Weidmüller has recently introduced six new versions of 2-pole voltage testers that fulfil the revised standard for these types of testers i.e. DIN VDE 0682-401:2011 and DIN EN-61243-3:2010).

The revised standard for 2-pole voltage testers came into force on 1st May 2010, and took effect on 1s October 2010, with a three year transitional period. A 2-pole voltage tester is the only test instrument approved to determine safe isolation from the power supply that complies fully with occupational health and safety law.

The standard covering 2-pole voltage testers calls for a variety of changes, amongst others, these affect the protection class, the voltage category, and climatic conditions, as well as EMC compliance.

Weidmüller’s new testers are not entering the market, as required by the revised standards, with a minimum degree of protection of IP54. They are actually rated to IP65, which means they are effectively sealed to offer protection against the ingress of dust and offer all round protection against jets of water.

The 2-pole voltage testers Digi-Check Pro, Digi-Check, Multi-Check, Combi-Check Pro and Combi-Check are CAT IV – 600V instruments while the Master-Check belongs to the category CAT IV – 400V.

As a consequence, as well as being suitable for measuring circuits electrically connected with a low voltage system, they are also suitable for measurements in building installations. Moreover, the new voltage testers are all temperature resistant, from -15°C to 45°C. To protect human health and the environment, the requisite tests to guarantee electromagnetic compatibility were updated in compliance with the standards.

The Digi-Check Pro and Combi-Check Pro are top of the range versions, while the Digi-Check, Multi-Check, Combi-Check and Master-Check focus more on functional highlights.

Amongst other features, the digital voltage testers Digi-Check Pro, Digi-Check and Multi-Check are equipped with a large LC display, including bargraph – the display of the Combi-Check Pro, Combi-Check and Master-Check incorporate a row of LEDs.

In addition, a light sensor in the testers with LC display activates the background lighting only in dark surroundings to increase the service life of the battery. There is also a white LED which illuminates the measuring point – in contrast to yellow LEDs, white LEDs enable colours to be recognised more easily – and they consume less power. Moreover, when measuring and testing points with a poor line of sight, the ‘Hold’ function makes it is possible to hold and read measurement values later on.

A 2-pole phase sequence test function provides direct indication for both clockwise and counter clockwise rotation. Depending on the version, the large measuring range covers 400, 500 or 690V – with direct and alternating currents recognised automatically.

All the 2-pole voltage testers automatically recognise the type of voltage (AC/DC) under test and indicate polarity. As well as phase testing to earth, continuity and semi-conductor tests (possible using only one hand) also belong to the indispensable spectrum of tests. High input resistance ensures safe touch protection.

Load connection and RCD tripping with the top of the range versions Digi-Check Pro and Combi-Check Pro, is achieved by simply pressing dual pushbuttons connects a load that can trip a 30mA RCD or suppress an inductive reactive power. Actively connecting the load excludes the possibility of unintentionally tripping the RCD when testing.

It is also possible to fit snap-in markers to Weidmüller’s voltage testers to allow them to be personalised with an electrician’s name, an inventory number or similarly useful information.