Features

AS6031F1 comes with ScioSense firmware that does the full flow and temperature calculation. There

is no need for the user to write code by himself. Only firmware data need to be adopted with respect

to operation limits and linearization coefficients according to the specific sensor. An external

controller can read the measurement results like flow and temperature from specified memory cells

over SPI on demand. The measurement is running permanently without any need of external control.

As an option, users of course can add their own code like additional filtering, averaging or adoption

to production process.

Typical properties of the firmware are:

• Flow measurement

• Full linearization and calibration, either using a standard piece-wise linear correction or

ScioSense proprietary method.

• Temperature measurement for cold water meters derived from speed of sound

(up to 60 °C).

• Temperature measurement using resistive sensors 0.5 to 5 kΩ with built-in PT1000

characteristic, procedures for 2- and 4-wire measurement and a calculation accuracy in

4-wire mode of 10 mK.

• Optional internal chip temperature measurement.

• Zero flow detection e.g., down to 0.5 l/h for Q3 = 4000 l/h.

• Full communication (input and output) over SPI. Flow volume and error can be provided also

over standard two-wire pulse interface.

• Prepared for two-point calibration (zero flow and high flow @ room temperature) in series

production.

• First-hit level (FHL) regulation, various modes.

• Phase shift detection and phase jump correction for ToF

• Bubble detection and error detection included to recognize wrong measurements.

• Entry points for custom code.