16-channel DeltaTron Conditioning Amplifier Range of Instruments

16-channel DeltaTron Conditioning Amplifier Range of Instruments
PRODUCT DATA
16-channel DeltaTron® Conditioning Amplifiers ¾ Types 2694 A, B, C, D
The Type 2694 family of 16-channel DeltaTron conditioning amplifiers comprises general signal-conditioning
amplifiers for voltage and DeltaTron analogue input that provide an analogue output. The amplifiers
support DeltaTron, ISOTRONÒ, ICPÒ and IEPE transducers, such as accelerometers, microphone preamplifiers
and tachometers, and are completely controlled by the provided WindowsÒ-based software.
USES
16-channel, general signalconditioning amplifier for voltage
and DeltaTron analogue input
providing an analogue output
Supports DeltaTron / ISOTRON /
ICPÒ / IEPE transducers such as
accelerometers, microphone
preamplifiers and tachometers
For multichannel applications such
as modal analysis, operational
deflection shapes, microphone
array measurements, etc., where
typically between 16 and 512
channels are employed
Typical measurements on
satellites, gas turbines and large
structures
FEATURES
Multiplexing function enables the
number of transducer channels in
the data acquisition unit to be
increased 16-fold
Fully supports IEEE P1451.4 "A Smart Transducer Interface for Sensors and Actuators", i.e., Transducer Electronic Data
Sheets (TEDS)
Continuous logging of overloads as a function of time, overload type and overload channel
Largest dynamic range of any conditioning amplifier on the market
Floating and single-ended input to deal with ground loop problems
Range of conditioning amplifiers with various functionality to choose from
Optional filters available which can be interchanged by the user
Powered by mains or DC supply
Completely computer-controlled by means of supplied Windows NT®, 2000, XP, 95, 98-based software
Fits into a 19" rack with 16 channels for each unit in height
OLE2.0 interface description provided to enable user to customise measurements using an automotion program
2694
Range of 16-channel Conditioning Amplifiers
Conditioning Amplifier Type 2694 comes in four versions:
Type
Type
Type
Type
Table1
Type 2694 family
functionality
2694 A - Standard version
2694 B - Basic version; less functionality than Type 2694 A
2694 C - Customised version of Type 2694
2694 D - All 16 channels delivered with single and double integration filters
Functions
Type
2694 A
Type
2694 B
Type
2694 C
Type
2694 D
–
–
High-pass Filters 0.1 Hz
High-pass Filters 1 Hz
Floating/Single-ended
Input
–
Gain: –10 dB
Gain: 0 dB
–
Gain: +10 dB
Gain: +20 dB
Gain: +30 dB
–
Gain: +40 dB
–
DeltaTron Input
Voltage Input
IEEE P1451.4 Transducer
Support
No
Optional Filters Possible
Filters installed, e.g., A-,
B-, C-, D- or single and
double integration in 1 to
16 channels
–
–
Optional
Filters Installed: single
and double integration in
all 16 channels
–
–
Optional
Multiplexer Functionality
Signal Overload
Transducer Voltage
Overload
–
Channel Disable/Enable
–
Tacho (ch. 16)
2
Fig. 1 Front panel of Signal Conditioning Amplifier Type 2694
RS–232 interface
to next 2694 unit
(daisy-chain capability)
Status LED
Green:
Channel OK
Red:
Signal overload
Green & Red: Transducer/ Cable failure
Neither:
Channel disabled
RS–232 interface
to host
Chassis
On/Off button
LED
Power
Connected
16 analogue BNC input plugs. Ch.16 is a BNT which also supports a tacho probe
Multiplexer
output on
1 out of 16
16 ch. analogue
output, analogue
Tacho out, TTL
Tacho out
Galvanic and
Isolated DC input
000236
Control Software
A WindowsÒ-based control software program is supplied with Type 2694. The software
enables the conditioning amplifier to be configured for specific measurement tasks.
Type 2694 always retains the last setup used before it is switched off. The control
software also monitors overloads and collects transducer data during measurements.
The minimum system requirement is a PC capable of running WindowsÒ and Internet
Explorer 5.0 or later.
The software which includes a description of the OLE Interface which documents the
objects, properties, parameters, methods, etc., used in the BZ 5291 Setup and Control
Software are available for use when developing an external OLE 2.0 automation program.
