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Performance Tests and Calibration 7
Agilent U1251A/U1252A User’s and Service Guide 113
Calibration interval
A 1-year interval is adequate for most applications. Accuracy
specifications are warranted only if adjustment is made at
regular calibration intervals. Accuracy specifications are not
warranted beyond the 1- year calibration interval. Agilent
does not recommend extending calibration intervals beyond
2 years for any application.
Adjustment is recommended
Specifications are only guaranteed within the period stated
from the last adjustment. Agilent recommends that
readjustment should be performed during the calibration
process for best performance. This will ensure that the
U1251A/U1252A will remain within the specifications for the
next calibration interval. This criterion for the re- adjustment
provides the best long–term stability.
Performance data are measured during the Performance
Verification Tests but this does not guarantee that the
instrument will remain within these limits unless the
adjustments are performed.
Refer to the section “To read the calibration count” on
page 142 and verify that all the adjustments have been
performed.