Quote Originally Posted by tomcromp
does any one have any experience caliberating this ph meter ive lost the instructions and cant find them anywhere!
It's simple just put your PH meter in the calibration 7.0 stir it and leave it for a minute or two if your meter shows 7.0 its ok the same with the 4 if it shows4.0 thats fine.
there should be two small screws somewhere on the meter with 7 and 4 next to them, they are used to ajust your calibration if it needs ajustment.
Meter in fluid 7 ajust to 7.
Meter in fluid 4 ajust to 4.
Meters are very sensitive so be carefull when ajusting the screw, be gentle.
I check my meter for accuracy once a month.
You can buy probe cleaning fluid to clean the probe on your meter.
One more thing don't cross contaminate any of the fluids.
Hope this helps.