This description does not describe everything involved in how to develop an OLE 2.0
program, but is intended as a reference for OLE 2.0 programmers.
Fig. 2
Type 2694
conditioning
amplifiers can be
daisy-chained to at
least 16 Type 2694
units per COM
port. The more
COM ports that are
used, the faster the
RS–232 interface
becomes.
Communication
flow is as indicated.
com 1
com 2
RS–232 cables
COMMUNICATION FLOW
Amplifier Setup
Overload, Status
and Transducer
Information
000279
Setting up Type 2694 Amplifiers
The Type 2694 family of conditioning amplifiers is automatically detected by the software
and displayed in the "File view" and "Link view”. You designate the port(s) used for
the range of conditioning amplifiers yourself. You can select or de-select each Type
2694 amplifier for specific tests, which can be convenient in fixed test setups.
3
You can also set up a Type 2694 conditioning amplifier, even if it is not attached. This
can be done from configuration files that you have previously saved to disk for later
use in measurement situations. By dragging the active Type 2694 Conditioning Amplifier
into the “Setup view”, detailed setup of the amplifier and transducer settings can be
performed.
Fig. 3
File, Link and Setup
views
Alternatively, you can load setups from
the file view and adapt them to the current
configuration by dragging and dropping
previously saved configurations of Type
2694 conditioning amplifiers from the “File
view” to the “Link view”.
Setting up Channel-dependent
Parameters
The individual parameters of the selected
Type 2694 conditioning amplifier(s) can be
shown in the “Setup view”. These are
shown in the amplifier setup and the transducer setup, where parameters that belong to the amplifier and transducer,
respectively, are grouped. Both the amplifier and transducer setups can be modified to include or exclude setup and
monitoring parameters in any order or
type of setup.
Amplifier Setup
In the amplifier setup, you can specify the settings of filters and the gain for each
channel. This includes high-pass filters, optional filters, gain in steps of 10 dB, multiplexer channel, tachometer, and whether single-ended or floating inputs are used.
During measurement, the amplifier setup monitors overloads in the overload column,
and indicates them by changing colour.
Transducer Setup
In the transducer setup, you can key in transducer sensitivities and transducer types,
or they can be read automatically for IEEE P1451.4-capable transducers with standardised TEDS. This includes transducer type number, serial number and sensitivity. Full
alphanumeric descriptions can also be attached to each channel if required.
4
Fig. 4
The amplifier setup
Fig. 5
The transducer
setup
Channel Description
The input signals enter the instrument via BNC sockets on the front panel. Input number
16 is a BNT socket (compatible with the BNC sockets) and supplies the power for an
8-volt tachometer probe. Output is via a 50-pin, sub-D socket. There is also a 1-out-of16 multiplexed output via a BNC socket.
The input and output protection circuits provide effective protection against voltage
transients, e.g., electrostatic discharge, and burst and surge transients.
5
2694 Conditioning Amplifier
With Associated Transducers,
Selected Cables and Accessories
Rack Mounting
19" Rack Mounting Kit KS0046
1
4
5
6
7
8
9
10
12
11
13
14
15
16
Chassis
RS 232 Next Unit
Input (DeltaTron, ISOTRON, IEPE, ICP®):
RS 232 Host
Output
Type
2694
Multiplexed
Output
All Sockets !
1
4
5
6
7
8
9
10
11
12
13
14
15
16
Chassis
RS 232 Next Unit
RS 232 Host
Output
Type
2694
1
4
5
6
7
8
9
10
11
12
13
14
15
16
Multiplexed
Output
Chassis RS 232 Next Unit
All Sockets !
RS 232 Host
Output
Type
2694
Portable Rack
KQ 0158
for
maximum
6 x 2694
1
4
5
6
7
8
9
10
11
12
13
14
15
16
Multiplexed
Output
Chassis RS 232 Next Unit
JP 0145
All Sockets !
RS 232 Host
AC 0104
5m
AO 1382
Double Screen
Cable 1.2 m
2647, 2647A, 2647B,2647C
Output
Type
2694
1
4
5
6
7
8
9
10
11
12
13
14
15
16
Multiplexed
Output
Chassis RS 232 Next Unit
All Sockets !
RS 232 Host
AO 0526
5m
Output
Type
2694
1
4
5
6
7
8
9
10
11
12
13
14
15
16
Multiplexed
Output
Chassis RS 232 Next Unit
All Sockets !
