Fluke 375 FC, 376 FC User Manual

Page 1
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.
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. Resellers are not authorized to extend any other warranty on Fluke’s behalf. To obtain service during the warranty period, contact your nearest Fluke authorized service center to obtain return authorization information, then send the product to that Service Center with a description of the problem.
THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE IS NOT LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, ARISING FROM ANY CAUSE OR THEORY. Since some states or countries do not allow the exclusion or limitation of an implied warranty or of incidental or consequential damages, this limitation of liability may not apply to you.
Fluke Corporation P.O. Box 9090 Everett, WA 98206-9090 U.S.A.
11/99
Fluke Europe B.V. P.O. Box 1186 5602 BD Eindhoven The Netherlands
Page 3

Table of Contents

Title Page
Introduction ................................................................................................................. 1
Contact Fluke ............................................................................................................. 2
Safety Information ...................................................................................................... 3
Replacement Part List ................................................................................................ 9
The Product ................................................................................................................ 10
Specifications ............................................................................................................. 22
i
Page 4
374 FC/375 FC/376 FC
Users Manual
ii
Page 5

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. The Flexible Current Probe provides increased display flexibility and allows measurements of awkward sized conductors and improved wire access. The illustrations in this manual show the 376 FC.
1
Page 6
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. To see, print, or download the latest manual supplement, visit
http://us.fluke.com/usen/support/manuals.
2
Page 7
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.
Use the Product only as specified, or the protection supplied by the Product can
be compromised.
Do not use the Product around explosive gas, vapor, or in damp or wet environments.
Do not use and disable the Product if it is damaged.
Do not use the Product if it operates incorrectly.
Use only correct measurement category (CAT), voltage, and amperage rated
probes, test leads, and adapters for the measurement.
3
Page 8
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. Look for cracks or missing pieces of the clamp housing or output cable insulation. Also look for loose or weakened components. Carefully examine the insulation around the jaws.
Do not use test leads if they are damaged. Examine the test leads for damaged insulation and measure a known voltage.
Do not touch voltages >30 V ac rms, 42 V ac peak, or 60 V dc.
Do not measure current while the test leads are in the input jacks.
Do not apply more than the rated voltage, between the terminals or between each
terminal and earth ground.
De-energize the circuit or wear personal protective equipment in compliance with local requirements before you apply or remove the Flexible Current Probe.
Measure a known voltage first to make sure that the Product operates correctly.
Limit operation to the specified measurement category, voltage, or amperage
ratings.
The battery door must be closed and locked before you operate the Product.
4
Page 9
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. When HOLD is turned 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 the battery
compartment is not damaged. If damaged, the Product may not be safe to use. Return the Product to Fluke for replacement of the seal.
Do not use in CAT III or CAT IV environments without the protective cap of test probe, The protective cap decreases the expose probe metal < 4mm. This decreases the possibility of arc flash from short circuits.
Do not place magnet inside Category IV panel. Place it outside the panel instead.
5
Page 10
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.
Note
The Measurement Category (CAT) and voltage rating of any combination of test probe, test probe accessory, current clamp accessory, and the Product is the LOWEST rating of any individual component.
6
Page 11
Clamp Meters
Safety Information
Table 1. Symbols
Symbol Meaning Symbol Meaning
AC (Alternating Current) Earth DC (Direct Current) X
Conforms to European Union
P
directives.
Consult user documentation.
WARNING. HAZARDOUS VOLTAGE. Risk of electric shock.
W WARNING. RISK OF DANGER.
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. Do not apply around or remove
-
from uninsulated hazardous live conductors without taking additional protective measures.
Application around and removal from uninsulated hazardous live conductors is
,
permitted.
7
Page 12
374 FC/375 FC/376 FC
Users Manual
Table 1. Symbols (Cont.)
Symbol Meaning Symbol Meaning
~
8
Measurement Category III is applicable to test and measuring circuits connected to the distribution part of the building’s low-voltage MAINS installation.
Conforms to relevant Australian EMC standards.
This product complies with the WEEE Directive marking requirements. The affixed label indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE Directive Annex I, this product is classed as category 9 "Monitoring and Control Instrumentation" product. Do not dispose of this product as unsorted municipal waste.
)
Measurement Category IV is applicable to test and measuring circuits connected at the source of the building’s low-voltage MAINS installation.
Certified by CSA Group to North American safety standards.
Page 13
Clamp Meters
Replacement Part List

