Chapter 3 Calibration Procedures
Agilent Technologies Calibration Services
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Note   If you calibrate the power supply over the remote interface, you must send the *RST 
command to the power supply or turn the power supply off and on again after 
performing a calibration to ensure proper power supply operation.
Closed-Case Electronic Calibration The power supply features closed-
case electronic calibration since no internal mechanical adjustments are 
required for normal calibration. The power supply calculates correction 
factors based upon the input reference value you enter. The new correction 
factors are stored in non-volatile memory until the next calibration adjustment 
is performed. (Non-volatile memory does not change when power has been 
off or after a remote interface reset.)
Agilent Technologies Calibration Services
When your power supply is due for calibration, contact your local Agilent 
Technologies Service Center for a low-cost calibration. The Agilent E3633A 
and E3634A power supplies are supported on calibration processes which 
allow Agilent Technologies to provide this service at competitive prices.
Calibration Interval
The power supply should be calibrated on a regular interval determined by the 
accuracy requirements of your application. A 1-year interval is adequate for 
most applications. Agilent Technologies does not recommend extending 
calibration intervals beyond 1 year for any application. Agilent Technologies 
recommends that complete re-adjustment should always be performed at the 
calibration interval. This will increase your confidence that the Agilent E3633A 
and E3634A will remain within specification for the next calibration interval. 
This criteria for re-adjustment provides the best long-term stability.