On-site grounds can be tested separately without having to remove the utility connection with the added ART function. The ART ground testing method is more convenient and significantly reduces testing time as much as 40%.

All models are rated to IP54 making them truly outdoor instruments. The testers are easy to use — a large selector switch makes selection for 2-pole, 3-pole or 4-pole quicker to test — and the design makes the fitting of shorting links to perform 2-pole tests a thing of the past. The instruments also include a voltmeter to enable measurement of ground voltage. The testers can measure resistance from 0.01 ohm to 2000 ohms and earth voltages up to 100V. To allow accurate testing in noisy environments, the instruments are capable of rejecting noise of up to 40V peak to peak.