FLUKE-87-5-EX Fluke Electronics, FLUKE-87-5-EX Datasheet - Page 32
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FLUKE-87-5-EX
Manufacturer Part Number
FLUKE-87-5-EX
Description
MULTIMETER INDUSTRIAL TRU RMS
Manufacturer
Fluke Electronics
Series
8xr
Type
Digital (DMM)r
Specifications of FLUKE-87-5-EX
Includes
Battery, Clips, Temperature Probe, Test Leads
Style
Handheld
Display Digits
4.5
Display Type
LCD, Bar Graph
Display Count
20000
Function
Voltage, Current, Resistance, Capacitance, Temperature, Frequency
Functions, Extra
Continuity, Diode Test
Features
Auto Off, Backlight, Clips, Hold, Min/Max/Ave
Ranging
Auto/Manual
Response
True RMS
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
2547226
Users Manual
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.
24
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.
WCaution
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 (< .85 V). A
continuous beep sounds if the reading is
reading would indicate a short circuit. The display shows
“OL” if the diode is open.
.100 V. This