MM94
HIGH PEFORMANCE
TRMS MULTIMETER
I
NSTRUCTION
M
ANUAL
ALWAYS READ THESE INSTRUCTIONS BEFORE PROCEEDING
Thank you for buying one of our products. For safety and a 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
Safety Information
1
1.1
Meaning of Symbols and Markings
1
1.2 Precautions
2
2 Introduction
5
2.1 Inspection
5
2.2 Description
5
2.3
Accessories
6
3 Operation
6
3.1 General
6
3.2
Low Battery Indication
6
3.3
Description of Terminals
7
3.4
Description of Press Buttons
7
3.5
Description of LCD Symbols
7
3.6 Auto
Power
Off
9
3.7 Backlight
9
3.8 Auto/Manual
Ranging
9
3.9 Relative
Function
9
3.10 Min/Max
10
3.11 Display
Hold
10
3.12 High
Frequency
Rejection
11
3.13
Use of the TL16 Test Leads
11
3.14 AC
Voltage
Measurements
11
3.15
DC Voltage Measurements
12
3.16 AC+DC
Voltage
Measurements
12
3.17 Current
Measurements
12
3.18 Peak
Hold
Measurement
13
3.19 Resistance
Measurements
13
3.20 Conductance
Measurements
13
3.21 Capacitance
Measurements
14
3.22
Frequency and Duty Cycle Measurements
14
3.23 Temperature
Measurements
15
3.24 Continuity
Testing
15
3.25 Diode
Testing
16
4 Maintenance
16
4.1
Battery Replacement
16
4.2 Fuse
Replacement
17
4.3
Test Lead Replacement
17
4.4
Calibration
17
4.5 Cleaning
18
4.6 Repair
&
Service
18
4.7 Storage
Conditions
18
5 Warranty
19
Measurement
Categories
20
Specifications
1
1. SAFETY INFORMATION: Always read before proceeding.
REMEMBER: SAFETY IS NO ACCIDENT
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.
Particular attention should be paid to the Warnings, Precautions and
Technical Specifications.
Please keep these instructions for future reference. Updated
instructions and product information are available at: www.
martindale-electric.co.uk
1.1 Meaning of Symbols and Markings
Caution - risk of danger & refer to instructions
Caution - risk of electric shock
Equipment protected by double or reinforced
insulation
(Class II)
CAT II
(Measurement Category II)
is applicable to test and
measuring equipment connected directly to utilization
points (socket outlets and similar points) of the low-
voltage MAINS installation.
