Agilent Technologies L4400 Calibration Procedures, Agilent Technologies Calibration Services

AL4451A and L4452A Calibration Procedures

Calibration Procedures

This section contains performance verification and adjustment (calibration) procedures for the L4400 Series L4451A 4- Channel Isolated D/A Converter and L4452A Multifunction Module.

Closed-Case Electronic Calibration These instruments feature closed- case electronic calibration. No internal mechanical adjustments are required. The instruments calculate correction factors based upon the readings from a separate DMM sent to the instruments during the calibration procedure. 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

When your instruments are due for calibration, contact your local Agilent Service Center for low- cost recalibration. The L4451A and L4452A are supported on automated calibration systems which allow Agilent to provide this service at competitive prices.

Calibration Interval

The instruments should be calibrated on a regular interval determined by the 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 L4451A and L4452A 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 instruments will remain within these limits unless the adjustments are performed.

Use the Calibration Count feature (see page 251) to verify that all adjustments have been performed.

248 L4400 User’s Guide