Since we are on this topic....
I am adding a string (40) resistors to use a 10 mA meter as a 0-3000VDC voltmeter. The meter actually draws .00842mA full scale and so I getting a power dissipation of 25W for the resistor string!
Perhaps meters, used to read high voltages, have to draw small currents to avoid this?
ERich
Typically 1000 ohms per volt. Multiple resistors are still used so as not to exceed voltage across each resistor. Back to back diodes across the meter for safety in case the meter multiplier were to short through a carbon trace.
