H2S Meta-datas

The zero ppb H2S point corresponds to a non zero voltage value. This association is done at factory calibration stage. This association is also dependant of a temperature law for temperature compensation. For that reason the mesurement noise could make the voltage value to be lower than the zero point in case of very low h2S level. Since negative H2S level does not make physical sense the application will shape the data to keep it positive.

The sensor is supposed to be calibrated at factory every years depending of the condition of use.

The parameter GS and BP are factory parameters they should not be change by the user.

The sticker on the sensor contains the calibration parameters to be reported in the application. A sticker sample is illustrated on the picture bellow.

The first number "blue bubble" (here 1.634) must be reported in the field "Gain sensor" of the parameter section in the application. The second number "orange bubble" (here 351) must be reported in the field "biaispoint".

For the manufacturer, the Gain sensor is called "sensitivity" and the biaspoint is the "electronic zero". They can be contacted if the label is unreadable or lost.

These settings have to be set on the device on which the sensor will be appaired as below

On the top of factory calibration the user can set additional calibration using the field "Offset H2S". ( For example if the user observe a biais in a well known environment.) 

This value should not be empty, set it to 0 if not used. 

Please not that the offset parameter act only as a software offset.

In order to keep a correct calibration de sensor must be kept active. Meaning that the user should not power off the sensor for a long time.

The power cycle of the sensor must be short enough to keep the correct calibration. We suggest to use at least one measurement per hour.