HP 83487A, User Manual, Page: 35 / 98

2-13
Channel Setup Menu
Calibrate
Cal status
The
Cal status
function displays a screen similar to Figure 2-3 .
Key Path
Channel, Calibrate, Cal Status
Figure 2-3. A typical Cal Status display.
Current Date
This is the current date and time. You can compare this to the last plug-in
module calibration time to see how long it has been since calibration was per-
formed.
Current Frame
∆
Temp
This is the temperature change on the inside of the instrument since the last
mainframe calibration was performed. The number indicates how many
degrees warmer or cooler the mainframe is compared to the last calibration.
Channel 1
Calibration
Status
The instrument displays
Calibrated
or
Uncalibrated
, depending on
whether the last plug-in module calibration is still valid. A calibration can be
invalidated 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.
Uncalibrated
indicates the plug-in module vertical calibration is invalid.