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Fluke 381 Remote Display True-rms AC/DC Clamp Meter with iFlex
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Personal Greeting

What Once Took Two People, Now Takes One

Now one technician can do jobs that would otherwise require two people. Clamp the Fluke 381 around a conductor, remove the display and walk across the room to operate controls or remove protective equipment, all while watching real-time readings.

The iFlex® Flexible Current Probe (included) expands the measurement range to 2500 A AC while providing increased display flexibility. With a cord that runs 6 feet, you can finally measure those tight spaces, awkward sized conductors and disorganized wires.

Key features

  • Wireless technology allows the display to be carried up to 30 ft. away from the point of measurement for added flexibility without interference with measurement accuracy
  • The removable magnetic display can be conveniently mounted where it is easily seen
  • iFlex® Flexible Current Probe expands the measurement range to 2500 A AC
  • CAT IV 600 V, CAT III 1000 V
  • Integrated low pass filter and state-of-the-art signal processing allows for use in noisy electrical environments while providing stable readings
  • Proprietary inrush measurement technology to filter out noise and capture motor starting current exactly as the circuit protection sees it
  • Ergonomic design fits in your hand and can be used while wearing protective equipment
  • Radio transmitter automatically sets the correct measurement range so you do not need to change the switch positions while taking a measurement
  • Three-year warranty
  • Soft carrying case

Safety Conformance
IEC/EN 61010-1:2001, 1000V CAT III, 600V CAT IV

Electrical Specifications

AC Current via Jaw

Range

999.9 A

Resolution

0.1 A

Accuracy

2% ± 5 digits (10-100 Hz)

5% ± 5 digits (100-500 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 via Flexible Current Probe

Range

999.9 A / 2500 A (45 Hz – 500 Hz)

Resolution

0.1 A / 1 A

Accuracy

3% ± 5 digits

Crest Factor (50/60 Hz)

3.0 at 1100 A

2.5 at 1400 A

1.42 at 2500 A

Add 2% for C.F. > 2

Position Sensitivity

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 digits

AC Voltage

Range

600 V /1000 V

Resolution

0.1 V / 1 V

Accuracy

1.5% ± 5 digits (20 – 500 Hz)

DC Voltage

Range

600.0 V /1000 V

Resolution

0.1 V / 1 V

Accuracy

1% ± 5 digits

Frequency – Via Jaw

Range

5.0 – 500.0 Hz

Resolution

0.1 Hz

Accuracy

0.5% ± 5 digits

Trigger Level

5 – 10 Hz, ≥ 10 A

10 – 100 Hz, ≥ 5 A

100 – 500 Hz, ≥ 10 A

Frequency via Flexible Current Probe

Range

5.0 to 500.0 Hz

Resolution

0.1 Hz

Accuracy

0.5% ± 5 digits

Trigger Level

5 to 20 Hz, ≥ 25 A

20 to 100 Hz, ≥ 20 A

100 to 500 Hz, ≥ 25 A

Resistance

Range

600 Ω/6 kΩ/60 kΩ

Resolution

0.1 Ω/1 Ω/10 Ω

Accuracy

1% ± 5 digits

Mechanical Specifications

Size (L x W x H)

277 x 88 x 43 mm (55 mm for remote unit)

Weight

350 g

Jaw Opening

34 mm

Flexible Current Probe Diameter

7.5 mm

Flexible Current Probe Cable Length

(head to electronics connector)

1.8 m

Environmental Specifications

Operating Temperature

-10°C to +50°C

Storage Temperature

-40°C to +60°C

Operating Humidity

Non condensing (< 10°C)

≤ 90% RH (at 10°C to 30°C)

≤ 75% RH (at 30°C to 40°C)

≤ 45% RH (at 40°C to 50°C)

(Without Condensation)

Operating Altitude

2,000 meters

Storage Altitude

12,000 meters

EMI, RFI, EMC, RF

EN 61326-1:2006, EN 61326-2-2:2006

ETSI EN 300 328 V1.7.1:2006

ETSI EN 300 489 V1.8.1:2008

FCC Part 15 Subpart C Sections 15.207, 15.209, 15.249

FCCID: T68-F381

RSS-210 IC: 6627A-F381

Temperature Coefficients

Add 0.1 x specified accuracy for each degree C above 28°C or below 18°C

Wireless Frequency

2.4 GHz ISM Band 10 meter range

Safety Compliance

ANSI/ISA S82.02.01:2004

CAN/CSA-C22.2 No. 61010-1-04

IEC/EN 61010-1:2001 to 1000V CAT III, 600V CAT IV.

Double Insulation Clearance

Per IEC 61010-2-032

Double Insulation Creepage

Per IEC 61010-1

Agency Approvals

 

Fluke 381 Remote Display True RMS AC/DC Clamp Meter with iFlex®Includes:

  • 18-inch iFlex®flexible current probe
  • Coated instruction card
  • Safety information sheet
  • Soft carrying case
  • TL75 test leads
  • Five AA Alkaline batteries