Fluke 123B/S Service Manual - Page 78

Input A and B High Voltage AC/DC Accuracy Test

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123/124 Service Manual 4.5.14 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 4-6. Figure 4-6. Test Tool Input A-B to 5500A Normal Output for >300V ST8129.WMF 2. Select the following test tool setup: • Press to select auto ranging (AUTO in top of display). Do not press anymore! • Press to open the INPUT A MEASUREMENTS menu, and choose: MEASURE on A: I VAC • Press to open the INPUT A MEASUREMENTS menu, and choose: MEASURE on A: I VDC (VDC becomes main reading, VAC secondary reading) • Press to open the INPUT B MEASUREMENTS menu, and choose: INPUT B: I ON | MEASURE on B: I VAC • Press to open the INPUT B MEASUREMENTS menu, and choose: INPUT B: I ON | MEASURE on B: I VDC • Move the Input A and Input B ground level (indicated by zero icon ) to the center grid line. Proceed as follows: Press to enable the arrow keys for moving the Input A ground level. Press to enable the arrow keys for moving the Input B ground level. Using the keys move the ground level. 4-20

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123/124
Service Manual
4-20
4.5.14 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 4-6.
ST8129.WMF
Figure 4-6. Test Tool Input A-B to 5500A Normal Output for >300V
2.
Select the following test tool setup:
•
Press
to select auto ranging (
AUTO
in top of display).
Do not press
anymore!
•
Press
to open the INPUT A MEASUREMENTS menu, and choose:
MEASURE on A:
■
VAC
•
Press
to open the INPUT A MEASUREMENTS menu, and choose:
MEASURE on A:
■
VDC
(VDC becomes main reading, VAC secondary reading)
•
Press
to open the INPUT B MEASUREMENTS menu, and choose:
INPUT B:
■
ON | MEASURE on B:
■
VAC
•
Press
to open the INPUT B MEASUREMENTS menu, and choose:
INPUT B:
■
ON | MEASURE on B:
■
VDC
•
Move the Input A and Input B ground level (indicated by zero icon
) to the
center grid line. Proceed as follows:
Press
to enable the arrow keys for moving the Input A ground level.
Press
to enable the arrow keys for moving the Input B ground level.
Using the
keys move the ground level.