Power Health Indicator (378/378 Fc); Ac/Dc Voltage Measurement With Test Leads; Resistance/Continuity - Fluke 377 Manual

377/377 FC/378/378 FC
Users Manual

Power Health Indicator (378/378 FC)

The Power Health indicator shows that the ratio of the real power
compared to the apparent power or harmonic distortion is outside
the optimal range.
To setup:
1. Turn the control knob to U.
2. Connect the Clamp to ground with the ground lead.
If THD for PQ volts or PQ current or the power factor (PQ PF)
is outside the optimal range, the related indicator shows on
the display.
Fluke Connect supports the Power Health indicator.

AC/DC Voltage Measurement with Test Leads

To measure ac or dc voltage:
V
1. Turn control knob to or
2. Connect the black test lead to the COM terminal and the red
X
V
test lead to the terminal. See Figure XX.
3. Touch the probes to the test points of the circuit.
The display shows the measurement.
B
Use to toggle on/off the mV function shown in
yellow at the control knob position.
14
N
.
Note

Resistance/Continuity

To measure resistance or continuity:
1. Turn the control knob to
2. Remove power from the circuit to test.
3. Connect the black test lead to the COM terminal and the red
X
V
test lead to the terminal.
4. Touch the probes to the test points of the circuit.
The display shows the measurement.
If the resistance is <30 Ω, the beeper sounds continuously to
indicate continuity. If the display shows OL, the circuit is open.
To disable the beeper, see Power-On
D
.
Options.