Fluke 374 User Manual
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Fluke 374 User Manual

Clamp meter
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374/375/376
Users Manual
PN 3608883
July 2010
© 2010 Fluke Corporation. All rights reserved. Printed in China. 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 Users Manual Clamp Meter PN 3608883 July 2010 © 2010 Fluke Corporation. All rights reserved. Printed in China. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
  • Page 2 LIMITED WARRANTY AND LIMITATION OF LIABILITY This Fluke product will be free from defects in material and workmanship for three years from the date of purchase. This warranty does not cover fuses, disposable batteries, or damage from accident, neglect, misuse, alteration, contamination, or abnormal conditions of operation or handling.

  • Page 3: Table Of Contents

    Table of Contents Title Page Introduction......................... 1 How to Contact Fluke ....................2 Safety Information ...................... 3 The Meter ........................9 Specifications ......................19 Electrical Specifications..................19 Mechanical Specifications ..................26 Environmental Specifications ................. 27...
  • Page 4 374, 375, 376 Users Manual...

  • Page 5: Introduction

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

  • Page 6: How To Contact Fluke

    374, 375, 376 Users Manual How to Contact Fluke To contact Fluke, call one of the following telephone numbers: Technical Support USA: 1-800-44-FLUKE (1-800-443-5853) Calibration/Repair USA: 1-888-99-FLUKE (1-888-993-5853) Canada: 1-800-36-FLUKE (1-800-363-5853) Europe: +31 402-675-200 Japan: +81-3-3434-0181 Singapore: +65-738-5655 Anywhere in the world: +1-425-446-5500 Or, visit Fluke's website at www.fluke.com.

  • Page 7: Safety Information

    Clamp Meters Safety Information Safety Information A Warning identifies conditions and actions that pose hazard(s) to the user. A Caution identifies conditions and procedures that could cause Meter damage, equipment under test damage, or permanent loss of data. Symbols used on the Meter and in this manual are explained in Table 1. XWWarning 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...
  • Page 8 374, 375, 376 Users Manual Do not use the Meter around explosive gas, vapor or in damp or wet environments. Use only type AA batteries, properly installed in the Meter case, to power the Meter. When measuring current with the Jaw, keep fingers behind the Tactile Barrier.
  • 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. For the 376, do not measure ac/dc current in circuits carrying more than 1000 V or 1000 A with the Meter Jaw.
  • Page 10 374, 375, 376 Users Manual WCaution 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 Clamp Meters Safety Information Symbol Meaning Symbol Meaning Risk of Danger. Important Conforms to relevant North American information. See Manual. Safety Standards. Battery. Low battery when shown  Double insulated on display. Examined and licensed by TÜV Conforms to relevant Australian ®...
  • Page 12 374, 375, 376 Users Manual Symbol Meaning Symbol Meaning IEC Measurement Category III IEC Measurement Category IV CAT III equipment has protection CAT IV equipment has protection against transients in equipment in against transients from the primary CAT III CAT IV...

  • Page 13: The Meter

    Clamp Meters The Meter The Meter Clamp Meter fig01.eps...
  • Page 14 374, 375, 376 Users Manual Auto Power Off Backlight fig02_3.eps...
  • Page 15 Clamp Meters The Meter Display Hold MIN MAX AVG 2 sec = Exit fig04_5.eps...
  • Page 16 374, 375, 376 Users Manual Flexible Current Probe <0.5 A >0.5 A fig06.eps...
  • Page 17 Clamp Meters The Meter (375 & 376) > 5 A > 20 A >0.5 A <0.5 A Fig07.eps...
  • Page 18 374, 375, 376 Users Manual <0.5 A Fig08.eps...
  • Page 19 Clamp Meters The Meter dc (375 & 376) fig09_10.eps...
  • Page 20 374, 375, 376 Users Manual <30 Fig15.eps...
  • Page 21 Clamp Meters The Meter 100 ms INRUSH fig13_14.eps...
  • Page 22 374, 375, 376 Users Manual fig11_12.eps...

  • Page 23: Specifications

    Clamp Meters Specifications Specifications Electrical Specifications AC Current via Jaw Range 374 and 375 ........600.0 A 376.............999.9 A Resolution ..........0.1 A Accuracy ..........2 % 5 digits (10-100 Hz) 2.5 % 5 digits (100-500 Hz) Crest Factor (50/60 Hz) ......3 @ 500 A (375 and 376 only) 2.5 @ 600 A...
  • Page 24 Users Manual AC Current via Flexible Current Probe Range ............ 2500 A Resolution 374 and 375 ........0.1 A ( 600 A) 1 A ( 2500 A) 376 ............0.1 A ( 999.9 A) 1 A ( 2500 A) Accuracy ..........3 % 5 digits (5 – 500 Hz) Crest Factor (50/60Hz) ......
  • Page 25 Clamp Meters Specifications Position Sensitivity ghn12.eps Figure 1. Position Sensitivity...

  • Page 26: Specifications

    Measurement uncertainty assumes centralized primary conductor at optimum position, no external electrical or magnetic field, and within operating temperature range. DC Current Range 374 and 375 ........600.0 A 376............. 999.9 A Resolution ..........0.1 A Accuracy ..........2 %...
  • Page 27 Clamp Meters Specifications 374 and 375 ........600.0 V 376 ............1000 V Resolution 374 and 375 ........0.1 V 376 ............0.1 V ( 600.0 V) 1 V ( 1000 V) Accuracy ..........1.5 % 5 digits (20 – 500 Hz) DC Voltage Range 374 and 375 ........600.0 V...
  • Page 28 374, 375, 376 Users Manual Resolution 374 and 375 ........0.1 V 376 ............0.1 V ( 600.0 V) 1 V ( 1000 V) Accuracy ..........1 % 5 digits mV dc Range 375 and 376........500.0 mV Resolution ..........0.1 mV Accuracy ..........
  • Page 29 375 and 376 ........5.0 – 500.0 Hz Resolution ..........0.1 Hz Accuracy ..........0.5 % 5 digits Trigger Level ...........5 – 20 Hz, 25 A 20 – 100 Hz, 20 A 100 – 500 Hz, 25 A Resistance Range 374.............6000 375 and 376........60 k...

  • Page 30: Mechanical Specifications

    374, 375, 376 Users Manual Resolution 374............. 0.1 ( 600 ( 6000 375 and 376........0.1 ( 600 ( 6000 ( 60 k ) Accuracy ..........1 % 5 digits Capacitance Range ............. 1000 F Resolution ..........0.1 F ( 100 F) F ( 1000 F) Accuracy ..........

  • Page 31: Environmental Specifications

    Clamp Meters Specifications 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 – +50 C Storage Temp .........-40 C – +60 C Operating Humidity .........Non condensing (< 10 – C) 90 % RH (at 10 C –...
  • Page 32 374, 375, 376 Users Manual Safety Specifications Safety Compliance........CAN/CSA-C22.2 No. 61010-1-04 ANSI/UL 61010-1:2004 ANSI/ISA-61010-1 (82.02.01):2004 EN/IEC 61010-1:2001 to 1000V Measurement Category (CAT) III 600V Measurement Category (CAT) IV Pollution Degree 2 EN/IEC 61010-2-032:2002 EN/IEC 61010-031:2002+A1:2008 ® Agency Approvals ........

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