Re: [APD] CO2 and pH control

[Gordon and Susan Watkins <gwatkins at ritternet_com>]

I was incorrect - calibration was in fact to 7.0

Gordon

Laith Arif wrote:

>Usual single point calibration is to 7.0, not 7.2.  Dual point calibration
>is usually to 7.0 and either 4.0 or 10.0.
>
>First I've heard of calibrating to 7.2... maybe this could be part of the
>problem?
>
>Laith
>
>
>-----Original Message-----
>From: Gordon and Susan Watkins [mailto:gwatkins at ritternet_com] 
>Sent: 13 December 2005 22:38
>To: aquatic plants digest
>Subject: Re: [APD] CO2 and pH control
>
>...
>
>    The SMS122 controller is new and I calibrated it to 7.2 upon setup a 
>week or so ago. The reading correlates with chemical pH tests so I'm 
>confident in its accuracy.
>
>...
>
>
>
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>  
>
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