XPS/XCT Series Transducers

XPS/XCT Series Transducers
Instruction Manual
PL-521
December 1996
33455210
Rev 1.1
Technology based. Customer driven.
Thank you for purchasing Milltronics’ products. We endeavour to design equipment that
is simple to use and reliable in its operation, with the aim of satisfying our customers’ needs.
Milltronics has been designing and manufacturing process equipment since 1954. Our
fields of expertise include ultrasonic level measurement, in-line weighing of dry bulk solids
and motion sensing.
Milltronics is established world wide through associate offices and representatives. Our network
is continually being refined to provide our customers with first rate sales information, engineering
assistance and after sales support.
For more details on our products and service, please contact us and we will provide you with
a listing of the offices or representatives nearest you.
Canada :
1954 Technology Dr., P.O. Box 4225,
Peterborough, Ontario, Canada K9J 7B1
Tel.: 705-745-2431
Fax: 705-741-0466
U.S.A. :
709 Stadium Drive, Arlington, Texas U.S.A. 76011
Tel.: 817-277-3543
Fax: 817-277-3894
England : Oak House, Bromyard Road, Worcester, England WR2 5XZ
Tel.: 01905-748404
Fax: 01905-748430
France :
Parc de la Sainte Victoire, Bât. 5, 13590 Meyreuil, France
Tel.: +33 4 42 65 69 00 Fax: +33 4 42 58 63 95
Belgium : August van de Wielelei 97, 2100 Deurne, Antwerp, Belgium
Tel.: 03/326 45 54
Fax: 03/326 05 25
Mexico :
Amores No. 1155, Col. Del Valle, 03100 Mexico D.F., Mexico
Tel.: 575-31-44 / 575-83-13 / 575-27-78
Fax: 575-26-86
Internet :
http://www.milltronics.com
ABOUT THE TRANSDUCER
The Echomax XPS / XCT series of transducers
operates in association with Milltronics ultrasonic
level monitoring products.
The transducer converts the electrical energy of the
transmit pulse from the transceiver into acoustical
energy. It then converts the acoustical energy of
the echo back into electrical energy for the
transceiver receive period.
The effective acoustical energy is emitted from
the transducer face and radiated outward,
decreasing in amplitude at a rate inversely
proportional to the square of the distance.
Maximum power is radiated axially (perpendicular)
from the transducer face in a line referred to as
the axis of transmission. Where power is reduced
by half (– 3 dB), a conical boundary defining the
sound beam, centered about the axis of transmission,
is established. The diametric measurement of the
cone in degrees defines the beam angle. Impedance
matching techniques are used to optimize the transfer of
power from the transducer into air and vice versa.
transducer
transducer face
– 3 db
boundary
axis of
transmission,
perpendicular to
transducer face
The XPS / XCT transducers incorporate an integral temperature sensor that reports the air
temperature at the transducer to the transceiver. The connection is transparent, in that both
the ultrasonic and temperature components of the transducer use the same leads.
