User Manual
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All product names are subject to change without notice. All rights reserved. Specifications are trademarks of their respective companies. 374 FC/375 FC/376 FC Clamp Meter PN 4705494 September 2015 © 2015 Fluke Corporation.
All product names are subject to change without notice. All rights reserved. Specifications are trademarks of their respective companies. 374 FC/375 FC/376 FC Clamp Meter PN 4705494 September 2015 © 2015 Fluke Corporation.
User Manual
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... of the problem. Box 9090 P.O. LIMITED WARRANTY AND LIMITATION OF LIABILITY This Fluke product will be free from defects in material and workmanship for three years from accident, neglect, misuse, alteration, contamination, or abnormal conditions of operation or handling. Fluke Corporation Fluke Europe B.V. Resellers are not authorized to you. This warranty does not cover fuses, disposable batteries, or...
... of the problem. Box 9090 P.O. LIMITED WARRANTY AND LIMITATION OF LIABILITY This Fluke product will be free from defects in material and workmanship for three years from accident, neglect, misuse, alteration, contamination, or abnormal conditions of operation or handling. Fluke Corporation Fluke Europe B.V. Resellers are not authorized to you. This warranty does not cover fuses, disposable batteries, or...
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The illustrations in this manual show the 376 FC. 1 The Flexible Current Probe provides increased display flexibility and allows measurements of awkward sized conductors and improved wire access. The 375 FC and 376 FC also measure frequency and dc millivolts. The detachable iFlex (Flexible Current Probe) that is included with the 376 FC (optional with the 374 FC and 375 FC) expands the measurement range to 2500 A ac. Introduction The Fluke 374 FC/375 FC/376 FC (the Product) measures true-rms ac current and voltage, dc current and voltage, inrush current, resistance, and capacitance.
The illustrations in this manual show the 376 FC. 1 The Flexible Current Probe provides increased display flexibility and allows measurements of awkward sized conductors and improved wire access. The 375 FC and 376 FC also measure frequency and dc millivolts. The detachable iFlex (Flexible Current Probe) that is included with the 376 FC (optional with the 374 FC and 375 FC) expands the measurement range to 2500 A ac. Introduction The Fluke 374 FC/375 FC/376 FC (the Product) measures true-rms ac current and voltage, dc current and voltage, inrush current, resistance, and capacitance.
User Manual
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To see, print, or download the latest manual supplement, visit http://us.fluke.com/usen/support/manuals. 2 374 FC/375 FC/376 FC Users Manual 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...
To see, print, or download the latest manual supplement, visit http://us.fluke.com/usen/support/manuals. 2 374 FC/375 FC/376 FC Users Manual 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...
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.... • Do not use the Product. • Use the Product only as specified, or the protection supplied by the Product can cause damage to the user. A Caution identifies conditions and procedures that are explained in this manual are dangerous to the Product... or the equipment under test. Symbols used on the Product and in Table 1. XWWarning To prevent possible electrical shock, fire, or personal injury: • Carefully read all instructions. • Read all safety information before you use the Product if it operates incorrectly. • Use...
.... • Do not use the Product. • Use the Product only as specified, or the protection supplied by the Product can cause damage to the user. A Caution identifies conditions and procedures that are explained in this manual are dangerous to the Product... or the equipment under test. Symbols used on the Product and in Table 1. XWWarning To prevent possible electrical shock, fire, or personal injury: • Carefully read all instructions. • Read all safety information before you use the Product if it operates incorrectly. • Use...
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... and national safety codes. Examine the test leads for loose or weakened components. Carefully examine the insulation around the jaws. • Do not use , examine the Product. 374 FC/375 FC/376 FC Users Manual • Do not exceed the Measurement Category (CAT) rating of the lowest rated individual component of the clamp housing or output cable insulation. Use personal protective...
... and national safety codes. Examine the test leads for loose or weakened components. Carefully examine the insulation around the jaws. • Do not use , examine the Product. 374 FC/375 FC/376 FC Users Manual • Do not exceed the Measurement Category (CAT) rating of the lowest rated individual component of the clamp housing or output cable insulation. Use personal protective...
User Manual
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... finger guards on , the display does not change when a different potential is measured. • Disconnect power and discharge all high-voltage capacitors before you measure resistance, continuity, capacitance, or a diode junction. • Remove the input signals before you clean the Product. • Use only specified replacement parts. • When batteries are changed, ensure that the calibration seal in CAT III or...
