Fluke 355

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Fluke 355

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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
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
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
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
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
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
Continuity beeper (355 only)
On at ≤ 30 Ω
Off at ≥ 100 Ω
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
*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 (LxWxD)
300 mm x 98 mm x 52 mm (12 in x 3.75 in x 2 in)
Safety rating
IEC 61010-2-032, 600 V CAT IV, 1000 V CAT III
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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 3V/m, performance criteria B, EN61325
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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