The Ohaus pH Meter is a powerful laboratory pH meter that ensures the accuracy and convenience of measurement and has a wide range of functions to meet your diverse needs. As a professional supplier of Ohaus, Shanghai Bashu will analyze the operation instructions of Ohaus pH meter to make it easier for you to use!
The pH of the sample is generally determined by the laboratory as follows:
1. pH electrode preparation and cleaning - pH buffer preparation and pH electrode calibration - sample preparation and pH electrode cleaning - sample pH measurement - sample pH reading end point confirmation - data recording or printing.
Preparation and cleaning of pH electrode: When the pH electrode is stored, the electrode tip will be screwed in the protective bottle. When using it, the bottle should be unscrewed first, and then the cap will be relatively easy to move up or down.
If you have an independent electrode holder from Ohaus, you can place the protective bottle in the groove of the separate electrode holder to avoid accidentally knocking over the protective bottle. Protect the bottle with a 3M KCl solution. The pH electrode tip should be rinsed with pure water before use. Absorb the moisture with absorbent paper. Do not rub the electrode bulb with paper.
2, calibration: calibration buffer group, one point calibration, two points and three points calibration, according to each
3. Sample measurement:
(1), pH measurement - the electrode needs to be calibrated before measurement and confirm that the state is good before the sample pH value can be measured. Place the electrode in the sample solution and press the READ key to start the measurement. Confirm the end point automatically or manually. If the repeatability is poor in the automatic end point mode, it is recommended to use the manual end point mode. Sometimes reproducibility is caused by the use of common electrodes for special samples (such as juice, milk, distilled water, tap water, etc.), which requires a dedicated pH electrode. For application and selection of pH electrodes, please consult relevant personnel or technical support. The pH value of tap water is not consistent everywhere, and tap water is usually a low ionic strength system. The ordinary pH electrode has a long time to reach a stable reading, and the repeatability is poor, and it cannot be used to judge whether the electrode or the meter is good or bad.
(2) Perform mV or ORP measurement - short press the pH/mV button to switch between mV mode and pH mode. The mV measurement operation is the same as the pH measurement. Calibration cannot be performed in mV mode. For ORP (redox potential), that is, Redox measurement, it is necessary to connect and use an ORP electrode (such as STORP1) to measure the corresponding mV value.
(3) Temperature measurement - In order to improve the measurement accuracy, it is recommended to use a 3-in-1 pH electrode with a built-in temperature probe. For example, it is recommended to use a 2-in-1 electrode with a temperature electrode (STTEMP30). When using a temperature probe, the screen will display the ATC symbol and sample temperature.
4, use the memory: store readings, retrieve stored data, clear stored data
5, print:
The Ohaus pH meter can be connected to the printer to print measurements, calibration results and stored readings. It is recommended to use Ohaus printers (eg SF-F40A) to avoid compatibility issues.
The above is the entire contents of the "Ohaus Gasoline Operation Instructions", if you want to know more about the Ohaus acidity meter information, you can contact Shanghai Baqi Industrial Co., Ltd. at any time!
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