Fluke 87V MAX User Manual

87V MAX
Users Manual
20
Diode Tests
XW Warning
To prevent possible electrical shock, fire, or
personal injury, disconnect power and
discharge all high-voltage capacitors before
you measure resistance, continuity,
capacitance, or a diode junction.
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.
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Fluke 87V MAX Specifications

General

Waterproof	Yes
Product type	Digital multimeter
Product color	Yellow
Frequency range	0.5 - 199.99 kHz
DC voltage range	0.1 - 1000 V
Resistance range	0.1 - 50 Ω
Capacitance range	0.1 - 9999 nF
Measuring category	CAT III 1000V
Placement supported	Handheld multimeter
Resistance resolution	0.1 Ω
Resolution (frequency)	0.01 Hz
Resolution (AC current)	0.1 µA
Resolution (DC voltage)	0.1 mV
Temperature measurement range	-200 - 1090 °C
International Protection (IP) code	IP67
Battery life	800 h
Battery type	AA
Power source	Battery
Number of batteries supported	3

Weight and Dimensions

Depth	215 mm
Width	600 mm
Height	101 mm
Weight	698.5 g