PL-521
3
SPECIFICATIONS
Model :
XPS - 10
XPS - 15
XPS - 30
XPS - 40
XCT - 8
XCT - 12
Measurement Range, m
( ft ) :
0.3 - 10
( 1 - 33 )
0.3 - 15
( 1 - 50 )
0.6 - 30
( 2 - 100)
0.9 - 40
( 3 - 130 )
0.45 - 8
(1.5 - 26 )
0.45 - 12
(1.5 - 40 )
Frequency (kHz) :
43
43
30
22
43
43
Beam Angle :
12°
6°
6°
6°
12°
6°
Environmental :
- location :
indoor / outdoor
- altitude :
2000 m maximum
- ambient temp :
– 40 to 95 °C ( – 40 to 203 °F )
- pollution degree :
– 40 to 145 °C (– 40 to 293 °F)
4
Construction :
Kynar®
- exposure :
- mounting :
1" NPT or BSP
conduit connection
1-1/2 " NPT or BSP
conduit connection
1" NPT or BSP
conduit connection
- options : » factory bonded flange to suit ANSI, DIN and JIS standards
» polypropylene foam facing for dusty or steamy environments
» submergence shield, where flooding can occur
» split flange for field mounting to suit ANSI, DIN and JIS standards
- cable :
Supply Source :
Weight *, kg (lb) :
2 wire shielded / twisted, 0.5 mm2 (20 AWG)
PVC jacket
silicone jacket
transducer shall only be supplied by Milltronics certified controllers
0.8 (1.7)
1.3 (2.8)
4.3 (9.5)
8 (18)
0.8 (1.7)
1.3 (2.8)
Separation :
365 m (1200 ft) from transducer
Approvals :
CE ▼, CSA, FM, SIRA/CENELAC
see nameplate or consult Milltronics for current approvals
* approximate shipping weight of transducer with standard cable length
▼
EMC performance available upon request
Kynar® is registered trade mark of ELF Atochem
PL-521
4
OUTLINE AND DIMENSIONS
radiating face
optional bonded flange
standard
refer to associated instructions
optional split flange
refer to associated instructions
optional submergence shield
refer to associated instructions
Model
Dimension
XPS - 10
XPS - 15
XPS - 30
XPS - 40
XCT - 8
XCT - 12
A
86 mm (3.4")
119 mm (4.7")
173 mm (6.8")
206 mm (8.1")
86 mm (3.4")
119 mm (4.7")
B
122 mm (4.8")
132 mm (5.2")
198 mm (7.8")
229 mm (9.0")
122 mm (4.8")
132 mm (5.2")
C
to suit ANSI, DIN and JIS standards
D*
128 mm (5.0")
138 mm (5.4")
204 mm (8.0")
235 mm (9.2")
128 mm (5.0")
138 mm (5.4")
E
124 mm (4.9")
158 mm (6.2")
n/a
n/a
n/a
n/a
F
152 mm (6.0")
198 mm (7.8")
n/a
n/a
n/a
n/a
* nominal
PL-521
5
MOUNTING
DO’S AND DON’TS
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 of transmission is
perpendicular to the liquid surface.
On solids applications, a Milltronics Easy Aimer should be used to facilitate aiming of
the transducer.
Do not overtighten mounting. Hand tightening of the mounting hardware is sufficient.
Secure installation by connecting a safety chain from the transducer to a structural member.
Consider the optional temperature sensor when mounting the transducer.
MOUNTING - SOLIDS APPLICATIONS
Easy Aimer
(typical model)
safety chain
transducer
PL-521
6
MOUNTING - LIQUID APPLICATIONS
Bracket
Flexible Conduit
flexible
conduit
steel channel
coupling
safety
chain
transducer
Flexible conduit mounted transducer should
not be subjected to wind, vibration or jarring.
Plywood
Submersible
rigid metal conduit
coupling
safety
chain
submergence
shield
Submersible transducer, used in
applications where flooding is possible.
PL-521
7
Plywood mounting provides excellent
isolation, but must be rigid enough to
avoid flexing if subjected to loading.
MOUNTING - LIQUID APPLICATIONS (cont’d)
Blind Flange
nipple welded to blind flange
coupling
Flange, gasket and hardware supplied by customer.
Refer to Liquid \ Applications - Standpipes.
Flanged
coupling
factory flanged transducer
bolt
gasket
customer flange, flat face only
nut
Customer flanged standpipe. If a metal flange must be welded
to pipe, refer to Liquid \ Applications - Standpipes.
PL-521
8
INTERCONNECTION
Milltronics transceiver ( typical )
Direct Connection
blk
wht
drain / shield
2 Wire Extension
wht
blk
junction box
drain / shield
extend cable using 18 AWG shielded / twisted pair
Coaxial Extension
extend cable using RG - 62 A/U coax for optimum noise immunity
PL-521
9
DO’S AND DON’TS
Installation shall only be performed by qualified personnel and
in accordance with local governing regulations.
Do not route cable openly.
For optimum isolation against electrical noise, run cable separately in a grounded
metal conduit.
Seal all thread connections to prevent ingress of moisture.
Do not run cable near high voltage or current runs, contactors and SCR control drives.
PL-521
10
97/03/20
APPLICATIONS
The transducer is to be used only in the manner outlined in this instruction manual.
The transducer requires no cleaning or maintenance.
