Brand: Metrel

Metrel MI 3242 MicroOhm 2A Low Resistance Ohmmeter

Name: Metrel MI 3242 MicroOhm 2A Ohmmeter – Datasheet & Quote
Brand: Metrel
SKU: MI 3242

Description

A portable micro-ohm meter for joints, contacts, windings and cables

The Metrel MI 3242 MicroOhm 2A is a portable low resistance ohmmeter for measuring the resistance of switches, relays, connectors, busbars, power distribution cable joints, motor and generator windings, power transformers, power inductors, rail track joints, wire and cable, and welded joints in industrial applications. It measures bidirectionally from 1 micro-ohm up to 199.9 ohm with a test current up to 2 A.

Four measuring modes cover the common jobs: automatic, single, continuous and inductive. In the inductive mode it measures motor and generator windings, power transformers, inductors and long cables, which need time to settle. Automatic bidirectional measurement eliminates thermal EMF, 50 Hz and 60 Hz ripple is detected and rejected, and the best resolution is 1 micro-ohm at 0.25 % accuracy.

An overvoltage rating of CAT III / 600 V allows measurement in substations and other points with low line resistance, and an internal protection circuit protects the user and the instrument from inadvertent connection to live lines. Custom limits give a PASS or FAIL verdict with bright green and red indicators. The internal memory holds up to 1500 results with timestamp, and the HVLink PRO software downloads, reviews, analyses and prints them. Battery life is more than 800 measurements of a 500 milliohm load at 2 A with a 15 s measurement duration.

Technical specifications

Parameter	Specification
Resistance, 2 A	9.999 mOhm (1 uOhm), 99.99 mOhm (10 uOhm), 999.9 mOhm (100 uOhm); +/-(0.25 % of reading + 2 digits)
Resistance, 100 mA	99.99 mOhm, 999.9 mOhm, 9.999 Ohm, 19.99 Ohm
Resistance, 10 mA	999.9 mOhm, 9.999 Ohm, 99.99 Ohm, 199.9 Ohm
Voltage	0 to 49.9 V (0.1 V) and 50 to 550 V (1 V), +/-(2 % of reading + 2 digits)
Frequency	10.0 to 500 Hz, +/-(0.2 % of reading + 1 digit)
Measuring modes	Automatic, single, continuous, inductive
Power supply	9 V DC: 6 x 1.5 V AA batteries or rechargeable cells; more than 800 single measurements
Overvoltage category	CAT III / 600 V; CAT IV / 300 V; double insulation
Display / memory	128 x 64 dot matrix display with backlight; 1500 memory locations
Communication	RS232 and USB
Standards	EN 61010-1, EN 61010-031; EMC EN 61326 Class A
Dimensions / weight	140 x 80 x 230 mm; 0.8 kg

Using it and what the set contains

The standard set (ST) includes the instrument, a test cable with Kelvin probe, a 2.5 m four-wire test cable, four crocodile clips, two test probes, a power adapter with six 1.2 V NiMH batteries, RS232 and USB cables, a soft carrying bag, the HVLink PRO software, the instruction manual and a calibration certificate. Optional accessories listed are a Kelvin test cable, test cable with Kelvin probe, large Kelvin test clip, large crocodile clips and a class 0.1 reference resistor of 750 micro-ohm (A 1333 V2) for checking the instrument.

Four-wire Kelvin connection removes the lead resistance from the reading, which is why the test cable with Kelvin probe and the Kelvin clips matter when measuring a few micro-ohms on a busbar joint or a bolted connection.

What to confirm before ordering

State the lowest resistance you need to resolve and the highest test current your object allows, since the 2 A range is the most sensitive and the leaflet shows lower currents for higher resistances. Confirm the clips and probes for the contact geometry (large Kelvin clips for busbars, for example), whether a reference resistor is wanted, and the calibration certificate requirement. The leaflet notes that photographs may differ slightly from the delivered instrument and that specifications can change without notice.

Documents and quotation

The Metrel leaflet is attached as a datasheet. For a 10 A class instrument see the Megger DLRO10X 10 A digital low resistance ohmmeter; more instruments are in the portable test and measurement category. Send the model, accessories and quantity for a quotation from Seven Star LLC.

Datasheets & Documents

Datasheet Metrel MI 3242 MicroOhm 2A product leaflet (PDF) Download

Reviews (0)

Reviews

There are no reviews yet.

How would you rate this product?

About brand

Metrel is a Slovenian manufacturer of electrical installation testers and power quality instruments, based in Horjul near Ljubljana. It was set up in 1957 as a factory making electrical measuring instruments and components for the domestic market and grew into an exporter whose testers are sold through distributors in more than 70 countries. Metrel d.o.o. designs, builds and calibrates its instruments in Slovenia.

Seven Star LLC is an independent supplier in Muscat. We list Metrel testers for electrical contractors, utilities and maintenance teams in Oman and the GCC.

Metrel company profile

Founded	1957, Slovenia
Headquarters	Horjul, Slovenia (Metrel d.o.o.)
Group	Metrel Group of four companies: two in Slovenia, one in Germany and one in the United Kingdom
In-house services	Own R&D plus accredited calibration and repair departments
Product families	EurotestXC and Eurotest multifunction installation testers, earth and insulation resistance testers, PAT testers, PV installation testers, Power Master power quality analysers, machine and switchboard safety testers

Milestones

1957: Metrel is set up as a factory for electrical measuring instruments.
Today: Metrel instruments are sold through distributors in more than 70 countries.

Metrel product series

Installation testers include the MI 3152 EurotestXC and the MI 3155 EurotestXD for low-voltage installation verification, and the MI 3121 SMARTEC insulation and continuity tester. Insulation testers include the MI 3201 TeraOhm 5 kV Plus, the MI 3205 TeraOhmXA 5 kV with IP65 housing and the MI 3211 TeraOhmHP 10 kV. The MI 3242 MicroOhm 2A measures low resistance on joints, busbars and windings.

Earth testing is covered by the MI 3290 Earth Analyser and the MI 3288 earth insulation tester, and power quality by the MI 2892 Power Master and MI 2893 Power Master XT class A analysers and the MI 2885 Master Q4 class S analyser.

Where Metrel instruments are used

Verification of new and existing building installations, insulation testing of cables, motors and transformers, earthing and lightning protection measurements at substations and towers, and power quality surveys in industrial and commercial plants.

Metrel products we list

Family	Examples
Portable Test & Measurement	MI 2892 Power Master Class A Power Quali…, MI 2893 Power Master XT Class A Power Qu…, MI 3121 SMARTEC Insulation and Continuit…, MI 3152 EurotestXC Multifunctional Insta…, MI 3155 EurotestXD Industrial Installati…, MI 3201 TeraOhm 5 kV Plus High Voltage I…, MI 3205 TeraOhmXA 5 kV IP65 Insulation T…, MI 3211 TeraOhmHP 10 kV Insulation Resis… and 2 more

Ordering Metrel instruments: what we need

Give the complete model name and the set you want, because Metrel sells most instruments as standard, Euro or advanced sets with different leads, clamps and software licences. List accessories separately and state the standard your testing must follow. If you are unsure of the model, describe the installation, test voltage and measurements required.

Facts checked against Metrel's own company pages (metrel.si) and trade directories, October 2026.

Browse Metrel products by category: Portable Test & Measurement.