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#1 (**permalink**) 04-25-2008, 01:27 AM

Hey I just got a new PPM meter and I put it in the 1382 PPM solution I got with it and the highest reading I can get by twisting the screw to calibrate is exactly 1082 PPM. I'll probably send it back but I'm lazy and wondering if I can just subtract 200PPM from any reading I get. Any input?

#1 (permalink) 04-25-2008, 01:27 AM
hwhobbs Guest Posts: n/a	PPM Meter wont calibrate right.... Hey I just got a new PPM meter and I put it in the 1382 PPM solution I got with it and the highest reading I can get by twisting the screw to calibrate is exactly 1082 PPM. I'll probably send it back but I'm lazy and wondering if I can just subtract 200PPM from any reading I get. Any input?