Ph probe reading 0

[ÉricB]

Hello,

[font=Tahoma, Verdana, Arial, sans-serif]I get some [/font][font=Tahoma, Verdana, Arial, sans-serif]w[/font][font=Tahoma, Verdana, Arial, sans-serif]eird reading each hour or so on my ph probe.... [/font][font=Tahoma, Verdana, Arial, sans-serif] see [/font][font=Tahoma, Verdana, Arial, sans-serif][size=small][size=small][font=Monaco, Consolas, Courier, monospace]19:55:42 [/font][/size][/font][/size][font=Tahoma, Verdana, Arial, sans-serif]below![/font]

I use this ph probe (https://aquariumdepot.ca/products/american-marine-pinpoint-ph-probe?_pos=1&_sid=21009e1f5&_ss=r) which is supposed to be a dual junction

I try to calibrate the probe... but still same thing...

any idea?
thanks

Jan 26 19:45:42 reef-pi reef-pi[401]: 2023/01/26 19:45:42 ph sub-system: Probe: ph Reading: 7.51
Jan 26 19:46:42 reef-pi reef-pi[401]: 2023/01/26 19:46:42 ph sub-system: Probe: ph Reading: 7.479999999999999
Jan 26 19:47:42 reef-pi reef-pi[401]: 2023/01/26 19:47:42 ph sub-system: Probe: ph Reading: 7.51
Jan 26 19:48:42 reef-pi reef-pi[401]: 2023/01/26 19:48:42 ph sub-system: Probe: ph Reading: 7.51
Jan 26 19:49:42 reef-pi reef-pi[401]: 2023/01/26 19:49:42 ph sub-system: Probe: ph Reading: 7.51
Jan 26 19:50:42 reef-pi reef-pi[401]: 2023/01/26 19:50:42 ph sub-system: Probe: ph Reading: 7.51
Jan 26 19:51:42 reef-pi reef-pi[401]: 2023/01/26 19:51:42 ph sub-system: Probe: ph Reading: 7.51
Jan 26 19:52:42 reef-pi reef-pi[401]: 2023/01/26 19:52:42 ph sub-system: Probe: ph Reading: 7.51
Jan 26 19:53:42 reef-pi reef-pi[401]: 2023/01/26 19:53:42 ph sub-system: Probe: ph Reading: 7.51
Jan 26 19:54:42 reef-pi reef-pi[401]: 2023/01/26 19:54:42 ph sub-system: Probe: ph Reading: 7.51
Jan 26 19:55:42 reef-pi reef-pi[401]: 2023/01/26 19:55:42 ph sub-system: Probe: ph Reading: -0.3600000000000003
Jan 26 19:56:42 reef-pi reef-pi[401]: 2023/01/26 19:56:42 ph sub-system: Probe: ph Reading: 7.5
Jan 26 19:57:42 reef-pi reef-pi[401]: 2023/01/26 19:57:42 ph sub-system: Probe: ph Reading: 7.5
Jan 26 19:58:42 reef-pi reef-pi[401]: 2023/01/26 19:58:42 ph sub-system: Probe: ph Reading: 7.5
Jan 26 19:59:42 reef-pi reef-pi[401]: 2023/01/26 19:59:42 ph sub-system: Probe: ph Reading: 7.5
Jan 26 20:00:42 reef-pi reef-pi[401]: 2023/01/26 20:00:42 ph sub-system: Probe: ph Reading: 7.5
Jan 26 20:01:42 reef-pi reef-pi[401]: 2023/01/26 20:01:42 ph sub-system: Probe: ph Reading: 7.5
Jan 26 20:02:42 reef-pi reef-pi[401]: 2023/01/26 20:02:42 ph sub-system: Probe: ph Reading: 7.5
Jan 26 20:03:42 reef-pi reef-pi[401]: 2023/01/26 20:03:42 ph sub-system: Probe: ph Reading: 7.5
Jan 26 20:04:42 reef-pi reef-pi[401]: 2023/01/26 20:04:42 ph sub-system: Probe: ph Reading: 7.5
Jan 26 20:05:42 reef-pi reef-pi[401]: 2023/01/26 20:05:42 ph sub-system: Probe: ph Reading: 7.5

 

[ÉricB]

absolutely not
:-D
Don't worries about the resistor! It's always useful to have!

thanks for the board.

 

[Rob F]

I have a feeling you won't find it if you need it again. I'm also known to be a little stubborn.