Calibration Procedures
1
Keysight U1241C/U1242C Service Guide
47
Vsense (non-contact voltage) calibration
1
Turn the rotary switch to the
position with
shown on the display.
2
Connect a dual open type banana plug into the output voltage terminals of the
calibrator.
3
Ensure the “EARTH” button of the calibrator is turned ON.
4
Ensure the top of the multimeter is vertically and horizontally centered to
contact the banana plug's Hi terminal.
5
Set the source output to 10 V/55 Hz.
6
Press
to start the calibration. If the calibration is successful,
will be displayed.
DC A
Open
oPEn
Open terminals
10.000 A
10.000 A
0.7 to 1.3 x Reference value
AC A
10.000 A
1.000 A (55 Hz)
0.7 to 1.3 x Reference value
10.000 A (55 Hz)
0.7 to 1.3 x Reference value
[a] The sensor for the Vsense (non-contact voltage) calibration is located at the top center of the multimeter. Place the top area as close as
possible to the standard signal source without any loads.
[b] — Set the 5520A to internal reference.
— Prior to performing adjustment, connect one end of the K-type thermocouple (with miniature TC connector on both ends) to the 5520A TC
output, and the other end to a precision thermometer to verify that the source outputs the desired value. Adjust the source accordingly if
necessary.
— To perform the adjustment, connect one end of the K-type thermocouple (with miniature TC connector on both ends) to the 5520A TC
output, and the other end to the multimeter via a TC-to-banana adapter. Allow at least 1 hour for the multimeter to stabilize.
Table 1-15
Adjustment input values (continued)
Test function
Step
Reference value
Valid reference input
NOTE
– Keep the multimeter away from fluorescent lights, dimmable lights, motors,
and other electrical noise sources when running the tests. These electrical
noise sources can invalidate the calibration.
– It may be necessary in
and
below to slightly adjust the position
of the multimeter for maximum signal strength.
V
Hold
Log