French New owner PH20

I have just bought the PH20 device, that sounds to be appropriate to check the swimming pool PH.

Tried to follow the starting procedure and calibration. I hope I succeeded in it, but I am not sure.

As I have not a scientist mind, I find the instruction manual a little bit light.

So three questions are coming to me :

- Is there any instruction manual in French ?

- Do I have to enter the P2 mode at each measure ?

- Do I have to do the calibration at each measure ?

Oups it make 4 questions,

- How select the 3 points calibration mode ? Which seems to be the most useful mode to measure a swimming pool ?

Many thanks in advance.