The Y value will be compared with Lo and Hi threshold. Please refer below the graph of alarm processing.
Figure – Ultrasonic Level Transmitter Calibration
DB: Dead band 0..280 mm (This is a short range in front of the ultrasonic sensor can not measure distances)
H: Maximum measuring distance ( Span )
D: Distance
For example: Water tank with maximum height to be measured 3000mm (H) and Dead band (DB) is 280 mm, then:
5.6.2 Calibration
