PDA

View Full Version : Pinpoint PH moniter help calibrating


jay357
07/21/2006, 07:55 PM
Hello:

I bought a pinpoint PH moniter used and am trying to calibrate it. I cannot seem to get the numbers to 7 or 10 while calibrating the unit. I have the probe in the solution and am cranking the appropriate screw to adjust the display and no matter how far I turn the screw it will not reach PH 10 or 7 without adjusting the wrong screw. Does this meen that the probe is bad? Does anyone know where to buy good probes for these units for less than 50 bucks? Would home depo sell these probes?

Thanks for the help.

Jay

Billybeau1
07/21/2006, 08:17 PM
Marine Depot sells them for 44.95

jay357
07/21/2006, 09:03 PM
Do you think that its the probe that is bad? Is that what they do when they are bad?

Billybeau1
07/21/2006, 11:44 PM
If you can not calibrate the probe in the proper solution, then yes, I think the probe is bad.

You might try soaking the probe in white vinager for about 30 min. Then brush with a soft bristle toothbrush, rinse in ro/di or distillied water and try to calibrate again.

If still no good, replace probe.