View Full Version : ph probe

01/20/2012, 09:25 PM
I unplugged my Ph probe will I have to re calibrate it?

01/20/2012, 09:32 PM
Probably not. Plug it back in and see if it reads right.

01/20/2012, 11:37 PM
Helps if it's plugged into the correct port.

01/21/2012, 06:54 AM
Helps if it's plugged into the correct port

More than you probably realized!

For the future, the unique calibration values of a probe like your pH probe, are stored in the module's memory. So you can unplug your probe and as long as you plug it back into the same module/port, you are fine. No recalibration is required. However, if you took a probe from a PM2 module and plugged it into your base module, that probe would require recalibration because its signals would be modified by the calibration values in the base module which would not necessarily be the same as the PM2 it came from.

An INITIALIZE ALL will erase those probe calibration values. A firmware upgrade will not. If Neptune replaces your module due to a defect, you will need to recalibrate as well.

01/21/2012, 09:56 AM
Thanks All. I think I've got to recalibrate it's giving me a low reading. Maybe from putting it in the wrong port or hitting recalibrate on the setup screen. Thanks for the info