Fluke 381 Fluke 381 Users Manual - Page 30

Resistance/Continuity, Inrush Current Measurement (Jaw and Flexible Current Probe)

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381 Users Manual Resistance/Continuity To measure resistance or continuity: 1. Turn the Rotary Function Switch to K. 2. Remove power from the circuit being tested. 3. Connect the black test lead to the COM terminal and the red test lead to the G terminal. 4. Measure the resistance by touching the probes to the desired test points of the circuit. 5. View the reading on the display. If the resistance is < 30 Ω, continuity is indicated by a beeper continuously sounding. If the display reads OL, the circuit is open. Inrush Current Measurement (Jaw and Flexible Current Probe) The Meter can capture the initial inrush current when starting a device such as a motor or light ballast. To measure the inrush current: 1. With the device under test off, turn the Meter Rotary Function Switch to A, C, or D if the Flexible Current Probe is being used for the measurement. 2. Center the Jaw or Flexible Current Probe around the device's live wire. 3. Push E on the Meter. 4. Turn on the device under test. The inrush current (spike) is displayed on the Meter display. See Figure 7. 26

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381
Users Manual
26
Resistance/Continuity
To measure resistance or continuity:
1.
Turn the Rotary Function Switch to
K
.
2.
Remove power from the circuit being tested.
3.
Connect the black test lead to the
COM
terminal and the red test lead to the
G
terminal.
4.
Measure the resistance by touching the probes to the desired test points of the circuit.
5.
View the reading on the display.
If the resistance is < 30
Ω
, continuity is indicated by a beeper continuously sounding. If the
display reads
OL
, the circuit is open.
Inrush Current Measurement (Jaw and Flexible Current Probe)
The Meter can capture the initial inrush current when starting a device such as a motor or light
ballast. To measure the inrush current:
1.
With the device under test off, turn the Meter Rotary Function Switch to
A
,
C
, or
D
if the
Flexible Current Probe is being used for the measurement.
2.
Center the Jaw or Flexible Current Probe around the device’s live wire.
3.
Push
E
on the Meter.
4.
Turn on the device under test. The inrush current (spike) is displayed on the Meter display.
See Figure 7.