Hello All,

I hope that I have the right tag. I am a bit rusty and hope that some=20
one would point me in the right direction.

I am designing a TDS meter.

For a TDS of 2500, I get a frequency of 6500 Hz and for a TDS of 30, I=20
get a frequency of 400 Hz.

My 2 points of calibration are those below.

6500 Hz - 2500 TDS
400 Hz - 30 TDS

I need a formula to calculate the intermediate values based on the=20
incoming frequency.

Thanks in advance

Cheers

Ravi

--=20
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