Sensor Configuration

Here we show how to configure the sensors that are connected to the remote measuring and monitoring unit.

To configure each sensor first go to the "Main menu“ => “System Tree“ or “Group Tree“ and simply select the sensor element. Here, a window with the sensor properties will pop up.

Now you can change the sensor settings and then click "Save" or "Apply" at the bottom of the "Properties" window as shown in the screenshot below.


To save your sensor settings in the non volatile flash memory of your remote measuring and monitoring unit permanently, please click on the disk icon in the upper right of the webGUI.

Individual sensor configuration
Fig: In the web GUI of the remote monitoring unit you can configure each sensor individually. Screenshot shows settings of firmware 2.7.3.

All sensors include:

Name The sensor name is assigned automatically and can be changed
Group Individual sensors can be summarized under "Group Tree"
ID identification name of the corresponding sensor
Type Here the sensor type is displayed as temperature
Class Display the Sensor class analog, CAN, Switch, Discrete
Hardware Port Shows the port where sensor is connected

Configurable sensor thresholds and warning values:

All intelligent IP sensors from manufacturer Didactum offer in webGUI individually configurable thresholds and warning values:

Select individual sensor thresholds.
Fig: Here the "Current value" is 25.0 °C and is represented by the triangle in the middle. Currently the triangle is green because it is situated in an „Normal State" range below "High warning level“ of 27.0 °C. In "Logic schemes" menu you can setup individual notifications, alerts and actions.

Sensor Hysteresis Functions

You can define for Didactum`s intelligent sensors a hysteresis state. With Hysteresis function you can adjust the time or the value the sensor is in a warning, or normal state before the remote monitoring device sends notifications and alerts. This Hysteresis feature was added to firmware 2.7.3 and higher, to eliminate possible false warnings when the thresholds are changing between two sensor states.

Hysteresis can be selected as time or as a value. It can be also be disabled, if you do not need the Hysteresis function. If the hysteresis is set in a time, the sensor will transit to a new state with a delay of the specified number of seconds. 

Hysteresis time function
Fig.: The time counting will start from the moment when the measured sensor value has left the current range.
Hysteresis value function
Fig.: If you set the hysteresis function by value, the transition to a new state will start when the sensor reading is beyond the defined Hysteresis value.

Fine-tuning of Didactum`s intelligent sensors

The IP based, intelligent sensors of the manufacturer Didactum are factory calibrated. In some rare cases, the sensor readings may be too high or too low.

The sensor readings can be adjusted with the help of a simple linear formula. Let's take a look at the following example of the SNMP enabled temperature sensor:

Calibration of temperature sensor