5500A
Service Manual
3-24
Table 3-16. Resistance Accuracy Test (cont.)
Nominal Value Measured Value (Ohms) Deviation % 90-Day Spec. (mΩ or %)
300 kΩ 0.011%
330 kΩ 0.028%
1.09 MΩ 0.016%
1.19 MΩ 0.016%
1.9 MΩ 0.014%
3 MΩ 0.013%
3.3 MΩ 0.062%
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] Perform this test 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. Figure 3-4
shows the connections and the equation you use to calculate actual resistance.
3-31. Resistance DC Offset Measurement
The Resistance DC Offset Measurement test checks the dc offset of the amplifiers used
in synthesizing resistance. Prior to performing this test, make sure you zero the 5500A
Calibrator following the “Zeroing the Calibrator” procedure described earlier in this
chapter. Set the output to 100 ohms, COMP OFF, and measure the NORMAL terminals
with a dc millivoltmeter. Table 3-17 shows the test point.
Table 3-17. Resistance DC Offset Measurement Test
Range Nominal Value Measured Value (V)
(NORMAL)
Deviation % 8-Hour Spec.
100 Ω 0.000 mV 0.010 mV
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