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Fluke 374 User Manual
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Fluke 374 User Manual

Clamp meter
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374/375
376/376-II
Clamp Meter
PN 3608883
July 2010 Rev. 1, 3/23
© 2010-2013 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.

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Summary of Contents for Fluke 374

  • Page 1 374/375 376/376-II Clamp Meter PN 3608883 July 2010 Rev. 1, 3/23 © 2010-2013 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
  • Page 2 The Fluke 374/375/376 products will be free from defects in material and workmanship for 3 years from the date of purchase. The Fluke 376-II product will be free from defects in material and workmanship for 5 years from the date of purchase. This...

  • Page 3: Table Of Contents

    Table of Contents Title Page Introduction ......................1 Contact Fluke ......................2 Safety Information ....................2 The Meter ........................ 8 Specifications ......................18 General Specifications ..................18 Accuracy Specifications ..................20...
  • Page 4 374/375/376/376-II Users Manual...

  • Page 5: Introduction

    The detachable iFlex (Flexible Current Probe) that is included with the 376/376-II (optional with the 374/375) expands the measurement range to 2500 A ac. The Flexible Current Probe provides increased display flexibility and allows measurements of awkward sized conductors and improved wire access.

  • Page 6: Contact Fluke

    374/375/376/376-II Users Manual Contact Fluke Fluke Corporation operates worldwide. For local contact information, go to our website: www.fluke.com To register your product, or to view, print, or download the latest manual or manual supplement, go to our website: www.fluke.com/productinfo. +1-425-446-5500 fluke-info@fluke.com...
  • Page 7 Clamp Meters Safety Information Warning To prevent possible electrical shock or personal injury, follow these guidelines: Use the Meter only as specified in this manual or the protection provided by the • Meter can be compromised. Examine the case before you use the Meter. Look for cracks or missing plastic. •...
  • Page 8 When batteries are changed, ensure that the calibration seal in the battery • compartment is not damaged. If damaged, the Meter may not be safe to use. Return the Meter to Fluke for replacement of the seal. When servicing the Meter, use only specified replacement parts. •...
  • Page 9 Disconnect circuit power and discharge all high-voltage capacitors before you • measure resistance, continuity, or capacitance. For the 374 and 375, do not measure ac/dc current in circuits carrying more than • 1000 V or 600 A with the Meter Jaw.
  • Page 10 374/375/376/376-II Users Manual Caution To avoid possible damage to the Meter or to equipment under test: Use the proper jacks, function, and range for the measurement application. • Clean the case and accessories with a damp cloth and mild detergent only.
  • Page 11 Do not dispose of this product as unsorted municipal waste. For information about take-back and recycling programs available in your country, see the Fluke website. Note The Measurement Category (CAT) and voltage rating of any combination of test probe, test probe accessory, current clamp accessory, and the Meter is the LOWEST rating of any individual component.

  • Page 12: The Meter

    374/375/376/376-II Users Manual The Meter Clamp Meter fig01.eps...
  • Page 13 Clamp Meters The Meter Auto Power Off Backlight fig02_3.eps...
  • Page 14 374/375/376/376-II Users Manual Display Hold MIN MAX AVG 2 sec = Exit fig04_5.eps...
  • Page 15 Clamp Meters The Meter Flexible Current Probe <0.5 A >0.5 A fig06.eps...
  • Page 16 374/375/376/376-II Users Manual (375/376/376-II) <0.5 A >0.5 A Fig07.eps...
  • Page 17 Clamp Meters The Meter <0.5 A Fig08.eps...
  • Page 18 374/375/376/376-II Users Manual dc (375/376/376-II) fig09_10.eps...
  • Page 19 Clamp Meters The Meter <30 Fig15.eps...
  • Page 20 374/375/376/376-II Users Manual 100 ms fig13_14.eps...
  • Page 21 Clamp Meters The Meter fig11_12.eps...

  • Page 22: Specifications

    374/375/376/376-II Users Manual Specifications General Specifications Maximum voltage between any terminal and earth ground ........1000 V Size (L x W x H) ........246 mm x 83 m x 43 mm Weight ........... 388 g Jaw Opening .......... 34 mm Flexible Current Probe Diameter ....
  • Page 23 Clamp Meters Specifications Batteries ..........2 AA, IEC LR6 Ingress Protection (IP) Rating ....IEC 60529: IP30 Safety ............ IEC 61010-1 Pollution Degree 2 IEC 61010-2-032: CAT III 1000 V/CAT IV 600 V Electromagnetic Compatibility (EMC) International......... IEC 61326-1: Portable Electromagnetic Environment CISPR 11: Group 1, Class A Group 1: Equipment has intentionally generated and/or uses conductively-coupled radio frequency energy that is necessary for the internal function of the equipment...

  • Page 24: Accuracy Specifications

    Temperature Coefficients ....... Add 0.1 x specified accuracy for each degree C above 28 °C or below 18 °C AC Current via Jaw Range 374/375 ..........600.0 A 376/376-II ......... 999.9 A Resolution ..........0.1 A Accuracy ..........2 % ±5 digits (10 Hz to100 Hz)
  • Page 25 Add 2 % for C.F. >2 AC Current via Flexible Current Probe Range............ 2500 A Resolution 374/375 ..........0.1 A (≤600 A) 1 A (≤2500 A) 376/376-II........... 0.1 A (≤999.9 A) 1 A (≤2500 A) Accuracy ..........3 % ±5 digits (5 Hz to 500 Hz) Crest Factor (50/60 Hz) ......
  • Page 26 374/375/376/376-II Users Manual Position Sensitivity ghn12.eps Figure 1. Position Sensitivity...
  • Page 27 Measurement uncertainty assumes centralized primary conductor at optimum position, no external electrical or magnetic field, and within operating temperature range. DC Current Range 374/375 ..........600.0 A 376/376-II ......... 999.9 A Resolution ..........0.1 A Accuracy ..........2 % ±5 digits...
  • Page 28 374/375/376/376-II Users Manual Resolution 374/375 ..........0.1 V 376/376-II ........... 0.1 V (≤600.0 V) 1 V (≤1000 V) Accuracy ..........1.5 % ±5 digits (20 Hz to 500 Hz) DC Voltage Range 374/375 ..........600.0 V 376/376-II ........... 1000 V Resolution 374/375 ..........
  • Page 29 Clamp Meters Specifications Frequency via Jaw Range 375/376/376-II ........5.0 Hz to 500.0 Hz Resolution ..........0.1 Hz Accuracy ..........0.5 % ±5 digits Trigger Level ......... 5 Hz to 10 Hz, ≥10 A 10 Hz to 100 Hz, ≥5 A 100 Hz to 500 Hz, ≥10 A Frequency via Flexible Current Probe Range...
  • Page 30 Resistance Range 374 ........... 6000 Ω 375/376/376-II ........60 kΩ Resolution 374 ........... 0.1 Ω (≤600 Ω) 1 Ω (≤6000 Ω) 375/376/376-II ........0.1 Ω (≤600 Ω) 1 Ω (≤6000 Ω) 10 Ω (≤60 kΩ) Accuracy ..........1 % ±5 digits Capacitance Range ............

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375376376-ii