Confidently take reliable readings with the True RMS Fluke 355 digital clamp meter, the tool of choice for high current clamp-on amp meter measurement up to 2000 A. The extra-wide jaw easily clamps around large conductors, typically found in high-current applications. The extra rugged design and CAT IV 600 V, CAT III 1000 V ratings add an extra element of user protection when taking high-powered measurements.
Accurate peak measurements can be taken using the in-rush current mode, ideal for motors and inductive loads. The 355 also measures voltage and resistance, making this an ideal clamp meter for utilities, electrical contractors and industrial service technicians.
Electrical Specifications | ||
Current measurement DC and AC 10 Hz to 100 Hz | Range | 40 A / 400 A / 2000 A / 1400 AC rms |
Resolution | 10 mA / 100 mA / 1 A | |
Accuracy | A: 1.5% rdg + 15 digits A: 1.5% rdg + 5 digits |
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Trigger level for Inrush | 0.50 A / 5.0 A / 5 A | |
Trigger level for Hz filter OFF | 2.50 A / 2.5 A / 8 A | |
Trigger level for Hz filter ON | 0.50 A / 2.5 A / 8 A | |
Crest Factor (50/60 Hz) | Range | 40 A / 400 A / 2000 A / 1400 AC rms |
Crest Factor1 | 2 @ 33 A, 2.4 @ 27 A 2 @ 330 A, 2.4 @ 270 A 2 @ 1000 A, 2.4 @ 833 A |
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Current measurement AC 100.1 Hz to 1 kHz | Range | 40 A / 400 A / 2000 A; 1400 AC rms |
Resolution | 10 mA / 100 mA / 1 A | |
Accuracy | 10 A: 3.5% rdg + 15 digits 10 A: 3.5% rdg + 5 digits |
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Trigger level for Inrush | 0.50 A / 5.0 A / 5 A | |
Trigger level for Hz filter OFF | 2.50 A / 2.5 A / 8 A | |
Trigger level for Hz filter ON | 0.50 A / 2.5 A / 8 A | |
Voltage measurement DC and AC 10 Hz to 100 Hz (600 V and 1000 V ranges have 10% over range to 660 V and 1100 V respectively.) |
Range | 4 V / 40 V / 400 V / 600 V AC rms / 1000 VDC |
Resolution | 1 mV / 10 mV / 100 mV / 1 V | |
Accuracy | 1% rdg + 10 digits 1% rdg + 5 digits |
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Trigger level for Hz filter OFF | 0.25 V / 6 V | |
Trigger level for Hz filter ON | 0.25 V / 6 V | |
Voltage measurement AC 100.1 Hz to 1 kHz (600 V and 1000 V ranges have 10% over range to 660 V and 1100 V respectively.) |
Range | 4 V / 40 V / 400 V / 600 V ac rms |
Resolution | 1 mV / 10 mV / 100 mV / 1 V | |
Accuracy | 3% rdg + 10 digits 3% rdg + 5 digits |
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Trigger level for Hz filter OFF | 0.050 V / 0.25 V / 6 V | |
Trigger level for Hz filter ON | 0.050 V / 0.25 V / 6 V | |
Ohms measurement | Range | 4 kΩ / 40 kΩ / 400 kΩ |
Resolution | 0.1 Ω / 1 Ω / 10 Ω / 100 Ω | |
Accuracy | 1.5% + 5 digits | |
Continuity beeper | On at ≤ 30 Ω Off at ≥ 100 Ω |
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Frequency measurement | Measurement range | 5.0 Hz to 1 kHz |
Resolution | 0.1 Hz (15 Hz to 399.9 Hz); 1 Hz (400 Hz to 1 kHz) | |
Accuracy – 5.0 Hz to 100 Hz | 0.2% + 2 counts | |
Accuracy – 100.1 Hz to 1 kHz | 0.5% + 5 counts | |
Trigger level | Refer to current and voltage tables | |
1. Add 2% to error spec for CF > 2 | ||
General Specifications | ||
Batteries | Six 1.5 V AA NEDA 15 A or IEC LR6 | |
Battery life (with typical usage, backlight off) | 100 hours | |
Test leads | Rated to 1000 V | |
Weight | .814 kg (1.8 lb) | |
Jaw size | 58 mm (2.28 in) | |
Dimensions (L x W x D) | 300 x 98 x 52 mm (12 x 3.75 x 2 in) | |
Safety rating | IEC 61010-2-032, 600 V CAT IV, 1000 V CAT III | |
Environmental Specifications | ||
Operating temperature | 32°F to +122°F (0°C to +50°C) | |
Storage temperature | -4°F to 140°F (-20°C to +60°C) | |
Operating humidity | 0 to 95% (non-condensing) | |
Operating altitude | 2000 m | |
Storage altitude | 10,000 m | |
IP rating | 42 (indoor use only) | |
Drop test requirements | 1 m | |
EMI, RFI, EMC | FCC part 15, IEC/EN 61326-1:1997 class B IEC/EN 61326:1997 3 V/m, performance criteria B, EN61325 |
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Temperature coefficients | Current | 0.1% of reading per °C outside 22°C to 24°C |
Voltage | 0.1% of reading per °C outside 22°C to 24°C |