AEMC 5100 User Manual

Megohmmeter Models 5000N/5100/5110- 37 -THE EFFECTS OF TEMPERATUREInsulation resistance measurements are changed by variations intemperature of the insulation material. Typically, when the temperaturegoes up, the insulation resistance will go down. Inversely, when thetemperature drops the insulation resistance will increase in value.The best way to obtain consistent measurement results is to test theinsulation at a standard temperature, typically 68°F (20°C). If thetemperature of the material you are testing is either higher or lower than68°F (20°C), refer to the temperature correction chart (see table). As ageneral rule the insulation resistance value may be corrected by:• Halving the resistance measurement value for every 10°C above thebase temperature of 68°F (20°C), or• Doubling the resistance value for every 10°C below 68°F (20°C)°C °F MultiplicationFactor0 32 0.255 41 0.3610 50 0.5015 59 0.7520 68 1.0025 77 1.4030 86 1.9835 95 2.8040 104 3.9545 113 5.6050 122 7.8555 131 11.2060 140 15.8565 149 22.4070 158 31.7575 167 44.7080 176 63.50