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MM84

 

MULTIMETER

Instruction
Manual

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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 
Specifi cations. 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

 

End of life disposal of this equipment should be 

 

in accordance with relevant EU Directives 

 

 

Caution - risk of electric shock

 
 

Caution - risk of danger & refer to instructions

 

Equipment protected by double or reinforced insulation (Class II)

 

Direct current (DC) 

 

Alternating current (AC)

 Earth 

(ground)

 

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Thank you for buying one of our products. For safety and full 
understanding of its benefi ts please read this manual before use. 
Technical support is available from 01923 441717 and 
[email protected].

CONTENTS

11 Introduction 

1.1 Inspection 

1

1.2 Description 

1

1.3  

Accessories 

2  

Product Specifi c Safety Information   

2

2.1  

Precautions 

2

3 Operation 

4

3.1 General 

4

3.2 

Low Battery Indication 

4

3.3 Description 

of 

Terminals 

4

3.4 

Description of Press Buttons 

4

3.5 

Description of LCD Symbols 

5

3.6 Incorrect 

Connection 

Warning 

5

3.7 

Auto Power Off 

5

3.8 Data 

Hold 

5

3.9 

AC & DC Voltage Measurement 

5

3.10 

AC & DC Current Measurement 

6

3.11 Resistance 

Measurement 

6

3.12 Frequency 

Measurement 

6

3.13 

Duty Cycle Measurement 

6

3.14 Continuity 

Testing 

7

3.15 Diode 

Testing 

7

3.16 Logic 

Testing 

7

4 Maintenance 

4.1  

Battery Replacement 

8

4.2 Fuse 

Replacement 

8

4.3 

Test Lead Replacement 

9

4.4 Calibration 

4.5 Cleaning 

9

4.6 

Repair & Service 

4.7 

Storage Conditions 

10  

5 Warranty 

10

 

Specifi cations

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1

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 MM84 is a 4½ digit multimeter with the following functions:

‹

 True rms AC voltage to 750V

‹

 DC voltage to 1000V

‹

 True rms AC current to 20 A

‹

 DC current to 20A

‹

 Resistance to 20M

:

‹

 Frequency to 200kHz

‹

 Continuity with audible indication

‹

 Diode testing

‹

 Duty cycle

‹

 Logic test

Further functions are:

‹

 Data hold 

 

‹

 Auto power off

‹

 Incorrect connection warning

1.3 Accessories (included)

‹

 TL16 test leads

‹

 Holster

‹

 9V battery (installed)

‹

 Instructions

1.4 Battery Installation

Refer to section 4.1 (Battery Replacement) for the battery 
installation instructions for the MM84.

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