PH pen issues

[Camplazlo]

Ive decided to see if my ph pen is out ive got the hygen ph buffer 7 and 4 and im using ro water to rinse it i put the pen in the ph 7 solution and it reads 7.5 but when i put it in the 4 solution it reads 4.0 how do i fix this ? Cheers

 

[SamSmith]

Should be a method for calibrating it. The more expensive models have a calibration mode. The cheap ones have a small screw you adjust with a jeweler's screw driver. Check the manual that came with the pen.

 

[Camplazlo]

Should be a method for calibrating it. The more expensive models have a calibration mode. The cheap ones have a small screw you adjust with a jeweler's screw driver. Check the manual that came with the pen.

Thanks mate cheers for the reply fixed it.

 

[Rifleman]

If you're using one of the cheap pens calibrate it at least every 2 weeks until you "learn" it's tendencies. Some will run high/low after a few uses and have you chasing problems later.

I went through 4 of the cheap ones before I got angry enough to lay down the dollars for a BlueLab. Now I rarely use it unless I'm having a problem. pH Perfect works once you figure it out.