300-R010-45G datasheet(3/36 Pages) MAGNETROL

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MEASUREMENT RANGE CALCULATIONS

MEASUREMENT RANGE PARAMETERS

Ultrasonic non-contact devices are typically rated for a

maximum range in ideal conditions. Experience has shown

that maximum range must be reduced for certain factors.

Although the maximum range rating is somewhat conser-

vative, each application must be evaluated for specific

conditions.

The operating parameters listed below can impact the max-

imum range of measurement:

• Surface agitation

• Vapors and steam (as measured by temperature

difference between liquid and air)

• Beam spread interference

• Transducer alignment

• Foam

• Dust

• Air movement

• Ambient temperature

• Pressure

Sensor alignment

Beam spread

interference

Beam spread

interference

Air movement

Dust

Vapors

Foam

Surface

agitation

HOW TO CALCULATE

To estimate how successful a particular application may be,

using the chart on page 4:

1. Select one condition from each of the operating

parameters that best describes your application.

2. Enter the corresponding performance multiplier value

in the application column.

3. Multiply all of the selected values together.

4. Multiply step 3 by 30' (maximum potential range);

this yields a value that is the maximum allowable

measurement range for this application.

Example:

The vessel is a closed-top tank, noninsulated, 22-feet tall.

Surface agitation:

Expect slight agitation from fill

line. Performance multiplier 0.9.

Vapor and steam:

The process temperature is

+130° F, slight vapor is expected.

Performance multiplier 0.9.

Beam interference:

No interference exists.

Performance multiplier 1.0.

Transducer alignment:

The transducer will be perpendi-

cular to the liquid surface.

Performance multiplier 1.0.

Foam:

None.

Performance multiplier 1.0.

Dust:

None. Performance multiplier 1.0.

Air movement:

None. Performance multiplier 1.0.

Ambient temperature:

0 to +120° F.

Performance multiplier 1.0.

Pressure:

Atmospheric pressure.

Performance multiplier 1.0.

Will the Model 300/301 work for this application?

Calculation:

Multiply all values in the application column:

0.9 x 0.9 x 1.0 x 1.0 x 1.0 x 1.0 x 1.0 x 1.0 x 1.0 x

30 feet (maximum) = 24.3 feet

The calculation yields 24.3 feet as the new maximum range.

Since the tank is 22 feet tall, this application will give satis-

factory results.

NOTE: The performance multipliers provided are conser-

vative estimates. Since these factors are subjective, the

values have been designed to provide very high confidence

of system success. Contact the factory if there are any

questions concerning the interpretation of any of these per-

formance multipliers.

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