VICTOR 385 Digital Earth Resistance Tester Surface Resistance Meter ASTM Standard
 
VICTOR 385   Surface Resistance Meter electronic components Electrostatic Instrument Static Detector Insulation Resistance Tester
 
I. DISCRIPTION
It is a surface or surface grounding resistance tester. According to ASTM standard D-257 parallel electrode sensing way to do the surface resistance test. It can simply and repeatedly test various types of the surface, such as conduction type, release type and insulating surface.
 
II. OPERATION

• Open the battery door and install the battery inside. Keep the device from the surface of the tested object, hold the red “TEST” button, and at this time the insulation light on.
• Put the device on the surface of the tested object and press “TEST” button, the light LED will indicate the order of magnitude of impedance of the surface.

10³=1KΩ GREEN LED

10⁴=10KΩ GREEN LED

10⁵=100KΩ GREEN LED

10⁶=1MΩ GREEN LED

10⁷=10MΩ GREEN LED

10⁸=100MΩ GREEN LED

10⁹=1000MΩ GREEN LED

10¹⁰=10000MΩ GREEN LED

10¹¹=100000MΩ GREEN LED

10¹²=1000000MΩ RED LED

>10¹²=INSULATION RED LED
3, Earthing resistance test

Insert the earth wire into the ground socket, so that it is insulated from the right side of the meter (with the same side of the socket) and the alligator clamp is connected to the earth wire. Place the meter on the surface of the object, and hold the "TEST" button, and continue lighting LED indicating the magnitude of the earthing resistance. The unit of measurement is Ω.

III. CALIBRATION
This meter need a calibration every 12 months, use a decade resistance box, put the standard resistance bridged between the two parallel electrodes of the meter to see if the indication is within the target range. Or you can send the meter back to our factory and do the calibration.
The transition point of impedance value is 0.5 logarithm (i.e. 3.16*10n). The linear value of the transition point is (+10%) of the median value of each measuring range.