Difference between revisions of "PH Meter"
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Revision as of 13:11, 10 September 2012
|This tool is currently broken, please contact the area host for more information.|
|Make/Model||Hanna Instruments HI 98127|
|Arrival Date||September 3, 2012|
|Where||Brewing Station: One|
List of Currently Certified Users
|Qualified Member||Trained By|
This instrument should be calibrated monthly using a 7.01 and 4.01 buffer solution, which is stored in the brewing cabinet with the pH meter. Initial tests should be made of the solutions and the reported values recorded prior to calibration so we can see trends. A pair of shot glasses should be used to hold buffer solution. Not much needs to be added to completely immerse the electrodes. Buffers should be thrown out after use to prevent contamination. Calibration solutions will need to be purchased periodically.
|Date||User||7.01 Value||4.01 Value|
The glass electrode must be stored wet. The electrode cap contains a small sponge. Storage solution must be used to wet the sponge. Storage solution, and an eyedropper to dispense it, are in the brewing cabinet with the pH meter. This should be attended to every week or two. The instrument should be stored in its box, vertical, with the cap down, to keep the storage solution from making a mess. Please log additions of storage solution so we know when it has been done.