374 FC/375 FC/376 FC Clamp Meter PN 4705494 September 2015 © 2015 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
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. Resellers are not authorized to extend any other warranty on Fluke’s behalf.
Table of Contents Title Page Introduction ................................................................................................................. Contact Fluke ............................................................................................................. Safety Information ...................................................................................................... Replacement Part List ......................................................................................
374 FC/375 FC/376 FC Users Manual ii
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 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.
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 • Japan: +81-3-6714-3114 • Singapore: +65-6799-5566 • Anywhere in the world: +1-425-446-5500 Or, visit Fluke's website at www.fluke.com. To register your product, visit http://register.fluke.com.
Clamp Meters Safety Information Safety Information A Warning identifies conditions and procedures that are dangerous to the user. A Caution identifies conditions and procedures that can cause damage to the Product or the equipment under test. Symbols used on the Product and in this manual are explained 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.
374 FC/375 FC/376 FC Users Manual • Do not exceed the Measurement Category (CAT) rating of the lowest rated individual component of a Product, probe, or accessory. • Comply with local and national safety codes. Use personal protective equipment (approved rubber gloves, face protection, and flame-resistant clothes) to prevent shock and arc blast injury where hazardous live conductors are exposed. • Before each use, examine the Product.
Clamp Meters Safety Information • Connect the common test lead before the live test lead and remove the live test lead before the common test lead. • Remove all probes, test leads, and accessories before the battery door is opened. • Keep fingers behind the finger guards on the probes. • Hold the Product behind the tactile barrier. • Replace the batteries when the low battery indicator shows to prevent incorrect measurements. • Do not use the HOLD function to measure unknown potentials.
374 FC/375 FC/376 FC Users Manual For safe operation and maintenance of the Product: • Repair the Product before use if the battery leaks. • Have an approved technician repair the Product. 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. Do not use abrasives or solvents.
Clamp Meters Safety Information Table 1. Symbols Symbol Meaning Symbol Meaning AC (Alternating Current) Earth DC (Direct Current) X WARNING. HAZARDOUS VOLTAGE. Risk of electric shock. P Conforms to European Union directives. W WARNING. RISK OF DANGER. Consult user documentation. Battery. Low battery when shown on display. T Double Insulated Certified by TÜV SÜD Product Service. - Do not apply to or remove from HAZARDOUS LIVE conductors.
374 FC/375 FC/376 FC Users Manual Table 1. Symbols (Cont.) 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. ~ 8 Conforms to relevant Australian EMC standards. Symbol ) Meaning Measurement Category IV is applicable to test and measuring circuits connected at the source of the building’s low-voltage MAINS installation.
Clamp Meters Replacement Part List Replacement Part List Table 2 lists the available replacement parts. Table 2. Replacement Parts Item Battery, AA 1.5 V Qty.
374 FC/375 FC/376 FC Users Manual The Product Clamp Meter fig01.
Clamp Meters The Product Auto Power Off Backlight 20 ON ON fig02_3.
374 FC/375 FC/376 FC Users Manual Display Hold MIN MAX AVG = 1x = 2x = 3x 2 sec = Exit fig04_5.
Clamp Meters The Product LOG (375 FC and 376 FC) Clear Memory (375 FC and 376 FC) + ON + 2 sec = LOG x1 x2 5 sec fig_16.
374 FC/375 FC/376 FC Users Manual Flexible Current Probe 1 2 3 <0.5 A >0.5 A fig06.
Clamp Meters The Product Hz (375 FC & 376 FC) Jaw >5A > 20 A 1 <0.5 A >0.5 A 2 fig07.
374 FC/375 FC/376 FC Users Manual 3 1 <0.5 A >0.5 A 2 Fig08.
Clamp Meters The Product mV dc (375 FC & 376 FC) fig09_10.
374 FC/375 FC/376 FC Users Manual ON e R <30 Fig15.
Clamp Meters The Product On Off 3 100 ms 1 2 4 fig13_14.
374 FC/375 FC/376 FC Users Manual 3 1 2 fig11_12.
Clamp Meters The Product FC Module Fluke ConnectTM Bluetooth® Connection to FC Tools 1 SAVE Fluke Connect TM 2 Connect 3 4 SAVE CAPTURE 5 6 Go to www.flukeconnect.com flukeconnect.
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 .................................
Clamp Meters Specifications Safety ...................................................... IEC 61010-1, Pollution Degree 2 IEC 61010-2-032: CAT III 1000V / CAT IV 600V IEC 61010-2-033: CAT III 1000V / CAT IV 600V Intrusion Protection (IP) Rating ............... IEC 60529: IP30 Radio Frequency Certification................. FCC ID:T68-FBLE IC:6627A-FBLE Wireless Radio Frequency Range .......... 2412 MHz to 2462 MHz Output Power ..........................................
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.
Clamp Meters Specifications AC Current via Flexible Current Probe Range .................................................... 2500 A Resolution ............................................... 0.1 A (≤999.9 A) 1 A (≤2500 A) Accuracy ................................................. 3 % ±5 digits (5 to 500 Hz) Crest Factor (50 Hz/60 Hz) ..................... 3.0 @ 1100 A 2.5 @ 1400 A 1.42 @ 2500 A Add 2 % for C.F.
374 FC/375 FC/376 FC Users Manual Position Sensitivity A B C ghn12.eps Figure 1.
Clamp Meters Specifications Distance from Optimum i2500-10 Flex i2500-18 Flex Error 1.4 in (35.6 mm) ±0.5 % 0.8 in (20.3 mm) 2.0 in (50.8 mm) ±1.0 % 1.4 in (35.6 mm) 2.5 in (63.5 mm) ±2.0 % A 0.5 in (12.7 mm) B C 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 .........................................
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 ........................................
Clamp Meters Specifications Frequency via Jaw Range 375 FC and 376 FC ........................... 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 375 FC and 376 FC ............................. 5.0 Hz to 500.0 Hz Resolution ........
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 .....................................................
