Accutron SP Ultra Panduan Pengoperasian - Halaman 8

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Section 4: Device Summary

Once powered up, the Accutron SP Ultra will begin reading airflow and communicating via Modbus. To

test system activity, the Heartbeat register can be polled. This is a constantly increasing value that

should change approximatly every second.

The system monitors airflow velocity and direction. The Direct airflow register outputs the absolute air

velocity independantly from direction (shown with orange arrow in below image). The linear airflow

velocity registers output the normalized air velocity recorded in the direction of the SP Ultra (green

arrow). The direction of the instrument is indicated by the blue arrow at the top of the unit. When

installing the SP Ultra, make sure the arrow is pointed into the intended direction of the airflow stream

for best results.

Airflow angle outputs the direction of the airflow with respect to the SP Ultra, and is reported in

degrees. It is measured clockwise from the forward facing direction of the unit (shown with black arrow

in below image). If the unit is exposed to a head wind, with the airflow coming directly at the front of

the unit, it will report a direction of 0 degrees. With the airflow coming from the back of the unit, a

direction of 180 degrees will be reported.

Device user settings are configured over Modbus. Refer to the 'User Settings – holding registers' in the

Modbus Registers map for user configurable parameters.