Fluke 10 Manuale utente
®
10,11,12
Multimeters
Service
PN 900824
March 1992 Rev.1, 7/93
© 1992-1993 Fluke Corporation, All rights reserved. Printed in USA
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.
i
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
v
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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