WQM-303 Pentype Multi-Paramater 5-in-1 Water Quality Tester (pH / TDS / EC / Temp / Salinity)

Would you please tell me the reset procedure? It will be wonderful if you can provide a video on how to reset it.

Why the pH value is buffering and dont become stable after rinsing it with distilled water? It is not showing accurate value. How can i solve this?

Is it okay to calibrate it with adwa ad70030 ec standar 12880 uS/cm solution to calibrate it? Or do i have to use any specific 12.88 solution?

"Regarding calibration, we recommend calibrating the pH every 2-3 days if the product is used frequently " seriously ? that buffer solution is not free

For tds/ec/salt do i have to calibrate it only with 1413 and 12.88 conductivity solution? Or do i have to calibrate seprately for ec, tds, salt respectively using other calibration solution ?

I think I got a dud. The temperature and PH results jump around and when I calibrated the 9.18 solution showed as 6.86

How long Last 1 Electrode Probe ? ❗

Hi, This is how to calibrate but how to test the pool water and what should each ideal reading level should be, Also if we have to calibrate after each use or even 5 uses then going back to liquid testing kit is the go. Thanks

Need operating instructions for a beginner, not calibration. First, HOW TO USE to conduct each test.

After the ph calibration is the tds is also calibrated or do i need another buffer powder to calibrate tds?

The ph number keep jumping and not in 0 when I bought it. Is it normal?

bought one on ebay and I can't get a stable ph reading on it, is my electrode broken? where do I get replacement electrodes?

do you need to calibrate this if you bought brand new or is it already calibrated at the factory

Kindly do this process after each use? Or just in the beginning and then I can use it several times

Wow to reset it?

Do I need calibration for new device?

Hi. Do we need to calibrate it again in further usage?

Do I also need to calibrate the tds and EC?

How much water do I add to the packets

Please can you give me the battery number for replacement?