PH meter pH meter referred to by the electrodes and electrical meter two parts. Use if you can reasonably maintain the electrodes, the required preparation of standard buffer and proper operation of electric meter, can greatly reduce the pH value of the error is shown to improve chemistry experiments, medical laboratory data reliability. First, the proper use and maintenance of the electrodes used in the lab are currently electrode composite electrode, the advantage of ease of use, is not affected by oxidizing or reducing substances, and the balance faster. In use, the upper electrode of the liquid inlet sleeve lower end rubber boot and rubber sleeve are all removed, to maintain the hydraulic pressure difference between the internal electrodes potassium chloride solution. Put the following simple use and maintenance of the electrode as an introduction: ⒈ composite electrode when not in use, can be fully immersed 3M potassium chloride solution. Avoid using the washing liquid or other water absorption dip reagents. ⒉ before use, check the front of the glass electrode bulb. Under normal circumstances, the electrodes should be transparent and no cracks; within the bulb to be filled with a solution, not a bubble exists. ⒊ when measuring large concentration, try to shorten the measurement time, carefully cleaned after use to prevent the adhesion test solution on the electrode and electrode contamination. ⒋ after cleaning the electrodes, do not wipe with paper glass membrane ph meter, and the application of dry filter paper, to avoid damage to the glass film to prevent cross-contamination, affect measurement accuracy. Note ⒌ measurement electrode silver - silver chloride internal reference electrode should be immersed into the bulb chloride buffer solution in principle ph meter, electric meter display section to avoid the emergence of digital bounce phenomenon. When using ph meter maintenance methods, attention will be lightly thrown a few electrodes. ⒍ electrode can not be used for acid, alkali or other corrosive solution. ⒎ dehydrated medium is strictly prohibited, such as ethanol, potassium dichromate, etc. are used. PH meter use 1. Open the back cover, insert the battery one. 2. Replace the composite glass electrode: 3. Turn on the power switch after use ph meter, call the PH measurement files. 4. Measure the temperature with a thermometer PH6.86 standard solution, and then the PH meter knob to lower the temperature compensation of the measured temperature value. 5. The composite electrode with deionized water rinse, and dry with filter paper. 6. PH6.86 standard solution was poured into 2 ~ 5ml of water for wash and dry plastic beaker, and the beaker was washed after the composite electrode drained, and then added 20mlPH6.86 standard solution in a plastic beaker, the composite electrode inserted into in solution, with the instrument positioning knob to adjust the reading 6.86 until stable. 7. Wash the composite electrode with deionized water, dry with filter paper, using a thermometer to measure the temperature of the solution PH4.00 and temperature compensation knob to the next instrument measured temperature value. 8. PH4.00 standard solution 2 ~ 5ml into another plastic beaker, after washing the beaker and the composite electrode drained, then add 20mlPH4.00 standard solution, the composite electrode into the solution, the reading is stable, with the slope of the knob adjusted PH4.00. After adjustment knob should be noted that the slope, and never move again. 9. Determination of the test solution temperature with a thermometer, and the instrument is adjusted to the temperature measured temperature compensation. 10. The composite electrode inserted into the test solution, read the PH, PH value is the test solution. 11. Note: The instrument must be calibrated before use, that is more than 4 to 8 operation. If the instrument is turned off, can be continuously measured, once the shutdown is necessary to calibrate. But 12 hours, if not shut it must be calibrated once. ph _ hundred dollars to use technology (certified) _ph hundred dollars offered by Changzhou Technology Limited. Changzhou one hundred Technology Limited (www.czbckj.com) Jiangsu Changzhou, chemical instrumentation leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In one hundred as a technological leader with the staff warmly welcome all inquiries negotiations to create one hundred to a better future technology.