Agilent Technologies U1602A User's And Service Manual page 157

Performance Tests 7
Performance Test Interval
The performance testing described in this section may be performed for
incoming inspection and should be performed periodically to verify that
the oscilloscope is operating within specification. The recommended test
interval is once per year or after 2000 hours of operation. Performance
should also be tested after repairs or major upgrades.
Performance Test Record
A test record form is provided in "Agilent U1602A/U1604A Handheld
Digital Oscilloscope Test Record 179". This record lists performance
tests, test limits and columns to record test results.
Warming Up Before Testing
For accurate test results, let the instrument and test equipment warm up
for 30 minutes before testing.
If performance test fails, perform self-calibration documented in User → Utility → Page 3/4
N O TE
→ Self-Cal. If the performance tests remain failing after the Self-Cal, send the instrument to
your nearest Agilent Technologies Service Center for servicing.
Agilent U1602A/U1604A User's and Service Guide 157