Fluke 225C Service Manual - Page 72

DMM Ohm Gain, Use the 5500A COMP 2 wire

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Fluke 19xB-19xC-2x5C Service Manual 3. Short circuit the banana jack Meter inputs properly (calibration includes Ohms zero!). 4. Press to start the zero calibration 5. Wait until the display shows the status :READY. 6. Remove the input terminations. 7. Continue at Section 5.6.8. 5.6.8 DMM Ohm Gain Proceed as follows to do the DMM Ohm Gain calibration: 1. Press to select first calibration adjustment step in Table 5-6. 2. Connect the test tool to the 5500A as shown in Figure 5-8. Notice that the sense leads must be connected directly to the test tool. Figure 5-8. Four-wire Ohms calibration connections al55ex4w.bmp 3. Set the 5500A to the first test point in Table 5-6. Use the 5500A "COMP 2 wire" mode for the calibration adjustments up to and including 100 kΩ. For the higher values, the 5500A will turn off the "COMP 2 wire" mode. 4. Set the 5500A to operate (OPR). 5. Press to start the calibration. 6. Wait until the display shows the 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. 8. When you are finished, set the 5500A to Standby. 9. Continue at Section 5.6.9. 5-16

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Fluke 19xB-19xC-2x5C
Service Manual
5-16
3.
Short circuit the banana jack Meter inputs properly (calibration includes Ohms
zero!).
4.
Press
to start the zero calibration
5.
Wait until the display shows the status
:READY
.
6.
Remove the input terminations.
7.
Continue at Section 5.6.8.
5.6.8 DMM Ohm Gain
Proceed as follows to do the DMM Ohm Gain calibration:
1.
Press
to select first calibration adjustment step in Table 5-6.
2.
Connect the test tool to the 5500A as shown in Figure 5-8.
Notice that the sense leads must be connected directly to the test tool.
al55ex4w.bmp
Figure 5-8. Four-wire Ohms calibration connections
3.
Set the 5500A to the first test point in Table 5-6.
Use the 5500A “COMP 2 wire”
mode for the calibration adjustments up to and including 100 k
Ω
.
For the higher
values, the 5500A will turn off the “COMP 2 wire” mode.
4.
Set the 5500A to operate (OPR).
5.
Press
to start the calibration.
6.
Wait until the display shows the 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.
8.
When you are finished, set the 5500A to Standby.
9.
Continue at Section 5.6.9.