sensors: siemens milltronics xls/xlt transducers ... · page 8 xls/xlt series transducers pl-522...

33455220Rev. 2.1

XLS/XLTTRANSDUCERS

XLS/

XLTT

RAN

SDUC

ERS

Instruction Manual PL-522 January 2001

© Siemens Milltronics Process Instruments Inc. 2001

Safety Guidelines

Warning notices must be observed to ensure personal safety as well as that of others, and toprotect the product and the connected equipment. These warning notices are accompaniedby a clarification of the level of caution to be observed.

Qualified Personnel

This device/system may only be set up and operated in conjunction with this manual.Qualified personnel are only authorized to install and operate this equipment in accordancewith established safety practices and standards.

Warning: This product can only function properly and safely if it is correctly transported,stored, installed, set up, operated, and maintained.

Note: Always use product in accordance with specifications.

Copyright Siemens Milltronics ProcessInstruments Inc. 2000. All Rights Reserved

Disclaimer of Liability

This document is available in bound version and inelectronic version. We encourage users topurchase authorized bound manuals, or to viewelectronic versions as designed and authored bySiemens Milltronics Process Instruments Inc.Siemens Milltronics Process Instruments Inc. willnot be responsible for the contents of partial orwhole reproductions of either bound or electronicversions.

While we have verified the contents ofthis manual for agreement with theinstrumentation described, variationsremain possible. Thus we cannotguarantee full agreement. Thecontents of this manual are regularlyreviewed and corrections are includedin subsequent editions. We welcomeall suggestions for improvement.

Technical data subject to change.

MILLTRONICS®is a registered trademark of Siemens Milltronics Process Instruments Inc.

Contact SMPI Technical Publications at the following address:

Technical PublicationsSiemens Milltronics Process Instruments Inc.1954 Technology Drive, P.O. Box 4225Peterborough, Ontario, Canada, K9J 7B1Email: [email protected]

For the library of SMPI instruction manuals, visit our Web site: www.milltronics.com

PL-522 XLS/XLT Series Transducers

Table of Contents

Table of Contents ....................................................................................3

Specifications ..........................................................................................5

About the Transducer..............................................................................7General Guidelines .............................................................................8

Outline and Dimensions ..........................................................................9

Mounting................................................................................................11Recommendations ............................................................................11Solids Applications............................................................................11Liquid Applications ............................................................................12

Interconnection......................................................................................13Recommendations ............................................................................14

Applications...........................................................................................15Solids ...............................................................................................15Liquids..............................................................................................16

Maintenance...........................................................................................18

Installation Diagrams.............................................................................19Connection Diagram .........................................................................19Interconnection Diagram ...................................................................20

XLS/XLT Series Transducers PL-522


Sp

ecification

s

Specifications

Beam Angle• 5°

EnvironmentalLocation• indoor / outdoor

Altitude• 2000 m maximum

Pollution Degree :• 4

Ambient Pressure:• 800 kPa (8 Bar, 120 PSI)

ConstructionExposure• aluminum, 304 stainless steel and silicone

Mounting• 1" NPT conduit connection

Cable• 2 wire shielded / twisted, 0.5 mm2 (20 AWG)

Supply Source• transducer shall only be supplied by Milltronics certified controllers

Separation :• 365 m (1200 ft) from transducer

Approvals :• CE1, CSA, FM, SIRA/CENELEC• see nameplate or consult Milltronics for current approvals

1 EMC performance available upon request


Spe

cific

atio

ns

XLS - 60Measurement Range

• 1.8 – 60 m (6 - 200 ft)

Frequency• 13 kHz

EnvironmentalAmbient Temp• – 40 to 90 °C (– 40 to 195 °F )

ConstructionCable• PVC jacket

Weight 2

• 4.3 kg (9.5 lb)

XLT - 30Measurement Range

• 0.9 - 30 m (3 - 100 ft)

Frequency• 22 kHz

EnvironmentalAmbient Temp• – 40 to 150 °C ( – 40 to 300 °F )

ConstructionCable• Silicone jacket

Weight 2

• 6.6 kg (14.5 lb)

XLT - 60Measurement Range

• 1.8 - 60 m (6 - 200 ft)

Frequency• 13 kHz

EnvironmentalAmbient Temp• – 40 to 150 °C ( – 40 to 300 °F )

ConstructionCable• Silicone jacket

Weight 2

• 6.6 kg (14.5 lb)


About the T

ransducer

About the TransducerThe Echomax XLS / XLT series oftransducers operates inassociation with Milltronicsultrasonic level monitoringproducts.

