to measurment of surface- and volume resistance according to standard ASTM D 257 and others
high-grade steel quality (V2A)
measuring area diameter: 25 mm
diameter of guard ring: 50 mm outside, 38 mm inside
resulting measuring gap: 6,5 mm
effective measuring area for measurement of volume resistance: 7,79 cm2
max. measuring voltage: 500 V
recommended measuring range:
1 V measuring voltage: 103 ohm to 1013 ohm
100 V measuring voltage: 105 ohm to 1015 ohm
500V measuring voltage: 106 ohm to 1015 ohm