SICK GM901 User manual

OPERATING INSTRUCTIONS
GM901
Carbon Monoxide Measuring Device
Titelseite
Installation
Operation
Maintenance

2GM901 • Operating Instructions • 8008250 • © SICK AG
Document Information
Document Identification
Title: GM901 Operating Instructions
Order-no.: 8008250
Model: cross duct
Issue: 2012-10
Version: 2.0
Descriped product
Product name: GM901
Manufacturer
SICK AG
Erwin-Sick-Str. 1 · 79183 Waldkirch · Germany
Phone: [phone]
Fax: [phone]
E-Mail: [email protected]
Trademarks
IBM is a trademark of the International Business Machine
Corporation.
MS-DOS is a trademark of the Microsoft Corporation.
Windows is a trademark of the Microsoft Corporation.
Other product names used in this document may also be trade-
marks and are only used for identification purposes.
Original Documents
The English edition 8008250 of this document is an original docu-
ment of SICK AG.
SICK AG assumes no liability for the correctness of an unauthor-
ized translation.
Please contact the manufacturer or your local representative in
case of doubt.
Legal information
Subject to change without notice.
©SICK AG. All rights reserved.

Operation Manual GM901
CO Measuring Device
Contents
808250/2012-10 ©SICK AG • Germany · All rights reserved 3
1 Safety Information...........................................................................................................6
1.1 Intended Use ....................................................................................................................6
1.2 Qualified Personnel..........................................................................................................6
1.3 Correct Handling...............................................................................................................6
1.4 Safety Devices and Measures .........................................................................................7
1.5 Responding to Purge-Air Failure......................................................................................7
1.6 Environmental Information..............................................................................................7
2 GM901 Overview..............................................................................................................8
2.1 Components Overview .....................................................................................................8
2.2 Standard Scope of Supply ...............................................................................................9
2.3 Optional Accessories........................................................................................................9
2.3.1 Evaluation unit .................................................................................................................... 9
2.3.2 PROFIBUS interface .......................................................................................................... 10
3 Mounting ........................................................................................................................ 11
3.1 Fitting of the Flange with Tube ..................................................................................... 11
3.1.1 Mounting the Standard Flange ........................................................................................ 12
3.1.2 Defining the Measuring Path ........................................................................................... 13
3.1.3 Variant Installation for Brick Ducts..................................................................................13
3.1.4 Variant Installation for Thin-Walled Ducts....................................................................... 14
3.2 Mounting the Purge air unit.......................................................................................... 15
3.3 Mounting the CO Measuring device GM901 ............................................................... 16
3.3.1 Aligning the optical axis ................................................................................................... 17
3.3.2 Mounting the sender and receiver .................................................................................. 18
3.3.3 Installing the weatherproof cover for the GM901.......................................................... 19
3.4 Mounting the Evaluation unit ....................................................................................... 20
4 Electrical Installation.................................................................................................... 21
4.1 Planning Guide for Electrical Installation..................................................................... 21
4.2 Electric Wiring for Standard Version ............................................................................ 22
4.3 Electrical Wiring for Evaluation unit ............................................................................. 23
4.4 Electrical Connections for the Purge air motor ........................................................... 24
4.5 Power Supply and Signal Cables for the Evaluation Unit ........................................... 26
4.6 Electrical wiring of the Evaluation Unit – PROFIBUS................................................... 27
4.7 Electrical Connections inside the Connection Unit ..................................................... 28
5 Commissioning.............................................................................................................. 29
5.1 Requirements for Commissioning................................................................................ 29
5.2 Control elements of the Evaluation unit ...................................................................... 29
5.2.1 Function keys and Sub menus ........................................................................................30
5.3 Zero-point Adjustment .................................................................................................. 31
5.3.1 Conditions for the zero-point adjustment ....................................................................... 31
5.3.2 Establishing the zero-point comparison path ................................................................. 31
5.3.3 Start the zero-point and check-point adjustment........................................................... 32
5.3.4 Mounting the GM901 CO Monitor on the duct............................................................... 32

