Temperature Compensation (P660 To P664) - Siemens SITRANS Probe LU Operating Instructions Manual

P654 Sound Velocity at 20
This value is used to automatically calculate Sound Velocity (P653).
Values
Related
After performing a sound Velocity Calibration, check this value to verify the acoustic
beam atmosphere in air (344. 1 m/s or 1129 ft/s).

Temperature Compensation (P660 to P664)

P660 Temperature source
Determines the source of the temperature reading used for calculating speed of sound.
Values
Maximum Temperature (P300) always uses the transducer as source: it is not
Note:
affected by P660.
P661 Temperature fixed
Defines the fixed temperature (in
2 (fixed temperature).
Values
Use this function when you want to manually override the temperature sensor with a
fixed temperature value.
• Set P660 to 2.
• Enter the fixed temperature value you want to use in place of the sensor
temperature.
A5E32337695 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS
o
C
Range
50.01 to 2001 m/s (164.1 to 6563 ft/s)
• P005 Units
• P651 Sound Velocity Calibration
• P653 Velocity
1 * Transducer (P664)
2 Fixed temperature (P661)
o
C) used for calculating speed of sound if P660 is set to
Range
–40 to 85
Default
20 (
o
C
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C)
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