... finger guards on , the display does not change when a different potential is measured. • Disconnect power and discharge all high-voltage capacitors before you measure resistance, continuity, capacitance, or a diode junction. • Remove the input signals before you clean the Product. • Use only specified replacement parts. • When batteries are changed, ensure that the calibration seal in CAT III or...
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... the Product: • Repair the Product before use abrasives or solvents. WCaution To avoid possible damage to the Product 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. 374 FC/375 FC/376 FC Users Manual For safe operation and maintenance of...
... the Product: • Repair the Product before use abrasives or solvents. WCaution To avoid possible damage to the Product 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. 374 FC/375 FC/376 FC Users Manual For safe operation and maintenance of...
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... measures. 7 HAZARDOUS LIVE conductors. Low battery when shown on display. Do not apply to European Union directives. Consult user documentation. Symbols Symbol Meaning AC (Alternating Current) DC (Direct Current) P Conforms to or remove from uninsulated hazardous live conductors without taking , Application around and removal from - Risk of electric shock. Clamp Meters Safety Information Table 1.
... measures. 7 HAZARDOUS LIVE conductors. Low battery when shown on display. Do not apply to European Union directives. Consult user documentation. Symbols Symbol Meaning AC (Alternating Current) DC (Direct Current) P Conforms to or remove from uninsulated hazardous live conductors without taking , Application around and removal from - Risk of electric shock. Clamp Meters Safety Information Table 1.
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374 FC/375 FC/376 FC Users Manual Table 1. The affixed label indicates that you must not discard this product is applicable to the equipment types in the WEEE Directive Annex I, this electrical/electronic product in domestic ~ household waste. Product Category: With reference to test and measuring circuits connected... Symbol Meaning Measurement Category III is applicable to test and measuring circuits connected to the distribution part of the building's low-voltage MAINS installation. Measurement Category IV is classed as unsorted municipal waste. 8
374 FC/375 FC/376 FC Users Manual Table 1. The affixed label indicates that you must not discard this product is applicable to the equipment types in the WEEE Directive Annex I, this electrical/electronic product in domestic ~ household waste. Product Category: With reference to test and measuring circuits connected... Symbol Meaning Measurement Category III is applicable to test and measuring circuits connected to the distribution part of the building's low-voltage MAINS installation. Measurement Category IV is classed as unsorted municipal waste. 8
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Replacement Parts Item Qty. Table 2. Clamp Meters Replacement Part List Replacement Part List Table 2 lists the available replacement parts. Fluke Part or Model Number Battery, AA 1.5 V Battery Door Assembly Test lead set Flexible current probe i2500-10 Flexible current probe i2500-18 Magnet strap STRAP 9 INCHES Soft Case 2 376756 1 4696918 1 TL75 1 3676410 1 3798105 1 669952 1 669960 1 3752958 9
Replacement Parts Item Qty. Table 2. Clamp Meters Replacement Part List Replacement Part List Table 2 lists the available replacement parts. Fluke Part or Model Number Battery, AA 1.5 V Battery Door Assembly Test lead set Flexible current probe i2500-10 Flexible current probe i2500-18 Magnet strap STRAP 9 INCHES Soft Case 2 376756 1 4696918 1 TL75 1 3676410 1 3798105 1 669952 1 669960 1 3752958 9
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374 FC/375 FC/376 FC Users Manual Display Hold 12 MIN MAX AVG = 1x = 2x = 3x 2 sec = Exit fig04_5.eps
374 FC/375 FC/376 FC Users Manual Display Hold 12 MIN MAX AVG = 1x = 2x = 3x 2 sec = Exit fig04_5.eps
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374 FC/375 FC/376 FC Users Manual Specifications Maximum voltage between any Terminal and Earth Ground 1000 V Batteries 2 AA, NEDA 15A, IEC LR6 Operating Temperature 10 °C to +50 °C Storage Temperature 40 °C to +60 °C Operating Humidity Non condensing (
374 FC/375 FC/376 FC Users Manual Specifications Maximum voltage between any Terminal and Earth Ground 1000 V Batteries 2 AA, NEDA 15A, IEC LR6 Operating Temperature 10 °C to +50 °C Storage Temperature 40 °C to +60 °C Operating Humidity Non condensing (
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... (IP) Rating IEC 60529: IP30 Radio Frequency Certification FCC ID:T68-FBLE IC:6627A-FBLE Wireless Radio Frequency Range .......... 2412 MHz to a test object. 23 Class A: Equipment is necessary for domestic purposes. There may be potential difficulties in ensuring electromagnetic compatibility in all establishments other environments due to a low-voltage power supply network that supplies buildings used for the internal function of...