LIQUID APPLICATIONS - STILLING WELL / OCM
blind flange
air vent
TS-3 *
transducer
standpipe
bracing
standpipe inlet
primary element
stilling well
stilling well inlet
Refer to Liquid \ Applications - Standpipes.
*
PL-521
the use of a TS-3 temperature sensor provides better temperature tracking
in applications where the temperature can change quickly.
11
LIQUID APPLICATIONS - SUBMERGENCE
In applications where flooding is possible the transducer▼ can be fitted with a submergence
shield. The shield acts as a bell to create an air pocket in front of the transducer face. The
associated transceiver▼ interprets this as a flooding condition, and reacts accordingly.
Refer to transceiver manual for programming requirements.
transducer
submergence shield *
air pocket
PL-521
*
refer to associated instruction manual for assembly details.
▼
on applicable models.
12
LIQUID APPLICATIONS - STANDPIPES
In many applications access must be made via a standpipe. In such cases, Milltronics can
provide factory bonded flanged transducers or split flange kit that will readily mate to the
flanged standpipe. Another option is to hang the transducer from a blind flange.
The standpipe length should be as short and the diameter as large as possible. As a rule of
thumb, the -3 dB cone of the sound beam should not intersect the standpipe wall in
applications opening into a vessel or larger area. Otherwise, additional blanking will be
required to compensate for the interference zone created by the opening.
flanged
transducer
no vessel
no
intersection
vessel
no additional blanking required
no additional blanking required
nipple welded into
blind flange
nipple welded into
a blind flange
transducer
transducer
transducer
can read
level inside
or below
standpipe
sound beam
intersects
vessel
standpipe
end cut on a
45 ° angle
typically
near blanking extension
of 150 mm (6") past end of
standpipe may be required.
no additional blanking required
PL-521
reflection at
interference zone
created by opening
13
LIQUID APPLICATIONS - VOLUME
‘ Alternate ’
‘ Preferred ’
‘ Bad ’
tank
manufacturer’s
full level
Maintain full level
for full calibration.
Above this level
erroneous readings
will result as level
has entered
blanking zone.
(shaded area)
beam
angle
span : corresponds to
tank manufacturer’s
empty level.
rise
Empty level for
‘alternate’ location.
Below this level, echo
would reflect away
from the transducer.
may require target to
obtain empty reading
tank manufacturer’s
empty level
discharge
1. Beam should not detect bin bottom. If this occurs use range extension parameters
(on transceivers where available) to omit false echoes. A 6° beam angle represents a
rise : run of about 20 : 1 (10 : 1 for 12°). In most tanks, the transducer should be
centered as much as possible (without interference from inlet) for optimum reading range.
2. Sound beam must be perpendicular to liquid surface.
If standpipe is used, refer to Liquid / Applications - Standpipes.
3. Echo has missed improperly leveled transducer.
4. When performing an empty or full calibration, the tank must contain its normal vapour and
be at its normal temperature.
PL-521
14
LIQUID APPLICATIONS - WATER / WASTEWATER
DIFFERENTIAL LEVEL
PUMP CONTROL
PL-521
SEWAGE LIFT
15
SOLIDS APPLICATIONS - TYPICAL
Easy Aimer
1
bin wall seams
3
2
filling profile
emptying profile
1. Transducer angled to avoid
seams in bin wall and aimed at
discharge in order to read bin
when empty.
3. Transducer too close to material
inlet. Falling material will intersect
sound beam and cause erroneous
readings or loss of echo.
2. Avoid intersecting bin wall
seams, structural members and
wall irregularities. Otherwise,
transducer
minimal angle
of repose
5
4
discharge
5. On dual discharge bins, aim each
transducer at the discharge point.
4. On fluid like solids, aim
transducer perpendicular to
material surface.
PL-521
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SOLIDS APPLICATIONS - SPECIAL
STORAGE BIN WITH AGITATOR
infeed
agitator
1. Transducer should be kept away from infeed.
2. Where agitators are in use, use the Agitator Discrimination parameter on
transceivers where available.
3. Transducer should be aimed away from wall projections.
DRYER - WOOD CHIPS
infeed
drag conveyor
typical low level
typical high level
1. Transducer should be mounted perpendicular to slope of wood chips.
PL-521
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