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--- fisher_acumet [2023/01/05 22:59] – [About] haley
+++ fisher_acumet [2023/01/05 23:09] (current) – [Fisher Acumet AB15 pH Meter] haley
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 | **Description:**                pH meter                           |
 | **Manufacturer:**               Fisher Scientific                          |
+/5/23 Haley
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 conditioned and used in accordance with manufacturer’s
 instructions."
+"Because electrodes vary in their response, you must standardize or
+calibrate your pH meter and electrode to compensate for electrode
+variation. The more frequently you standardize or calibrate, the more
+accurate your measurements. Standardize at least daily, or more
+often, for accurate results."
 ----
 ===== Operating Procedures =====
+__Setup__
   - Connect electrode arm to the base
   - Connect power cable to outlet
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   - Between measurements, store conventional pH electrodes in storage solution, pH 4 buffer, or KCI solution. Always leave the filling hole of liquid filled and combination electrodes open. Refill when the level of solution gets below the manufacturer’s recommended level.
+__Standardization__
+  - Press and release the mode key until your digital display indicates pH mode. This key toggles between the pH, mV and Rel mV modes.
+  - Press the setup key twice and then press the enter key to clear an existing standardization.
+  - Rinse the electrode with distilled water using a squeeze bottle and immerse the rinsed electrode into pH 4 (pink) buffer solution.
+  - Press std again to access the Standardization mode. The selected buffer group is displayed briefly. Wait for the reading to stabilize.
+  -  Press std again to initiate standardization. The meter will automatically recognize the buffer (4.00 not 7.00) and then return to the Measure screen.
+  - Repeat steps 3-6 with the pH 10 (blue) buffer solution. When the meter accepts the second , pH 10, buffer solution, it will briefly display the percent slope associated with the electrode’s performance prior to returning to the Measure mode. If the electrode is within the range of 90 – 102%, the GOOD ELECTRODE message will appear.
+__Measurement__
+  - Immerse electrode into solution and stir moderately.
+  - When the meter senses that the reading has stabilized, the stable icon will appear under the reading. This message will not appear if the stability indicator has been turned off during setup.
+  - You can save your reading to the meter’s memory using the save key.