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Dokument informacyjny #3422

Adjusting the temperature measured on the smart home device

The temperature measured on the smart home device, for example FRITZ!Smart Energy 200 or FRITZ!Smart Thermo 302, may differ from the actual room temperature. If the smart home device is next to a heater or behind a curtain, for example, the temperature on the device itself is probably higher than the temperature you measure with a thermometer in the middle of the room. You can correct this deviation by positioning the smart home device somewhere more suitable and adjusting the temperature deviation, the so-called offset.
As an alternative, you can use the smart switch FRITZ! 440 as an external temperature sensor and position it at a suitable place in the room to measure the temperature, for example next to the sofa.

1 Finding the ideal location for the FRITZ! smart plug

  1. Plug the smart plug into a wall outlet.
  2. Make sure that the ventilation slots are not covered, the device is not exposed to direct sunlight, and that it is not located directly next to a heater.
  3. Remove any possible sources of heat near the smart plug (for example other electrical devices that radiate heat).

2 Finding the ideal location for the FRITZ!DECT Repeater

  1. Plug FRITZ!DECT Repeater into a wall outlet.
  2. Make sure that the ventilation slots are not covered, the device is not exposed to direct sunlight, and that it is not located directly next to a heater.
  3. Remove any possible sources of heat near the device (for example other electrical devices that radiate heat).

3 Setting the temperature offset

The temperature of a room is very different in different areas, especially during the heating phase. The time it takes for heat to distribute evenly depends on the ceiling height or the presence of niches and bay windows, for example, and can vary greatly. Therefore, do not set the offset until the room was constantly heated to the desired room temperatures for about 2 days so that the heat could be almost evenly distributed throughout the room:

Important:The temperature at the device itself can vary greatly because of fluctuations due to time of day, for example occasional exposure to sunlight or reduced ventilation, heating up of the device, etc. The deviation between the temperature at the device itself and the actual room temperature is therefore not constant. The offset cannot be used to take variable temperature fluctuations into account.

  1. Click on 'Smart Home' in the FRITZ!Box user interface.
  2. Click on 'Devices and Groups' in the 'Smart Home' menu.
  3. Click on the (Edit) button for the respective device.
  4. Under 'Temperature Offset', click on the plus or minus to set the actual room temperature.
  5. Click on 'Apply' to save the settings.

4 Using a different temperature sensor

We recommend using FRITZ!DECT 440 or FRITZ!Smart Control 440 as an external temperature sensor because you can position them at the most suitable place in the room to measure the temperature:

Note:Smart plugs, for example FRITZ!Smart Energy 200 or a FRITZ!DECT Repeater, can also measure the temperature. Note, however, that sockets you have to plug these devices into are usually in unfavourable places for measuring the room temperature, for example in corners of rooms or near the floor. These areas of the room are usually unsuitable places to use external temperature sensors.

Using a temperature sensor

  1. Position smart switch FRITZ! 440 at a suitable place in the room for measuring temperature, for example next to the sofa.
  2. Do not operate any devices near the smart switch FRITZ! 440 that produce warmth.

Selecting the temperature sensor

  1. Click on 'Smart Home' in the FRITZ!Box user interface.
  2. Click on 'Devices and Groups' in the 'Smart Home' menu.
  3. Click on the (Edit) button for the respective radiator control.
  4. Under 'Temperature Offset' enable the option 'Adjust to automatic offset by means of an external temperature sensor'.
  5. Select the desired temperature from the drop-down list.
  6. Click on 'Apply' to save the settings.
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