GM901 Operation Manual
CO Measuring Device
Contents
4©SICK AG • Germany · All rights reserved 808250/2012-10
5.3.5 Test cells ........................................................................................................................... 32
5.3.6 Determining the Test Concentration ............................................................................... 33
5.3.7 Performing the SPAN Test................................................................................................ 33
5.4 Default Parameter Settings...........................................................................................34
6 Setting the Parameters ................................................................................................ 35
6.1 Diagnosis........................................................................................................................35
6.2 Setting the Parameters ................................................................................................37
6.2.1 Settings.............................................................................................................................. 37
6.2.2 Device Data ....................................................................................................................... 50
6.2.3 Service ............................................................................................................................... 51
6.3 Calibration ......................................................................................................................52
6.3.1 Zero-Point Adjustment ...................................................................................................... 52
6.3.2 SPAN-Test.......................................................................................................................... 53
6.4 Maintenance ..................................................................................................................54
6.4.1 Reset System .................................................................................................................... 54
6.4.2 Maintenance Mode........................................................................................................... 55
6.4.3 Reset Parameter ............................................................................................................... 57
6.5 Measuring Mode ............................................................................................................58
6.6 Connection of the PROFIBUS for Commissioning........................................................58
7 Decommissioning of the GM901................................................................................ 59
7.1 Dismantling the Sender and the Receiver ...................................................................59
7.2 Decommissioning ..........................................................................................................59
8 Technical Data ............................................................................................................... 61
8.1 Overview .........................................................................................................................61
8.2 Sender and Receiver of the GM901-5 ........................................................................61
8.3 Evaluation Unit...............................................................................................................61
8.4 Dimensioned Drawing – Sender ...................................................................................62
8.5 Dimensioned Drawing – Evaluation Unit......................................................................63
9 Warnings and Malfunctions......................................................................................... 64
9.1 Warnings.........................................................................................................................64
9.2 Malfunctions ..................................................................................................................65
9.3 Further Troubleshooting Tips ........................................................................................66
9.3.1 Troubleshooting on the Sender ....................................................................................... 66
9.3.2 Troubleshooting on the Receiver..................................................................................... 67
9.3.3 Troubleshooting on the Evaluation Unit .......................................................................... 68
9.3.4 No Response from Device................................................................................................68
9.3.5 Communication Error Between the Evaluation Unit and Receiver................................ 69
9.3.6 Sensor Values ................................................................................................................... 69
9.3.7 Remote Diagnosis............................................................................................................. 69
10 Spare Parts, Accessories.............................................................................................. 71
10.1 Spare Parts.....................................................................................................................71
10.2 Options, Accessories......................................................................................................71

Operating Instructions GM901
Laser Gas Analyzer
8008250/2012-10 ©SICK AG • Germany · All rights reserved 5
Subject to change without notice
Purpose of this document
Purpose of This Document
This instruction manual describes the standard scope of supply of the GM901 CO Measur-
ing System, as well as the standard range of accessories available. The purpose of this doc-
ument is to explain the functioning of the GM901 and describe the procedures for
mounting, installing, starting up, and operating the device.
Note Make sure to read these instructions carefully before carrying out any work on the device.
All warnings must be observed at all times!
Symbols
The following symbols are used in this manual to identify important safety information for
the user. The symbols mark sections of the text where this information is required. The safe-
ty information and warnings, in particular, must be observed at all times.
DANGER
Warning:
Indicates potential danger to personnel, particularly from electrical equipment.
▸ Always read the warnings carefully and observe them at all times.
DANGER
Danger
Provides information for preventing (fatal) injury.
▸ Always read this information carefully and observe it at all times.
ATTENTION
Attention
Indicates risks to system components or possible functional impairments.
▸ Always read this information carefully and observe it at all times.
Note Indicates additional information on the system or system components, as well as useful
tips.

