Fluke 376 FC, 375 FC, 374 FC, 902 FC User Manual

374 FC/375 FC/376 FC/

902 FC

Clamp Meter

Calibration Manual

February 2017 Rev. 1, 9/19

©2017-2019 Fluke Corporation. All rights reserved.

All product names are trademarks of their respective companies.

LIMITED WARRANTY AND LIMITATION OF LIABILITY

Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is three years and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer of a Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in Fluke's opinion, has been misused, altered, neglected, contaminated, or damaged by accident or abnormal conditions of operation or handling. Fluke warrants that software will operate substantially in accordance with its functional specifications for 90 days and that it has been properly recorded on non-defective media.Fluke does not warrant that software will be error free or operate without interruption.

Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price. Fluke reserves the right to invoice Buyer for importation costs of repair/replacement parts when product purchased in one country is submitted for repair in another country. Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair, or replacement of a defective product which is returned to a Fluke authorized service center within the

warranty period.

To obtain warranty service, 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 difficulty postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke determines that failure was caused by neglect, misuse, contamination, alteration, accident, or abnormal condition of operation or handling, including overvoltage failures caused by use outside the product’s specified rating, or normal wear and tear of mechanical components, Fluke will provide an estimate of repair costs and obtain authorization before commencing the work. Following repair, the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges (FOB Shipping Point).

THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY.

Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court or other decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any other provision..

Fluke Corporation	Fluke Europe B.V.	ООО «Флюк СИАЙЭС»
P.O. Box 9090	P.O. Box 1186	125167, г. Москва,
Everett, WA 98206-9090	5602 BD Eindhoven	Ленинградский проспект дом 37,
U.S.A.	The Netherlands	корпус 9, подъезд 4, 1 этаж

11/99

Table of Contents

Title	Page
Introduction .....................................................................................................................................	1
How to Contact Fluke ......................................................................................................................	1
Safety Information ...........................................................................................................................	2
The Product ....................................................................................................................................	4
374 FC/375 FC/376 FC Electrical Specifications ............................................................................	4
AC Current via Jaw ...........................................................................................................	4
AC Current via Flexible Current Probe .............................................................................	4
Position Sensitivity ....................................................................................................	5
DC Current ................................................................................................................	5
AC Voltage ................................................................................................................	5
DC Voltage ................................................................................................................	5
mV dc (375 FC and 376 FC) .....................................................................................	5
Frequency via Jaw ....................................................................................................	6
Frequency via Flexible Current Probe .......................................................................	6
Resistance .................................................................................................................	6
Capacitance ..............................................................................................................	6
902 FC Electrical Specifications .....................................................................................................	6
Mechanical Specifications ................................................................................................	7
Environmental Specifications ...........................................................................................	7
Performance Tests ..........................................................................................................................	8
Calibration Adjustment ....................................................................................................................	9
Calibration Setup ..............................................................................................................	11
VAC Adjustment Procedure ..............................................................................................	12
VDC/mVDC Adjustment Procedure ...........................................................................	13
Ohm/Cap Adjustment Procedure ..............................................................................	13
AAC Adjustment Procedure (374 FC, 375 FC, 376 FC) ...........................................	14
AAC Adjustment Procedure (902 FC) ......................................................................	14
ADC Adjustment Procedure (374 FC, 375 FC, 376 FC) ..........................................	14
uADC Adjustment Procedure (902 FC) .....................................................................	14
ROGO Adjustment Procedure (374 FC, 375 FC, 376 FC) .......................................	15
Temperature Adjustment Procedure (902 FC) .........................................................	15
902 FC Temperature Zero Procedure .......................................................................	15
Maintenance ..................................................................................................................................	15
Clean the Product .............................................................................................................	15
Battery Replacement ........................................................................................................	15
Replacement Parts ...........................................................................................................	16

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374 FC/375 FC/376 FC/902 FC

Calibration Manual

ii

Introduction

XW Warning

To prevent electric shock or personal injury, read the Safety Information before you use the Product.

This manual provides all the information necessary to perform basic maintenance and make calibration adjustments for the 374 FC/375 FC/376 FC and the 902 FC Clamp Meters (the Product). All figures show the 376 FC unless noted.

For complete operating instructions, refer to the 375 FC/375 FC/376 FC Users Manual and the 902 FC Users Manual at www.fluke.com.

How to Contact Fluke

To contact Fluke, use one of these 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: [phone]

•Japan: [phone]

•Singapore: [phone]

•China: [phone]

•Brazil: [phone]

•Anywhere in the world: [phone]

Or, visit Fluke's website at www.fluke.com.

To register your product, visit http://register.fluke.com.

To view, print, or download the latest manual supplement, visit http://us.fluke.com/usen/support/manuals.

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374 FC/375 FC/376 FC and 902 FC

Calibration Manual

Safety Information

A Warning identifies hazardous 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.

XW Warning

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 the Product if it operates incorrectly.

•Do not use the Product if it is altered or damaged.

•Disable the product if it is damaged.

•Prior to use, ensure the Product is clean, dry, and in good repair. Do not use the Product if has been exposed to water, cleaning solutions, battery electrolyte leakage, or other contaminants that may have entered the enclosure. These contaminants can reduce or eliminate the protection provided by the Product against electric shock or arc explosion. Have the product dried, cleaned, or repaired as necessary to ensure continued safe operation.

•Use only correct measurement category (CAT), voltage, and amperage rated probes, test leads, and adapters for the measurement.

•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.

•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.

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