Fluke 787 user manual Testing Diodes, Displaying Minimum, Maximum, and Average

787

Users Manual

Testing Diodes

To test a single diode:

1.Insert the red test lead into the Vjack and black test lead into the COM jack.

2.Set the rotary switch to O.

3.Press the BLUE pushbutton so that the D symbol is on the display.

4.Touch the red probe to the anode and the black probe to the cathode (side with band or bands). The meter should indicate the appropriate diode voltage drop.

5.Reverse the probes. The meter should display OL, indicating a high impedance.

6.The diode is good if it passes the tests in steps 4 and 5.

Displaying Minimum, Maximum, and Average

MIN MAX recording stores the lowest and highest measurements, and maintains the average of all measurements.

Press Mto turn on MIN MAX recording. Readings are stored until you turn the meter off, switch to another measurement or source function, or turn MIN MAX off.

The beeper sounds when a new maximum or minimum is recorded. Auto power-off is disabled and auto ranging is turned off during MIN MAX recording.

Press Magain to cycle through the MAX, MIN, and AVG displays. Press and hold Mfor 1 second to erase stored measurements and exit .

If MIN MAX recording is on continuously for over 40 hours, minimum and maximum readings are still recorded, but the displayed average no longer changes.

In MIN MAX recording, press Ito suspend recording; press Iagain to resume recording.

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