DESCRIPTION
The installation is now complete; refer to the PULSAR
ultra
user
manual for instructions on how set up the PULSAR
ultra
instrument.
dBi Flange Dimensions
DIN (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
All dimensions in mm
Wire the transducer into the relevant PULSAR
ultra
instrument as
shown in figure 6. Terminal numbers will depend on the unit.
The dBi HART transducer range has been specified and designed to
meet the demanding requireme
nts of today’s process level
measurement applications for liquids and solids.
All dBi transducers are 2 wire and can either be used in digital HART
mode or as 4-20mA loop powered devices. The dBi transducers are
set up using a hart modem with either proprietary HART software
such as Pactware or Pulsar dBi HART PC software.
The dBi 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 they provide unmatched
performance in industrial process level measurement.
All dBi transducers are fitted with integral temperature compensation.
Standard cable lengths 5, 10, 20 or 30m.
Optional submersion shield is available to prevent spurious signal if
the transducer becomes submerged.
A range of flange mounting options (ANSI & DIN) with or without a
PTFE facing to give 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.
P
rocess Connection: 1” BSP
Operating Temperature: -40 to +80°C
Ingress Protection: IP68
Hazardous Area Installation
All dBi transducers are ATEX certified for use in hazardous areas.
There are two different versions:
One certified to II 1 G Ex ia IIC T4 Ga & II 1 D Ex ia IIIC T130ºC Da
(Trac 12ATEX0022X) for use in zone 0, 1 & 2 applications (safety
barrier required), and another certified to II 2 G Ex mb IIC T4 Gb & II
2 D Ex mb IIIC T130ºC Db (Trac 12ATEX0023X) suitable for use in
zones 1 & 2 ( no barriers required).
The ‘X’ in the certification No.’s indicates that certain special
conditions apply: see EC Declaration of conformity on the flip side of
this document.
Ex mb version
– This version must be supplied from apparatus that
provides protection from prospective short circuit currents up to
1500A. This fuse is fitted in the safe area end of the cable.
Wiring Detail
Colour
Description
Limits
RED
DC Power +ve
28V DC max.
BLACK
DC 0V
GREEN
Cable Screen
GENERAL 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.
FIGURE 1 FIGURE 2 FIGURE 3
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 2.
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 3.
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.
NOTE: All extension cables must use 2 or 3 core screened cables
not exceeding 100nF between conductor to screen and 40
ohms/conductor.
ATEX labelling for the two versions of protection Ex ia & Ex mb
See full manual for more detail