... (IP) Rating IEC 60529: IP30 Radio Frequency Certification FCC ID:T68-FBLE IC:6627A-FBLE Wireless Radio Frequency Range .......... 2412 MHz to a test object. 23 Class A: Equipment is necessary for domestic purposes. There may be potential difficulties in ensuring electromagnetic compatibility in all establishments other environments due to a low-voltage power supply network that supplies buildings used for the internal function of...
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374 FC/375 FC/376 FC Users Manual 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 FC and 375 FC 600.0 A 376 FC 999.9 A Resolution 0.1 A Accuracy 2 % ±5 digits (10 Hz to 100 Hz) 2.5 % ±5 digits (100 to 500 Hz) Crest Factor (50 Hz/60 Hz) 376 FC 3 @ 500 A 2.5 @ 600 A 1.42 @ 1000 A 374 FC and 375 FC 2.5 @ 350 A 1.42 @ 600 A Note: Add 2 % for C.F. >2 24
374 FC/375 FC/376 FC Users Manual 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 FC and 375 FC 600.0 A 376 FC 999.9 A Resolution 0.1 A Accuracy 2 % ±5 digits (10 Hz to 100 Hz) 2.5 % ±5 digits (100 to 500 Hz) Crest Factor (50 Hz/60 Hz) 376 FC 3 @ 500 A 2.5 @ 600 A 1.42 @ 1000 A 374 FC and 375 FC 2.5 @ 350 A 1.42 @ 600 A Note: Add 2 % for C.F. >2 24
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374 FC/375 FC/376 FC Users Manual Position Sensitivity A B C Figure 1. Position Sensitivity ghn12.eps 26
374 FC/375 FC/376 FC Users Manual Position Sensitivity A B C Figure 1. Position Sensitivity ghn12.eps 26
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Clamp Meters Specifications 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 374 FC and 375 FC 600.0 A 376 FC 999.9 A Resolution 0.1 A Accuracy 2 % ±5 digits 27
Clamp Meters Specifications 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 374 FC and 375 FC 600.0 A 376 FC 999.9 A Resolution 0.1 A Accuracy 2 % ±5 digits 27
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374 FC/375 FC/376 FC Users Manual AC Voltage Range 1000 V Resolution 0.1 V (≤600.0 V) 1 V (≤1000 V) Accuracy 1.5 % ±5 digits (20 Hz to 500 Hz) DC Voltage Range 1000 V Resolution 0.1 V (≤600.0 V) 1 V (≤1000 V) Accuracy 1 % ±5 digits mV dc (375 FC and 376 FC) Range 500.0 mV Resolution 0.1 mV Accuracy 1 % ±5 digits 28
374 FC/375 FC/376 FC Users Manual AC Voltage Range 1000 V Resolution 0.1 V (≤600.0 V) 1 V (≤1000 V) Accuracy 1.5 % ±5 digits (20 Hz to 500 Hz) DC Voltage Range 1000 V Resolution 0.1 V (≤600.0 V) 1 V (≤1000 V) Accuracy 1 % ±5 digits mV dc (375 FC and 376 FC) Range 500.0 mV Resolution 0.1 mV Accuracy 1 % ±5 digits 28
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374 FC/375 FC/376 FC Users Manual Resistance Range 374 FC 6000 Ω 375 FC and 376 FC 60 kΩ Resolution 374 FC 0.1 Ω (≤600 Ω) 1 Ω (≤6000 Ω) 375 FC and 376 FC 0.1 Ω (≤600 Ω) 1 Ω (≤6000 Ω) 10 Ω (≤60 kΩ) Accuracy 1 % ±5 digits Capacitance Range 1000 μF Resolution 0.1 μF (≤100 μF) 1 μF (≤1000 μF) Accuracy 1 % ±4 digits 30
374 FC/375 FC/376 FC Users Manual Resistance Range 374 FC 6000 Ω 375 FC and 376 FC 60 kΩ Resolution 374 FC 0.1 Ω (≤600 Ω) 1 Ω (≤6000 Ω) 375 FC and 376 FC 0.1 Ω (≤600 Ω) 1 Ω (≤6000 Ω) 10 Ω (≤60 kΩ) Accuracy 1 % ±5 digits Capacitance Range 1000 μF Resolution 0.1 μF (≤100 μF) 1 μF (≤1000 μF) Accuracy 1 % ±4 digits 30