Martindale Electric MM65 Manuel utilisateur
MM65 MULTIMETER
Instruction
Manual
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)
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
CONTENTS
1 Introduction 1
1.1 Inspection 1
1.2 Description 1
1.3 Accessories 1
1.4 Battery Installation 1
2 Product Specific 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 5
3.5 Description of LCD Symbols 5
3.6 Auto Power Off 5
3.7 Manual Range Selection 5
3.8 Data Hold 6
3.9 AC & DC Voltage Measurement 6
3.10 AC & DC Current Measurement 6
3.11 Resistance Measurement 7
3.12 Continuity Testing 7
3.13 Diode Testing 7
4 Maintenance 9
4.1 Battery Replacement 9
4.2 Fuse Replacement
9
4.3 Test Lead Replacement 9
4.4 Calibration 10
4.5 Cleaning 10
4.6 Repair & Service 10
4.7 Storage Conditions 10
5 Warranty 11
Specifications
Specification
MM65
Digital Multimeter
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 MM65 is a 3¾digit multimeter with the following functions:
uAC & DC voltage to 600V
uAC & DC current to 10A
uResistance to 34M
Ω
uContinuity with audible indication
uDiode testing
Further functions are:
uAuto power off
uAuto ranging
uData hold
uIncorrect connection warning
1.3 Accessories (included)
uTL16 test leads
uSpare 0.5A/500V, fast acting ceramic fuse
u9V battery (installed)
uInstructions
1.4 Battery Installation
Refer to Section 4.1 (Battery Replacement) for the battery
installation instructions for the MM65.
1
2. PRODUCT SPECIFIC SAFETY INFORMATION
Measurement Category III (CAT III) is applicable to test and
measuring equipment connected to the distribution part of the
building’s low-voltage MAINS installation.
Measurement Category IV (CAT IV) is applicable to test and
measuring equipment connected at the source of the building’s low-
voltage MAINS installation.
2.1 Precautions
This product has been designed with your safety in mind, but
please pay attention to the following warnings and cautions before
use.
Warning
Before use check the unit for cracks or any other damage. Make
sure the unit is free from dust, grease and moisture. Also check
any associated leads and accessories for damage. Do not use if
damaged.
Warning
Do not use if the battery/fuse cover is not fitted.
Warning
When this unit is used in combination with test leads, the
measurement category of the combination is the lower
measurement category of either this unit or the test leads used.
Likewise, if test lead accessories such as crocodile clips are also
used, the measurement category will be the lowest measurement
category in that combination.
2
Specification
MM65
Digital Multimeter
Warning
Always test this unit on an appropriate proving device or
known voltage source before and after using it to determine if a
hazardous voltage exists in a circuit to be tested.
Warning
When using test leads, always keep your fingers behind the finger
guard on the test lead probe.
Warning
Measuring a voltage that exceeds the specified limits of the unit
may damage the unit and expose the operator to a shock hazard.
Always check the unit’s specified limits before use.
Caution
Avoid severe mechanical shock or vibration and extreme
temperature.
3
3. OPERATION
3.1 General
If the multimeter does not measure current on the μA/mA ranges,
the internal fuse (F1) may have blown (see section 4.2 Fuse
Replacement).
If the multimeter does not measure current on the 10A range
the internal fuse (F2) may have blown (see section 4.2 Fuse
Replacement).
If the magnitude of a parameter to be measured is unknown, but
known to be within the maximum safe limits of the multimeter, then
manually set the range to maximum. For example, if measuring
DC voltage and the voltage magnitude is unknown, set the range
to 600 V, then if required select autoranging for a satisfactory
reading.
If a test lead is connected to the wrong input socket when a
voltage range is selected then a warning buzzer will sound.
If the multimeter displays OL or -OL then the measurement limits
of the range have been exceeded.
3.2 Low Battery Indication
If the symbol is displayed then the battery needs replacing
(see section 4.1 Battery Replacement).
3.3 Description of Terminals
μA mA Input terminal for AC & DC current
measurements to 340mA
10A Input terminal for AC & DC current
measurements to 10A
COM Common terminal for all measurements 4
VΩInput terminal for AC & DC voltage, resistance,
continuity and diode measurements
3.4 Description of Press Buttons
RANGE Switches between auto and manual ranging
HOLD Turns on/off the data hold function
3.5 Description of LCD Symbols
APO Auto power off is active
HOLD Data hold function is selected
RANGE Manual ranging is selected
Continuity function is selected
Diode testing function is selected
mV, V, μA, mA, Unit of measurement
being displayed
A, Ω, kΩ, MΩ
Indicates battery is low
DC Indicates DC measurement
AC Indicates AC measurement
3.6 Auto Power Off
The MM65 will auto power off after approximately 10 minutes.
Pressing any button will turn the MM65 back on.
To deactivate the auto power off function press and hold the
RANGE button while simultaneously turning the MM65 function
switch from OFF to any position. The APO annunciator will no
longer be displayed.
3.7 Manual Range Selection
The MM65 powers up in auto rangeing mode.
5
To manually select a range press the RANGE button to hold the
present range, then continue to press the RANGE button until
the required range is selected. The sequence is lowest range to
highest then directly back to lowest.
To return to autoranging hold the RANGE button for 2 seconds.
3.8 Data Hold
To hold a displayed value press the HOLD button. The LCD will
display HOLD.
To exit data hold press the HOLD button again.
3.9 AC & DC Voltage Measurement
Connect the black test lead to the COM terminal and the red test
lead to the VΩterminal.
Set the rotary switch to either AC V or DC V and if required
manually set the range.
Taking all necessary safety precautions connect the test leads to
the circuit being measured and read the measured voltage from
the display.
3.10 AC & DC Current Measurement
Connect the black test lead to the COM terminal and the red test
lead to the μA mA or 10A terminal depending on the magnitude of
current to be measured.
Set the rotary switch to the required AC or DC current range and if
required manually set the range.
6
Taking all necessary safety precautions connect the test leads
in series with the circuit being measured and read the measured
current from the display.
3.11 Resistance Measurement
Connect the black test lead to the COM terminal and the red test
lead to the VΩterminal.
Set the rotary switch to Ωand if required manually set the range.
Taking all necessary safety precautions connect the test leads to
the circuit being measured and read the measured resistance from
the display.
3.12 Continuity Testing
Connect the black test lead to the COM terminal and the red test
lead to the VΩterminal.
Set the rotary switch to .
Taking all necessary safety precautions connect the test leads to
the circuit being tested.
The buzzer will sound if the resistance is <35Ω.
3.13 Diode Testing
If the diode to be tested is in circuit be sure the circuit power is
switched off.
Connect the black test lead to the COM terminal and the red test
lead to the VΩterminal.
Set the rotary switch to .
7
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