51-616 Echotel Model 350/351 Ultrasonic Non-Contact Level Transmitter
3
1.2.4 Sensor Mounting Procedure
NOTE: Be sure the sensor location meets the requirements discussed
under
Section 1.2.2, General Unit Mounting Requirements
.
1. Position sensor over the tank opening. Install the
3
⁄
4
" NPT
or 2" NPT sensor in the tank fitting, flange, or mount
with an optional mounting bracket. Pipe thread com-
pound is recommended on stainless steel sensors.
Caution:
Unit should only be hand-tightened into the process con-
nection. The wrench flats should only be used when
removing the unit. Overtightening will cause transducer
errors and will void the warranty.
1.2.4.1 Remote Sensor Cabling
1. Remote mount Model 351 units require installation of
a watertight conduit from the sensor to the transmitter
enclosure.
2. Carefully pull the coaxial cable and temperature cable
attached to the sensor through the conduit to the
transmitter.
Caution:
Avoid excessive twisting of both the sensor and tempera-
ture cables.
NOTE: In high humidity applications, it is recommended that the sen-
sor wiring be completely immersed in an insulating compound
where the conduit connects to the sensor. (3M #4441 Gella
Re-enterable Encapsulating Compound or equivalent).
1.3
Electrostatic Discharge (ESD)
Handling Procedure
Magnetrol’s electronic instruments are manufactured to
the highest quality standards. These instruments utilize
electronic components which may be damaged by static
electricity present in most work environments. The follow-
ing steps are recommended to reduce the risk of compo-
nent failure due to electrostatic discharge:
1. Ship and store circuit boards in anti-static bags. If an anti-
static bag is not available, wrap board in aluminum foil.
Do not place boards on foam packing materials.
2. Use a grounding wrist strap when installing and removing
circuit boards. A grounded workstation is also recommended.
3. Handle printed circuit boards only by the edges. Do not
touch components or connector pins.
4. Ensure that all electrical connections are completely made
and none are partial or floating. Ground all equipment to a
good, earth ground.
