Fluke 125B/S Calibration Guide - Page 42

Warm Up and Pre-Calibration, Final Calibration, Delta T Gain, LF- HF Gain Input, Filter, A & B

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123B/124B/125B Calibration Manual Table 12. Screen Messages and Softkey Functions Status Message or Softkey IDLE (valid) IDLE (invalid) BUSY aaa% bbb% READY Error :xxxx  PREV  NEXT  CAL  EXIT Explantion 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. Select the previous step. Select the next step. Start the calibration adjustment of the actual step. Leave the Maintenance mode. After you complete a calibration step, readings and traces show with the new calibration data. Warm Up and Pre-Calibration When the Test Tool enters the Warm Up and Pre-Calibration state, the display shows: WarmingUp (CL 0200):IDLE (valid) or (invalid). Note You must always start the Warming-Up and Pre-Calibration at Warming-Up (CL0200) . Starting at any other step will make the calibration invalid. To start the warm up: 1. Remove all input connections from the Test Tool. 2. Push  to start the Warming-Up & Pre-Calibration procedure. The display shows the calibration step in progress, and its status. The first step is: WarmingUp (CL0200) :BUSY 00:29:59 The warming-up period is counted down from 00:29:59 to 00:00:00. The other pre-calibration steps are performed automatically. The procedure takes about 60 minutes. 3. Wait until the display shows End Precal :READY and continue to Final Calibration. Final Calibration It is important that you always start the Final Calibration at the first step. Starting at another step will make the calibration invalid. If you proceed to step N (for example, step CL 0615), return to a previous step (for example, step CL 0613), and then calibrate this step, the complete final calibration becomes invalid. You must do the final calibration from the beginning (step CL 0600) again. Push  to repeat a step that shows the status :READY. Delta T Gain, LF- HF Gain Input, Filter, A & B To do the HF Gain Input A & B calibration: 1. Push  to select the first Calibration Step, Delay (CL 0280):, in Table 13. 2. Connect the Test Tool to the Calibrator. See Figure 10. Make sure you use a single 50 Ω terminator at the end of the connection. 34

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123B/124B/125B
Calibration Manual
34
After you complete a calibration step, readings and traces show with the new calibration data.
Warm Up and Pre-Calibration
When the Test Tool enters the Warm Up and Pre-Calibration state, the display shows:
WarmingUp (CL 0200):IDLE (valid)
or
(invalid).
Note
You must always start the Warming-Up and Pre-Calibration at Warming-Up (CL0200) .
Starting at any other step will make the calibration invalid.
To start the warm up:
1.
Remove all input connections from the Test Tool.
2.
Push
to start the Warming-Up & Pre-Calibration procedure.
The display shows the calibration step in progress, and its status. The first step is:
WarmingUp (CL0200) :BUSY 00:29:59
The warming-up period is counted down from 00:29:59 to 00:00:00. The other pre-calibration steps are
performed automatically. The procedure takes about 60 minutes.
3.
Wait until the display shows
End Precal :READY
and continue to
Final Calibration
.
Final Calibration
It is important that you always start the Final Calibration at the first step. Starting at another step will make the
calibration invalid. If you proceed to step N (for example, step CL 0615), return to a previous step (for example, step
CL 0613), and then calibrate this step, the complete final calibration becomes invalid. You must do the final
calibration from the beginning (step CL 0600) again.
Push
to repeat a step that shows the status
:READY
.
Delta T Gain, LF- HF Gain Input, Filter, A & B
To do the HF Gain Input A & B calibration:
1.
Push
to select the first Calibration Step,
Delay (CL 0280):
, in Table 13.
2.
Connect the Test Tool to the Calibrator. See Figure 10. Make sure you use a single 50
Ω
terminator at the end of
the connection.
Table 12. Screen Messages and Softkey Functions
Status Message
or Softkey
Explantion
IDLE (valid)
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.
IDLE (invalid)
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.
BUSY aaa% bbb%
Calibration adjustment step in progress; progress % for Input A and Input B.
READY
Calibration adjustment step finished.
Error :xxxx
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.
PREV
Select the previous step.
NEXT
Select the next step.
CAL
Start the calibration adjustment of the actual step.
EXIT
Leave the Maintenance mode.