pH reading way low after probe cleaned

[TWYOUNG]

I had to replace my Apex necessitating a reinstallation and calibration of my pH probe. Since it had stuff growing on it I cleaned it by soaking in sodium citrate. Since installing it has been reading in the mid 7's when it previously was 8.1 to 8.4. I've calibrated it twice. This morning it read 7.5 while my Hanna was 8.3. Did cleaning it cause this issue?

 

[blaxsun]

When you recalibrated, did you float the packet of calibration fluid?

 

[TWYOUNG]

When you recalibrated, did you float the packet of calibration fluid?

Temperature acclimated yes. At first I thought the acidic cleaning solution could have caused a temporary lowering of the probes reading but it's been several days now.

 

[blaxsun]

Temperature acclimated yes. At first I thought the acidic cleaning solution could have caused a temporary lowering of the probes reading but it's been several days now.

I don't know if this will work for the pH probe, but when I had an issue with my salinity probe - I performed these actions (per Neptune):

1. Disable the pH probe and then unplug it.
2. Reboot the Apex (with the pH probe still unplugged).
3. When you can log back in, reconnect the pH probe.
4. Re-enable the pH probe.
5. Recalibrate.

 

[TWYOUNG]

I don't know if this will work for the pH probe, but when I had an issue with my salinity probe - I performed these actions (per Neptune):

1. Disable the pH probe and then unplug it.
2. Reboot the Apex (with the pH probe still unplugged).
3. When you can log back in, reconnect the pH probe.
4. Re-enable the pH probe.
5. Recalibrate.

What do you mean by, "disable the pH probe"? How do I do that?

 

[blaxsun]

What do you mean by, "disable the pH probe"? How do I do that?

Through the probes menu (the one with the temperature icon), select the pH probe and disable it.

 

[TWYOUNG]

Through the probes menu (the one with the temperature icon), select the pH probe and disable it.

YES!!!! Thanks so much. It worked!

 

[blaxsun]

YES!!!! Thanks so much. It worked!

Glad to hear this 'trick' worked for you. :beaming-face-with-smiling-eyes:

 

[TWYOUNG]

Glad to hear this 'trick' worked for you. :beaming-face-with-smiling-eyes:

lol, thanks again.

 

[ataller]

lol, thanks again.

Bump this worked for me too.

 

[juden99]

Thank you so much! This worked for me also!