Technical data

18 U2741A USB Modular 5.5 Digits Digital Multimeter Service Guide
2 Performance Test Calibration
Gain verification
This test checks the full- scale reading accuracy of the
instrument. Verification checks are performed only for those
functions and ranges with unique gain calibration constants.
DC voltage gain verification test
DC voltage configuration:
(CONFigure[:VOLTage][:DC] [<range|MIN|MAX|AUTO>
[,resolution|MIN|MAX|DEF>]])
1 Connect the calibrator to the front panel HI and LO input
terminals.
2 Select each function and range based on the input voltage
as shown in Table 2- 3.
3 Make a measurement and observe the result. Compare the
measurement results with the appropriate test limits as
shown in Table 2- 3. (Be certain to allow for appropriate
source settling when using the Fluke 5520A.)
[1]
Select NPLC 20 digit resolution.
Q = Quick performance verification test points
Table 2 - 3 DC voltage gain verification
Input Function
[1]
Range Quick check Error from nominal
1 year
100 mV
DC Voltage
100 mV ±23 µV
–100 mV 100 mV ±23 µV
1 V 1 V Q ±0.2 mV
–1 V 1 V ±0.2 mV
10 V 10 V ±2.3 mV
100 V 100 V Q ±23 mV
300 V 300 V ±69 mV