Fluke 225C Service Manual - Page 64

Final Calibration, Error, messages, 6.1 Input A LF-HF Gain

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Fluke 19xB-19xC-2x5C Service Manual 5.6 Final Calibration Before starting the final calibration you must have done the WarmingUp & PreCalibration (section 5.5)! The final calibration requires input conditions that will be described in each step. After starting a step, several steps that require the same input conditions will be done automatically. So if you start for example calibration step CL 0915, the calibration can include also step CL 0916, and at the end the display then shows CL 0916: READY You must always start the Final Calibration at the first step, see Section 5.6.1. Starting at another step will make the calibration invalid! If you proceeded to calibration step N (for example step CL 0620), then return to a previous step (for example step CL 0616) , and then calibrate this step, the complete final calibration becomes invalid; then you must repeat the calibration starting at 5.6.1. It is allowed to repeat a step that shows the status :READY by pressing again. Error messages Proceed as follows if an error message ERROR: nnnn is displayed during calibration: • if nnnn < 5000 then check input signal and test leads, and repeat the current step by pressing again. • if nnnn ≥ 5000 then check input signal and test leads, and repeat the final calibration starting at section 5.6.1. If the error persists the test tool is defective. 5.6.1 Input A LF-HF Gain Proceed as follows to do the Input A LF-HF Gain calibration: 1. Connect the test tool to the 5500A as shown in Figure 5-3. Figure 5-3. 5500A SCOPE Output to Test Tool Input A al55sca.bmp 5-8

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Fluke 19xB-19xC-2x5C
Service Manual
5-8
5.6 Final Calibration
Before starting the final calibration you must have done the WarmingUp &
PreCalibration (section 5.5)!
The final calibration requires input conditions that will be described in each step.
After
starting a step, several steps that require the same input conditions will be done
automatically.
So if you start for example calibration step CL 0915, the calibration can
include also step CL 0916, and at the end the display then shows CL 0916: READY
You must always start the Final Calibration at the first step, see Section 5.6.1.
Starting at
another step will make the calibration invalid!
If you proceeded to calibration step N (for example step CL 0620), then return to a
previous step (for example step CL 0616) , and then calibrate this step, the complete final
calibration becomes invalid; then you must repeat the calibration starting at 5.6.1.
It is allowed to repeat a step that shows the status
:READY
by pressing
again.
Error
messages
Proceed as follows if an error message
ERROR: nnnn
is displayed during calibration:
•
if
nnnn
< 5000 then check input signal and test leads, and repeat the current step by
pressing
again.
•
if
nnnn
≥
5000 then check input signal and test leads, and repeat the final calibration
starting at section 5.6.1.
If the error persists the test tool is defective.
5.6.1 Input A LF-HF Gain
Proceed as follows to do the Input A LF-HF Gain calibration:
1.
Connect the test tool to the 5500A as shown in Figure 5-3.
al55sca.bmp
Figure 5-3. 5500A SCOPE Output to Test Tool Input A