I have some questions concerning VAV systems. Differential pressure must be measured at the entrance of each VAV box. The VAV box tupe is in series fan powered (about 2000 - 2500m3/h).
1.I need to specify the scope for the transmitter - how many Pascal should it be able to read by the VAV box???
2.The main fan of the AHU has frequency modulation and the pressure is measured near the AHU. I also need to know the scope of the transmitter there having in mind that the external static pressure of the AHU fan at full airflow is 600Pa.
Any help will be greately appreciated.