LIQUID APPLICATIONS - VOLUME
1. Beam should not detect bin bottom. If this occurs use range extension parameters
(on transceivers where available) to omit false echoes. A 5° beam angle represents a
rise : run of about 20 : 1. In most tanks, the transducer should be centered as much as
possible (without interference from inlet) for optimum reading range.
2. Sound beam must be perpendicular to liquid surface.
If standpipe is used, refer to Liquid Applications - Standpipes.
3. Echo has missed improperly leveled transducer.
4. When performing an empty or full calibration, the tank must contain its normal vapour and
be at its normal temperature.
tank manufacturer’s
empty level
rise
Empty level for
"alternate" location.
Below this level, echo
would reflect away
from the transducer.
span: corresponds to
tank manufacturer’s
empty level
tank manufacturer’s
full level
"Alternate"
"Preferred"
"Bad"
discharge
5° beam angle
run
PL-418
6
