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: +44 (0)1684 891371
Malvern Fax: +44 (0)1684 575985
WR14 1JJ email: info@pulsar-pm.com
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

Summary

SPECIFICATIONS

EU DECLARATION OF CONFORMITY

Declares conformity with EU directives for ATEX, EMC, and RoHS for dB series products.

APPLICATIONS

Hazardous Area Installation

Details ATEX certified versions and special conditions for hazardous area installations.

INSTALLATION

Overview

1. dB Series Transducers
   1. Function Description
   2. Important Technical Specifications
   3. Usage Features
   4. Maintenance Features

dB Series Transducers

The dB series transducers are designed for demanding process level measurement in both liquid and solid applications. They incorporate the latest in ultrasonic design technology, making them suitable for a wide range of short-range liquid and solid level measurements.

Function Description

The dB transducers operate by emitting ultrasonic pulses and receiving the reflected echoes to determine the distance to a liquid or solid surface. They are based on a PZT ceramic transducer element with a nominal beam angle of 10° @ -3 dB (depending on the unit). When coupled with the DATEM® signal processing used in PULSAR ultra range level and flow measurement instrumentation, they provide unmatched performance in industrial process level measurement.

All dB transducers include integral temperature compensation to ensure accuracy across varying environmental conditions. They also feature a unique low-energy interface with PULSAR ultra instrumentation, which allows for Intrinsic Safety (Exia) approval. This interface is frequency independent, enabling transducers to be interchanged without re-tuning the drive electronics.

Important Technical Specifications

The dB series offers a range of models with varying specifications:

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 areas: -40 to +75°C (dB3/dBmach3 -30 to +75°C) Ingress Protection: IP68.

Flange Dimensions (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

Flange Dimensions (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

Electrical Connection: The transducer connects to the PULSAR ultra instrument. The wiring involves:

• Red: Power
• White: Signal
• Black & Green: 0V and Screen Extension cables must be 2 or 3 core screened, not exceeding 100nF between conductor to screen and 40 ohms/conductor. Integral cable lengths are 5, 10, 20, or 30m, and can be extended up to 500m using an extension cable and junction box.

Usage Features

Installation: The dB transducer should be installed directly above the liquid or solid level, with its axis perpendicular to the surface being measured. Installation can be achieved using the 1" BSP thread on top of the transducer or with the supplied 1" BSP to M20 thread adapter.

For flanged versions, plastic bolts and an insulating gasket between the transducer flange and the process vessel flange are recommended. Bolts should not be fully tightened to avoid acoustic resonance that could increase ring down.

In situations where direct mounting is not possible, the transducer can be suspended from its cable. It is recommended to secure the transducer using a small chain fitted to one of the chain holes on top of the unit.

When installing, avoid aiming the transducer directly at fixed obstructions, as these may mask the required return echo.

Hazardous Area Installation: All dB transducers are ATEX certified for use in hazardous areas, with two different versions:

1. Exia IIC T6 (Sira 02ATEX2103X): Certified for use in zone 0, 1, 2, 20, 21 & 22 applications (requires a safety barrier).
   • Special Conditions: Due to the plastic housing, electrostatic discharge may occur. Do not install in conditions conducive to static charge buildup if group II category 1 is required. Clean only with a damp cloth.
2. 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).
   • Special Conditions: 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.

Accessories:

• An optional submersion shield is available to prevent spurious signals if the transducer becomes submerged.
• A range of flange mounting options (ANSI & EN1092) with an optional PTFE facing for improved chemical resistance.
• An aiming kit is recommended for solids level measurement to help align with the material surface and angle of repose.

Maintenance Features

Routine Inspection: For dB transducers installed in Zones 20, 21 & 22, routine inspection is necessary to prevent the buildup of a dust layer.

Cleaning (Exia version): If the Exia version is used in applications requiring group II category 1, clean only with a damp cloth to avoid electrostatic discharge.

Disposal: Dispose of the 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).

Pulsar dB Series Specifications

General

Brand	Pulsar
Model	dB Series
Category	Transducer
Language	English