Fluke 377FC AC/DCTrue RMS Clampmeter with iFlex

Voltage and current measurements with FieldSense™ technology
The Fluke 377 FC true-rms clamp meter uses FieldSense™ technology to make testing faster and safer, all without contacting a live conductor. You get accurate voltage and current measurements through the clamp jaw. Simply clip the black test lead to any electrical ground, put the clamp jaw around the conductor and see reliable, accurate voltage and current values on the display.

Measure extremely high current with iFlex® probe
Use the included iFlex flexible current probe to measure ac current as high as 2500 A. The iFlex probe provides access to large conductors in tight spaces.

Complete 3-phase measurements in quick, easy steps
Complete 3-phase voltage and current tests in 3 easy steps
Full set of phase-to-ground and phase-to-phase values calculated and shown on the meter
Values are also displayed on your smart phone and saved to the cloud via Fluke Connect software
Phase rotation auto-calculated and shown on the Fluke Connect software
No more hand-written notes or complicated math.
Easy to see, easy to use with included tools
Your job will get easier when you use the 377 FC clamp meter. The display turns green when a stable FieldSense measurement is detected. Visual Continuity also provides a bright green screen for easy detection of continuity in noisy work areas.

Record, analyze, share results with Fluke Connect® software
With Fluke Connect software you can remotely log, trend and monitor measurements to pinpoint intermittent faults. Fluke Connect also allows you to gather data as the basis for a preventive maintenance program.

General specifications
General Maximum Voltage between any Terminal and Earth Ground 1000 V
Battery Type 2 AA IEC LR6 alkaline
Life 200 hour
Display Dual readout
Automatic Power Off 20 minutes
Electrical
AC Current: Jaw
Range 999.9 A
Resolution 0.1 A
Accuracy 2 % ±5 digits (45 Hz to 66 Hz)
Crest Factor (50/60 Hz) 3 @ 500 A
2.5 @ 600 A
1.42 @ 1000 A
Add 2 % for C.F. >2
AC Current: Flexible Current Probe
Range 2500 A
Resolution 1 A (≤2500 A) 0.1 A (≤999.9 A)
Accuracy 3 % ±5 digits (5 Hz to 500 Hz)
Crest Factor (50/60Hz) 3.0 at 1100 A
2.5 at 1400 A
1.42 at 2500 A
Add 2 % for C.F. >2
Position Sensitivity
Flexible current probe Distance from Optimum i2500-10 Flex i2500-18 Flex Error
A 0.5 in (12.7 mm) 1.4 in (35.6 mm) ± 0.5 %
B 0.8 in (20.3 mm) 2.0 in (50.8 mm) ± 1.0 %
C 1.4 in (35.6 mm) 2.5 in (63.5 mm) ± 2.0 %
Measurement uncertainty assumes centralized primary conductor at optimum position, no external electrical or magnetic field, and within operating temperature range.
DC Current
Range 999.9 A
Resolution 0.1 A
Accuracy 2 % ±5 digits1
[1]When using the ZERO function to compensate for offsets
AC Voltage: Field Sense
Range 1000 V
Resolution 1 V (≤1000V)
Accuracy ≤4/0 AWG 3 % ±5 digits (45 Hz to 66 Hz)
≥4/0 AWG 5 % ±5 digits (45 Hz to 66 Hz)
Position wire as close as possible to jaw opening (see illustration).
AC Voltage: Test Leads
Range 600.0 V 1000 V
Resolution 0.1 V (≤600.0 V)
1 V (≤1000 V)
Accuracy 1 % ±5 digits (20 Hz to 500 Hz)
DC Voltage
Range 600.0 V
1000 V
Resolution 0.1 V (≤600.0 V)
1 V (≤1000 V)
Accuracy 1 % ±5 digits
mV dc
Range 500.0 mV
Resolution 0.1 mV
Accuracy 1 % ±5 digits
Amps Frequency: Jaw
Range 45 Hz to 66 Hz
Resolution 0.1 Hz
Accuracy 0.5 % ±5 digits
Trigger Level 5 Hz to 10 Hz, ≥10 A
10 Hz to 100 Hz, ≥ 5 A
100 Hz to 500 Hz, ≥ 10 A
Amps Frequency: Flexible Current Probe
Range 5.0 Hz to 500.0 Hz
Resolution 0.1 Hz
Accuracy 0.5 % ±5 digits
Trigger Level 5 Hz to 20 Hz, ≥25 A
20 Hz to 100 Hz, ≥20 A
100 Hz to 500 Hz,≥25 A
Resistance
Range 60.00 kΩ
6000 Ω
600.0 Ω
Resolution 0.1 Ω (≤600.0 Ω)
1 Ω (≤6000 Ω)
10 Ω (≤60.00 kΩ)
Accuracy 1 % ±5 digits
Capacitance
Range 1000 μF
Resolution 0.1 μF (≤100.0 μF)
1 μF (≤1000 μF)
Accuracy 1 % ±4 digits