Hello all. I am trying to measure the current of the output of a 15KV NST (Neon sign transformer) It's 60Hz, I would love to drop a coil on one of the output legs and using a VM measure a reasonably accurate current. Here's my issue. I need a calculation to find the number of turns on a ferrite coil to give me a 1v per ma output with a 30ma max from the NST as it is current limited.
The current circuit measures voltage through a 1000:1 resistive divider in oil, I tried using a 1k resistor in series with the low side of the DC output to measure 1v per ma but ended up with a really toasty VM panel meter.
Any thoughts? Ideas? Anything?
Thanks in advance,
Jim
The current circuit measures voltage through a 1000:1 resistive divider in oil, I tried using a 1k resistor in series with the low side of the DC output to measure 1v per ma but ended up with a really toasty VM panel meter.
Any thoughts? Ideas? Anything?
Thanks in advance,
Jim