Agilent Technologies 83482A, Руководство пользователя, Страница: 48 / 88

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Calibration Overview
User Calibrations—Optical and Electrical
No additional equipment is required to perform a plug-in vertical calibration.
Reference signals are both generated and routed internally, for the optical and
electrical channels. If you are prompted to connect the calibrator output to
the electrical channel during an optical vertical calibration, then the factory O/
E calibration has been lost. The module must then be returned to Agilent
Technologies for calibration.
Offset Zero Calibration
The offset zero calibration performs a quick offset calibration on the optical
channel for optical measurements. Since the primary source of calibration
error on the optical channel is offset drift, this function is useful between the
plug-in module vertical calibrations if the plug-in module has not been
removed or reinstalled and the operating temperature has not changed more
than ±5
°
C. In order to ensure that instrument specifications are met, perform
the plug-in vertical calibration.
Performing an offset zero calibration is much faster than performing a com-
plete vertical calibration. For critical measurements where offset measure-
ment uncertainty is important to consider, perform an offset zero calibration
between module vertical calibrations. Perform an offset zero calibration if the
vertical scale or offset changes.
To initiate an offset calibration
1 Disconnect all inputs from the module being calibrated.
2 Cover all optical inputs.
3 Press the plug-in module’s front-panel optical channel SETUP key.
4 Press Calibrate and then Offset zero .