Fluke 5720A AC Current Test, 2 mA and 200 μA Ranges, Hi Output Lo, Pomona Cable 1362-A-18

5700A/5720A Series II Calibrator

Service Manual

3-24. AC Current Test, 2 mA and 200 μA Ranges

The equipment required for the alternating current accuracy verification test for the 2 mA and 200 μA 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 μA

Ranges

Equipment

AC Measurement Standard

Metal Film Resistor

Metal Film Resistor

Cable

Model or Description

Fluke 5790A

200Ω, 1/8w, ±1%, T9 (P/N 309724) mounted on a dual banana plug. 2 kΩ, 1/8w, ±1%, T9 (PN 335422) mounted on a dual banana plug Pomona 1368-A-18. Double banana to single banana plugs.

1. Connect the equipment as shown in Figure 3-13.

Calibrator (UUT)

Hi

Output

Lo

Metal Film Resistor

Mounted on Dual

Banana Plug

200

Ω

Pomona Cable

1362-A-18

5790A

Hi

Input 2

Lo

F3-9.EPS

Figure 3-13. Alternating Current Test Setup 2 mA and 200 μA

Note

An explanation of the rationale for using metal film resistors to measure ac current follows this procedure.

2.Set the Calibrator for precisely +2 mA dc using the correction from previously recorded data, i.e. set the Calibrator error display to the value recorded for +2 mA dc (Table 3-9 or 3-11).

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 recorded data, i.e., set the Calibrator error display to the value recorded for -2 mA dc, in Table 3-10.

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 within spec.

8.Return to the error corrected +2 mA DC output that was set in step 2. Verify that the 5790A display returns to a zero reading ±10 PPM. If necessary, repeat steps 2 through 6 until the required results are obtained.

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