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The extra probe is brand new, so its slot's internal structure is quite compact and not yet expanded, making the initial insertion challenging. When replacing the probe, please be patient and carefully align the connector. Gently rotate it to the correct angle before inserting it. Do not use excessive force.
Note:
- If the automatic calibration encounters an error and displays values that are clearly incorrect, performing a factory reset is the simplest and most efficient solution.
- If the automatic calibration encounters an error in recognizing values, you can remove the battery cover, place the electrode in the calibration solution, and wait for the value to stabilize. Next to the battery, there is a flathead screw. Use the provided screwdriver to rotate it left or right to adjust the value（ph meter's probe should put into calibration solution）.
- Performing calibration in the air by pressing and holding the [TEMP/CAL] button is incorrect and will display "DEL" on the screen. If this happens, perform a factory reset and then recalibrate in the pH calibration solution.
How to Perform a Factory Reset?
To perform a factory reset, press and hold the [TEMP/CAL] and [HOLD] buttons simultaneously for 5 seconds. This can be done in the air or in a liquid, but calibration must be done in the calibration solution.
Note: If the automatic calibration encounters an error and displays values that are clearly incorrect, performing a factory reset is the simplest and most efficient solution.
How to Calibrate the pH Meter?
- The pH meter can be calibrated in two ways: automatic calibration and manual calibration. Typically, automatic calibration is sufficient. If automatic calibration does not yield accurate values, you can first perform a factory reset. Alternatively, you can keep the pH meter in the calibration solution and use the included screwdriver for manual calibration.
- a. Factory Reset: To perform a factory reset, press and hold the [TEMP/CAL] and [HOLD] buttons simultaneously for 5 seconds. When the screen displays "DEL," release all buttons to complete the factory reset.
- b. Automatic Calibration: Select a calibration powder (pH 4.01, 6.86, or 9.18).Dissolve the powder in 250 ml of distilled water.Insert the probe into the solution and press [TEMP/CAL] for 6 seconds. When the screen displays "CAL," release the button and be sure to wait until the value stops flashing (flashes three times) before removing the pH meter. Calibration for pH meter is now complete. Follow the same steps for all pH calibration powders. If the value deviates by more than 0.2 after the first calibration, you can recalibrate in the calibration solution.
- c. Manual Calibration（ph meter's probe should put into calibration solution）: If automatic calibration encounters an error and shows significantly incorrect values, performing a factory reset is the simplest solution, but you can also manually calibrate. For manual calibration: remove the battery cover, place the electrode in the calibration solution, and wait for the value to stabilize. Adjust the flathead screw next to the battery using the provided screwdriver. Once the value is close to the calibration solution's pH value, you can then perform automatic calibration.
What Is the Function of the [HOLD] Button?
The [HOLD] button helps to hold the detected value. After completing the pH measurement, you can press the [HOLD] button to keep the data displayed. This allows you to remove the pH meter from the sample and then record the pH value. The [HOLD] button makes it more convenient to use. Once you have recorded the pH data, press the [HOLD] button again to return the pH meter to its detection mode.
Claudia
Reviewed in the United States on September 21, 2024
Having an acurate PH reader is very important to me because I make my own soaps, creams, cosmetic creams for my household. I spent more on this one because I hoped it would provide a higher level of acuracy, but it didnt. The reviews are mostly superficial, in my opinion, as they do not go to real accuracy of the product. Just sticking the stick in your product and getting a reading is not enough. That just tells you the battery works. Understand this. I can understand if its a little off, but come on! Such a waste of time. So disappointed:(
Super Popps
Reviewed in the United States on September 10, 2024
I use this meter to keep track of the pH when dying yarn and fabrics. It works well out of the box and I compared the reading to another meter I have. The readings are very close to one another so while there is a margin of error, it is acceptable for my purposes. The calibration instructions are severely lacking, however, with the instructions being identical for each of the three calibration test pH pots. That might be okay, but the unit doesn't follow along with the instructions. Once you calibrate the first time, it doesn't change for the other calibrations. I ended up resetting to factory default and it worked okay again. The unit works well, but you might want to find instructions online or somewhere.
