User's Manual

File : CS-SUP-MUTI-WTHERMSPETEC-E02.sxw
5.7 SENSOR FAULT DETECTION (IF ACCEPTED BY THE MODULE)
For all modules, temperature probe absence or error detection is carried out during a write request and is
indicated by the presence of a specific value which does not correspond to a possible temperature value.
However, in the case of the WaveTherm – PT100 module only, after detection of a probe fault, the module
carries out the following operations:
 records the detection date in an internal parameter.
 If required, transmits an immediate probe fault detection radio frame.
5.8 END OF BATTERY LIFE DETECTION
To detect the end of battery life, the WaveTherm module uses the power metering principle rather than
measurement of the battery voltage. Lithium batteries are, in particular during passivation, unsuitable for the
voltage measurement method to determine the remaining capacity.
The WaveTherm records and evaluates all events (measurements, transmissions) to decrement the power
meter according to the battery used. When the meter passes below a predefined threshold, the “end of
battery life” is signalled with the STATUS byte.
The initial value of the end-of-life meter is factory-set. It depends on the type and number of batteries used.
When the end of battery life is detected, the detection date is memorised and may be read with a radio
command.
WaveTherm module technical specifications page 30 of 31