Agilent Technologies Switch/Measure manual Calibration Overview, Calibration Security

2Features and Functions

Calibration Overview

This section gives a brief introduction to the calibration features of the instrument and plug- in modules. For a more detailed discussion of the calibration procedures, see the Agilent 34980A Service Guide.

Calibration Security

This feature allows you to enter a security code to prevent accidental or unauthorized calibrations of the instrument. The specified code is used to unsecure the mainframe and all installed modules. When you first receive your instrument, it is secured. Before you can calibrate the instrument, you must unsecure it by entering the correct security code.

•The security code is set to “AT34980” when the instrument is shipped from the factory. The security code is stored in non- volatile memory in the mainframe, and does not change when power has been off, after a Factory Reset (*RST command), or after an Instrument Preset

(SYSTem:PRESet command).

•The security code can contain up to 12 characters. The first character must be a letter (A- Z), but the remaining 11 characters can be letters, numbers (0- 9), or the underscore character (“_”). Blank spaces are not allowed. You do not have to use all 12 characters but the first character must always be a letter.

To Unsecure the Instrument for Calibration

You can unsecure the instrument from either the front panel or over the remote interface. The instrument is secured when shipped from the factory.

Once you enter a security code, that code must be used for both front- panel and remote operation. For example, if you secure the instrument from the front panel, you must use that same code to unsecure it from the remote interface.

Front Panel Operation: Utility > CALIBRATE > UNSECURE

Remote Interface Operation: To unsecure the instrument, send the following command (the factory security code is shown).

CAL:SECURE:STATE OFF,AT34980

70 34980A User’s Guide