Fluke 5790B - Page 63

Calibration Adjustment and Verification
Calibration 3
3-25
60 mV
20 mV
6 mV
2 mV
0.6 mV
2.2 mV
RANGE
22 mV
RANGE
70 mV
RANGE
7 mV
RANGE
elu033.eps
Figure 3-9. Millivolt Range Bootstrapping Technique
5790B
792A
100:1
Resistive
Divider
50 Ω
B
elu072.eps
Figure 3-10. mV Range Linearity Setup for Bootstrap Ranges
a. Calibrate the 22 mV range as follows:
1) Lock the Product in the 70 mV range. The 792A may be
left attached, although it is not used.
2) Apply the requested voltage and frequency. When the
reading on the Product Measurement Display settles,
record the reading. Correct the measurement for linearity
error as measured using the 100:1 divider.
3) Push the Continue softkey. This automatically selects the
22 mV range.
4) Enter the value you recorded in step 2 and push the
ENTER softkey.