GM901 Operating Instructions
Laser Gas Analyzer
Safety Information
6©SICK AG • Germany · All rights reserved 8008250/2012-10
Subject to change without notice
1 Safety Information
1.1 Intended Use
The GM901 CO Analyzer must only be used to monitor CO concentrations in gas ducts. If the
device is used for any other purpose or changed in any way, also during installation and as-
sembly, any warranty claims vis-à-vis SICK AG will be rendered invalid.
The person(s) responsible for safety must ensure that all potential risks of danger are rec-
ognized in good time and avoided.
1.2 Qualified Personnel
All planning, mounting, installation, commissioning, maintenance, and repair work must be
carried out by adequately trained personnel only and checked by experts.
Personnel responsible for maintaining health and safety standards need to make sure that:
•Only qualified personnel are to carry out any safety-related operations
•All work on the device components is carried out by qualified personnel only. These per-
sons must be qualified by virtue of their expertise (training, education, experience) or un-
derstanding of the relevant standards, specifications, accident prevention regulations,
and properties of the system. It is crucial that these persons are able to identify and avoid
potential hazards in good time
•They always have access to the operating instructions supplied with the device as well as
the associated system documentation when carrying out work and observe this docu-
mentation to avoid hazards and damage.
1.3 Correct Handling
You must make sure that:
•The system is used in accordance with the technical data and specifications regarding
usage, assembly, connection, ambient, and operating conditions (see order
documentation, user information, rating plates, etc.) and the documentation supplied.
•Users act in accordance with the local, system-specific conditions and with due
consideration paid to operational hazards and specifications.
•All value-maintenance measures (i.e. for transportation, storage, maintenance, and
inspection) are observed.

Operating Instructions GM901
Laser Gas Analyzer
Safety Information
8008250/2012-10 ©SICK AG • Germany · All rights reserved 7
Subject to change without notice
1.4 Safety Devices and Measures
Preventive measures for improving operational safety
Incorrect use and insufficient maintencace of the CO measuring device GM901 can cause
serious personal injury or damage.
▸ Please observe safety regulations at all times to prevent accidents.
If the GM901 is used as a sensor in conjunction with a control system, the operator must
make sure that a failure or malfunction cannot lead to operating conditions that cause dam-
age or lead to other hazardous operating conditions.
Danger from electrical equipment
The GM901 system components are designed for use in industrial power installations.
Please observe all relevant norms and regulations at all times.
▸ When working on Power supply connections or voltage carrying parts switch feeder ca-
bles to zero potential.
Protective measures against dangers caused by gases
▸ Always use protective clothing and a protective mask when working at installations car-
rying hot and/or agressive gases or high dust contents.
▸ Never try to open the housing or switch off the purge air supply whilst there are high pres-
sure inside the duct without having the protective measures in place.
Preventive measures to treat malfunctions
The operator has to ensure that
•competent maintenance personnel can be contacted within an appropiate time span.
•the maintenance personnel is suffciently trained to react appropiately to malfunctions
of the GM901 and associated operating procedure.
•suitable protective equipment, tools and operating resources are always available .
•error histories are analyzed by qualified personnel, the source of malfunctions are re-
moved and the operating process optimized in such a way as to prevent further malfunc-
tions.
1.5 Responding to Purge-Air Failure
The purge air unit (optional) is used to cool the sender and receiver units, and protects the
optical boundary areas from dirt, corrosive flue gases, and high flue-gas temperatures.
1.6 Environmental Information
The GM901 was designed in accordance with ecological criteria. The modules can be easily
separated, sorted, and recycled. All of the materials used in the GM901 are groundwater-
neutral.

GM901 Operating Instructions
Laser Gas Analyzer
GM901 Overview
8©SICK AG • Germany · All rights reserved 8008250/2012-10
Subject to change without notice
2 GM901 Overview
2.1 Components Overview
Fig. 1 Components overview .4 6WLYH[PVU:LY]PJL>HYUPUN4HSM\UJ[PVUPurge air
attachment
Evaluation unit
SenderReceiver
Connection unit
(optional)
Purge air unit
(optional)
Temperature
sensor
(optional)
Cable 15 m (49 ft; CAN bus)
Cable 2 m (6.6 ft; CAN-Bus)
PROFIBUS (when available)
1 Analog input
1 Analog ouput
Power supply: 115/230 V AC
Cable max. 1000 m
(3,280 ft; CAN bus)

Operating Instructions GM901
Laser Gas Analyzer
GM901 Overview
8008250/2012-10 ©SICK AG • Germany · All rights reserved 9
Subject to change without notice
2.2 Standard Scope of Supply
Fig. 2 CO Measuring Device GM901
The basic configuration of the GM901 consists of:
•Sender
•Receiver
•Evaluation unit with connecting cable (2 m/6.6 ft)
•Cable for connecting the sender and receiver units (15 m/50 ft)
2.3 Optional Accessories
•Connection unit for distances larger than 17 m (55.8 ft) up to 1000 m (3.280 ft)
•Purge-air unit for protecting the optical boundary areas on the sender and receiver units
•Flanges
•Optical adjustment device
•CO test cells with bracket (span test)
•Alignment bracket for establishing a zero-point reference path
•Blind flanges
•PT 100 temperature sensor
2.3.1 Evaluation unit
The evaluation unit serves as user interface. Its functions are the processing and the output
of data as well as control and monitoring of the operation. The evaluation unit can be fitted
either in close proximity to the sender or up to ca. 1000 m (3,281 ft) distance from the mea-
suring point, i.e. in the control room of the industrial plant.
Receiver
Sender
Evaluation unit

