940-111E-004 Datasheet, PDF (4/8 Pages) Magnetrol International, Inc. – Echotel® Model 940/941

2.0 Installation
2.1 Unpacking
Unpack the instrument carefully. Inspect all units for
damage. Report any concealed damage to carrier within
24 hours. Check the contents of the packing slip and
purchase order. Check and record the serial number for
future reference when ordering parts.
serial number
2.2 Electrostatic Discharge (ESD) Handling
Procedure
Magnetrol’s electronic instruments are manufactured to the
highest quality standards. These instruments use electronic
components that may be damaged by static electricity pres-
ent in most work environments.
Make sure that all electrical connections are completely
made and none are partial or floating. Ground all equip-
ment to a good, earth ground.
2.3 Mounting
High alarm Low alarm
Filling line
High alarm
Low alarm
Figure 2
Typical Mounting Orientations
Pump
Pump
protection
Model 940 & 941 level switches may be mounted in a
variety of positions as shown in Figures 2 through 5.
Proper orientation of the transducer gap will facilitate
maximum performance in difficult applications. When the
switch is mounted horizontally, the transducer gap must be
turned vertical to allow proper drainage of liquid out of
the gap. The wrench flats on the mounting nut are aligned
with the transducer gap; therefore, proper transducer
mounting can be achieved by aligning the mounting nut
flats in a vertical orientation. See Figure 4.
When installed in a nozzle or pipe, the transducer gap
must extend into the tank at least one inch beyond the
inside tank wall. Refer to Figure 5.
Screw transducer into the opening using a wrench on the
transducer mounting nut flats. If flanged, bolt unit to mat-
ing flange with proper gasket. Use thread tape or suitable
pipe compound on the threads. Do not over-tighten.
4
51-647 Echotel Model 940 & 941 Ultrasonic Level Switches