gaskatel Mini-HydroFlex Bedienungsanleitung Seite 19

3. Checking Mini-HydroFlex
If you want to check Mini-HydroFlex, we recommend the standard calomel electrode or,
if necessary, the silver silver chloride electrode.
We recommend the following solutions as measuring solution:
Hydrochlorid acid
Hydrochloric acid/citric acid
Citric acid/sodium chloride/sodium hydroxide solution
The potentials given refer to the standard calomel electrode at 25 °C.
EN - Page 6
pH 0 244 mV
pH 2 362 mV
pH 4 480 mV
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