961 Datasheet, PDF (8/16 Pages) Magnetrol International, Inc. – SIL Safety Manual for Echotel Model 961/962

5.5.1 Hygienic-Specific Installation
The hygienic version of the Model 961 is available with a
deep-drawn 304 stainless steel housing. A variety of hygienic
process connections are offered for use in food and beverage,
pharmaceutical, and biotechnology applications. These
hygienic transducers have 3-A (Authorization #596), EHEDG
certification (per TNO Report # V4772/01) and a 20 Ra
finish providing a uniform and ultra-smooth surface that
inhibits microbial growth. Electron beam welding technology
is utilized to facilitate a crevice-free surface inside the trans-
ducer tip. This allows these transducers to be used in a wide
variety of hygienic applications where CIP (clean-in-place) is
used to remove any contamination from the transducer surface.
5.5.2 Pump-Specific Installation
A DIP switch on the Model 962 allows it to be configured
to control level, or to function as a pump controller. In the
pump control mode the unit can perform auto-fill or auto-
empty of tanks, sumps, or wet wells. The tip sensitive lower
gap allows liquid levels to be pumped down to within ¹â„4"
from the bottom of the vessel. The rigidity of the flow
through upper gap allows the Model 962 to be used even
when sumps experience severe turbulence from vessel fill lines.
5.6 Configuration
Refer to Section 2.5 in the Echotel Model 961/962
Ultrasonic Single and Dual Point Level Switches Installation
and Operating Manual (Bulletin 51.646) for complete
configuration instructions.
5.6.1 Time-Delay Potentiometer
The time-delay potentiometer is used in applications where
turbulence or splashing may cause false level alarm. The
response time can be adjusted from factory-set standard of
0.5 seconds to a maximum of 45 seconds. The time-delay
potentiometer is an option for both Model 961 and Model 962
in either line-powered or loop-power configuration.
5.6.2 Level Test Push Button
The level test push button is used to manually test the
DPDT process level relay and whatever is connected to the
relay. Pressing this push button reverses the state of the
DPDT relay from engaged to de-engaged, or vise-versa.
The level test push button is an option for both Model 961
and Model 962 in line-powered configuration only.
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51-650 Echotel SIL Safety Manual