Replacement Part List

Table 2 lists the available replacement parts.
Table 2. Replacement Parts
Item Qty. Fluke Part or Model Number
Battery, AA 1.5 V 2 376756 Battery Door Assembly 1 4696918 Test lead set 1 TL75 Flexible current probe i2500-10 1 3676410 Flexible current probe i2500-18 1 3798105 Magnet strap 1 669952 STRAP 9 INCHES 1 669960 Soft Case 1 3752958
9
Page 14
374 FC/375 FC/376 FC
Users Manual

The Product

Clamp Meter
10
fig01.eps
Page 15
Clamp Meters
The Product
Auto Power Off Backlight
20
ON
ON
fig02_3.eps
11
Page 16
374 FC/375 FC/376 FC
Users Manual
Display Hold MIN MAX AVG
12
1x
2x
3x
=
=
=
2 sec = Exit
fig04_5.eps
Page 17
Clamp Meters
The Product
LOG
(375 FC and 376 FC)
Clear Memory
+ ON +
(375 FC and 376 FC)
2 sec = LOG
x1 x2
5 sec
fig_16.eps
13
Page 18
374 FC/375 FC/376 FC
Users Manual
Flexible Current Probe
1
14
2
<0.5 A
>0.5 A
3
fig06.eps
Page 19
Clamp Meters
The Product
Hz
Jaw
(375 FC & 376 FC)
1
> 5 A
> 20 A
<0.5 A
>0.5 A
2
fig07.eps
15
Page 20
374 FC/375 FC/376 FC
Users Manual
1
3
16
<0.5 A
>0.5 A
2
Fig08.eps
Page 21
Clamp Meters
The Product
mV dc (375 FC & 376 FC)
fig09_10.eps
17
Page 22
374 FC/375 FC/376 FC
Users Manual
e
18
R
ON
<30
Fig15.eps
Page 23
Clamp Meters
The Product
Off
On
3
100 ms
1
2
4
fig13_14.eps
19
Page 24
374 FC/375 FC/376 FC
Users Manual
1
20
3
2
fig11_12.eps
Page 25
Clamp Meters
The Product
Fluke ConnectTM Bluetooth® Connection to FC Tools
1
Fluke Connect
2
4
5 6
TM
CAPTURE
FC Module
SAVE
Connect
3
SAVE
Go to www.flukeconnect.com
flukeconnect.eps
21
Page 26
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 (<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)
Operating Altitude ................................... 2000 m
Storage Altitude ...................................... 12,000 m
Size (L x W x H) ..................................... 249 mm x 85 mm x 45 mm
Weight ..................................................... 410 g
Jaw Opening ........................................... 34 mm
Flexible Current Probe Diameter ............ 7.5 mm
Flexible Current Probe Cable Length
(head to electronics connector) .............. 1.8 m
22
Page 27
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 .......................................... <100 mW
Electromagnetic Compatibility (EMC)
International ...................................... IEC 61326-1: Portable, Electromagnetic Environment,
Group 1: Equipment has intentionally generated and/or uses conductively-coupled radio frequency energy that is necessary for the internal function of the equipment itself.
Class A: Equipment is suitable for use in all establishments other than domestic and those directly connected to a low-voltage power supply network that supplies buildings used for domestic purposes. There may be potential difficulties in ensuring electromagnetic compatibility in other environments due to conducted and radiated disturbances. Emissions that exceed the levels required by CISPR 11 can occur when the equipment is connected to a test object.
IEC 61326-2-2, CISPR 11: Group 1, Class A
23
Page 28
374 FC/375 FC/376 FC
Users Manual
Temperature Coefficients........................ Add 0.1 x specified accuracy for each degree C above
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
Note: Add 2 % for C.F. >2
24
28 °C or below 18 °C
1.42 @ 600 A
Page 29
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. >2
25
Page 30
374 FC/375 FC/376 FC
Users Manual
Position Sensitivity
26
A
B
C
Figure 1. Position Sensitivity
ghn12.eps
Page 31
Clamp Meters
Specifications
Distance from
Optimum
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
i2500-10 Flex i2500-18 Flex Error
27
Page 32
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
Page 33
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 ............................................... 0.1 Hz
Accuracy ................................................. 0.5 % ±5 digits
Trigger Level ........................................... 5 Hz to 20 Hz, 25 A
20 Hz to 100 Hz, 20 A 100 Hz to 500 Hz, 25 A
29
Page 34
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
Loading...