GM901 Operating Instructions
Laser Gas Analyzer
GM901 Overview
10 ©SICK AG • Germany · All rights reserved 8008250/2012-10
Subject to change without notice
Display- and control elements of the evaluation unit
The evalation unit serves to display, input and adjust parameters as well as a having the
control function for the system. The control panel with display, the status signals and the
key pads are easily accessible by opening the swing door of the housing.
Fig. 3 Display- and control elements of the evaluation unit
2.3.2 PROFIBUS interface (when available)
The PROFIBUS connects process management level (i.e. host system, host, control room) to
the measuring device. With the help of the PROFIBUS measuring values, status and error
signals are being queried . The GM901 supports the PROFIBUS-DP-V1 with data transfer
rates of 9.6 to 187 kBit/s. A device master data file (GSD) to specify the interface is avail-
able for the evaluation unit. It contains information about device manufacturer, identifica-
tion number data transfer rates and so on . This file may be used as profile (Profile-GSD) for
project planning purposes of the PROFIBUS.
Each participant of the bussystem is identified by a 7-bit-device adress (1 – 127) which is
entered into the evaluation unit when setting the parameters. Of adresses 1 – 127, 126
and 127 are reserved and cannot be used.
Note A terminator has to be fitted onto the end device.
Available measuring data
The measuring values provided by the GM901, serving as pathway to the process ma-
nagement level are defined in the device master data file (GSD). You find the measuring
sizes and their corresponding measuring unit in the table below:
GM 901
Evaluation Unit
CO
ppm
1276
Operation
Service
Warning
Malfunction
GM 901
Evaluation Unit
CO
ppm
1276
Ref. conditions
Hum: wet
Enter meas
diag par cal maint
Measuring
Measuring
Enter meas
maintcalpardiag
Operation
Service
Warning
Malfunction
Graphic display for mea-
suring values and menu
control
Status-LEDs for operational and
error messages
Keys for menu guid-
ance and data input
Menu keypad
Measuring size CO
CO ppm
CO mg/m3 norm. value
CO mg/m3 actual value

Operating Instructions GM901
Laser Gas Analyzer
Mounting
8008250/2012-10 ©SICK AG • Germany · All rights reserved 11
Subject to change without notice
3 Mounting
3.1 Fitting of the Flange with Tube
Important notes for installing the flanges with tube
•During installation, the axes of the flanges with tube must be carefully aligned with each
other. The angular deviation must not exceed 1°. Bracings or other suitable supports
must be used for thin-walled steel ducts .
•With easily accessible measuring paths of up to 2 m (6.5 ft), the flanges with tube can be
aligned using a suitable auxiliary tube (for a standard flange, diameter 70 mm (2.3 ft)).
Fig. 4 Auxiliary tube for aligning the flanges in measuring paths of up to 2 m (6.5 ft)
With longer or less easily accessible meas. paths, an optical alignment device must be
used.
Fig. 5 Recommendation for mounting the flange
(1.2”)
30
(1.4”)
35
(∅3”)
∅76
(18.5”)
470
470
(18.5”)
(2”)
50
Mounting
for mounting position
Steel tube 50 x 5
DIN 2391
Flange 60 x 8 x 60
DIN 174

