Temp and PH probe replacement

kjdeut · 11-01-2006, 03:42 PM

Is there a recommended tiem frame on replacing a controller's probe, specifically the temp and PH probes used with an AC jr?

Ken

David Grigor · 11-01-2006, 04:26 PM

Temp probe does not need to be replaced unless you pinch the wire or something. If well kept should last. However, I will say I did have one go out ( I crimped it although no visable damage when I was pulling som other cords out and got caught so good lessen to keep cords organized ). When they go out usually will create a very high temp reading 100+ when that happens fans say on and heater never cuts on. What I would do is add a command the if temp > 100 then fans off. In the wintertime at least your not adding insult to injury. The probes are only $15 or so, may be a good idea to have a replacement on hand especially if you own multiple units it makes sense. Now that I think of it I should do that.

PH probe where is no real set time. Once it gets to where it can't be calibrated anymore is when it needs to be replaced.

kjdeut · 11-01-2006, 08:30 PM

Thanks David. Are there any suggested/recommended period for recalibrating the PH probe?

David Grigor · 11-01-2006, 09:51 PM

The calibration fluid keeps if you store it in an air tight container. To make it easy to remember I just time it with changing out my RO filters every 6 month-ish.

mattb · 11-02-2006, 10:12 AM

I recalibrate monthly...

David Grigor · 11-02-2006, 10:19 AM

How far off does it get from one month to the other ? I personally don't depend on the PH meter for much of anything except for the extreme highs so off a few hundredths isn't significant. Not attempting to control a CA reactor or anything with it.

kjdeut · 11-02-2006, 10:43 AM

Thanks guys. I have been seeing some higher then usual PH readings and I want to check the more obvious reasons before i start digging deeper.

Ken

David Grigor · 11-02-2006, 10:51 AM

Yeah I would question the probe. This time of season most people are fighting lower PH due issues from CO2 levels in the home.

mattb · 11-02-2006, 12:47 PM

Yeah, I used to use the pH probe more... I only watch alkalinity now. You'd be surprised how long a probe will be properly calibrated.... I was finding that I'd be off .1 or .15 after a month. I used to log that stuff much more frequently and draw pretty charts...