ISOTRON Accelerometer
65-10 / 65-100
RS 232 Host
Output
Type
2694
1
4
5
6
7
8
9
10
11
12
13
14
15
16
Multiplexed
Output
Chassis RS 232 Next Unit
All Sockets !
RS 232 Host
BNC
Output
Multiplexed
Output
All Sockets !
BNC
Brüel & Kjær
Type 2671
No. 2125206
Type
2694
Double Screen Cable
AO 0429, 1.2 m or AO 0426, 3 m or AO 0427, 10 m
5
6
7
8
9
10
11
12
13
14
15
16
Chassis RS 232 Next Unit
AO 0526
5m
BNC
RS 232 Host
Multiplexed
Output
Double Screen Cable 5 m
!
Microdot
AO 1382
BNC
JP 0145
BNT
Software
Miniature
Accelerometer
4507/08
AO 0531
BNC
All Sockets
Array Microphone
4935
Accelerometer
4506
Output
Type
2694
DeltaTron Microphone
Preamplifier 2671
10 m
2694 Conditioning Amplifier
4
SMB
Brüel & Kjær
Type 4935
No. 2126352
AO 0564
BNC
1
Charge Accelerometer
4393
Double Screen Cable 1.2 m
AO 0158
BNT
3m
Microdot
Magnetic Transducer
MM 0002
Photoelectric Probe
MM 0024
2694 Control Software
BZ 5291 Including OLE 2.0 Interface decription and examples
(included with 2694)
Supply Cables via
Cigarette Lighter
2694 standard types: Name and description
2694 Type number
Standard version
2694 A
Basic version, less functionality than Type 2694A
2690 B
Customised version of Type 2694
2690 C
All 16 channels delivered with single and double integration filters
2690 D
LEMO
Powering
AO 0546
Output
3m
Blade
Mains Adaptor
ZG 0426
(included with 2694)
AO 0547
3m
LEMO
Blade
AO 0548
Break-out Cable 50 pol sub-D to 17 BNC 1.5 m
AO 0581 Included with 2694
1.5 m
2694 standard options for Type 2694 A, C, D
Part number
Whole body vibration X, Y & Z direction filter
WH 3206
900 Hz to 1100 Hz band pass filter
WH 3278
ZE 0848
Single and double integration filter
A, B, C and D weighting filters
Individual filters available on request: Maximum of 6 high-pass poles or 8 lowpass poles, with a maximum of 8 poles in all
ZE 0847
WB 1436
128 Ch. Power Supply
LEMO
RS–232 interface Cable (included with 2694)
AO 1440 1.9m
LEMO
2 x AO 0548
000269/2
Fig. 6
Block diagram of
Type 2694 A. Note
that it is identical
to Type 2694 D
except that Type
2694 D has single
and double
integration on all
channels
Voltage Mode
6 mA Transducer Supply
IEEE 1451.4
0.1Hz H.P.
1Hz H.P.
Input
Protection
-10dB
0dB
+10dB
+20dB
+30dB
+40dB
Output
Optional
Filter Module
Output
Filter
Module
Disable
Ch1
Ch2-16 MUX
Floating/Single
ended Input
Zin:
Multiplexed
Output
Zout: 50 // 470 pF
Processor
Board
Overload
1M // 300 pF (Voltage)
100 k // 300 pF (DeltaTron®)
Fig. 7
Block diagram of
Type 2694 B
RS-232
RS-232
000280/2
Voltage Mode
6mA Transducer Supply
IEEE 1451.4
Input
Protection
0.1Hz H.p.
Output
0dB
+20dB
Output
Protection
Floating/Single
ended Input
Ch1
Ch2-16 MUX
Multiplexed
Output
Z Out: 50 Ω // 470pF
RS-232
Z In : 100 kΩ // 300 pF (DeltaTron®)
Overload
Processor
Board
RS-232
000281/2
Fig. 8
Front view of pin
connections on 50pole, sub-D output
socket
No.
/1
Support of Transducers with TEDS according to IEEE P1451.4
The Type 2694 family can identify transducers with built-in TEDS and which comply
with the proposed standard IEEE P1451.4, "A mixed-mode smart transducer interface
for sensors and actuators". Such transducers can, in stand-alone mode, be identified
by their type numbers and serial numbers, and their sensitivities, read and displayed
via the Type 2694 control software.
