HBK FS22DI User manual

FS22DI
Industrial BraggMETER DI
ENGLISH
User Manual

Hottinger Brüel & Kjaer GmbH
Im Tiefen See 45
D-64293 Darmstadt
Tel. [phone]
Fax [phone]
[email protected]
www.hbkworld.com
HBK FiberSensing, S.A.
Rua Vasconcelos Costa, 277
4470-640 Maia
Portugal
Tel. [phone]
Fax [phone]
[email protected]
www.hbm.com/fs
Mat.:
DVS: A04248 07 E00 00
02.2022
Interrogator version: v2.0
SW version: v1.8
EHottinger Brüel & Kjaer GmbH
Subject to modifications.
All product descriptions are for general information
only. They are not to be understood as a guarantee of
quality or durability.

3
FS22DI
TABLE OF CONTENTS
TABLE OF CONTENTS
1 Technical Details 5.................................................
1.1 General Information 5...............................................
1.2 System Components 5...............................................
2 Regulatory and Certification Considerations 6..........................
2.1 Environment Considerations 6........................................
2.1.1 Disposal of your Old Appliance 6......................................
2.2 Laser Safety 6......................................................
2.2.1 Symbols 6.........................................................
2.2.2 Class 1 Laser 7.....................................................
2.2.3 General Precautions Considerations 7..................................
2.3 Certification 7......................................................
2.3.1 CE marking 7.......................................................
2.3.2 Degree of protection 7...............................................
2.4 The marking used in this document 8..................................
3 Operation 9........................................................
3.1 Connectors 9.......................................................
3.1.1 Standard 9.........................................................
3.1.2 Rack-Mountable 10...................................................
3.2 Setting Up 10........................................................
3.2.1 Power Supply 10.....................................................
3.2.2 Optical Connectors 11................................................
3.2.3 Ethernet Connection 11...............................................
3.3 Maintenance 11.....................................................
3.3.1 Ventilation 11.......................................................
3.3.2 Calibration 12.......................................................
3.4 Switching On 12.....................................................
3.5 Switching Off 12.....................................................
3.6 Operating the Interrogator 13..........................................
3.6.1 Network Properties 13................................................
3.6.2 Interrogator IP Address 15............................................
3.6.3 Synchronization 16...................................................
3.6.4 Operation 19........................................................
4 Measuring Examples 23..............................................
4.1 Typical Configuration 23..............................................
4.2 Definitions 24.......................................................
4.2.1 Wavelength 24......................................................

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TABLE OF CONTENTS
4
4.2.2 Power 25...........................................................
4.2.3 Gain 26.............................................................
4.2.4 Threshold 27........................................................
4.3 Common Measuring Difficulties 28.....................................
4.3.1 Dirty Connector 28...................................................
4.3.2 Broken Connector 30.................................................
4.3.3 Reflective Fiber Ending 30.............................................
4.3.4 Cut Fiber 30.........................................................
4.3.5 Fuse Failure 32......................................................
5 Remote Communications 33..........................................
5.1 Communication Protocol Syntax 33.....................................
5.1.1 Command Syntax 33.................................................
5.1.2 Common Commands 34..............................................
5.1.3 System Commands 35................................................
5.1.4 Acquisition Commands 37.............................................
6 BraggMONITOR DI Software Details 45.................................
6.1 Software Version 45..................................................
6.2 Install and Uninstall Software 45.......................................
6.2.1 System Requirements 45..............................................
6.2.2 Software Installation 45...............................................
6.2.3 Software Uninstall 46.................................................
6.3 Running the Software 46..............................................
6.3.1 Network Properties 46................................................
6.3.2 Run as Administrator 46..............................................
7 BraggMONITOR DI User Interface 48...................................
7.1 General Bar 48......................................................
7.1.1 Acquisition 50.......................................................
7.1.2 Software and Interrogator Information 54................................
7.1.3 Exit Application 54...................................................
7.2 Graphical Area 54
....................................................
7.2.1 Graphical View 55....................................................
7.2.2 Numerical View 55...................................................
7.2.3 Spectral View 56.....................................................
7.2.4 FFT View 58.........................................................
7.2.5 Configuration 59.....................................................
7.2.6 SCPI Interface 66....................................................

