Fluke 225C Service Manual - Page 71

Input A& B, and DMM Zero, Short circuit Input A and Input B.

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5 Calibration Adjustment 5.6 Final Calibration Figure 5-7. 5500A NORMAL Output to Test Tool Banana Input al55ex2w.bmp 3. Set the 5500A to supply a DC voltage, to the first calibration point in Table 5-5. 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 5-4 8. Set the 5500A to Standby, and continue at Section 5.6.7. Table 5-5. DMM Gain Calibration Points Cal step UUT input value (5500A NORMAL) CL 0840 CL 0849 CL 0841 CL 0842 CL 0843 CL 0844 500 mV 2.5 V 5 V 50 V (set 5500A to OPR!) 500 V 1000 V 5.6.7 Input A& B, and DMM Zero Proceed as follows to do the Input A&B, and the DMM Zero calibration: 1. Press to select calibration adjustment step CL0852 2. Short circuit Input A and Input B. 5-15

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Calibration Adjustment
5.6 Final Calibration
5
5-15
al55ex2w.bmp
Figure 5-7. 5500A NORMAL Output to Test Tool Banana Input
3.
Set the 5500A to supply a DC voltage, to the first calibration point in Table 5-5.
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 5-4
8.
Set the 5500A to Standby, and continue at Section 5.6.7.
Table 5-5. DMM Gain Calibration Points
Cal step
UUT input value (5500A NORMAL)
CL 0840
500 mV
CL 0849
2.5 V
CL 0841
5 V
CL 0842
50 V
(set 5500A to OPR!)
CL 0843
500 V
CL 0844
1000 V
5.6.7 Input A& B, and DMM Zero
Proceed as follows to do the Input A&B, and the DMM Zero calibration:
1.
Press
to select calibration adjustment step CL0852
2.
Short circuit Input A and Input B.