Description
Fluke 377 FC Specifications
Electrical Measurements
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AC Current (Clamp Jaw)
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Range: Up to 999.9A
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Resolution: 0.1A
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Accuracy: 2% 5 digits (10100Hz), 2.5% 5 digits (100500Hz)
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Crest Factor: Up to 3 (varies with current range)
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AC Current (iFlex Flexible Current Probe)
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Range: Up to 2500A
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Resolution: 0.1A to 1A
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Accuracy: 3% 5 digits (5500Hz)
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DC Current (Clamp Jaw)
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Range: Up to 999.9A
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Resolution: 0.1A
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Accuracy: 2% 5 digits
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AC Voltage (FieldSense, Non-Contact)
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Range: Up to 1000V
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Accuracy: 3% 5 digits (typical for conductors up to 4/0 AWG)
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AC/DC Voltage (Test Leads)
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Range: Up to 1000V
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Resolution: 0.1V (600V), 1V (1000V)
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Accuracy: 1% 5 digits
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DC mV Input
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Range: Up to 500.0mV
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Resolution: 0.1mV
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Accuracy: 1% 5 digits
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Frequency (Clamp or iFlex)
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Range: 5Hz to 500Hz
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Resolution: 0.1Hz
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Accuracy: 0.5% 5 digits
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Resistance
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Range: Up to 60k
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Resolution: 0.1 / 1 / 10
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Accuracy: 1% 5 digits
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Capacitance
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Range: Up to 1000F
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Resolution: 0.1F to 1F
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Accuracy: 1% 4 digits
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Features
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FieldSense Technology: Non-contact measurement of voltage and current
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iFlex Probe: Expands current measurement range to 2500A AC
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Three-Phase Testing: Complete 3-phase voltage and current measurement in 3 quick steps
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Fluke Connect Compatible: Wireless logging, remote monitoring, and reporting
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Visual Continuity & Measurement Stability Indicators: Visual cues for live circuits and stable readings
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Data Hold, Auto Power-Off, Min/Max/Avg Recording
Physical & General Specs
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Jaw Opening: 34mm
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iFlex Probe: 1.8m length, 7.5mm diameter, 450mm Rogowski coil
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Display: Dual-display for simultaneous measurement readouts
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Battery: 2 AA batteries
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Battery Life: ~200 hours
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Dimensions: 274 86 47mm
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Weight: Approx. 463g
Environmental & Safety Ratings
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Operating Temperature: 10C to +50C
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Storage Temperature: 40C to +60C
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Humidity: 0%90% RH (non-condensing up to 30C)
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Altitude: Operating up to 2000m
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Ingress Protection: IP30 (with jaw closed)
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Safety Category Ratings: CAT III 1000V / CAT IV 600V
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Pollution Degree: 2
Summary Table
| Function | Range / Accuracy |
|---|---|
| AC Current (Clamp) | Up to 999.9A / 2% 5 digits |
| AC Current (iFlex) | Up to 2500A / 3% 5 digits |
| DC Current | Up to 999.9A / 2% 5 digits |
| Voltage (AC/DC) | Up to 1000V / 1% 5 digits |
| FieldSense Voltage | Up to 1000V / 3% 5 digits |
| Resistance | Up to 60k / 1% 5 digits |
| Capacitance | Up to 1000F / 1% 4 digits |
| Frequency | 5500Hz / 0.5% 5 digits |
| Display | Dual, backlit |
| Power Supply | 2 AA batteries |
