HP 3400B, User'S And Service Manual

Page: 21 / 77

Chapter
2
Calibration Procedures
Calibration Interval
e'------
•
.1
•
•
•
•
•
Calibration Interval
The voltmeter should be calibrated on a regular interval determined by
the measurement ao::uracy requirements of your application. A 9O·day
interval is recommended for the most demanding applications, while a
l·year or 2·year interval may be adequate for less demanding
applications. Hewlett·Packard does not recommend extending
calibration intervals beyond 2 years for any application.
Whatever calibration interval you select, Hewlett·Packard recommends
that complete re·adjustment should always be performed at the
calibration interval. This will increase your confidence that the
HP 3400B will remain within specification for the next calibration
interval. This criteria for re.adjustment provides the best measure of
the voltmeter's long·term stability. Performance data measured using
this method can easily be used to extend future calibration intervals.
When your voltmeter is due for calibration, contact your local
Hewlett·Packard Service Center for a low·cost recalibration.
Calibrations to MIL-STD·45662
are
also available at competitive prices.
Time Required for Calibration
The Operation Verification, Performance Verification, and Adjustment
procedures in this chapter show you how to manually calibrate the
voltmeter. A complete verification and adjustment using these
procedures will take approximately one hour.
19
2