Arexx BS-1400GPRS Mode D'emploi page 63

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
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Suggested solutions:
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- Insert fully charged batteries in the sensor and repeat the
communication test (please check the polarisation of the
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batteries before inserting!!)
- Check the battery contacts and remove all corrosion and
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moisture effects.
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7.3. Radio signal transfer problems
S
The receiver system is missing signals from one or more sensors, or only
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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)
Suggested solutions:
- Modify the locations of the sensor and/or the receiver
- Remove the interfering equipment
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