Anonymous Reviewer
Reviewed in the United States on August 18, 2024
Making sourdough bread apparently requires a lot of chemistry and I got the pH meter for my mom in her new quest to bake sourdough from scratch. She said it seems accurate, as she's compared it in liquids with pH strips.
Customer Review
Reviewed in the United States on July 26, 2024
So far I'm pretty happy with this meter. It beats trying to use the pH strips for my cheese. It was supposed to come calibrated so I haven't actually tested it in the solutions but I guess I better. I did test it side by side with ph strips and I thought it did just fine.Granted, I wouldn't use this in a laboratory, but for my home cheese making it's just fine.
J. Harris
Reviewed in the United States on June 23, 2024
This is a very interesting pH measuring device. It comes with two identical pH probes, three sachets of powder to prepare three different pH Calibration Solutions (pH=4.01, 6.86, and 9.18), a tiny screwdriver, and a very small instruction booklet.The first thing I wanted to do was to calibrate the instrument using shelf-stable pH buffer solution I had bought, but after reading the very small instruction booklet, I found that is simply not possible. That is because the instrument ABSOLUTELY MUST be calibrated using the three different pH Calibration Solutions one must prepare with the three included sachets of powder. This is necessitated by the fact that the pH calibration process is hard coded into the device's firmware and cannot be changed. Why would anyone do this? Interesting, very interesting.Since the instrument came with a replacement pH probe, I removed the pH probe installed on the instrument so that the replacement pH probe could also be tested. I immediately noticed that the replacement pH probe did not have the O-ring to seal the pH probe to the body of the instrument. Did they really expect that I would/could remove the teeny tiny O-ring from the original pH probe and re-install it on the replacement pH probe? This is not very likely due to the fragile nature of such O-rings. Moving on, I found the replacement pH probe extremely difficult to install on the instrument body. I did succeed, eventually, with great care and I determined that the connector in the pH probe was mis-aligned in the pH probe body by the manufacturer. Nevertheless, I was finally able to get it installed and calibrated.I then went to measure several solutions for pH, including the pH buffer solutions I bought. The data obtained was not steady using either probe. Thinking back to my undergraduate B.S. degree in Chemistry, I treated each pH probe with a KCL electrode storage solution and the problem got better after some time (about 30 minutes). This begs the question, "Why were the probes not stored in a KCL solution?" Every pH probe I have ever purchased or installed came stored in a KCL solution.Finally, I reinstalled the original pH probe (the one WITH the O-ring), turned the instrument off, covered the probes with the supplied plastic sleeves, and put everything back into the box. I will be looking for a way to store the pH probes in the KCL solution in the future, I will order more of the REQUIRED pH Calibration Solution sachets, and I will study the very small instruction booklet, again. Perhaps I may even discover what the tiny screwdriver provided is to be used for.This could have been a much better experience. I am not sure just how useful this instrument will turn out to be. I am not very happy with this product.
Scott G
Reviewed in the United States on December 30, 2024
First and foremost, they claim the unit is calibrated from the factory, which is a lie. Mine gave readings all over the place from 6 to 8 pH in distilled water. Second, they give you calibrating "powder", which has to be mixed with ionized water in order to be effective as a calibrating tool. Completely useless. I gave up on this unit and ordered a pH meter from APERA, which included calibration SOLUTION, not powder, which made setting up and taking accurate measurements quick and easy. And they DIDN'T lie to me about the unit being pre-calibrated from the factory - the manual says calibrate before you use it, and store it with some of the calibration solution in the cap to maintain sensitivity.Either way, the ease of use on the APERA unit blew this piece of crap away. I threw it in the garbage, where it belongs.
C. G. Wolgamot
Reviewed in the United States on November 23, 2024
Don’t really care for product. Can’t use on hot food. Instructions are pretty worthless. The reading is so up and down. Not too functional as I’d rate the quality as poor.
Tara
Reviewed in the United States on October 1, 2024
This probe is mediocre at best. If you need accuracy, don't trust this probe. It is not worth the cost.
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