Instruction manual

Page 76 SITRANS LR 300 – INSTRUCTION MANUAL 7ML19985CL02
mmmmm
Parameters
Algorithm Parameter (P820)
P820 Algorithm (F = 8)
Selects the algorithm to be applied to the echo profile in order to extract the true echo.
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
P831 TVT Shaper
Turns the TVT Shaper ON or OFF.
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.
Use this feature to bias the shape of the TVT curve to avoid crossing false echoes from
fixed objects.
Values
3
L =
Largest only
8
bLF = best of
Largest or First
12
F = First only
Value
7 Smooth TVT
Values
0 off
1 on
Related Parameters
P832 TVT Shaper Adjust
Values
Range: –50 to 50
Pre-set: 0
Related Parameters
P831 TVT Shaper
SITRANS LR 300.book Page 76 Monday, June 10, 2002 7:18 PM