Altimeter measured electrical voltmeter instrument with 10,000 Ohm impedance measures the potential difference between the 0 to 100 Volts, if you want to measure, up to 400 volts are required per X resistance and value X.
Electricity meter that measures the voltmeter one with 10 000 ohms impedance measuring the potential difference between 0-100 V. To measure provides up to 400 volts will be the resistance, however, X and X is the value. fold
The power meter used to measure the voltmeter resistance, one 10 000 ohm. Used to measure the voltage between the 0-100 v. if want to measure up to 400 volt will be on the resistance X how values are equal, and X