Specifications

Verification and Calibration

Further Verification and Calibration topics:

Recommended Test Equipment and Setups

Performance Verification

Calibration Procedure

Test Record Forms

Verification

The verification procedures verify that the Agilent N8900 series power supply is operating normally and is within pub-

lished specifications. If the instrument fails any of the tests or if abnormal test results are obtained, try calibrating the

unit. If calibration is unsuccessful, return the unit to an Agilent Technologies Service Center.

Agilent Technologies Calibration Services - Your local Agilent Technologies Service Center offers low-cost recal-

ibration. The service center uses automated calibration systems that allow Agilent to provide calibration at competitive

prices.

Agilent Technologies recommends that complete verification should always be performed at the calibration interval. If

the power supply passes the verification tests, the unit is operating within its calibration limits and does not need to be

re-calibrated. This ensures that the instrument will remain within specifications for the next calibration interval and

provides the best long-term stability. Performance data measured using this method can be used to extend future cal-

ibration intervals.

Calibration Interval

The instrument 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.

Test Considerations

For optimum performance, all verification and calibration procedures should comply with the following recom-

mendations:

l Ambient temperature is stable, at 23°C ±5°C.

l Ambient relative humidity is less than 70%.

l 30 minute warm-up period before verification or adjustment.

l Cables as short as possible, twisted or shielded to reduce noise.

Measurement Techniques

Voltmeter

To ensure that the values read by the voltmeter during both the verification procedure and the calibration procedure

are not affected by the instantaneous measurement of the AC peaks of the output current ripple, make several DC

measurements and average them. You can set up the voltmeter to do this automatically by programming ≥10 power

Agilent N8900 Series Operating and Service Guide 119