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TECHNICAL DETAILS
1 TECHNICAL DETAILS
1.1 General Information
The Industrial BraggMETER DI is a continuous swept laser scanning interrogator for fiber
Bragg grating (FBG) sensors. It includes a traceable wavelength reference that provides
continuous calibration to ensure system accuracy over long term operation. The high
dynamic range and high output power allow high resolution to be attained even for long
fiber leads and lossy connections.
Multiple sensors can be connected in series in each optical fiber, which in combination
with the eight optical channels with parallel acquisition for the FS22 - Industrial
BraggMETER DI, makes it particularly suitable for large scale sensing networks, acquiring
a large number of sensors simultaneously, providing 1000 S/s acquisition rates with sub
picometer resolution.
The BraggMETER is available either in Standard and Rack-mountable formats.
This Manual applies to the following equipment:
SK-FS22 (1000 S/s option)
S1-FS22DI-ST/4CH
S1-FS22DI-ST/8CH
HBK FiberSensing interrogators are compatible with catman® software, a powerful tool
for data acquisition and processing.
1.2 System Components
The Industrial BraggMETER DI set includes:
Standard format Rack-mountable format
- Interrogator
- AC-DC power supply unit 24V
- Ethernet cable (L ~2 m)
- Mounting blocks with M6 screws
- Connector protection caps
- Mounting hole protection caps
- Quick start guide
- Digital support material
- Calibration certificate
- Interrogator
- Power cord
- Ethernet cable (L ~2 m)
- Connector protection caps
- Quick start guide
- Digital support material
- Calibration certificate

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REGULATORY AND CERTIFICATION CONSIDERATIONS
6
2 REGULATORY AND CERTIFICATION CONSIDERATIONS
2.1 Environment Considerations
2.1.1 Disposal of your Old Appliance
When the attached symbol combination - crossed-out wheeled
bin and solid bar symbol is attached to a product it means the
product is covered by the European Directive 2002/96/EC and is
applicable in the European Union and other countries with sepa
rate collection systems.
All electrical and electronic products should be disposed of separately from the munici
pal waste stream or household via designated collection facilities appointed by the gov
ernment or the local authorities. The correct disposal of your old appliance will help pre
vent potential negative consequences for the environment and human health. For more
detailed information about disposal of your old appliance, please contact your city office,
waste disposal service or distributor that purchased the product.
HBK FiberSensing is a manufacturer registered in the ANREEE - "Associação Nacional
para o Registo de Equipamentos Eléctricos e Electrónicos" under number PT001434.
HBK FiberSensing celebrated a "Utente" type contract with Amb3E - "Associação Por
tuguesa de Gestão de Resíduos de Equipamentos Eléctricos e Electrónicos", which
ensures the transfer of Electrical and Electronic appliance waste management, i.e. plac
ing Electronic and Electrical appliances in the Portuguese market, from the manufacturer
HBK FiberSensing to Amb3E.
2.2 Laser Safety
The FS22 - Industrial BraggMETER DI interrogator contains a laser in its core. A laser is a
light source that can be dangerous to people exposed to it. Even low power lasers can be
hazardous to a person's eyesight. The coherence and low divergence of laser light means
that it can be focused by the eye into an extremely small spot on the retina, resulting in
localized burning and permanent damage.
The lasers are classified by wavelength and maximum output power into the several
safety classes: Class 1, Class 1M, Class 2, Class 2M, Class 3R and Class 4.
2.2.1 Symbols
Warning symbol Class 1 Laser symbol

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FS22DI
REGULATORY AND CERTIFICATION CONSIDERATIONS
2.2.2 Class 1 Laser
The FS22 - Industrial BraggMETER DI is a class 1 laser product:
«Any laser or laser system containing a laser that cannot emit laser radiation at levels
that are known to cause eye or skin injury during normal operation.»
It is safe under all conditions of normal use. No safety requirements are needed to use
Class 1 laser devices. This product contains a laser within an enclosure that prevents
exposure to the radiation and that cannot be opened without shutting down the laser.
2.2.3 General Precautions Considerations
Everyone who uses a laser equipment should be aware of the risks.
The laser radiation is not visible to the human eye but it can damage user's eyesight.
The laser is enabled when the interrogator is turned on.
Users should never put their eyes at the level of the horizontal plane of the optical
adapters of the interrogator or uncovered optical connectors.
Adequate eye protection should always be required if there is a significant risk for eye
injury.
When an optical connector is not in use (no optical cable plugged to the interrogator), a
proper connector cap must be used.
The optical connectors are subjected to maintenance and/or inspection. Please refer to
section 4.3.1 for maintenance procedure.
Do not attempt to open or repair a malfunction interrogator. It must be returned to HBK
FiberSensing for repair and calibration.
2.3 Certification
2.3.1 CE marking
This product carries the CE marking and complies with the applicable international
requirements for product safety and electromagnetic compatibility, according to the
following Directives:
SLow Voltage Directive (LVD) 2014/35/EU - Electrical Safety
SElectromagnetic Compatibility (EMC) Directive 2014/30/EU
It is in compliance with the EN61326/EN55011 Emission Radiated Test Class A, under the
Electromagnetic Compatibility Standard.
The corresponding Declaration of Conformity is available upon request.
2.3.2 Degree of protection
In compliance with the IEC/EN 60529 Degrees of protection provided by enclosures is:

