Fluke 225C Service Manual - Page 67

Input A&B LF-HF Gain

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5 Calibration Adjustment 5.6 Final Calibration 5.6.3 Input A&B LF-HF Gain Proceed as follows to do the Input A&B LF-HF Gain calibration. 1. Press to select the first calibration step in Table 5-3. 2. Connect the test tool to the 5500A as shown in Figure 5-5. Figure 5-5. Test tool Input A&B to 5500 Scope Output alscab.bmp 3. Set the 5500A to supply a 1 kHz square wave (SCOPE, MODE volt, SCOPE Z 1 MΩ), to the first calibration point in Table 5-3. Warning Dangerous voltages will be present on the calibration source and connection cables during the following steps. Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool. 4. Set the 5500A to operate (OPR). 5. Press to start the calibration. 6. Wait until the display shows calibration status :READY. 7. Press to select the next calibration step, set the 5500A to the next calibration point, and start the calibration. Continue through all calibration points of Table 5-3. 8. Set the 5500A to Standby, and continue at Section 5.6.4. 5-11

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Calibration Adjustment
5.6 Final Calibration
5
5-11
5.6.3 Input A&B LF-HF Gain
Proceed as follows to do the Input A&B LF-HF Gain calibration.
1.
Press
to select the first calibration step in Table 5-3.
2.
Connect the test tool to the 5500A as shown in Figure 5-5.
alscab.bmp
Figure 5-5. Test tool Input A&B to 5500 Scope Output
3.
Set the 5500A to supply a 1 kHz square wave (SCOPE, MODE volt, SCOPE Z
1 M
Ω
), to the first calibration point in Table 5-3.
Warning
Dangerous voltages will be present on the calibration source
and connection cables during the following steps.
Ensure that
the calibrator is in standby mode before making any connection
between the calibrator and the test tool.
4.
Set the 5500A to operate (OPR).
5.
Press
to start the calibration.
6.
Wait until the display shows calibration status
:READY
.
7.
Press
to select the next calibration step, set the 5500A to the next calibration
point, and start the calibration.
Continue through all calibration points of Table 5-3.
8.
Set the 5500A to Standby, and continue at Section 5.6.4.