Fluke 10 Manuale utente

10,11,12

Multimeters

Service

PN 900824

March 1992 Rev.1, 7/93

All product names are trademarks of their respective companies.

WARRANTY

Fluke warrants to the original product purchaser that each product it manufactures will

be free from defects in material and workmanship under normal use and service. The

warranty period is controlled by the warranty document furnished with each product and

begins on the date of shipment. Fluke’s warranty does not apply to fuses, batteries,

CRTs or any product which, in Fluke’s opinion, has been misused, altered, neglected, or

damaged by accident or abnormal conditions of operation or handling.

To obtain warranty service in the USA, call 1-888-99-FLUKE (1-888-993-5853). Outside

the USA, contact your nearest Fluke sales or service representative. Fluke assumes no

risk for damage in transit. Fluke will, at its option, repair or replace the defective product

free of charge or refund the purchase price. However, if Fluke determines that the failure

was caused by misuse, alteration, accident, or abnormal condition of operation or

handling, you will be billed for the repair and the repaired product will be returned to you

transportation prepaid.

THIS WARRANTY IS EXCLUSIVE 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

OR USE. FLUKE WILL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL,

OR CONSEQUENTIAL DAMAGES OR LOSS OF DATA, WHETHER IN CONTRACT,

TORT, OR OTHERWISE.

Some states do not allow the exclusion or limitation of incidental or consequential

damages, or implied warranty periods, so the above limitations may not apply to you.

Other rights may vary from state to state.

Fluke Corporation Fluke Europe B.V

P.O. Box 9090 P.O. Box 1186

Everett, WA 98206-9090 5602 BD Eindhoven

U.S.A. The Netherlands

MULTIMETER SAFETY

The Fluke 10, 11, 12 Multimeters have been designed and tested according to IEC

Publication 348, Safety Requirements for Electronic Measuring Apparatus. This manual

contains information and warnings which must be followed to ensure safe operation and

retain the meter in safe condition. Use of this equipment in a manner not specified herein

may impair the protection provided by the equipment.

These mutimeters comply with part 15 of the FCC Rules. Operation is subject to the

following two conditions: (1) these multimeters may not cause harmful interference, and

(2) these multimeters must accept any interference received, including interference that

may cause undesired operation.

Some common international electrical symbols used in this manual are shown below.

BAC - ALTERNATING

CURRENT YDANGEROUS

VOLTAGE

FDC - DIRECT

CURRENT JEARTH GROUND

DEITHER AC OR DC

CURRENT WSEE EXPLANATION

IN MANUAL

IFUSE TDOUBLE INSULATION

FOR PROTECTION

AGAINST ELECTRIC

SHOCK

Before using the meter, read the following safety information carefully. In this manual,

"WARNING," is reserved for conditions and actions that pose hazard(s) to the user;

"CAUTION," is reserved for conditions and actions that may damage your meter.

•Avoid working alone

•Follow all safety procedures for equipment being tested.

•Inspect the test leads for damaged insulation or exposed metal. Check test lead

continuity. Damaged leads should be replaced.

•Be sure the meter is in good operating condition.

•Select the proper function for your measurement.

•To avoid electrical shock, use caution when working above 60V dc or 30V ac RMS.

•Disconnect the live test lead before disconnecting the common test lead.

•Disconnect the power and discharge high-voltage capacitors before testing in Ωand

LR.

•When making a current measurement, turn the circuit power off before connecting

the meter in the circuit.

•Check meter fuses before measuring transformer secondary or motor winding

current. An open fuse may allow high voltage build-up, which is potentially

hazardous.

•Use clamp-on probes when measuring circuits exceeding 10 amps.

•When servicing the meter, use only the replacement parts specified.

•Do not allow meter to be used if it is damaged or if its safety is impaired.

Table of Contents

Chapter Title Page

1 Introduction and Specifications ........................................................ 1-1

1-1. Introduction........................................................................................... 1-1

1-2. Specifications........................................................................................ 1-1

2 Theory of Operation ........................................................................... 2-1

2-1. Introduction........................................................................................... 2-3

2-2. Theory of Operation.............................................................................. 2-3

2-3. Analog Measurement IC (U1).......................................................... 2-3

2-4. Microcomputer IC (U2).................................................................... 2-3

2-5. VCHEK Input Resistance................................................................. 2-3

3 Maintenance........................................................................................ 3-1

3-1. Introduction........................................................................................... 3-3

3-2. Disassembly and Reassembly............................................................... 3-3

3-3. Cleaning................................................................................................ 3-7

3-4. Performance Tests................................................................................. 3-7

3-5. Calibration ............................................................................................ 3-8

4 Replaceable Parts and Schematics................................................... 4-1

4-1. Introduction........................................................................................... 4-3

4-2. How To Obtain Parts ............................................................................ 4-3

4-3. Schematics............................................................................................ 4-3

4-4. Warranty and Service Centers .............................................................. 4-4

iii

List of Tables

Table Title Page

1-1. Specifications......................................................................................................... 1-2

2-1. Electrical Components on Main PCA.................................................................... 2-4

2-2. U1 Pinout Table ..................................................................................................... 2-5

3-1. Required Equipment............................................................................................... 3-7

3-2. Performance Tests for Fluke 10 ............................................................................. 3-9

3-3. Performance Tests for Fluke 11 and 12.................................................................. 3-10

4-1. Final Assembly....................................................................................................... 4-5

4-2. A1 Main PCA......................................................................................................... 4-7

List of Figures

Figure Title Page

2-1. Typical VCHEK Input Resistance with DC Volts Function Selected ................... 2-7

3-1. Disassembled Unit.................................................................................................. 3-4

3-2. Removing and Reinserting the Printed Circuit Assembly...................................... 3-5

3-3. Calibration Adjustment.......................................................................................... 3-10

4-1. Final Assembly Drawing........................................................................................ 4-6

4-2. A1 Main PCA Components.................................................................................... 4-9

4-3. Fluke 10 Schematic................................................................................................ 4-10

4-4. Fluke 11 Schematic................................................................................................ 4-12

4-5. Fluke 12 Schematic................................................................................................ 4-14

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