The transducer converts theelectrical energy of the transmitpulse from the transceiver intoacoustical energy. It thenconverts the acoustical energyof the echo back into electricalenergy for the transceiverreceive period.

The effective acousticalenergy is emitted from thetransducer face and radiatedoutward, decreasing inamplitude at a rate inverselyproportional to the square ofthe distance. Maximumpower is radiated axially(perpendicular) from thetransducer face in a line referred to as the axis of transmission. Wherepower is reduced by half (– 3 dB), a conical boundary defining the soundbeam, centered about the axis of transmission, is established. The diametricmeasurement of the cone in degrees defines the beam angle. Impedancematching techniques are used to optimize the transfer of power from thetransducer into air and vice versa.

The XLS / XLT transducers incorporate an integral temperature sensor thatreports the air temperature at the transducer to the transceiver. Theconnection is transparent, in that both the ultrasonic and temperaturecomponents of the transducer use the same wires.

transducer

transducerface

-3dbboundary

axis oftransmission,perpendicularto transducerface


Abo

ut th

e T

rans

duce

r

General GuidelinesThe equipment may be used in all hazardous areas with all gases withtemperature classes T1, T2, T3, T4, and T5 for the XLS-30 and XLS-60, andT1, T2, and T3 for the XLT-30 and XLT-60. The XLS series is only certifiedfor use in ambient temperatures in the range of -40°C to 90°C and the XLTseries is only certified for use in an ambient range of -40°C to 150°C. Neithershould be used outside their respective temperature ranges.

• Installation shall be carried out in accordance with the applicable code ofpractice, and by suitably trained personnel.

• These devices should only be supplied from a circuit containing a suitably-rated fuse that has a breaking capacity of 4000A. This fuse is included inMilltronics’ transceivers.

• Repair of this equipment shall be carried out in accordance with theapplicable code of practice.

• The certification of the XLS and XLT range of transducers rely upon thefollowing materials used in its construction:

Enclosure: Aluminum

Encapsulant: Durapot 861-F3 / 864

• Manual override can be accomplished by using the disconnect switchprovided in the building installation of the associated controller.


Outline &

Dim

ensions

Outline and Dimensions

XLS / XLT - 30 XLS / XLT - 60h 249 mm (9.8") 324 mm (12.75")d 264 mm (10.4") 335 mm (13.2")

1” NPT

earth connectionscrew clamp(1 place)

safety connection9 mm (3/8") dia.hole (2 places)

h(nominal)

d


Out

line

& D

imen

sion

s


Mounting

Mounting

Recommendations• Mount the transducer so that it is above the maximum material level by at

least the blanking value. Refer to the associated transceiver manual.

• On liquid applications, the transducer must be mounted so that the axis oftransmission is perpendicular to the liquid surface.

• On solids applications, a Milltronics Easy Aimer should be used to facilitateaiming of the transducer.

• Secure installation by connecting a safety chain from the transducer to astructural member.

• Consider the optional temperature sensor when mounting the transducer.

Notes:• Wear proper ear protection in the vicinity of the operating transducer.

The XLS/XLT 60 transducers could emit hazardous soundpressure. They shall be installed in such a manner that thesound pressure will be reduced to a non-hazardous level.

Solids Applications

Easy Aimer(typical model)

to nearest earth

safety chain

earth connection


Mou

ntin

g

Liquid Applications

Flexible Conduit

Blind Flange

Flange, gasket and hardware supplied by customer.Refer to Standpipes on page 16.

flexible conduit

coupling

safety chain

transducer

to nearest earth

nipple welded to blind flange

couplingsafety chain

coupling

to nearest earth


Interconnection

Interconnection

Direct Connection

2 Wire Extension

Coaxial Extension

Note:Grounding transducer as shown is mandatory per safety regulations,and for isolation against electrical interference.

