Product Details

The ACL-385 uses the ASTM standard D-257 parallel electrode sensing method, allowing simple and repeatable measurements of various conductive, static dissipative, and insulating surfaces.

To measure surface impedance, place the meter on the surface to be tested, press and hold the red TEST button, and the continuously lit light-emitting diode (LED) indicates the magnitude of the surface impedance.
10^3 = 1 kilohm　　　　　Green LED
10^4 = 10 kilohms　　　　 Green LED
10^5 = 100 kilohms　　 　 Green LED
10^6 = 1 megohm　　　 　 Yellow LED
10^7 = 10 megohms 　　 　 Yellow LED
10^8 = 100 megohms 　　　 Yellow LED
10^9 = 1000 megohms 　　　Yellow LED
10^10 = 10000 megohms 　　Yellow LED 
10^11 = 100000 megohms　　Yellow LED 
10^12 = 1000000 megohms　 Red LED
>10^12 = Insulating Red LED
Measuring Resistance to Ground
Insert the ground wire into the Ground socket, which insulates the right sensing electrode of the meter (on the same side as the socket). Attach the alligator clip to your ground wire.
Place the meter on the surface to be tested, press and hold the TEST button, and the continuously lit LED indicates the magnitude of the resistance to ground. The unit of this measurement is ohms.