Fluke 125B/S Calibration Guide - Page 30

Input A and Input B DC Voltage Accuracy Test

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123B/124B/125B Calibration Manual Input A and Input B DC Voltage Accuracy Test XW Warning To prevent possible electrical shock, fire, or personal injury, make sure that the calibrator is in standby mode before making any connection between the calibrator and the test tool. Dangerous voltages will be present on the calibration source and connecting cables during the following steps. To test the Input A and B voltage accuracy: 1. Connect the test tool to the Calibrator. See Figure 6. A B 5522A CALIBRATOR BB120 BNC PM9091/001 (1.5 m) PM9092/001 (0.5 m) PM9081 PM9093 Figure 6. Test Tool Input A-B to Calibrator Normal Output 2. Setup V dc on the Test Tool: a. Push . b. Push . c. Push  to open the MEASURE A menu. d. Select V dc. e. Push . f. Push . g. Push  to open the MEASURE B menu. h. Select V dc. i. Push . 3. Use  to change the time base to select manual time base ranging and lock the time base on 10 ms/div. 4. Move the Input A and Input B ground level to the center grid line. 5. Push  to toggle between Move A and Move B. If A or B is not at the center, use  to move them to the center. 6. Set up the input settings on the Test Tool: a. Push . b. Push  to open the INPUT SETTINGS A menu. c. Make these selections: • Select Coupling: DC • Readings: Smooth • Noise filter: ON. 22

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123B/124B/125B
Calibration Manual
22
Input A and Input B DC Voltage Accuracy Test
XW
Warning
To prevent possible electrical shock, fire, or personal injury, make sure that
the calibrator is in standby mode before making any connection between
the calibrator and the test tool. Dangerous voltages will be present on the
calibration source and connecting cables during the following steps.
To test the Input A and B voltage accuracy:
1.
Connect the test tool to the Calibrator. See Figure 6.
Figure 6. Test Tool Input A-B to Calibrator Normal Output
2.
Setup V dc on the Test Tool:
a.
Push
.
b.
Push
.
c.
Push
to open the MEASURE A menu.
d.
Select
V dc
.
e.
Push
.
f.
Push
.
g.
Push
to open the MEASURE B menu.
h.
Select
V dc
.
i.
Push
.
3.
Use
to change the time base to select manual time base ranging and lock the time base on 10 ms/div.
4.
Move the Input A and Input B ground level to the center grid line.
5.
Push
to toggle between
Move A
and
Move B
. If A or B is not at the center, use

to move them to the
center.
6.
Set up the input settings on the Test Tool:
a.
Push
.
b.
Push
to open the INPUT SETTINGS A menu.
c.
Make these selections:
•
Select Coupling:
DC
• Readings:
Smooth
•
Noise filter:
ON
.
5522A
CALIBRATOR
A
B
PM9081
PM9093
PM9091/001 (1.5 m)
PM9092/001 (0.5 m)
BB120
BNC