Fluke 123/124/125
Service Manual
3-26
3.5.18 Diode Test Function Test
Proceed as follows to test the Diode Test function :
1. Connect the test tool to the 5500A as for the previous test (see Figure 3-9).
2. Press
to open the INPUT A MEASUREMENTS menu, and choose:
MEASURE on A: DIODE
3. Set the 5500A to 1 kΩ. Use the 5500A “COMP 2 wire” mode. Set the 5500A to Operate
(OPR).
4. Observe the main reading and check to see if it is within 0.425 and 0.575V.
5. Set the 5500A to 1V DC.
6. Observe the main reading and check to see if it is within 0.975 and 1.025V.
7. When you are finished, set the 5500A to Standby.
3.5.19 Capacitance Measurements Test
Proceed as follows:
1. Connect the test tool to the 5500A as for the previous test (see Figure 3-9).
Ensure that the 5500A is in Standby.
2. Select the following test tool setup:
• Press
to open the INPUT A MEASUREMENTS menu, and choose:
MEASURE on A: CAP
• Press
to select auto ranging (AUTO in top of display).
• Press
to open the INPUT A MEASUREMENTS menu.
• Fluke 123/124: press
to select the METER A OPTIONS MENU, and choose:
SMOOTHING: NORMAL | ZERO REF: ON
The ZERO REF function is used to eliminate the capacitance of the test leads.
• Fluke 125: press
to select ZERO reference. This function is used to eliminate
the capacitance of the test leads.
• Fluke 125: press
to select MENU
• Fluke 125: press
to select:
SMOOTHING READING A: NORMAL
3. Set the 5500A to the first test point in Table 3-9. Use the 5500A “COMP OFF” mode.
Set the 5500A to Operate (OPR).
4. Observe the Input A main reading and check to see if it is within the range shown under
the appropriate column.
5. Continue through the test points.
6. When you are finished, set the 5500A to Standby.
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