ST-3 detector surface impedance measurement range 104.0 至 1012.0 Ohm / sq. After the decimal point accuracy up to. Can be measured ground points to the face of resistance, easy to check the working face, cables and ground anti-static performance consistency. lightweight easy to use, plug in the probe pin, with the release that is displayed. Built-in rechargeable battery, a light to indicate low battery. ? ? Surface to surface impedance measurement of grounding resistance measurement ? Detection range 104.0 至 1012.0 Ohm / sq ? a decimal display ? with the release that is used, no adjustment ? out of range display ? Low battery performance display specifications: Input voltage: NiCd rechargeable batteries, charger components need to be configured (output: 12VDC, 100mA) switch: Auto, down the open, removed the off detection range: - surface impedance 104.0 至 1012.0 Ohm / sq - the surface to take place 104.0 至 1012.0 Ohm Accuracy: + / - 1 / 2 (example: 10 8.5 + / -0.5) probe feet: You can replace the parallel track of special conductive rubber (asked the on the dry environment) Measuring voltage: 15VDC (maximum 1.5 mA current) working temperature and humidity: 15 - 40 deg C / RH: 0 - 60% display: - value 1.02 x 0.5 LCD display panel - to the ground surface of the green LED lights - LED lights green surface impedance - the red LED light is out of range - the red LED light performance with low battery weight / volume: 1.15 kg / 15.3 cm x 7.1 cm x 7.8 cm (with battery)