Siemens sitrans PROBE LU - LTB Parameter Definitions

A5E32337695 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS Page 61
Parameters
P832 TVT Shaper Adjust
Allows manual adjustment of the TVT curve.
P837 Auto False-Echo Suppression
Use P837 and P838 together, to set SITRANS Probe LU to ignore false echoes
1
. Use P838
to set the Auto TVT distance first.
If SITRANS Probe LU displays a full level, or if the reading fluctuates between a false high
level and a correct level, set P837 to elevate the TVT in this region and to de-sensitize the
receiver from any ‘base noise’ caused by internal transducer reflections, nozzle echoes,
or other vessel false echoes. Set P838 and then P837 (detailed instructions follow P838).
Note: This parameter is for use by Siemens Service personnel.
1.
For more detail, see TVT (Time Varying Threshold) curves on page 89.
Notes:
• This function works best when the vessel is empty or nearly empty: use it only if
there is a minimum distance of 2 meters from the transducer face to the material.
• Set P837 and P838 during start up, if possible.
• If the vessel contains an agitator, the agitator should be running.
Values
0*Off
1
Use ’learned’ TVT. (See ’learned TVT curve’ in Display
after Auto False Echo Suppression
on page 62.)
2
Learn
Display before Auto False Echo Suppression
(or when P837 = 0)
default TVT
P839
Hover Level
false
echo
true
echo
Distance (meters)
Level (db)