300-R010-45G datasheet(6/36 Pages) MAGNETROL

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ELECTROSTATIC DISCHARGE (ESD) HANDLING PROCEDURE

Magnetrol electronic instruments are manufactured to the

highest quality standards. These instruments utilize electron-

ic components which may be damaged by static electricity

present in most work environments. The following steps are

recommended to reduce the risk of component 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 remov-

ing circuit boards. A grounded workstation is also rec-

ommended.

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.

TRANSDUCER MOUNTING cont.

Distance from

12° Beam

Minimum Distance

Transducer

Diameter (feet)

from Wall or

Face (feet)

Obstruction (inches)

0.6'

1.3'

1.9'

11"

12'

2.5'

15"

15'

3.2'

19"

18'

3.8'

23"

21'

4.4'

26"

24'

5.0'

30"

27'

5.7'

34"

30'

6.3'

38"

Table 1

Ultrasonic Beam Angle

CAUTION: HAND TIGHTEN ONLY. Do NOT use a pipe

wrench or other tools when tightening the transducer. Do

NOT tighten by holding onto the transducer housing.

Avoid excessive twisting of the transducer cable.

CAUTION: Do NOT install transducers in the center of

domed roof tanks. Locate transducers 1' to 3' off-center

to minimize false/multiple echoes being reflected off the

domed roof.

ULTRASONIC BEAM ANGLE

The transducer must be mounted such that the beam does

not touch the sidewall or obstructions (ladders, fill lines, sub-

merged pumps, etc.) between the transducer face and the

liquid surface. The ultrasonic pulse is emitted with a beam

spread of 12° (6° radius) from the face of the transducer.

Objects that extend into the ultrasonic beam can produce

false echoes that may give erroneous level readings.

Table 1 can be used to determine how far away from the wall,

ladder, submerged pump, or other obstruction, the transduc-

er must be mounted to avoid producing false echoes.

Generally speaking, the transducer should be mounted one

foot away for every 10 feet of height.

TRANSMITTER MOUNTING

If the unit is supplied as an integral Model 300, please skip

to the next section which covers proper ESD handling pro-

cedures. This section covers proper transmitter mounting

if the unit is a Model 301 remote transmitter.

TRANSMITTER MOUNTING LOCATION

The following guidelines should be taken into considera-

tion when selecting the mounting location for the remote

mounted Model 301 transmitter:

1. Keep the transmitter away from potential sources of

electromagnetic noise that may interfere with the per-

formance of the unit.

TRANSMITTER MOUNTING LOCATION cont.

2. Avoid locations that are exposed to intense direct sun-

light. In locations where intense sunlight is a concern,

use a sunshade over the unit.

3. Also avoid locations that are subjected to flooding or

excessive vibration or shock.

NOTE: A switch or circuit breaker shall be installed in

close proximity to equipment and within easy reach of

operator. It shall be marked as the disconnecting device

for the equipment.

CAUTION: The instrument is rated per IEC 1010 for use

in installation Category II, Pollution Degree 2.

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