Instructions

7.2. Problems in the temperature sensor module

The receiver receives signals from sensors, but fails to registrate

signals from one sensor in particular.

Potential problems:

- Batteries are missing or are at a low charging level

- Reversed polarity of the sensor’s batteries

- The sensor’s location is outside of the receiver’s reception range

- Damage to the sensor (by corroded battery contacts, moisture

or battery leakage)

- Problems in the radio signal communication

Suggested solutions:

- Insert fully charged batteries in the sensor and repeat the

communication test (please check the polarisation of the

batteries before inserting!!)

- Check the battery contacts and remove all corrosion and

moisture eects.

7.3. Radio signal transfer problems

The receiver system is missing signals from one or more sensors, or only

receiving a limited number of signals.

Potential problems:

- Walls or ceilings between sensor and receiver may contain

metallic constructions.

- Sensors and/or receiver may be located on a metallic surface

- Sensor or receiver are situated in locations with high humidity

- Windows between sensor and receiver may contain several layers of

glass or shielding materials or may be covered by humid moisture.

- Other 433MHz systems may be working within the 20m operating range

- Interference or jamming signals from radio or TV transmitters

- Electronic or electrical equipment (eg. computer equipment or

magnetrons), operating within the 2-5m operating range

- Low power level of the sensor’s batteries (see 2)