Hello, I have a problem. I operate the HACH HQ4100 device and put its PH electrode in it. When I perform a clapration of the device, unfortunately, the device only reads Buffer 7 and does not read Buffer 4 or Buffer 10. The device is fixed to Buffer 7 only, knowing that this is the first time I have run the device. Please help
Hello, I have a problem. I operate the HACH HQ4100 device and put its PH electrode in it. When I perform a clapration of the device, unfortunately, the device only reads Buffer 7 and does not read Buffer 4 or Buffer 10. The device is fixed to Buffer 7 only, knowing that this is the first time I have run the device. Please help