
APPLICATION NOTE
Guide to using FieldSense
in the 377 FC and 378 FC
Clamp Meter
Wires in tight compact spaces. Panels out of reach. Extra-large
conductors. We understand your workspace. The Fluke 377 FC and
378 FC Clamp Meters with FieldSense™ technology are the first
handheld clamp meters that let you measure voltage and current using
just the clamp jaw.
Fluke 378 FC Clamp Meter taking measurements in tight spaces
Applications
Tools with FieldSense are extremely versatile for
troubleshooting and routine maintenance applications in industrial, residential, and commercial
establishments.
Residential Commercial Industrial
Check if a circuit is live before starting work
Measure individual voltages (either AC
using FieldSense™ or DC using test leads)
Measure DC current through the jaw up to
1000 A
Measure AC Current up to 2500A through
the iFlex accessory
Determine component resistances up to
60 kΩ
Check circuit continuity
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Applications (continued)
Measure loads on a branch circuit at a
service panel
Residential Commercial Industrial
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Map outlets to breakers
Measure the load of a pump, motor, or
compressor
Determine voltage and current on lighting
systems
Check circuit loading at panelboards
(including feeder cables, branch circuits,
and neutrals) and the integrity of a grounding circuit
Generator/motor/chiller maintenance and
troubleshooting
Feed circuits coming into motors (up to
1000 amps)
Validate load measurements on motors and
pumps
Confirm transformer load and line voltage
Why FieldSense in a clamp meter?
FieldSense is an award-winning, breakthrough
technology in how voltage is measured.
While regular clamps detect a magnetic field to
derive an AC current measurement, FieldSense
also detects an electrical field to measure voltage
simultaneously. The result is that for the first time
in a Fluke clamp meter, voltage and current can
be measured at the same time using a clamp jaw:
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• Ability to take current and voltage measure-
ments at the same time with dual display
• Safer voltage measurements without having to
connect the clamp meter to a live conductor
• Rapid 3 phase measurements with auto calculation of phase to phase values and phase
rotation
• Built in Power Quality (PQ) indicator in 378 FC to
monitor power related issues
• Fluke Connect software to enable data logging,
seamless data transfer and reporting
2 Fluke Corporation Guide to using FieldSense in the 377 FC and 378 FC Clamp Meter