Table2
The two modes of
access to
IEEE P1451.4 data
8
Mode
Features
Implementation
StandAlone
Access to 3 parameters - type number,
serial number and sensitivity
Easy to use. Commands via
RS-232. Supported by control
software
Transparent
Protocol
No limitations on access to data
contained transducer. Independent of
changes to IEEE P1451.4
Customised program required
In stand-alone mode, the internal processor in Type 2694 reads all data contained in
the TEDS, extracts three parameters (type number, serial number and transducer sensitivity), and makes them accessible via the RS–232 cable using simple comands. Control
software BZ 5291 provided with Type 2694 displays these parameters where relevant.
The transparent protocol mode, which is also embedded in Type 2694, enables unlimited
access to the IEEE P1451.4-compatible data contained in the transducer. The transparent
protocol is independent of any future changes to IEEE P1451.4. Via a PC, the user can
freely read the TEDS in the transducers. This application requires a customised program.
Electrical Characteristics
Fig. 9
Amplitude
response at low
frequency
Fig. 10
Amplitude
response as a
function of gain
setting
9
Fig. 11
Phase response as a
function of high
pass filters and
gain. Note that the
phase at low
frequency is
independent of the
gain
Fig. 12
Typical broadband
output noise
measured in 22 kHz
bandwidth as a
function of gain
setting
Output Noise in 22 kHz bandwidth
(Vms)
1mV
(measured at output socket)
100 V
10 V
1 V
-10
0
10
20
30
40
Gain in dB
000287/1
Fig. 13
Typical equivalent
input noise
measured in 22 kHz
bandwidth as a
function of gain
setting
Equivalent input noise in 22 kHz bandwidth
(Vms)
1mV
(= output noise / gain)
100 V
10 V
1 V
-10
0
10
20
30
40
Gain in dB
000288/1
Fig. 14
Equivalent input
noise per square
root Hz (measured
in 1 Hz bandwidth)
as a function of
frequency
µV
µV
µV
High-pass
High-pass
/1
10
Fig. 15
Typical amplitude
characteristics for
velocity and
displacement filters
(i.e. single and
double integration
respectively) with
1 Hz cut-off
frequency
Fig. 16
Typical amplitude
characteristics for
acoustical A-, B-, Cand D-weighting
filters
11
Compliance with Standards
,
CE - mark indicates compliance with: EMC Directive and Low Voltage Directive.
C - Tick mark indicates compliance with the EMC requirements of Australia and New Zealand
Safety
EN 61010 - 1 and IEC 61010 - 1: Safety requirements for electrical equipment for measurement, control
and laboratory use.
UL 3111 - 1: Standard for Safety - Electrical measuring and test equipment
EMC Emission
EN 61326 - 1: Electrical equipment for measurement, control and laboratory use. EMC requirements.
Part 1: General requirements.
EN 50081 – 1: Generic emission standard. Part 1: Residential, commercial and light industry.
EN 50081 – 2: Generic emission standard. Part 2: Industrial environment.
CISPR 22: Radio disturbance characteristics of information technology equipment. Class B Limits.
FCC Rules, Part 15: Complies with the limits for a Class B digital device.
EMC Immunity
EN 61326 - 1: Electrical equipment for measurement, control and laboratory use. EMC requirements.
Part 1: General requirements.
EN 50082 – 1: Generic immunity standard. Part 1: Residential, commercial and light industry.
EN 50082 – 2: Generic immunity standard. Part 2: Industrial environment.
ISO 7637 – 1, 7637 - 2 and 7637 - 3: Road Vehicles — Electrical Disturbance by Conduction and Coupling.
Note 1: Refer to “Environmental Susceptibility” in specifications.
Note 2: The above is guaranteed using the accessories in this Product Data only.
Temperature
IEC 60068 – 2 – 1 & IEC 60068 - 2 – 2: Environmental Testing. Cold and Dry Heat.
