Notes:

1. Due to the difference between different monitors, the picture may not reflect the actual color of the item.

Please allow slight dimension difference due to different manual measurement.

2. Manual measurement, please allow 1~2mm error, thanks

3.Don't open the dispute ,pls ,any questions ,feel free to contact with our customer service ,we can slove your problems .

4.All items don't include batteries， the reason is that the package will be returned by the logistics provider if there are batteries in the package,thank you for your understanding!(3*1.5V LR44)

Homemade distilled water:

Take a large and a small clean container (make sure the small one is extra clean), fill the large container with water (preferably hot Z water) and put the small container in it

(Do not flood the container), cover the mouth of the large container with plastic wrap and place something like a small stone in the center of the plastic wrap so that the dent is facing the mouth of the small container.

Then you can sit around and wait

Principle: After the water in the container evaporates, the water vapor meets the plastic wrap exothermic liquefaction to form water beads and then flows down the inclined plane, just falling into the small container is clean distilled water ~

Calibration with standard buffers:

1. Pour appropriate amount of standard buffer solution 6.86, 4.01 (temperature: 25C) into separate clean beakers.

2. For accurate calibration, separate two beakers for each buffer solution, one for rinses the electrode and one for calibration to minimize contamination with standard buffer solutions.

3. Tap ON/OFF to switch ON the power.

4. Put the instrument into the standard buffer, and gently shake until the value is stable, press CAL key, the instrument will enter the automatic calibration state

The value is flashing until the flashing stops and the calibration is completed.

Using pure water (PH value is 7) correction:

1. In order to calibrate accurately, two beakers should be divided into two parts. One beaker is used to rinse the electrode and the other beaker is used to calibrate to reduce pollution.

2. Tap "ON/OFF" to switch ON the power.

3, calibration, need to put the instrument in pure water, press - button, display 6.86 flashing, the instrument into automatic calibration state, the value will be flashing until flashing stop positive, the display value is 6.86. Complete calibration.

Note: The recommended calibration water temperature is 25 degrees Celsius

Calibration liquid shall be distilled or purified water (PH 7)

Tap water cannot be used, because tap water quality is complex and its PH is unstable, which cannot ensure the correctness of calibration

Note: 1. The electrode should be cleaned after use 2. PH calibration: 1 point or 2 points or 3 points automatically. If the meter cannot recognize the solution, please replace the electrode or contact the supplier. 3. It has been factory calibrated and can be used directly. 4. After completion, clean the electrode with pure water and keep it dry. 5. Stir gently a few times to ensure that there are no bubbles around the electrode. 6. Do not disassemble the meter without permission. Troubleshooting: Ph reset 1. Turn off the meter, press HOLD/TEMP and MODE/CAL at the same time, don't release it. 2.Press ON/OFF, then release all buttons, the reset is complete.

Q: What type of battery does the product use? Are batteries shipped? A: Products generally do not ship batteries, and online logistics cannot transport batteries. The type of battery is: 3 * 1.5V (LR44) button battery. Please buy it locally. Q: Is it necessary to calibrate the function of the instrument to measure "hydrogen"? A: The product has been calibrated before leaving the factory. The product cannot calibrate the function of the instrument to measure "hydrogen" by itself.

cup after electrolysis, and then measure. The hydrogen content is relatively small, and the measurement data will also display "0". Hydrogen is very easy to volatilize, and the value will continue to decrease over time.

Q: What is the unit for measuring hydrogen? How to convert measurement units? A: The factory default measurement unit of the instrument is ppb. When the instrument is turned on, press the FUN" key, and the measurement mode will be switched between ppb and ppm. (1ppm =1000ppb) Q: What should I do if the received product is damaged, cannot be calibrated, cannot work normally, and the meter cannot recognize the solution? A: Please protect the product and contact us in time to report product problems