Ac Current Test, 2 Ma And 200 A Ranges - Fluke 5700A Series II Service Manual

5700A/5720A Series II Calibrator
Service Manual

3-21. AC Current Test, 2 mA and 200 A Ranges

The equipment required for the alternating current accuracy verification test for the 2 mA
and 200 A ranges is listed in Table 3-10. Use Table 3-28 (5720A) or 3-29 (5700A0 for
the test record.
Table 3-10. Equipment Required for Alternating Current Accuracy Test for the 2 mA and 200 A
Equipment
AC Measurement Standard
Metal Film Resistor
Metal Film Resistor
Cable
1. Connect the equipment as shown in Figure 3-11.
Calibrator (UUT)
2. Set the Calibrator for precisely +2 mA dc using the correction from previously
3. When the 5790A settles on a reading, push the SET REF soft key on the 5790A.
4. Set the Calibrator for precisely -2 mA dc output using the correction from previously
5. Press the AVG REF soft key on the 5790A after the 5790A reading settles.
6. Set the Calibrator to 2 mA at 10 Hz and OPERATE.
7. Record the error displayed on the 5790A in Table 3-28 or 3-29, and verify results are
8. Return to the error corrected +2 mA DC output that was set in step 2. Verify that the
3-34
Fluke 5790A
200 , 1/8w, 1%, T9 (P/N 309724) mounted on a dual banana plug.
2 k , 1/8w, 1%, T9 (PN 335422) mounted on a dual banana plug
Pomona 1368-A-18. Double banana to single banana plugs.
Hi
200
Output
Lo
Figure 3-11. Alternating Current Test Setup 2 mA and 200 A
An explanation of the rationale for using metal film resistors to measure
ac current follows this procedure.
recorded data, i.e. set the Calibrator error display to the value recorded for +2 mA dc
(Table 3-9 or 3-11).
recorded data, i.e., set the Calibrator error display to the value recorded for -2 mA dc,
in Table 3-10.
within spec.
5790A display returns to a zero reading ±10 PPM. If necessary, repeat steps 2
through 6 until the required results are obtained.
Ranges
Model or Description
Metal Film Resistor
Mounted on Dual
Banana Plug
Pomona Cable
1362-A-18
Note
5790A
Hi
Input 2
Lo
F3-9.EPS