %)
10.9 MΩ 0.050%
11.9 MΩ 0.080%
19 MΩ 0.078%
30 MΩ 0.077%
33 MΩ 0.415%
109 MΩ 0.406%
119 MΩ 0.413%
290 MΩ [1] 0.403%
[1] This test can be performed using the HP 3458A in the 10 MΩ range and the Fluke 742A-10M in
parallel with the 5500A output. Using exactly 10 MΩ, the nominal value is 9.66667 MΩ.
7-11. Resistance DC Offset Measurement
Note
This verification test is optional. It is not necessary to guarantee the full
calibration of the instrument. However, it may be useful when
troubleshooting an instrument when other functions and/or parameters are
incorrect.
The Resistance DC Offset Measurement test checks the dc offset of the amplifiers used
in the Synthesized resistance. Prior to performing this test, make sure you zero the
5500A Calibrator following the “Zeroing the Calibrator” procedure in Chapter 4. Set the
output to 100 Ω, COMP OFF, and measure the NORMAL terminals with a dc meter (see
Table 7-2).
Range Nominal Value Measured Value (V) Deviation % 8-Hour Spec.
100 Ω 0.000 mV 0.010 mV