Fluke 381 Fluke 381 Users Manual - Page 14

Flexible Current Probe, Auto Power Off, Backlight

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381 Users Manual Hazardous Voltage Indicator When the Meter senses a voltage ±30 V or a voltage overload (OL), Y is shown on the display and the red high-voltage LED () on the Meter base illuminates to tell you a hazardous voltage is at the Meter input. Flexible Current Probe XWWarning To avoid electrical shock, do not apply or remove from live hazardous conductors. The high-performance AC Flexible Current Probe utilizes the Rogowski principle and is used for accurate, non-intrusive measurement of sinusoidal, pulsed, and other complex waveforms. The flexible and lightweight measuring head allows quick and easy installation in hard-to-reach areas and works well with large conductors. For more information about the Flexible Current Probe, see "Current Measurement (Flexible Current Probe)". Auto Power Off The Meter powers off if there is no button push or Rotary Function Switch operation for 20 minutes. If the Meter powers off, turn the Rotary Function Switch OFF and then back on again. Auto Power Off is disabled during Min Max Avg function use. To disable the Auto Power Off, hold down  while turning on the Meter. 10

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381
Users Manual
10
Hazardous Voltage Indicator
When the Meter senses a voltage
±
30 V or a voltage overload (OL),
Y
is shown on the display
and the red high-voltage LED (
) on the Meter base illuminates to tell you a hazardous voltage
is at the Meter input.
Flexible Current Probe
XW
Warning
To avoid electrical shock, do not apply or remove from live hazardous
conductors.
The high-performance AC Flexible Current Probe utilizes the Rogowski principle and is used for
accurate, non-intrusive measurement of sinusoidal, pulsed, and other complex waveforms. The
flexible and lightweight measuring head allows quick and easy installation in hard-to-reach areas
and works well with large conductors.
For more information about the Flexible Current Probe, see “Current Measurement (Flexible
Current Probe)”.
Auto Power Off
The Meter powers off if there is no button push or Rotary Function Switch operation for
20 minutes. If the Meter powers off, turn the Rotary Function Switch OFF and then back on again.
Auto Power Off is disabled during Min Max Avg function use. To disable the Auto Power Off, hold
down
while turning on the Meter.