FS22DI
REGULATORY AND CERTIFICATION CONSIDERATIONS
8
SFor the Standard format: IP40 certification (protection against the ingress of solids
larger than 1 mm in diameter).
SFor the Rack-mountable format: IP20 certification (protection against the ingress of
solids larger than 12.5 mm in diameter).
2.4 The marking used in this document
Important instructions for your safety are specifically identified. It is essential to follow
these instructions in order to prevent accidents and damage to property.
Symbol Significance
CAUTION This marking warns of a potentially dangerous
situation in which failure to comply with safety
requirements can result in slight or moderate physical
injury.
Notice This marking draws your attention to a situation in
which failure to comply with safety requirements can
lead to damage to property.
Important
This marking draws your attention to important in
formation about the product or about handling the
product.
Tip
This marking indicates application tips or other
information that is useful to you.
Information
This marking draws your attention to information
about the product or about handling the product.
Emphasis
See …
Italics are used to emphasize and highlight text and
identify references to sections, diagrams, or external
documents and files.
uThis marking indicates an action in a procedure

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OPERATION
3 OPERATION
3.1 Connectors
3.1.1 Standard
Front view Back view
Fig. 3.1 Front and back view of FS22DI Standard
The connectors and buttons in Fig. 3.1 are:
1Optical Output Connectors (FC/APC)
2ON/OFF Button
3Power Connector
4Ethernet Connector
5POWER and STATUS LEDs

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OPERATION
10
3.1.2 Rack-Mountable
Front view
Back view
Fig. 3.2 Front and back view of FS22DI Rack-Mountable
The connectors and buttons in Fig. 3.2 are:
1ON/OFF Button
2POWER and STATUS LEDs
3Optical Output Connectors
4Power Connector
5Electric Fuse
6Safety Power Button
7Fans
8Ethernet Connector
3.2 Setting Up
3.2.1 Power Supply
To start the FS22 - Industrial BraggMETER DI interrogator connect the power cable to the
interrogator Power Connector (number 3in Fig. 3.1 or number 4in Fig. 3.2). To acknowl
edge proper power supply, the POWER LED will turn green during 2 seconds after con
necting the power supply.

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OPERATION
Notice
For the Standard version of the interrogator the power supply must have a minimum of
30 W, with an output voltage between 12-36 v and must withstand a peak of 4 A for at least
4 ms.
Information
The interrogator must be powered using a power supply source not shared with other
equipment's. A replacement AC-DC power supply unit 24 V (1-NTX001) for the Standard
version or Power Cable (1-KAB274) available with different plug formats can be ordered
directly from HBK.
3.2.2 Optical Connectors
The Industrial BraggMETER DI can be purchased either with FC/APC, or SC/APC optical
connectors. Number 1in Fig. 3.1 and number 3in Fig. 3.2 exemplifies FC/APC connec
tors.
Attention should be paid to the cleaning of the optical connectors. A dirty connector can
compromise the measurement and will degrade the performance of the interrogator. It is
advisable to frequently clean the connectors using appropriate tools.
FS22 - Industrial BraggMETER DI can have one, four or eight optical channels in parallel.
3.2.3 Ethernet Connection
Connect the Ethernet RJ45 connector directly to a PC using a Ethernet cross-over cable,
or to a network connector using a direct Ethernet cable (in this case, the Industrial Brag
gMETER DI must be in the same subnet as your Local Network).
Important
The interrogator default network configuration is "10.0.0.150:255.0.0.0:0.0.0.0".
3.3 Maintenance
3.3.1 Ventilation
The FS22DI is an electronic equipment with active ventilation, meaning that it uses fans
for thermal control of the device. Fine dust particles over time can reduce the life time of
optical and electronic components leading to a general degradation of the equipment, so
it is important to prevent dust from entering the device. For that reason the interrogators
should be kept on a controlled environment, far or protected from major dust areas.

