HP 83487A User Manual page 47

Plug-in Module Vertical Calibration
The plug-in module vertical calibration is for both optical and electrical mea-
surements. It allows the instrument to establish the calibration factors for a
specific plug-in when the plug-in is installed in the mainframe. The plug-in cal-
ibration factors are valid only for the specific mainframe slot in which it was
calibrated. The plug-in vertical calibration establishes vertical accuracy.
A plug-in vertical calibration should be done if:
• The mainframe has cycled power.
• The plug-in has been repaired, reprogrammed, or removed from the
mainframe.
• The instrument's operating temperature has changed and remains more than
5°C from the temperature at which the Plug-in calibration was performed.
To obtain the best measurement results, it is recommended that a user verti-
cal calibration be performed after every 10 hours of continuous use or if the
temperature has changed by greater than 2°C from the previous vertical cali-
bration.
To view the temperature change
This procedure displays the temperature change that the instrument has
undergone since the last Plug-in Vertical Calibration.
1 Press the front-panel channel SETUP key.
2 Press Calibrate and then Cal status on.
The current plug-in ∆Temp value is listed for each installed module.
To perform a plug-in module vertical calibration
1 Remove any front-panel connections from electrical channels.
2 Cover the optical inputs for the optical channels.
3 Press Utility, Calibrate. . ., and then Calibrate plug-in. . ..
4 Select the plug-in module to be calibrated, press 1 and 2 or 3 and 4.
5 Press Start cal to start the calibration.
6 Follow the on-screen instructions.
Calibration Overview
User Calibrations—Optical and Electrical
3-11