Percent Ammonia

The amount of Ammonia can also be inferred from the Hydrogen value.

 

Minimum H₂ for NH₃ Display Parameter

This analyzer measures %H2 (in ppm) and calculates a gas composition of DA or NH3 (with %DA + %NH3 = 100%). An available analog output provides a 4-20mA signal representing either DA or NH3--defaulting to 4mA when zero hydrogen is measured.

 

Due to the high accuracy of the sensor, trace amounts of Hydrogen may be measured in "near zero" environments, resulting in oscillations between 4- and 20mA when configured for %NH3. To prevent such oscillations the user may define a Minimum H2 to fix the output at 4mA until the measured Hydrogen percentage exceeds such a threshold.