Pulsar dB Series User manual

EU DECLARATION OF CONFORMITY
Pulsar Process Measurement Ltd. declares under our sole responsibility
that the products listed below conform with the relevant provisions of
EU directives 2014/34/EU (ATEX), 2014/30/EU (EMC) & 2011/65/EU
(RoHS). Product(s): dB3, dBmach3, dB6, dB10, dB15, dB25 & dB40.
Notified Body: Sira Certification Service (0518) (CSA)
Unit 6, Hawarden Industrial Park,
Hawarden,
Deeside,
CH5 3US
Conformity has been demonstrated with reference to the following
documentation: Quality Assurance Notification Sira 02ATEXM230.
EU type examination certificate Sira 02ATEX2103X (Exia),
02ATEX5104X (Exmb), and IECEx SIR 18.0037X (Exmb).
Compliance with the Essential Health & Safety Requirements has been
assessed by reference to the following relevant standards:
ATEX: EN 60079-0, -11, -18.
EMC: EN 61326-1:2013, class industrial.
Tim Brown –Electronics Engineer Date 5th July 2019
Dispose of Transducer and cable in accordance with regional
environment regulations for electronic equipment e.g. WEEE
regulations apply within the EU to Directive 2012/19/EU
Model
Range in
metres
Blanking
Distance
Operating
Frequency
Housing diameter
Housing
Height
dBmach3
2.5m
0m
125kHz
180 (sunshield)
205
dB3
3m
0.125m
125kHz
78
115
dB6
6m
0.3m
75kHz
86
104
dB10
10m
0.3m
50kHz
86
104
dB15
15m
0.5m
40kHz
86
122
dB25
25m
0.6m
30kHz
105
142
dB40
40m
1.2m
20kHz
205
223
Process Connection: 1” BSP or NPT
Operating Temperature: -40 to +90°C (dB3/dBmach3 -30 to +90°C)
In hazardous area -40 to +75° C (dB3/dBmach3 -30 to +75°C)
Ingress Protection: IP68.
P U L S A R Process Measurement Limited
Cardinal Building
Enigma Commercial Centre
Sandy’s Road Tel: [phone]
Malvern Fax: [phone]
WR14 1JJ email: [email protected]
United Kingdom http://www.pulsar-pm.com
© Pulsar Process Measurement Ltd 2019
SPECIFICATIONS
M-DB-0-005-0P
The installation is now complete; refer to the PULSAR ultra
user manual for instructions on how set up the PULSAR
ultra instrument.
dB Flange Dimensions (mm)
EN1092 (BS 4504)
Size
A
B
C
No. holes
50
165
19
125
4 -18mm
80
200
19
160
8 -18mm
100
220
19
180
8 -18mm
150
286
19
240
8 -23mm
200
337
19
295
12 -23mm
ANSI Class 150
Size
A
B
C
No. holes
2
165
19
121
4 -18mm
3
200
19
152
4 -18mm
4
220
19
190
8 -18mm
6
286
19
241
8 -22mm
8
343
19
298
8 -22mm
Wire the transducer into the relevant PULSAR ultra
instrument as shown in figure 6. Terminal numbers will
depend on the unit.
NOTE: All extension cables must use 2 or 3 core screened
cables not exceeding a total of 100nF between conductor
to screen and 40 ohms/conductor.
dB series TRANSDUCERS
INSTRUCTION MANUAL

APPLICATIONS
The dB transducer range has been specified and designed to meet
the demanding requirements of today’s process level measurement
applications for liquids and solids.
The dB transducers incorporate the latest in ultrasonic design
technology to provide a transducer suitable for the majority of short
range liquid and solids level applications.
Several unique and innovative features are included in the dB
transducers, including the unique low energy interface between the
transducer and the PULSAR ultra range of level and flow
measurement instrumentation. This low power interface has
enabled the transducers to achieve Intrinsic Safety (Exia) approval.
The transducer interface is also frequency independent allowing
transducers to be interchanged without “re-tuning” the drive
electronics. There are several patents applied for covering these
designs.
The dB unit is based on a PZT ceramic transducer element. The
nominal beam angle is 10 0 @ -3 dB (depending on unit). When
coupled with the DATEM®signal processing used in the PULSAR
ultra range of level and flow measurement instrumentation, they
provide unmatched performance in industrial process level
measurement.
All dB transducers include integral temperature compensation.
Standard cable lengths 5, 10, 20 or 30m. And an optional
submersion shield is available to prevent spurious signal if the
transducer becomes submerged.
A range of flange mounting options (ANSI & EN1092) with an
optional PTFE facing for improved chemical resistance is available.
An aiming kit is recommended for solids level measurement to help
coincide with the material surface and the angle of repose.
Hazardous Area Installation
All dB transducers are ATEX certified for use in hazardous areas.
There are two different versions:
One certified to Exia IIC T6 (Sira 02ATEX2103X) for use in zone 0,
1, 2, 20, 21 & 22 applications (safety barrier required), and another
certified to Exmb IIC T6, Exmb IIIC T85°C Db (Sira 02ATEX5104X
and IECEx SIR 18.0037X ) suitable for use in zones 1, 2, 21 & 22
(no barriers required).
The ‘X’ in the certification No.’s indicates the following special
conditions apply:
Exia version –Due to the plastic housing it is possible an
electrostatic discharge may be generated, therefore when used for
applications that specifically require group II category 1, do not
install in conditions that are conducive to the build up of
electrostatic charge. Additionally, clean only with a damp cloth.
Exmb version –This version must be supplied from apparatus that
provides protection from prospective short circuit currents up to
4000A. The Ultra and Blackbox units are provided with these fuses.
The dB transducers must be routinely inspected to avoid the build-
up of a dust layer when installed in Zones 20, 21 & 22.
INSTALLATION
The dB transducer should be installed directly above the liquid or
solid level with the transducer axis perpendicular to the surface to
be measured.
The transducer can be installed using the 1” BSP thread on the top
of the transducer or with the supplied 1” BSP to M20 thread
adapter. See figure 1 for examples.
In some applications, it may
not be possible to install the
transducer using either a
flange or the 1” BSP thread, in
these circumstances it may be
possible to suspend the
transducer from its cable. In
these installations, it is
recommended that the
transducer be secured using a
small chain fitted to one of the
chain holes on the top of the
transducer, see figure 3.
When installing the
transducer avoid aiming the
transducer directly at fixed
obstructions as they may
mask the required return
echo from the liquid or solid
level being monitored, see
figure 4.
Flanged versions of the transducer should be installed using plastic
bolts with an insulating gasket between the transducer flange and
the process vessel flange. The bolts should not be fully tightened as
this may cause acoustic resonance that results in increased ring
down. A typical flange application is shown in figure 2.
Once the transducer is installed in position the cable can be routed
back to the PULSAR ultra instrumentation and wired up. If the integral
cable is too short an extension cable and junction box may be used,
see figure 5. The cable can be extended up to 500 m.