Dear support team,

I did two measures with the GHL ALK/dKH reference solution (7.5 °dKH) and results were 7.9 and 8.0. The tolerance of the solutions is +/- 0.2 °dKH. Probe and doser pump were calibrated before the measures.

Could you please tell to me the reason of this values? Is the KHD working bad?

Thanks in advance.

Regards,
Oscar Sánchez.