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M-2666K
Elenco Electronics M-2666K User Manual
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DIGIT
AL MUL
TIMETER KIT
MODEL M-2666K
WIDE RANGE DIGIT
AL MUL
TIMETER
WITH
CAP
A
CIT
ANCE
AND TRANSIST
OR TESTING
FEA
TURES
Assembl
y and Instruction Manual
Elenco
TM
Electr
onics,
Inc.
Cop
yr
ight © 2003 by Elenco
TM
Electronics, Inc.
All rights reser
ved.
753128
No par
t of this book shall be reproduced by an
y means;
electronic
, photocopying, or otherwise without written permission from the publisher
.
2
Table of Contents
Introduction
2
Theory of Operation
2
Simplified Block Diagram
2
A/D Converter
3
Dual Slope A/D Converter
3
Voltage Measurement
4
Current Measurement
4
Simplified Voltage Measurement Diagram
4
Simplified Current Measurement Diagram
4
Resistance Measurements
5
Measurement
5
Capacitance Measurement
5
Digital Section
6
ANALOG SECTION of 7106
6
Functions
6
Assembly
7
Important Construction Notes
7
Construction
8
Safety Procedures
8
Assemble Components
8
Types of Poor Soldering Connections
8
Identifying Capacitor Values
9
Identifying Resistor Values
9
Part Identification Cards
9
Resistor Reading Exercise
10
Meter Display Circuit
11
Parts List
11
Resistors
11
Capacitors
11
Parts Identification
11
Assemble the Following Components to the Pc Board
12
Bottom Legend Side
12
Assembled View
12
Top Legend Side
12
Assemble the Lcd
13
Testing Procedure
13
DC Voltage & Current Circuit
14
Semiconductors
14
Miscellaneous
14
Parts Identification
14
AC Voltage & Current Circuit
17
Resistance & Buzzer Circuit
18
Capacitance and Transistor Testing Circuit
20
Final Assembly
23
Troubleshooting Guide
26
U1 (7106) Voltage Test
26
Voltage/Ohm Section
26
AC Voltage Section
26
Amps Section
27
Capacitance Section
27
Decimal Point Section
27
Diode
27
Reinstallation of the Range Selector Knob
28
Using the Digital Multimeter
28
Bottom View of Selector Knob & Slide Contacts
28
Resistance of Test Leads
28
Features
29
Specifications
29
Measurement Ranges
29
DC Voltage
29
AC Voltage
30
Resistance
30
DC Current
30
Capacitance
30
Operation
31
Preparation and Caution before Measurement
31
Panel Description
31
Method of Measurement
32
DC/AC Voltage Measurement
32
DC/AC Current Measurement
32
Diode Test
32
Operation Maintenance
33
Battery and Fuse Replacement
33
Safety Symbols
33
Schematic Diagram
34
Quiz
35
4
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Elenco Electronics M-2666K Specifications
General
Brand
Elenco Electronics
Model
M-2666K
Category
Multimeter
Language
English
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