Fluke 124B/S Service Manual - Page 52

Input A and B High Voltage AC/DC Accuracy Test

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Fluke 123/124/125 Service Manual 1. Connect the test tool to the 5500A as for the previous test (see Figure 3-5). 2. Press to open MENU. 3. Operate the keys to highlight HARMONICS. 4. Press to open the B AMPERE PROBE menu, and choose: SENSITIVITY: 10 mV/A 5. Press to open the HARMONICS AMP menu. 6. Set the 5500A to source a square wave 2.5 Vpp, 60 Hz (NORMAL output, WAVE square). Set the 5500A to Operate (OPR). 7. Check if the bargraphs of AMP HARMONICS look like the the ones in Figure 3-6. 8. Press to two times to activate HARMONICS VOLT menu. 9. Check if the bargraphs of VOLT HARMONICS look like the the ones in Figure 3-7. 10. When you are finished, set the 5500A to Standby. Figure 3-6. Bargraph Harmonics Ampere Figure 3-7. Bargraph Harmonics Volt 3.5.15 Input A and B High Voltage AC/DC Accuracy Test Warning Dangerous voltages will be present on the calibration source and connecting cables during the following steps. Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool. Proceed as follows to test the Input A&B High Voltage AC and DC Accuracy: 1. Connect the test tool to the 5500A as shown in Figure 3-8. 3-22

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Fluke 123/124/125
Service Manual
3-22
1.
Connect the test tool to the 5500A as for the previous test (see Figure 3-5).
2.
Press
to open MENU.
3.
Operate the
keys to highlight HARMONICS.
4.
Press
to open the B AMPERE PROBE menu, and choose:
SENSITIVITY:
10 mV/A
5.
Press
to open the HARMONICS AMP menu.
6.
Set the 5500A to source a square wave 2.5 Vpp, 60 Hz (NORMAL output, WAVE
square). Set the 5500A to Operate (OPR).
7.
Check if the bargraphs of AMP HARMONICS look like the the ones in Figure 3-6.
8.
Press
to two times to activate HARMONICS VOLT menu.
9.
Check if the bargraphs of VOLT HARMONICS look like the the ones in Figure 3-7.
10.
When you are finished, set the 5500A to Standby.
Figure 3-6. Bargraph Harmonics Ampere
Figure 3-7. Bargraph Harmonics Volt
3.5.15 Input A and B High Voltage AC/DC Accuracy Test
Warning
Dangerous voltages will be present on the calibration source and
connecting cables during the following steps.
Ensure that the
calibrator is in standby mode before making any connection
between the calibrator and the test tool.
Proceed as follows to test the Input A&B High Voltage AC and DC Accuracy:
1.
Connect the test tool to the 5500A as shown in Figure 3-8.