Can't calibrae pH

[tommy]

Hi,

I have a PIII with firmware 5.1.00. I'm trying to find how to calibrate my pH probe but can't find it anywhere.

I go to Probesettings> pH probe> .... (here should it be if i follow the information on the internet, but can't find it)


kind regards,
Tommy

[GHL Support]

Perhaps the sensor input is disabled.
The sensor has to be enabled before you could calibrate it (Sensorsettings->pH value->Activity->Sensor active = yes)

[tommy]

ok, thanks! it was enabled, but re-enabled did it.

But, when i put the sensor in 4,01, it gives 4,01. When i put it in 7,01 it gives 7,01.In the tank it gives 10,5+! seems impossible to me, corals are doing fine like always

[Wirus]

For sea water you should calibrate the probe with ph 7/9 not with 4/7 which is for fresh water.

[tommy]

ok, i will try that. Thanks

[mallyhod]

Hi what calibration fluid should i use for the the probe in the calcium reactor? i use 4.01 and 7.00 or do i need to use 7.00 and 9.00 this is for a reef tank

[Matthias]

depends on the pH value you want to achieve: the calibration fluids should cover this range

[aqua_digital]

For a calcium reactor as you are wanting a controlled value of less than 7 (nominal value set to 6.5 or less) you would use pH 4 and pH7 calibrations