Milltronics transceiver(typical)blk

wht

blk/hotwht/shld

junctionboxblk

whtdrain/shield

extend cable using 18 AWGshielded / twisted pair

extend cable using RG – 62 A/Ucoax for optimum signal to noise ratio


Inte

rcon

nect

ion

Recommendations

Note:Installation shall only be performed by qualified personnel a nd inaccordance with local governing regulations.

For best results follow these installation rules:

• Do not route cable openly, instead run cable separately in a grounded metalconduit to protect it from ambient electrical noise.

• Seal all thread connections to prevent the ingress of moisture.

• Do not run cable near high voltage or current runs, contactors or SCRcontrol drives.


Ap

plicatio

ns

ApplicationsNotes:• The transducer is to be used only in the manner outlined in this

instruction manual.• This transducer requires no maintenance, and is recommended for use

with liquids only.

Solids

1. Transducer angled to avoid wall seams, andaimed at discharge in order to read empty bin.

2. Avoid intersecting bin wall seams, structuralmembers and wall irregularities. Otherwise,refer to transceiver manual

3. Transducer too close to material inlet.Falling material will intersect sound beamand cause erroneous readings or loss ofecho.

4. On fluid-like solids, aim transducerperpendicular to material surface

5. On dual discharge bins, aim eachtransducer at the discharge point.

bin wall seams

filling profile

emptying profile

Easy Aimer

minimal angleof repose

transducer

1

2

3

4

5

discharge


Ap

plic

atio

ns

LiquidsStandpipes

In many applications, access must be made via a standpipe. In such casesthe transducer is hung from a blind flange.

The standpipe length should be as short and the diameter as large aspossible. As a rule of thumb, the -3 dB cone of the sound beam should notintersect the standpipe wall in applications opening into a vessel or largerarea. Otherwise, additional blanking will be required to compensate for theinterference zone created by the opening.

nointersection

transducer

sound beamintersects

reflection atinterferencezone createdby opening

nipple weldedinto blind flange

near blanking extension of 150 mm (6") past end ofstandpipe may be required.

no additional blanking required.no additional blanking required.

no additional blanking required.


Ap

plicatio

ns

Volume

A. Primary location. This is the preferred location and should be usedwhenever possible. The centre of the tank generally gives the most reliablereadings because there are fewer obstructions to provide false echos.

B. Alternate location. This location is used if the centre of the tank is alreadyin use or if the tank roof is too weak to hold the transducer safely.

C. Poor location. This is a poor installation location. The echos are shownreflecting away from the transducer face.

beamangle

rise

‘B’

‘A’‘C’

discharge

tankmanufacturer’sempty level

Empty level for ‘B’location. Below this

level, echo wouldreflect away from

the transducer.

Maintain fullfluid level forfull or offsetcalibration.

Do not allowmaterial to

enter blankingzone.

span:corresponds totankmanufacturer’sempty level

run

1

2

3

4


Ap

plic

atio

ns

Notes1. Beam should not detect bin bottom.

If this occurs, use range extension parameters (on transceivers whereavailable) to omit false echoes. A 5° beam angle represents a rise:run ratioof approximately 20:1. In most tanks the transducer should be centred asmuch as possible (without interference from inlet) for optimum readingrange.

2. Sound beam must be perpendicular to liquid surface.

When mounting the standpipe and flange you must ensure that thetransducer face will be parallel with the liquid’s surface.

3. Echo has missed an improperly levelled transducer.

As in 2, ensure that the standpipe and flange are mounted to set thetransducer face level with the measured liquid.

4. Calibrate under normal conditions.

When performing an empty or full calibration, the tank must contain itsnormal vapour and be at its normal temperature.

MaintenanceThis transducer requires no maintenance, but if performance changes areobserved, shut down the system and promptly inspect the complete systemincluding the transducer.


Installatio

n D

iagram

s

Installation DiagramsConnection Diagram


Inst

alla

tio

n D

iag

ram

s

Interconnection Diagram

*7ml19981al01*

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