Fluke 5790A, Operator'S Manual

Page: 219 / 220

Appendices
5200A Verification and Calibration
E
E-9
Use the following procedure to perform the millivolt range output accuracy test:
1. Connect the equipment as shown in Figure F-3.
2. Set the 5200A output to 100 mV on the 100-mV range and 1 MHz on the 1-MHz
range.
3. Set the MODE switch to OPER.
Note
Internal Sensing is automatic on the 5200A millivolt ranges.
4. Adjust the 100-mV HIGH FREQ (L1, Attenuator PCB) if necessary to give a
5790A reading of 100.0800 mV
±
0.0020 mV.
Note
The output at 1 MHz is purposely adjusted 0.08 % high in order to
compensate for the input capacity of the 5790A.
5. Connect the equipment as shown in Figure F-4.
6. Set the 5200A output to 10 mV on the 10-mV range and 1 MHz on the 1-MHz range.
7. Set the MODE switch to OPER.
8. Adjust the 10-mV HIGH FREQ (R12, Attenuator PCB) if necessary to give a
reading of 10.0000
±
0.0005 mV.
9. Connect the equipment as shown in Figure F-5.
10. Set the 5200A output to 1 mV on the 1-mV range and 1 MHz on the 1-MHz range.
11. Adjust the 1-mV High Freq (R11, Attenuator PCB) if necessary to give a reading of
1.0000
±
0.0010 mV.
Error Control Calibration
Use the following procedure for the error control calibration:
1. Connect the equipment as shown in Figure F-2. Ensuring that both covers are
installed and secured.
2. Set the 5200A output to 10V on the 100-mV range and 1 MHz on the 1-MHz range.
3. Set the MODE switch to OPER.
4. Push the SET REF soft key on the 5790A.
5. Set the VERNIER dial to 0.00 and the VOLTAGE ERROR-% switch to X1.
6. Adjust Error Control Zero (R75, Reference PCB) if necessary to get an error display
on the 5790A of 0.0
±
50 ppm.
7. Check the adjustment by rotating the VOLTAGE ERROR-% switch between X1 and
OFF positions. The 5790A error display should remain at 0.0
±
50 ppm.
Note
The toroid and blocking capacitor adapter are required during calibration
ONLY, due to equipment characteristics. During normal use the 100-mV
range is specified at the end of the 12-inch RG-58A/U cable. The 10-mV
and 1-mV ranges are specified at the end of the 3-foot RG-58A/U cable.
The 1V, 10V, and 100V ranges are specified with 1 foot output and sense
RG-58A/U coax and with EXT SENSE.