Fluke 5720A service manual Wideband Output Accuracy at 1 kHz Test

Calibration and Verification 3

Wideband Output Accuracy at 1 kHz Test

Table 3-11. Equipment Required for Testing and Calibrating the Wideband Option

Equipment

AC Measurement Standard Wideband cable

50Ω Termination

Adapter

Adapter

Model or Description

Fluke 5790A with Wideband Option -03 Supplied with 5700A-03

Supplied with 5700A-03

Pomona 1269 BNC(F) to dual banana plug. Kings KN-99-46 N(F) to BNC(M)

3-28. Wideband Output Accuracy at 1 kHz Test

This test verifies the Wideband output level at 1 kHz by direct measurement with the 5790A at INPUT 2. Use Table 3-31 for a test record.

Proceed as follows to characterize the rms wideband voltmeter at 1 kHz:

1. Connect the equipment as shown in Figure 3-16.

Calibrator (UUT)

Wideband

Output

BNC(F) to Banana Adapter

Wideband

Output Cable

50Ω Termination N(F) to BNC(M) Adapter

5790A

Input 2

F3-12.EPS

Figure 3-16. Wideband Accuracy at 1 kHz Test Setup

2.Set the Calibrator wideband output to 2.1V at 1 kHz and the 5790A to read INPUT 2.

3.Push the 2.2V RANGE button on the 5790A to lock it on the 2.2V range.

4.On the 5790A push UTIL MENUS button and then MEAS CONTROL soft key. Set the digital filter mode to FAST and the restart to MEDIUM. Push the DONE soft key twice to return to the measurement display.

5.Use the Calibrator output adjustment knob to obtain a reading on the 5790A measurement display of 2.100000 ±20 counts.

6.Read the error on the Calibrator display and record it in Table 3-32 for the 2.1V level for the appropriate verification internal. Verify that it is within spec limits shown.

7.Push the soft key under the RANGE display on the 5790A to return to AUTO RANGE.

8.Proceed to the remaining levels shown in Table 3-32 and repeat steps 5 through 7 with the appropriate output levels set in each step, using the adjustment tolerance in Table 3-12 in step 5.

3-39