Hi; All
I have a 3.5" DIA. meter that has a 0-20 scale, the face of the meter reads as follows (KILOVOLTS D. C., 0-5-10-15-20, use with external resistor, weston electrical instrument corp. newark nj. usa, 1000Ω/volt, model 301, no).
I want to use the meter with a voltage divider so that it reads 1Mv full scale,so I can measure the output voltage of my electrostatic machines. I read the article titled Voltmeter impact on measurement, and the math on voltage dividers looks easy enough, and was planing on a 50:1 voltage divider. If I understand the article correctly that meter requires 1mA for full scale deflection,but these machines only put out 10's of μA.
My questions are:
1) Is this possible?
2)Would you put a 1kΩ resistor in series with the meter as the external resistor for the meter circuit?
3)Does this require an amplifier to measure voltages at the μA level?
This is my first post and I hope that I have made the problem clear enough for everyone to understand. Thank's for any help
I have a 3.5" DIA. meter that has a 0-20 scale, the face of the meter reads as follows (KILOVOLTS D. C., 0-5-10-15-20, use with external resistor, weston electrical instrument corp. newark nj. usa, 1000Ω/volt, model 301, no).
I want to use the meter with a voltage divider so that it reads 1Mv full scale,so I can measure the output voltage of my electrostatic machines. I read the article titled Voltmeter impact on measurement, and the math on voltage dividers looks easy enough, and was planing on a 50:1 voltage divider. If I understand the article correctly that meter requires 1mA for full scale deflection,but these machines only put out 10's of μA.
My questions are:
1) Is this possible?
2)Would you put a 1kΩ resistor in series with the meter as the external resistor for the meter circuit?
3)Does this require an amplifier to measure voltages at the μA level?
This is my first post and I hope that I have made the problem clear enough for everyone to understand. Thank's for any help