Fluke 125B/S Calibration Guide - Page 32

Input A and Input B AC Voltage Accuracy Test

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123B/124B/125B Calibration Manual Input A and Input B AC 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 Input B ac voltage accuracy: 1. Connect the test tool to the Calibrator. See Figure 6. 2. Setup V ac on the Test Tool: a. Push to select auto ranging (AUTO shows at the top of the display). Note For this procedure, do not press  . b. Push . c. Push  to open the MEASURE A menu. d. Select V ac. e. Push . f. Push . g. Push  to open the MEASURE B menu. h. Select V ac. i. Push . 3. If A or B is not at the center, push  to move them to the center and push  to toggle between A or B. 4. For each sensitivity value listed in Table 5: a. On the Test Tool, push  or  to set the Input A and Input B sensitivity. The range is listed in the second column. b. Set up the Calibrator: i. Supply the AC voltage (NORMAL output, WAVE sine) listed in Table 5. ii. Push . c. Compare the Test Tool reading to the limit in Table 5. Table 5. Volts AC Measurement Verification Points Sensitivity (Oscilloscope) 200 mV/div 2 V/div 20V/div Range[1] (Meter) 500 mV 5 V 50 V Calibrator Output V rms Calibrator Frequency 500 mV 500 mV 5 V 5 V 50 V 50 V 60 Hz 20 kHz 20 kHz 60 Hz 60 Hz 20 kHz Limit A-B 494.0 to 506.0 486.0 to 514.0 4.860 to 5.140 4.940 to 5.060 49.40 to 50.60 48.60 to 51.40 24

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123B/124B/125B
Calibration Manual
24
Input A and Input B AC 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 Input B ac voltage accuracy:
1.
Connect the test tool to the Calibrator. See Figure 6.
2.
Setup V ac on the Test Tool:
a.
Push
to select auto ranging (AUTO shows at the top of the display).
Note
For this procedure, do not press
.
b.
Push
.
c.
Push
to open the MEASURE A menu.
d.
Select
V ac
.
e.
Push
.
f.
Push
.
g.
Push
to open the MEASURE B menu.
h.
Select
V ac
.
i.
Push
.
3.
If A or B is not at the center, push

to move them to the center and push
to toggle between A or B.
4.
For each sensitivity value listed in Table 5:
a.
On the Test Tool, push
or
to set the Input A and Input B sensitivity.
The range is listed in the second column.
b.
Set up the Calibrator:
i.
Supply the AC voltage (NORMAL output, WAVE sine) listed in Table 5.
ii. Push
.
c.
Compare the Test Tool reading to the limit in Table 5.
Table 5. Volts AC Measurement Verification Points
Sensitivity
(Oscilloscope)
Range
[1]
(Meter)
Calibrator Output
V rms
Calibrator Frequency
Limit A-B
200 mV/div
500 mV
500 mV
60 Hz
494.0 to 506.0
500 mV
20 kHz
486.0 to 514.0
2 V/div
5 V
5 V
20 kHz
4.860 to 5.140
5 V
60 Hz
4.940 to 5.060
20V/div
50 V
50 V
60 Hz
49.40 to 50.60
50 V
20 kHz
48.60 to 51.40