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OPERATION
12
3.3.2 Calibration
BraggMETER interrogators have a built-in traceable wavelength reference that ensures
calibrated measurements at all time. For this reason, a compulsory periodic calibration is
not required. Nevertheless, for regulatory reasons or internal rules, a periodic certified
calibration procedure is sometimes required. For those cases, the calibration service is
available and can be requested to HBK FiberSensing.
3.4 Switching On
Pressing the “ON/OFF" button (number 2in Fig. 3.1 or number 1in Fig. 3.2) will start the
interrogator. The STATUS LED (number 5in Fig. 3.1 or number 2in Fig. 3.2) will start
blinking at 2 Hz. After approximately 10 seconds it will start blinking at 1 Hz. This means
that the interrogator is already on and responsive, but the optoelectronic module is still
warming up. After approximately 60 seconds it should stay on permanently. This means
that the interrogator is able to measure.
Status LED
Blinking 2 Hz
Status LED
On
Status LED
Blinking 1 Hz
CorrectWrong
Status LED
Blinking 2 Hz
Status LED
Blinking 5 Hz
(initialization issues)
Status LED
Blinking 1 Hz Status LED
Blinking 5 Hz
(measurement issues)
Fig. 3.3 Switching On button actions according to pressured time
Information
If the interrogator does not start correctly, the STATUS LED will blink faster. If this happens,
please contact HBK FiberSensing technical support.
3.5 Switching Off
To avoid accidental shut-down of the interrogator, press the "ON/OFF" button (number 2
in Fig. 3.1 or number 1in Fig. 3.2) between 2 and 6 seconds (Fig. 3.4).
If for some reason the 6 seconds are exceeded and the button is released before 10 sec
onds are over, the interrogator will remain ON (Fig. 3.5).

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OPERATION
Notice
If the “ON/OFF” button is pressed more than 10 seconds, changes on the interrogator con
figuration are performed and connection might be lost. See section 3.6.2, under Resetting
IP to Default, for further details.
POWER LED
blinking at 1 Hz
Fig. 3.4 Power led while pressing Switching Off between 2 s and 6 s
POWER LED
blinking at 1 Hz
POWER LED ON
Fig. 3.5 Power led while pressing Switching Off between 6 s and 10 s
3.6 Operating the Interrogator
3.6.1 Network Properties
To operate the FS22 - Industrial BraggMETER DI from a personal computer, the PC net
work properties should be set so that both elements are configured in the same subnet.
To configure your personal computer so that it is on the same subnet as the default for
the interrogator, proceed as follows:
uOn the control panel choose Network Connections
uSelect the LAN connection. The window displayed in Fig. 3.6 will appear. Click on
Properties.

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OPERATION
14
Fig. 3.6 Local Area connection Status
uSelect the Internet Protocol (TCP/IP) and click on the Properties button (Fig. 3.7).
Fig. 3.7 Local Area connection properties

15
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OPERATION
uSet the IP address and the Subnet mask (Fig. 3.8).
Fig. 3.8 Internet Protocol Version 4 Properties
uPress OK.
3.6.2 Interrogator IP Address
Changing IP
The interrogator defaullt network properties are 10.0.0.150:255.0.0.0:0.0.0.0. These can
be changed using the SCPI commands or the BraggMONITOR DI Software. See Section
X.X Change IP for further details.
The interrogator proceeds with a change of these properties when
:SYST:IPAD:N.N.N.N:N.N.N.N:N.N.N.N command is sent. See section 5.1.3 “System com
mands” under IP Address for further details.

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OPERATION
16
Information
The definition of the network properties shall comprise three digits to define each number
– e.g., 010.000.000.150:255.000.000.000:000.000.000.000 –.
Resetting IP to Default
If for any chance there is the need to physically change the IP address of the interrogator,
there is a reset procedure that consists on pressing the ON/OFF button for more than
10 seconds.
When the button is being pressed for 10 seconds the POWER LED blinks 3 times and
goes OFF. At this moment the ON/OFF button can be released and the reset of IP address
will happen.
Resetting IP to Default
If by any chance there is the need to physically change the IP address of the interrogator,
press the "ON/OFF" button for more than 10 seconds to reset the interrogator.
When the button is being pressed for 10 seconds the POWER LED blinks 3 times and
goes OFF. The "ON/OFF" button can then be released and the IP Address will be reset.
POWER LED
blinking at 1 Hz
POWER LED ON POWER LED blinks
3 times and goes OFF
Fig. 3.9 Power led while pressing Switching Off for more than 10 s
This procedure resets the interrogator changing its IP address to the default and its mea
suring settings to the last ones stored.
Information
The interrogator default network properties are "10.0.0.150:255.0.0.0:0.0.0.0".
3.6.3 Synchronization
In order to achieve synchronous measurements between different devices the NTP (Net
work Time Protocol) synchronization via Ethernet must be used.

