Table of Contents
Advertisement
Calculating Meg-Ohms The Impedance of a test object can be determined by the formula:
V/I=R where voltage in Volts divided by current in Amps equals Resistance in Ohms.
Resistance divided by 1,000,000 then equals Meg-Ohms: R/1,000,000=Meg-Ohms
When voltages are in Kilovolts and currents are in Milliamps, a more direct method is to directly divide
Kilovolts by Milliamps to obtain the result directly in Meg-Ohms.
KV/mA=Meg-Ohms
Example: 10kv divided by 2mA equals 5Meg-Ohms
Many times, though, the current will be in micro amps. In this case, micro amps must first be converted to
milliamps, or the formula must be changed to accommodate micro amps.
Micro amps can be converted to milliamps by dividing by 1,000.
uA/1,000=mA
formula. 10kV divided by .05mA equals 200Meg-Ohms
An alternate method is to use the formula; Kilovolts divided by Microamps multiplied by 1,000 equals Meg-
Ohms.
KV/uA x 1,000=Meg-Ohms
Example: 10kV divided by 50uA times 1,000 equals 200Meg-Ohms
DCD 4120-10
OPERATING INSTRUCTIONS
Example: 50 uA/1,000=0.05mA. The result can now be used directly in the above
4-2
Advertisement
Table of Contents
