Technical data

Performance Test Calibration 2
U2741A USB Modular 5.5 Digits Digital Multimeter Service Guide 15
If the instrument fails the quick performance check,
adjustment or repair is required.
Adjustment is recommended at every calibration interval. If
adjustment is not made, you must establish a 'guard band',
using no more than 80% of the specifications, as the
verification limits.
NOTE
Make sure you have read “Test Considerations” on page 12 before doing
the performance verification tests.