User's Manual

File : CS-SUP-MUTI-WTHERMSPETEC-E02.sxw
5 WAVETHERM MODULE FUNCTIONS
The WaveTherm modules offer the following functions :
 Read temperatures immediately,
 Read temperatures logged,
 Log and automatically transmit alarm or occurrence signals :
• threshold detection
• end of battery life
• probe fault detection (only used with WaveTherm – PT100)
 Operating mode management (including clock synchronisation)
 Read internal parameters (firmware version, radio communication mode,...)
5.1 READ TEMPERATURES
As standard, the WaveTherm module offers the possibility to read temperatures (in degrees Celsius and in
an ohmic value) by setting a precision index value.
5.1.1 INFORMATION CONCERNING PRECISION
Compatibility : - WaveTherm – PT100
- WaveTherm – PT1000
Temperature measurement may be started with one of several precision levels (0 to 3). In general, precision
level 0 is sufficient. The other precision levels are used in difficult environments.
The aim of these precision levels is to compensate for measurement errors induced by the 50 Hz frequency.
In practice, this precision is increased by increasing the number of measurement sequences for the same
temperature. Each measurement sequence is offset in relation to the previous sequence by 50Hz.
The precision levels may be described as follows,
 Precision = 0x00 : normal precision (fastest measurement)
 Precision = 0x01 : high precision
 Precision = 0x02 : very high precision
 Precision = 0x03 : maximum precision (slowest measurement)
Remark: Above all, the primary function is to preserve measurement precision, even in an
environment with considerable interference, and not to improve the measurement precision of the
probe itself.
Furthermore, the higher the precision, the higher the module power consumption. It is therefore
important to find the best possible consumption/precision compromise.
WaveTherm module technical specifications page 21 of 31