Versatile and rugged tools for applications with high currents
Confidently take reliable readings with the True-rms, Fluke 355 and 353 digital clamp meters; the tools 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.
- Reliably handle a wide range of high-current applications with 2000 A ac + dc true-rms, 1400 A ac, and 2000 A dc
- The large 58 mm (2.3 in) jaw capacity is suitable for large or multiple conductors
- CAT IV 600 V, CAT III 1000 V rating for added user protection
- In-rush current measurement captures ‘power-on’ surge current with accuracy and repeatability
- High voltage measurement of 1000 V ac + dc true-rms, 600 V ac, and 1000 V dc allows the user to perform multiple tests with only one tool (355 only)
- Resistance to 400K ohms coupled with a continuity beeper provide the convenience of a multimeter in a clamp meter. (355 only)
- Accurately measure frequency up to 1 kHz for optimum troubleshooting
- Quickly analyze readings using the MIN, MAX, and AVG functions
- A large backlit display allows for easy visibility in low-lit areas
- Use the display hold feature to capture readings even when the display cannot be viewed
- Use the low-pass filter to smooth out noisy loads and stabilize readings
Electrical specifications |
Current measurement dc and ac 10 Hz to 100 Hz |
Range : 40 A |
Resolution: 10 mA
Accuracy, A: 1.5 % rdg + 15 digits
Trigger Level for Inrush: 0.50 A
Trigger Level for Hz Filter OFF: 2.50 A
Trigger Level for Hz Filter ON: 0.50 A |
Range : 400 A |
Resolution: 100 mA
Accuracy, A: 1.5 % rdg + 5 digits
Trigger Level for Inrush: 5.0 A
Trigger Level for Hz Filter OFF: 2.5 A
Trigger Level for Hz Filter ON: 2.5 A |
Range : 2000 A; 1400 ac rms |
Resolution: 1 A
Accuracy, A: 1.5 % rdg + 5 digits
Trigger Level for Inrush: 5 A
Trigger Level for Hz Filter OFF: 8 A
Trigger Level for Hz Filter ON: 8 A |
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Crest Factor (50/60 Hz) |
Range : 40 A |
Crest Factor* : 2 @ 33 A, 2.4 @ 27 A |
Range : 400 A |
Crest Factor* : 2 @ 330 A, 2.4 @ 270 A |
Range : 2000 A; 1400 ac rms |
Crest Factor* : 2 @ 1000 A, 2.4 @ 833 A |
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Current measurement ac 100.1 Hz to 1 kHz |
Range : 40 A |
Resolution: 10 mA
Accuracy > 10 A : 3.5 % rdg + 15 digits
Trigger Level for Inrush: 0.50 A
Trigger Level for Hz Filter OFF : 2.50 A
Trigger Level for Hz Filter ON : 0.50 A |
Range : 400 A |
Resolution: 100 mA
Accuracy > 10 A : 3.5 % rdg + 5 digits
Trigger Level for Inrush: 5.0 A
Trigger Level for Hz Filter OFF : 2.5 A
Trigger Level for Hz Filter ON : 2.5 A |
Range : 2000 A; 1400 ac rms |
Resolution: 1 A
Accuracy > 10 A : 3.5 % rdg + 5 digits
Trigger Level for Inrush: 5 A
Trigger Level for Hz Filter OFF : 8 A
Trigger Level for Hz Filter ON : 8 A |
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Voltage measurement (355 only) 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 |
Resolution: 1 mV
Accuracy: 1 % rdg + 10 digits
Trigger Level for Hz Filter OFF: 0.050 V
Trigger Level for Hz Filter ON: 0.050 V |
Range : 40 V |
Resolution: 10 mV
Accuracy: 1 % rdg + 5 digits
Trigger Level for Hz Filter OFF: 0.25 V
Trigger Level for Hz Filter ON: 0.25 V |
Range : 400 V |
Resolution: 100 mV
Accuracy: 1 % rdg + 5 digits
Trigger Level for Hz Filter OFF: 6 V
Trigger Level for Hz Filter ON: 6 V |
Range : 600 V ac rms |
Resolution: 1 V
Accuracy: 1 % rdg + 5 digits
Trigger Level for Hz Filter OFF: 6 V
Trigger Level for Hz Filter ON: 6 V |
Range : 1000 V dc |
Resolution: 1 V
Accuracy: 1 % rdg + 5 digits |
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Voltage measurement (355 only) 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 |
Resolution: 1 mV
Accuracy: 3 % rdg + 10 digits
Trigger Level for Hz Filter OFF: 0.050 V
Trigger Level for Hz Filter ON: 0.050 V |
Range: 40 V |
Resolution: 10 mV
Accuracy: 3 % rdg + 5 digits
Trigger Level for Hz Filter OFF: 0.25 V
Trigger Level for Hz Filter ON: 0.25 V |
Range: 400 V |
Resolution: 100 mV
Accuracy: 3 % rdg + 5 digits
Trigger Level for Hz Filter OFF: 6 V
Trigger Level for Hz Filter ON: 6 V |
Range: 600 V ac rms |
Resolution: 1 V
Accuracy: 3 % rdg + 5 digits
Trigger Level for Hz Filter OFF: 6 V
Trigger Level for Hz Filter ON: 6 V |
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Ohms measurement (355 only) |
Range: 400 Ω |
Resolution: 0.1 Ω
Accuracy: 1.5 % + 5 digits |
Range: 4 kΩ |
Resolution: 1 Ω
Accuracy: 1.5 % + 5 digits |
Range: 40 kΩ |
Resolution: 10 Ω
Accuracy: 1.5 % + 5 digits |
Range: 400 kΩ |
Resolution: 100 Ω
Accuracy: 1.5 % + 5 digits |
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Continuity beeper (355 only) |
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On at ≤ 30 Ω |
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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 |
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*Add 2 % to error spec for CF > 2
General specifications |
Batteries |
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Six 1.5 V AA NEDA 15 A or IEC LR6 |
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Battery life (with typical usage, backlight off) |
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Test leads |
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Weight |
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Jaw size |
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Dimensions (LxWxD) |
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300 mm x 98 mm x 52 mm (12 in x 3.75 in x 2 in) |
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Safety rating |
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IEC 61010-2-032, 600 V CAT IV, 1000 V CAT III |
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Environmental specifications |
Operating temperature |
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32 °F to + 122 °F (0 °C to +50 °C) |
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Storage temperature |
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-4 °F to 140 °F (-20 °C to +60 °C) |
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Operating humidity |
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0 to 95 % (non-condensing) |
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Operating altitude |
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Storage altitude |
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IP rating |
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Drop test requirements |
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EMI, RFI, EMC |
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FCC part 15, IEC/EN 61326-1:1997 class B, IEC/EN 61326:1997 3V/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 |
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