Declaration of conformity
The Lev'o+ sensor is LoRaWAN class A sensor, it integrates a internal battery. It also includes an internal antenna.
It integrates a Presso 4-20mA 50-70-0173, a relative pressure sensor 0-0.3bar and a connection box in which atmospheric pressure is done. The Presso and the relative pressure sensor are linked to the connection box with a 5 meters of cable, so 10 meters of cable.
The family code of Lev'o+ devices is: 50-70-196.
Installation and use
The housing is compatible with the following DIN rail adapter:
For more information about the casing, visit: www.spelsberg.com
Human Machine Interface
The Lev'o+ device implements “Analog Input” cluster on the EndPoint 0. So use 0x11 to configure the cluster.
Lev'o+ integrates the following clusters:
|Cluster||Cluster name||Managed attributes|
Threshold is available with 3 slots
Threshold is available with 6 slots
Threshold is available with 4 slots
The external sensor is calibrated on 0 bar - 0.3 bar; so 4mA corresponds to 0 bar and 20mA corresponds to 0.3 bar.
The formule to use is :
Delta_Pressure = (0.01875 * Measured_Value_mA - 0.075) * 100 000 [Pascal]
Fluid_Level = Delta_Pressure / (9.81 * Fluid_Density) [m] [Fluid_Density in kg/m3]
ex: Measured_Value_mA = 10mA => Delta_Pressure = (0.01875 * 10 - 0.075) * 100 000 = 11 250 Pascal
Our fluid is watter so the density is 997 kg/m3 => Fluid_Level = 11 250 / (9.81 * 997) = 1.15 m
A default configuration is set:
- The device reports each 24 hours the 4-20mA value (EndPoint 0 / Cluster Analog Input /Attribut PresentValue).
Every change on the default configuration must respect the legal duty cycle. (For example the most restrictive in EU is 0.1%, so in SF12 it is around 1 frame each hour)
The measurement periodicity depends on the minimum recording interval.
If the value of the minimum is 0, then the periodicity is 1 second.
If the value of the minimum is different than 0, then this value is the same as the periodicity.