Siemens SITRANS LUT400 - Signal Processing (2.12.); Temperature and Velocity (2.12.1.)

SITRANS LUT400
218 Operating Instructions, 07/2019, A5E33329501-AC
9.2.12 Signal Processing (2.12.)
Note
Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly
stated.
9.2.12.1 Temperature and Velocity (2.12.1.)
Sound Velocity (2.12.1.1.)
The value adjusted based on the Sound Velocity at 20 degrees C (2.12.1.5.) (Page 219) vs.
Process Temperature (2.12.1.2.) (Page 218) characteristics of air.
Values
Range: 125.000 to 20000.000 m/s
Default: 344.130 m/s
Alternatively, enter the current sound velocity (if known), or perform an Auto Sound Velocity
(2.12.1.6.) (Page 219). Value is always reported in m/s.
Process Temperature (2.12.1.2.)
View the transducer temperature in °C.
If Temperature Source (2.12.1.3.) (Page 218) is set to any value other than Fixed
Temperature (2.12.1.4.) (Page 219
), the value displayed is the temperature measured. If
Temperature Source is set to
Temp Fixed, the Fixed Temperature (2.12.1.4.) (Page 219)
value is displayed.
Temperature Source (2.12.1.3.)
Source of the temperature reading used to adjust the speed of sound.
Options
*
TRANSDUCER
FIXED TEMPERATURE
EXTERNAL TS-3
AVERAGE OF SENSORS (Transducer and TS-3)
With this default, the SITRANS LUT400 uses the transducer’s internal temperature sensor
(standard in all Siemens EchoMax Transducers).
If the transducer does not have an internal temperature sensor, Fixed Temperature value, or
an External TS-3 temperature sensor can be used.
If the acoustic beam atmosphere temperature varies with distance from the transducer,
connect a TS-3 Temperature Sensor and Ultrasonic/ Temperature Transducer, and select
Average of Sensors (Transducer and TS-3).