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 Set potetiometer for LND712		  New Topic  Reply to Topic
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ska

10 Posts
Posted - 10/03/2012 :  05:12:26  Show Profile  Reply with Quote
Hi
I can't set voltage directly, so I need to know in which resistance I sould set the potentiometer to have 500V?
Thanks
Reply #1

ZLM

1271 Posts
Posted - 10/07/2012 :  10:53:38  Show Profile  Reply with Quote
You need to check the voltage by a regular 11M ohm internal resistance multimeter. Serial a 1G ohm resistor on your multimeter prob. Read the voltage frm the multimeter with 20V range.

And then calculate the actual voltage by following formular:

V(actual) = V(DMM read) x ((R(meter) + R(probe)) / R(meter))

Here:
Voltage = V(reading from multimeter) * 91.9

if your multimeter reading is 4.2V, then the actual voltage is 4.2*91.1 = 382.62V
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