Performance Verification Tests; Zero Offset Verification; Table 2-2 Zero Offset Verification Test - Agilent Technologies U2741A USB Service Manual

2 Performance Test Calibration

Performance Verification Tests

Zero offset verification

NOTE

Table 2-2 Zero offset verification test

Input
Open
Open
Open
Open
16
This test is used to check the zero offset performance of the
instrument. Verification checks are only performed for those
functions and ranges with unique offset calibration
constants. Measurements are checked for each function and
range as described in the procedure on the next page.
Zero offset verification test
1 Connect the Shorting Plug to the voltage HI and LO input
terminals. (see
current inputs open.
2 Select each function and range in the order shown in the
table below. Make a measurement and observe the result.
Compare the measurement results to the appropriate test
limits shown in
Note that resistance measurements use the Null math function (Null
reading taken with test leads connected together) to eliminate test lead
resistance.
[1]
Function Range
10 mA
100 mA
DC Current
1 A
2 A
U2741A USB Modular 5.5 Digits Digital Multimeter Service Guide
"Input connections"
Table 2- 2.
Quick check
Q
on page 13). Leave the
Error from nominal
1 year
±1.5 µA
±5 µA
±70 µA
±140 µA