Fluke ScopeMeter 123 Service Manual page 87

4. Continue with either a. or b. below:
a. To calibrate the display contrast adjustment range and the default contrast, go to
Section 5.4 Contrast Calibration Adjustment.
This calibration step is only required if the display cannot made dark or light
enough, or if the display after a test tool reset is too light or too dark.
b. To calibrate the test tool without calibrating the contrast , go to Section 5.5
Warming Up & Pre-calibration.
Explanation of screen messages and key functions.
When the test tool is in the Maintenance Mode, only the F1 to F4 soft keys, the ON/OFF
key, and the backlight key can be operated, unless otherwise stated.
The calibration adjustment screen shows the actual calibration step (name and number)
and its status :
Cal Name (CL nnnn) :Status
can be:
Status
IDLE (valid)
IDLE (invalid)
BUSY aaa% bbb%
READY
Error :xxxx
Functions of the keys F1-F4 are:
PREV select the previous step
NEXT select the next step
CAL
start the calibration adjustment of the actual step
EXIT leave the Maintenance mode
Readings and traces
After completing a calibration step, readings and traces are shown using the new
calibration data.
Calibration step nnnn
After (re)entering this step, the calibration process is not started.
The calibration data of this step are valid. This means that the
last time this step was done, the calibration process was
successful. It does not necessarily mean that the unit meets the
specifications related to this step!
After (re)entering this step, the calibration process is not started.
The calibration data are invalid. This means that the unit will not
meet the specifications if the calibration data are saved.
Calibration adjustment step in progress; progress % for Input A
and Input B.
Calibration adjustment step finished.
Calibration adjustment failed, due to wrong input signal(s) or
because the test tool is defective. The error codes xxxx are
shown for production purposes only.
Calibration Adjustment
5.3 Starting Calibration Adjustment
5
5-5