Algorithm Parameter (P820); Tvt (Time Varying Threshold) Adjustment Parameters (P830 To P841) - Siemens SITRANS LR 300 Instruction Manual

Algorithm Parameter (P820)

P820 Algorithm
Selects the algorithm to be applied to the echo profile in order to extract the true echo.
Values
Select 8 (bLF) for most applications and all mounting locations except the center of the
vessel. Select 12 (F) for the center of the vessel mounting location and for still pipes and
waveguide antennas used as stillpipes. Select 3 (L) only when the vessel level will remain
at low levels.
TVT (Time Varying Threshold) Adjustment Parameters
(P830 to P841)
The following parameters are for authorized Siemens Milltronics Service personnel or
technicians familiar with Siemens Milltronics echo processing techniques. Dolphin Plus
should be used to view the echo profile before attempting to modify these parameters.
P830 TVT Type
Value
P831 TVT Shaper
Turns the TVT Shaper ON or OFF.
Values
Related Parameters
Turn the TVT Shaper ON before using P832, and afterwards turn the TVT Shaper ON and
OFF while monitoring the effect to pick up the true echo.
P832 TVT Shaper Adjust
Allows manual adjustment of the TVT curve.
Values
Related Parameters
Use this feature to bias the shape of the TVT curve to avoid crossing false echoes from
fixed objects.
Page 76
(F = 8)
L
3 L = argest only
8 bLF = best of
F F
12
= irst only
7 Smooth TVT
0 off
1 on
P832 TVT Shaper Adjust
50 to 50
Range: –
Pre-set: 0
P831 TVT Shaper
SITRANS LR 300 – INSTRUCTION MANUAL
L F
argest or irst
7ML19985CL02