Milltronics Level Genie, Instruction Manual

Page: 13 / 30

disable the alarm time delays while calibrating.
The "10 ft. - 5 ft.'" toggle should be in the appropriate
position reflecting the desired operating range.
3.
Transducer
The ST25 series transducers have an outer housing of
chlorinated polyvinyl chloride (CPVC) and a radiating face of
polyurethane.
These materials have excellent resistance to a
wide range of corrosives but may be damaged by ketones, aromatics
and some chlorinated hydrocarbons.
Alternate materials are
available for these environments.
The operating range of the transducer is between -4O°C to
+93°C (-400°F to +200°F). These temperatures must not be exceeded
at the face of the transducer or permanent damage may result.
The ST-25 transducer is generally mounted at the top of the
vessel with its'radiating surface aimed directly down at the
surface of the material being measured. The transducer is pro-
vided with a 1" NPT nipple for direct attachment.
See Fig. 2
for transducer dimensions and typical mounting.
a.
b.
C .
Mount the transducer at least eighteen (18) inches above
the highest level the material will reach in the vessel
directly beneath the transducer.
This minimum distance
between material and transducer must be provided for proper
operation of the system at high material level.
Locate the transducer as far as possible from the point
the material enters the vessel to minimize interference
from sonic noise generated by the incoming material and
to prevent the material from falling or splattering into
the sound path between the transducer
being measured.
and the material
Do not locate the transducer directly above any object
4-2