FLUKE 87V/IMSK User Manual for the Fluke 87V/IMSK Industrial Multimeter Service Combo Kit with current clamp, 1000 V, 10 A

Loading ...

80 Series V

Users Manual

Testing Diodes

W Caution

To avoid possible damage to the Meter or to

the equipment under test, disconnect circuit

power and discharge all high-voltage

capacitors before testing diodes.

Use the diode test to check diodes, transistors, silicon

controlled rectifiers (SCRs), and other semiconductor

devices. This function tests a semiconductor junction by

sending a current through the junction, then measuring

the junction's voltage drop. A good silicon junction drops

between 0.5 V and 0.8 V.

To test a diode out of a circuit, set up the Meter as shown

in Figure 7. For forward-bias readings on any

semiconductor component, place the red test lead on the

component's positive terminal and place the black lead on

the component's negative terminal.

In a circuit, a good diode should still produce a forward-

bias reading of 0.5 V to 0.8 V; however, the reverse-bias

reading can vary depending on the resistance of other

pathways between the probe tips.

A short beep sounds if the diode is good (< 0.85 V). A

continuous beep sounds if the reading is ≤ 0.100 V. This

reading would indicate a short circuit. The display shows

“OL” if the diode is open.

1.888.610.7664 sales@GlobalTestSupply.com

Fluke-Direct.com

Loading ...

FLUKE 87V/IMSK Industrial Multimeter Service Combo Kit with current clamp, 1000 V, 10 A