File : CS-SUP-MUTI-WTHERMAPP-E01.sxw
3.8 SENSOR FAULT DETECTION (if supported 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 and WaveTherm – PT1000 modules only
, after
detection of a probe fault, the module carries out the following operations:
records the detection date in internal parameters (0x91 ; 0x92).
If required, transmits an immediate probe fault detection radio frame.
3.9 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
Application 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.
Please refer to the WaveTherm module technical specifications, for more details on the life of the modules.
WaveTherm modules – application handbook
page 11 of 65
