Table C-4: Negative Level
Option
Description
Equals zero
When this setting is selected and the product surface is at or below Zero
Level, the level measurement output will be zero.
Allowed
Negative level values are allowed.
C.6
Advanced setup
C.6.1
Measurement recovery time
The Measurement Recovery Time (Echo Timeout) parameter controls the maximum time
from when measurement is lost (e.g. due to process conditions such as foam or
turbulence) until it is annunciated. If measurement is recovered within the time specified
by this parameter, then it will not be annunciated.
C.6.2
Damping value
This parameter defines how fast the transmitter reacts to a change of the level value (step
response). The default value is 2 seconds.
A high value makes the level reading steady, while a low value allows the transmitter to
respond to rapid level changes (but the presented level value may be less steady).
C.6.3
General threshold
The general threshold is used to filter out noise and disturbing echoes from the product
surface echo. The transmitter uses certain criteria to decide which type of echo peak that
is detected. Only echoes above the general threshold might be considered the product
surface.
Configuration parameters
Reference Manual
September 2020
00809-0100-4480
94
Rosemount 1408H Level Transmitter