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14-01-2007, 04:53 PM | #1 |
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PH Pen calibration
Please help, when you do calibration on your PH pen, would you use both PH 4 solution and PH 7 solution or...... either one will do?
Thank you very much. |
14-01-2007, 05:00 PM | #2 |
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14-01-2007, 05:26 PM | #3 |
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Unless you need very precise calibration to ensure that the pH pen is accurate for a very wide range of pH, just get the pH 7.0 solution.
There are other solutions available but you don't need to worry about those. -Calvin |
14-01-2007, 05:48 PM | #4 |
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14-01-2007, 06:05 PM | #5 |
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You too bro, both of you like a guru here to guide new bee like me, thanks a lots.
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14-01-2007, 07:42 PM | #6 |
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It depens on which model of your pH pen, some are 2 points calibration, some r 1 point. In all cases, 7.0ph as a single solution can be used for 2 points and 1 point model for 1 point calibration.
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15-01-2007, 12:08 AM | #7 |
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What is the cheepest pH pen out there i can get? Feel like getting one.
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15-01-2007, 09:45 AM | #8 |
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In my experience, try to get those cost in range from $30-$70 is fine, quality & reliability issue, concern.
For used PH pen, u may want to consider my offer here clik the link to see http://www.arofanatics.com/forums/sh...37#post4922537 Last edited by thuac; 15-01-2007 at 09:58 AM. |
15-01-2007, 09:59 AM | #9 |
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PH Pen Calibration
Hi, bro sorry about making use of ur thread here but since all of u are talking about calibration, I have a question here, that is, when I do calibration of the PH pen to 7 and use it to test my water. After that, when u take out from the water after testing, will the reading go back to 7 again or must I everytime had to do calibration when I want to test water again?
Please advise. Thank |
15-01-2007, 11:51 AM | #10 | |
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