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OPERATION
Each optical Interrogator can synchronize its internal clock with an NTP server. It is possi
ble to achieve accuracies of 1ms or higher, depending on whether or not a dedicated NTP
server is being used.
Further information about NTP can be found at http://www.ntp.org
Measuring systems typology
A measurement system can be as simple as a single interrogator or a bit more complex
with combined interrogators with the same or different sampling rates, and interrogators
combined with other equipment.
For the usage of a single interrogator no special synchronization
is needed.
BraggMONITOR DI software can only operate one interrogator at
a time. If an NTP server is running on the same PC as the Brag
gMONITOR DI, the interrogator internal clock – hence Brag
gMONITOR DI – will sync.
If more than one interrogator is used, synchronization becomes
important and if an NTP server is running the equipment will
start synching as soon as a first communication from the server
is received.
Ethernet
Switch
NTPNTPNTP
NTP Server
Fig. 3.10 Synchronizing multiple interrogators
A hybrid measurement system is a system composed by differ
ent equipment types and technologies that can be operated with
different sampling rates. Taking the example of HBK families a
hybrid system could be a combination of Interrogators with
QuantumX.
Single interrogator
Multiple
interrogators
Hybrid

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OPERATION
18
Ethernet
Switch
NTPNTPNTP
NTP Server
Fig. 3.11 Synchronizing interrogators with conventional technology
Synchronization is again of extreme importance in such systems. When an NTP server is
running the Interrogator will start synching as soon as a first communication from the
server is received.
For details on the other equipment please refer to their respective user manuals.
Synchronization process
Each interrogator synchronizes its internal clock with the NTP server. Upon starting, all
devices and the NTP server need some settling time to achieve the best synchronism
possible.
The following features for NTP synchronization are available:
Number of devices to be
synchronized
Unlimited
Synchronization accuracy 100 μs to 10 ms
Synchronization settling
time
Up to 30 min during first start, up to 2 min during restart
Synchronization master External SyncMaster, e.g. PC
For a good synchronization, the dedicated NTP server should run continuously. The accu
racy is described by the two values:
SOffset: average deviation from time server
SJitter: typical variation range of the offset value
The clock synchronization is classified using the following offset intervals:
S<500 μs: excellent
S<1 ms: very good

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OPERATION
S<2 ms: good
S<5 ms: acceptable
S<10ms: poor
S>10ms: not acceptable
A successful NTP Sync is achieved if the offset between the internal clock of the device
and the NTP server is below 5ms.
The quality of the NTP synchronization can be queried using the SCPI commands (please
refer to section “Synchronization” on page 53 for further details).
3.6.4 Operation
The FS22 - Industrial BraggMETER DI interrogator can be fully controlled using standard
SCPI syntax commands (for a complete command list, please refer to section 5.1
“Communication Protocol Syntax” on page 40).
All valid answers to sent commands, start with :ACK.
Whenever there is a misspell or a wrong command sent, an error message will be
returned:
:NACK:INVALID COMMAND
That means that the command does not exist. Check if the spelling is correct.
:NACK: COMMAND NOT ACCEPTED AT CURRENT STATUS
It is not possible to execute the command sent at the current status.
Ask the current status of the interrogator (:STAT?) and confirm with scheme from
Fig. 3.12 to see how to change it.
:NACK: '?' MUST BE THE LAST CHARACTER
The sent command should have a '?' at the end of the command string.
Important
Before using the provided LabVIEW(TM) examples on a PC, make sure the Regional and
Language options (in standards and formats) are defined as dot for decimal symbol,
comma for digit grouping symbol and dash for date separation.
Operational States
The FS22 - Industrial BraggMETER DI interrogator has five operational states:
The error state corresponds to a malfunction of the optoelec
tronic module of the FS22 - Industrial BraggMETER DI interroga
tor. The system can recover from this state by resetting.
0 error

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OPERATION
20
In the ready state, the FS22 - Industrial BraggMETER DI inter
rogator is ready to start acquisition.
The free acquisition state enables the FS22 - Industrial BraggME
TER DI interrogator to perform single measurements on a speci
fied optical channel. The FS22 - Industrial BraggMETER DI inter
rogator can be configured in terms of gain, threshold and
sampling rate. The corresponding configuration can be stored
for future reference.
The continuous acquisition state allows continuous wavelength
acquisition over all optical channels at 50, 100, 200, 500 or 1000
S/s. The FS22 - Industrial BraggMETER DI interrogator can also
display continuous OSA trace acquisition every second. For that
the sampling rate of the interrogator shall be set to 50 S/s.
The FS22 - Industrial BraggMETER DI interrogator starts on the
warming-up state that enables the settling of the operation
parameters and recall of the acquisition configuration.
Fig. 3.12 Operational States and main commands
1 ready
2 free acquisition
3 continuous acqui
sition
5 warming-up