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#2
07/21/2007, 09:32 PM
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Did your monitor come with any buffer solutions? It's hard to make something from scratch, unless you've got an accurate scale and pure reagents.
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Jason Nugent Reefcentral Moderator "I have heard of a place where humans do battle in a ring of Jello." |
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#4
07/21/2007, 10:11 PM
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was the probe allowed to dry out, or was it still in storage solution [4.0 calibration fluid]? Replacing the probe might be the safest course, and go ahead and order calibration fluids [10.0 or 4.0 and 7.0]. At $0.99 a pack its not that bad, and you only need to do it once a month, really.
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"Well, my days of not taking you seriously are certainly coming to a middle." - Malcolm Reynolds |
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#5
07/21/2007, 10:17 PM
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I hate to buy a new probe if it is not needed. It is reading 7.69 in my tank now, sounds like the probe is working, may just need calibrating? Sounds like I need to order the calibration solution and see if I can calibrate it before ordering a new probe.
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#6
07/21/2007, 11:13 PM
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For saltwater, you should calibrate from 7 to 10. If you calibrate from 4 to 7 it will be off when measuring in the range of 8. There are 2 linear slopes with pH monitors. One is from 4 to 7 and the other is from 7 to 10. Calibrating from 4 to 10 will not work. You won't get it to repeat at the upper and lower values. It is important to calibrate within the range you will be measuring.
If the probe is spent, you will notice it drifting all around. Probes have a limited lifespan which is decreased if not stored properly (kept wet). You can get calibration fluid at any Grainger by the bottle.
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"So this is how liberty dies....with thunderous applause." ~ Padme' ~ (Star Wars Episode III) Last edited by jdjeff58; 07/21/2007 at 11:25 PM. |
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Linear Mode
