46 34980A Service Guide
3 Calibration Procedures
Calibration Procedures
This manual contains procedures for verification of the instrument’s performance and
adjustment (calibration).
Closed-Case Electronic Calibration The instrument features closed-case
electronic calibration. No internal mechanical adjustments are required. The instrument
calculates correction factors based upon the input reference value you set. The new
correction factors are stored in non-volatile memory until the next calibration adjustment
is performed. Non-volatile EEPROM calibration memory does not change when power
has been off or after a remote interface reset.
Agilent Technologies Calibration Services
Agilent Technologies offers calibration services at competitive prices.
When your instrument is due for calibration, contact your local Agilent Service Center
for recalibration. See “Types of Service Available" on page 6 for information on
contacting Agilent.
Calibration Interval
The instrument should be calibrated on a regular interval determined by the
measurement accuracy requirements of your application.
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.
Whatever calibration interval you select, Agilent recommends that complete
re-adjustment should always be performed at the calibration interval. This will assure
that the 34980A will remain within specification for the next calibration interval. This
criteria for re-adjustment provides the best long-term stability.
Performance data measured during Performance Verification Tests does not guarantee
the instrument will remain within these limits unless the adjustments are performed.
Use the Calibration Count feature (see page 50) to verify that all adjustments have been
performed.
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