hello,

i'm trying to calibrate all the sensors.
but it don't works.
it says for example the temp "you want to calibrate"i say yes . and than is it finish "would you save"
my temp is 3 deg off
if ill want to calibrate ph . i can say with fluid . and than calibrate . but he is not saying put in fluid 2 .

like something is missing
why can't i calibrating with the ghl control center


please help me.

greetings Huub