Resistance/Continuity; Inrush Current Measurement (Jaw And Flexible Current Probe) - Fluke 381 User Manual

381
Users Manual

Resistance/Continuity

To measure resistance or continuity:
1. Turn the Rotary Function Switch to
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 , 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
K
.