Pulse output

In this example the water flow of a canal is recorded with a SOMMER SQ-U discharge sensor. To display the total volume with an analog meter the MRL-6.1a converts the flow value to a corresponding number of pulses that are applied to the digital output.

The water volume that passes the discharge sensor in one measurement interval is specified in the measurement table with index 4 and has the unit m³ (the command PS in S-ADD returns the number of seconds of one measurement interval).

After each measurement interval the flow is returned on DIG-OUT 1 with 1 m³/impulse. For example, a flow of 12.3 m³ generates 12 impulses. The remaining volume of 0.3 m³ is added to the next interval.

If Quantity per impulse would be set to 10 */imp, only one impulse would be generated and the remaining 2.3 m³ would be added to the next interval.