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Press CAL Key once. The preprogrammed calibration weight value for the balance will appears on the display, ie: 100.00 (VWR-124B) and flash. Place the appropriate calibration weight (gram) for your balance (see chart below) within 2 Seconds.
If the arrow icon points to the top line and the displayed units are pH, pressing the key will start a pH calibration . Each time the key is pressed in the calibration mode, the meter will accept the calibration point and move to the next point until the maximum number of calibration points are reached .
Submerge the tip of the electrode in the solution for 5 to 10 minutes to dissolve or loosen and build-up on the pH sensitive glass. Rinse the electrode with potable water then submerge in storage solution for another 10 minutes prior to using the electrode.
Soak the pH electrode in cleaning solution 220 or 0.1M HCl for at least 1 hour. Oily samples Soak the pH electrode in warm, diluted detergent solution for 5 to 10 minutes, while moderately stirring the solution. Alternatively, rinse the pH electrode with methanol or ethanol.
1:27 4:14 Itself instead Wick any droplets of water away from it with the wipe. The calibration should beginMoreItself instead Wick any droplets of water away from it with the wipe. The calibration should begin with the ph7. Buffer submerge the electrode in the buffer.
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Calibration and Measurement Before and after measurement, rinse the pH electrode with clean water and/or with a portion of the next solution to be measured and blot with soft lint-free tissue to remove excess water or solution. Rinsing between measurements prevents contamination by carry-over on the electrodes.
Storage. For best results, the pH soaker bottle should be filled with a pH electrode storage solution (SC-3507). Do not store the electrode in distilled water as this will decrease the life of the electrode. Add pH 4 buffer solution up to 100 ml and properly mix until the solid is completely dissolved.
0:27 1:41 It doesnt really look like a zero were going to slowly bring it on up not three or four. But wereMoreIt doesnt really look like a zero were going to slowly bring it on up not three or four. But were getting pretty close i would say maybe 6 and 1/2 or 7 is the pH of this. Water.

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