Martindale MM39 Standard Auto Ranging Digital Multimeter

The Martindale MM39 Standard Auto Ranging Digital Multimeter provides a simple way to carry out everyday electrical measurements. It combines essential testing functions with auto-ranging operation for quick setup. As a result, users can work more efficiently without spending time selecting ranges manually.

A large rotary selector makes function changes clear and easy. Two dedicated buttons allow manual range selection when needed and also provide a convenient data hold function. In addition, the clear 3½ digit LCD display helps users read measurements quickly in a range of working environments.

Built for Everyday Electrical Testing

Designed for electrical maintenance and fault finding, the Martindale MM39 Standard Auto Ranging Digital Multimeter measures AC and DC voltage up to 600V. It also measures AC and DC current up to 10A and resistance up to 20MΩ. This makes it suitable for a wide range of routine testing tasks.

For added convenience, the meter includes both diode testing and continuity testing functions. An audible buzzer sounds when resistance falls below 25Ω, making circuit checks faster and easier. Furthermore, the auto-ranging design helps reduce setup time while improving ease of use.

Safe and Practical Design

The Martindale MM39 Standard Auto Ranging Digital Multimeter conforms to BS EN61010-1 and carries a CAT III 600V safety rating. This provides confidence when working on electrical installations and equipment. At the same time, the compact housing remains easy to carry and store between jobs.

Two different set types are available to meet different user requirements. Each version is based on the same dependable meter platform and delivers reliable measurement performance. A two-year warranty is also included for additional peace of mind.

Key Features

Auto-ranging multimeter design
Large rotary selector switch
Manual range selection option
Data hold function for captured readings
3½ digit LCD display
AC voltage measurement capability
DC voltage measurement capability
AC current measurement capability
DC current measurement capability
Diode test function
Audible continuity testing
CAT III 600V safety rating
Compact handheld construction
Suitable for electrical maintenance tasks
Conforms to BS EN61010-1
Available in two different set configurations

Technical Specifications

Manufacturer	Martindale Electric
Manufacturer part code	MM39
Display	3½ digit LCD display
Display counts	1999 counts
Range selection	Auto-ranging
DC voltage ranges	200mV, 2V, 20V, 200V, 600V
DC voltage resolution	0.1mV on 200mV range
DC voltage accuracy	±1.0% rdg + 2 digits
AC voltage ranges	200mV, 2V, 20V, 200V, 600V
AC voltage frequency range	50Hz to 500Hz
AC voltage accuracy	±2.0% rdg + 5 digits
DC current range	10A
DC current resolution	10mA
DC current accuracy	±3.0% rdg + 3 digits
AC current range	10A
AC current frequency range	50Hz to 500Hz
AC current accuracy	±3.5% rdg + 5 digits
Resistance ranges	200Ω, 2kΩ, 20kΩ, 200kΩ, 2MΩ, 20MΩ
Resistance resolution	0.1Ω on 200Ω range
Resistance accuracy	±1.5% to ±5.0% depending on range
Diode test accuracy	±3.0% rdg + 3 digits
Continuity indication	Audible below 25Ω
Display hold	Yes
Auto power off	Approximately 10 minutes
Power supply	2 x AAA batteries
Dimensions	145 x 70 x 42.5mm
Weight	315g
Operating environment	0°C to 50°C below 70% RH
Storage environment	-20°C to 60°C below 80% RH
Safety rating	CAT III 600V
Compliance	BS EN61010-1
Warranty	2 Years