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

  • Double Clamp Meter | Fluke 381 True-RMS Clamp Meter | Fluke
  • Double Clamp Meter | Fluke 381 True-RMS Clamp Meter | Fluke
  • Double Clamp Meter | Fluke 381 True-RMS Clamp Meter | Fluke
  • Double Clamp Meter | Fluke 381 True-RMS Clamp Meter | Fluke

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

Award winner
Fluke 381 Remote Display True RMS AC/DC Clamp Meter with iFlex® is rated 4.2 out of 5 by 25.
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Product overview

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.

Models

Fluke 381
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

Specifications

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
Flexible current probe 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

Resources

Rated 1 out of 5 by from flex clamp does not do DC amps sucks need to make a product that does DC amps also with the flex amp contraption
Date published: 2018-04-19
Rated 5 out of 5 by from test it was a useful product and that is why i am writing about it
Date published: 2017-03-30
Rated 5 out of 5 by from My most treasured possession I love my Fluke 381 more than my own children (kidding, I don't have kids). I use it daily in my work on boats, both for AC and DC. I never doubt the readings, and the remote display makes me the coolest tech on the dock. It gets borrowed often because it's so awesome. I can clamp the starter or alternator in the engine room, and take the remote display to the helm (except on the REALLY big boats). What usually takes two technicians, I can accomplish myself with my Fluke 381. My Fluke should get it's own paycheck. My only complaint is I really wish the iFlex did DC amperage. And I wish it were a little smaller. Unlike some other reviewers, I must be lucky because I don't think the battery consumption is bad. I replace them maybe every 2 months, and I use it on a daily basis.
Date published: 2016-12-13
Rated 5 out of 5 by from Another awesome Fluke Product I really enjoy using this clamp meter. I am in the industrial field and use the iflex to calibrate compressors. Without the iFlex, it would be impossible to get a meter around the motor leads inside the motor peckerhead.
Date published: 2016-12-12
Rated 5 out of 5 by from Better than having an apprentice! Way easier than yelling measurements at one another from across the room. No need to tie up another guy to watch the meter while you make changes. No need to walk back and forth to check your measurements. The wireless screen has been invaluable on the work site and at home. It's not just the convenience, but also the safety factor especially when working on suspect circuits. This is even more true in my industry working transmission protection equipment.
Date published: 2016-12-10
Rated 5 out of 5 by from Great Meter. I have several Fluke meters. This new 381 meter is very safe to use especially around bus bars. I use this meter for all my electrical testing now. The remote function is a great feature. Overall a great meter.
Date published: 2016-12-09
Rated 5 out of 5 by from 381 works great 1 year later the 381 remote clamp is the way to go. I have been using it on and off for over a year now with NO problems (I still am using original batteries) so I guess fluke fixed the power problem from 2 years ago. Great meter !! for ac and dc.
Date published: 2016-12-09
Rated 5 out of 5 by from Excellent tool for performing electrical panel PM This meter is a perfect fit for performing our annual electrical panel PMs. We are required to take readings on live circuits with our Arc Flash gear on. The removable remote readout screen is perfect for this work. It helps keep the recording tech out of the arc flash boundary and helps speed the recording of loads on the individual circuits.
Date published: 2016-12-08
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