The Martindale EZ150 was the first socket tester to include measurement of earth loop impedance. Conventional socket testers will only indicate the presence of an earth, however if the socket has a dangerously high earth resistance, they will not be able to identify this. Using the EZ150 gives you the peace of mind that not only is the socket wired correctly, but also the earth resistance is within acceptable levels.

Martindale's T-Safe^TM technology is incorporated into the EZ150, in order to ensure that RCDs will not trip when the loop impedance check is carried out.

Earth loop measurement, and socket faults, are all indicated with bright, long-life LEDs. This unit should be used as an indicator only and not to provide readings for completion of certificates.

Mains Supply

230V (50Hz)

Earth Loop Impedance Span

0 - 1.7Ω, 1.7 - 5Ω, 5 to 10Ω, 10 to 100Ω, 100 to 200Ω, 200 to 500Ω

Earth Loop Impedance

+/- 10%, +0.3Ω

Voltage Low Indication

<195V

Voltage High Indication

>270V

Open Earth Indication

>500Ω

Power Consumption

<1.6W

Overvoltage

CAT II, 300V

Housing

Flame retardant ABS

Dimensions

65 x 65 x 50mm

Weight

64g approx

Martindale EZ150 Specification Sheet

Martindale EZ150 Instruction Manual

Will socket testers spot all mains wiring faults?
No, they cannot tell if the earth and neutral wires are reversed and most conventional testers can only tell if the earth is disconnected.

Please click the links below to download the application notes in pdf format.

Socket testing safety