Operating Temperature: – 10 to + 55 °C ( 14 to 131 °F )
Storage Temperature: –25 to + 70 °C ( - 13 to 158 °F )
IEC 60068 – 2 – 14: Change of Temperature: - 10 to + 55 °C ( 2 cycles, 1 °C/min. )
Humidity
IEC 68 – 2 – 3: Damp Heat: 90% RH (non-condensing at 40 °C ( 104 °F ))
Mechanical
Operating ( peak values )
MIL – STD – 810C: Vibration: 12.7 mm, 15 m/s2, 5 – 500 Hz
Non-operating:
IEC 60068 – 2 – 6: Vibration: 0.3 mm, 20 m/s2, 10 – 500 Hz
IEC 60068 – 2 – 27: Shock: 1000 m/s2
IEC 60068 – 2 – 29: Bump: 1000 bumps at 250 m/s2
Enclosure
IEC 60529: Protection provided by enclosures: IP20
Specifications
-
Types 2694 A, B, C, D
DELTATRON INPUT/VOLTAGE INPUT
Connector:
Channel 1 to 15: BNC
Channel 16: BNT (CCLD, voltage or tacho)
Grounding: Single-ended or floating
Input Impedance:
1 MW // 300 pF (V oltage mode* )
100 kW // 300 pF ( DeltaTron mode )
Maximum Input:
AC ( peak ): ± 10 V
and
AC ( peak ) + DC + Max. Common Mode Voltage ( AC ( peak ) + DC ):
–11 to + 22 V
Common Mode: £ ± 5 V
Input Protection: ± 35 Vp ( non-destructive );
± 5 Vp Common mode Voltage ( non-destructive )
Common Mode Rejection Ratio: > 60 dB (up to 1 kHz ) @ - 10 dB
typical; > 70 dB ( up to 1 kHz ) @ 0 dB to + 40 dB typical
Amplifier Gain: - 10 dB*; 0 dB;
10 dB*; 20 dB; 30 dB*; 40 dB*
Transducer Supply
DeltaTron Current: 6 mA ± 15%
DeltaTron Voltage: 25 V ± 10%
Tacho Probe Supply (channel 16 only): + 8 V DC max. 80 mA at
BNT inner shield (short-circuit protected)
Frequency Range ( - 1 dB / - 10%): 0.1 Hz to 50 kHz
High-pass Filter (20 dB /decade): (one pole in input and one pole*
in output)
A, C, D: flow = 0.1 Hz or 1 Hz @ –1 dB (40 dB/decade)
B: flow = 1Hz @ –1 dB (20 dB / decade)
Low-pass Filter ( - 1 dB): 50 kHz
Harmonic Distortion @ 1 kHz, Vout < 5 Vrms: < 0.01 %,
typically < 0.001 %
Rise Time: < 3.5 m s ( 100 kHz bandwidth)
Channel-to-channel Phase Match (calculated values without
optional filters):
flow £ f £ 50 kHz : £ 2 degrees
10 ´ flow £ f £ 5 kHz : £ 0.25 degrees
100 ´ flow £ f £ 500 Hz : £ 0.025 degrees
flow > 0.1 or 1 Hz
Flexible Filter Configuration – Built-in filters:
Optional Filters*
In addition to the built-in, high-pass filters, a number of optional
standard filters can be installed, for example, A-, B-, C-, and Dweighting (complies with IEC 651 Type 0) and single/double
integration
Inherent Noise (referred to input, gain ³ 20 dB ):
£ 3 µV A-weighting, typical value < 1.8 µV;
£ 5 µV lin. 2 Hz to 22.4 kHz; typical value < 2.8 µV lin. 2 Hz to
22.4 kHz
Typical Broadband Output Noise: < 1.8 m V A-weighted; < 2.8 m V
lin. 2 Hz to 22.4 kHz
3.0 µV rms
0 dB
4.6 µV rms
10 dB
9.0 µV rms
6.0 µV rms
20 dB
22 µV rms
14.5 µV rms
30 dB
65 µV rms
44.0 µV rms
11
40 dB
200 µVrms
150 µVrms
Dynamic Range (Typical): > 120 dB, 22.4 kHz BW @ 0 dB gain;
> 125 dB, A-weighting @ 0 dB gain (Max. output voltage rms/
broadband output noise)
Accuracy: ± 0.1 dB. All gain-steps @ 1 kHz, typically ± 0.05 dB
ENVIRONMENTAL SUSCEPTIBILITY (REFERRED TO OUTPUT AT
MAX. GAIN)
Magnetic Field: < 10 m V / ( A/m)
Electromagnetic Field (measured with LK0013 on cable):
Type 2694 A, C, D:
Radiated < 1 mV @ 10 V/m
Conducted < 20 mV @ 10 V (floating input)
Conducted < 0.2 mV @ 10 V (single-ended)
Type 2694 B:
Radiated < 10 mV @ 10 V/m
Conducted < 200 mV @ 10 V (floating input)
Conducted < 2 mV @ 10 V (single-ended)
