MARTINDALE MM68 Instruction Manual

MM68 MULTIMETER
Thank you for buying one of our products. For safety and full
understanding of its benefits please read this manual before
use. Technical support is available from 01923 441717 and
support@martindale-electric.co.uk.
CONTENTS
1

Introduction

1.1

Inspection

1.2

Description

1.3

Accessories

1.4 Battery Installation
2 Product Specific Safety Information
2.1 Precautions
3 Operation
3.1 General
3.2 Low Battery Indication
3.3 Description Of Terminals
3.4 Description Of Press Buttons
3.5 Description Of Lcd Symbols
3.6 Auto Power Off
3.7 Max/Min
3.8 Relative Function
3.9 Backlight
3.10 Manual Range Selection
3.11 AC & DC Voltage Measurement
3.12 AC & DC Current Measurement
3.13 Resistance Measurement
3.14 Capacitance Measurement
3.15 Frequency Measurement
3.16 Duty Cycle Measurement
3.17 Continuity Testing
3.18 Diode Testing
4 Maintenance
4.1 Battery Replacement
4.2 Fuse Replacement
4.3 Test Lead Replacement
4.4 Calibration
4.5 Cleaning
4.6 Repair & Service
4.7 Storage Conditions
5 Warranty
Specifications
I
NSTRUCTION
M
ANUAL
1
1
1
1
3
3
5
5
5
5
6
6
6
7
7
7
7
8
8
8
9
9
9
10
10
11
11
11
11
12
12
12
12
13
GENERAL SAFETY INFORMATION: Always read before proceeding.
Warning
These instructions contain both information and warnings that are necessary for
the safe operation and maintenance of this product. It is recommended that you
read the instructions carefully and ensure that the contents are fully understood.
Failure to understand and to comply with the warnings and instructions can result
in serious injury, damage or even death.
In order to avoid the danger of electrical shock, it is important that proper safety
measures are taken when working with voltages exceeding 30V AC RMS, 42V AC
peak or 60V DC.
This product must only be used by a competent person capable of interpreting the
results under the conditions and for the purposes for which it has been
constructed. Particular attention should be paid to the Warnings, Precautions and
Technical Specifications. Always check the unit is in good working order before
use and that there are no signs of damage to it. Do not use if damaged.
Where applicable other safety measures such as use of protective gloves, goggles
etc. should be employed.
Please keep these instructions for future reference. Updated instructions and
product information are available at: www.martindale-electric.co.uk
REMEMBER: SAFETY IS NO ACCIDENT
MEANING OF SYMBOLS:
Equipment complies with relevant EU Directives
Caution - risk of danger & refer to instructions
Caution - risk of electric shock
Equipment protected by double or reinforced insulation (Class II)
End of life disposal of this equipment should be
in accordance with relevant EU Directives
Direct current (DC)
Alternating current (AC)
Earth (ground)
1. INTRODUCTION
1.1 Inspection
Examine the shipping carton for any sign of damage. Inspect the
unit and any accessories for damage. If there is any damage then
consult your distributor immediately.
1.2 Description
The MM68 is a 4½ digit multimeter with the following
measurement functions:
True rms AC voltage to 750V
N
N DC voltage to 1000V
N True rms AC current to 10A
N DC current to 10A
N Resistance to 220MΩ
Capacitance to 22mF
N
N Frequency to 22MHz
N Continuity with audible indication
N Diode testing
N Duty cycle
Further functions are:
N Max/Min indication
N Auto power off
N Display backlight
Relative function
N
N Auto ranging
N Incorrect connection warning
1.3 Accessories (included)
N TL16 test leads
N Spare 0.5A/500V, fast acting ceramic fuse
N 9V battery (installed)
N Instructions
1