Vibration ( 10 to 500 Hz ): < 100 m V / ( m/s2 )
Transducer Testing*: Transducer voltage overload ~ failure in
transducer or in the cables between Type 2694 and transducer
Channel Separation: > 100 dB @ 1 kHz
ANALOGUE OUTPUT
Connector: 50 pol. sub-D
Connector Multiplexed Output: BNC
Grounding: Single-ended
Output Impedance: 50 W // 500 pF
Maximum Output: = 20 Vpp (without clipping)
Maximum DC Offset: < ± 10 mV (typical < ± 2 mV)
Output Current: > 10 mA rms
Output Drive Capacity: 100 m of cable length (100 pF / m) to
20 kHz; 1000 m of cable length (100 pF / m) to 2 kHz
*Not available with version 2694B
POWER SUPPLY
Floating (Max. voltage between chassis and power supply
ground: ± 10 V)
External DC Power Input: Complies with ISO 7637 - 1(12 V) and
ISO 7637-2 (24 V)
Input Range: 10 to 33 V DC
Mains Supply: Supported via Mains Adaptor ZG 0400 (included
with Type 2694) 90 - 264 V AC, 40 - 65 Hz
Always Power-on Mode: Type2694 powers up as soon as electrical
supply is selected
Switchable Power-on Mode: Type 2694 can be powered on and
off either manually (using the on/off button), or via a command
over the RS-232 cable
Power Consumption: 18 to 30 W (depending on input voltage
and device configuration)
DIGITAL CONTROL INTERFACE
Serial Interface: RS - 232
Computer Control: All functions are controlled via the RS - 232
interface. You can "daisy-chain" up to 16 units on each COM port
Support of Transducers with TEDS according to IEEE P1451.4:
Type 2694 can on request ( via RS - 232 ) read:
Serial Number, Transducer Type and Sensitivity from all relevant
transducer types designed in accordance with the IEEE P1451.4.
There is also implemented a transparent protocol option that
makes it possible to collect the whole contents of the TEDS
DIMENSIONS AND WEIGHT
The members of the Type 2694 family are all designed to fit in
a 19² rack and use only 1 Unit in height. All connectors are
placed on the front panel
The overall dimensions are:
Height: 43.6 mm (1.7²)
Width: 449 mm (17.7²)
Depth: 254 mm (10.0²)
Weight: 2.5 kg (5.5 lb.)
Ordering Information
ZG 0426
Mains Adaptor 90 - 264 V AC
BZ 5291
Control Software
AO 1440
RS -232 Interface Cables 1.9 m
AO 0581
Break-out cable 1.5 m 50-pin sub-D to 17 BNC
Optional Accessories:
KQ 0158
KS 0046
LK 0013
WH 3206
WH 3278
ZE 0847
ZE 0848
Portable Rack
19² Rack Mounting Kit
Ferrite Clamp
Whole Body Vibration X, Y and Z-direction Filter
900 to 1100 Hz Band Pass Filter
A-, B-, C-, D-weighting Filters
Single and Double Integration Filter
TRADEMARKS
ICP is a registered trademark of PCB Piezotronics
ISOTRON is a registered trademark of Endevco Corporation
Windows and Windows NT are registered trademarks of Microsoft Corporation in the United States and/or other countries
Rosendahls Bogtrykkeri
Type 2694 A, B, C, D 16-channel DeltaTron Conditioning
Amplifiers include the following accessories:
BP 1882 – 13
02/11
Brüel & Kjær reserves the right to change specifications and accessories without notice
HEADQUARTERS: DK-2850 Nærum · Denmark · Telephone: +4545800500 · Fax: +4545801405 · http://www.bksv.com · e-mail: info@bksv.com
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Switzerland (0)1 880 70 35 · Taiwan (02)7139303 · United Kingdom (0)1438 739 000 · USA 800 332 2040
Local representatives and service organisations worldwide
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