GM901 Operating Instructions
Laser Gas Analyzer
Mounting
12 ©SICK AG • Germany · All rights reserved 8008250/2012-10
Subject to change without notice
3.1.1 Mounting the Standard Flange
ATTENTION
Potential damage when opening the duct!
Make sure that parts do not fall into the duct.
▸ Mark the mounting location for the flange with tube and flame-cut a hole.
▸ The glands for the flange with tube should project approx. 30 mm (1 ft) into the duct. Ad-
just the tube glands if necessary.
▸ Tack the flanges with tube to the duct, making sure that you note the marking for the
mounting position ("top"), the precise flange-to-flange measuring path, and the dimen-
sions.
Fig. 6 Flange wih pipe, standard version
▸ To align the flange at the installation location, use a tube or alignment device
Fig. 7 Aligning of flange by using an optical alignment device
▸ When using the alignment device, attach the light source and receiver unit as shown in
Fig.7
1. Align flange 1 until the light spot from the light source is at the center of the alignment
target on the receiver unit. Tack-weld flange 1.
Standard flange with tube
L
mm
Best.-Nr. Mat.
130 2 017 845 ST37
240 2 017 847 ST37
130 2 017 846 1.4571
240 2 017 848 1.4571
30 (1.2”)
∅76 (1.2”)
Marking of
the mounting position
Arrangement of
threaded pins
moved by 45°¨
(drawn)
Light source
Alignment tube

Operating Instructions GM901
Laser Gas Analyzer
Mounting
8008250/2012-10 ©SICK AG • Germany · All rights reserved 13
Subject to change without notice
2. Attach the alignment device the other way round.
1. Align and tack-weld flange 2.
When welding and aligning the device, make sure that the flange-to-flange measuring path
is observed exactly in case a zero-point comparison path has already been commissioned
or supplied. The zero-point measuring path will otherwise have to be adjusted (see Chapter
5.3.2, page 33).
3.1.2 Defining the Measuring Path
Fig. 8 Measuring path from flange to flange
The flange with tube must be aligned exactly to 1°.
▸ If necessary, correct the alignment (peripheral weld).
▸ Once you have finished installing the flanges, measure and record the exact distance
from flange to flange as well as the active measuring path. Keep the measurements for
commissioning.
3.1.3 Variant Installation for Brick Ducts
For brick ducts, the customer must attach suitable armature plates to the duct wall and
weld the flanges with tube onto them
Flange-to-flange measuring path
Active measur-
ing path

GM901 Operating Instructions
Laser Gas Analyzer
Mounting
14 ©SICK AG • Germany · All rights reserved 8008250/2012-10
Subject to change without notice
Fig. 9 Flange with tube for brick ducts
3.1.4 Variant Installation for Thin-Walled Ducts
Thin-walled ducts or mounting locations that are subject to vibration must be reinforced by
the customer by welding on reinforcing junction plates.
Fig. 10 Example of reinforced mounting location
76 (3”)
L
30
(1.2”)
Marking
for the mounting position
Arrangement of
moved by 45°
(drawn)
threaded pins
xxxx
Marking of
the mounting position
Junction plates
(attached by customer)
The rear of the
threaded pins is used for
securing the optional
weatherproof cover

Operating Instructions GM901
Laser Gas Analyzer
Mounting
8008250/2012-10 ©SICK AG • Germany · All rights reserved 15
Subject to change without notice
3.2 Mounting the Purge air unit
Note For mounting of the purge air unit, see mounting proposals; see Fig. 5, Seite 11
Fig. 11 Mounting the purge air unit SLV 4
▸ Construct and mount fixings in accordance with the mounting proposals (Fig. 5, Seite 11)
▸ Affix Baseplate to purge air unit wih 4 bolts
▸ Prepare the hose length:
– Cut off purge air hoses at same length and fix with a hose clamp to the Y-piece of the
purge air unit.
▸ Seal hose ends if purge air unit is not used for a longer time span.
With optional Weatherproof cover
The Weatherproof cover consists of a cover and a set of locks .
▸ Secure lock angle with bolts onto the basis plate of the purge air unit.
▸ Mount the cover
▸ Insert the locking bolts positionend at each side in to their counter piece, turn until it has
snapped in.

Mounting
bracket
Y-piece to connect purge
air hoses to optical unit
Mounting hole
Baseplate
Weatherproof cover
Lock angle
Mounting of he purge air
pipes

GM901 Operating Instructions
Laser Gas Analyzer
Mounting
16 ©SICK AG • Germany · All rights reserved 8008250/2012-10
Subject to change without notice
3.3 Mounting the CO Measuring device GM901
To ensure that the GM901 is installed and started correctly, the unit should be adjusted
first. A CO-free environment is required for this zero-point adjustment. If the installation is
not in operation and the duct is free of CO, the adjustment can also be carried out at the
measuring point. See Chapter 5.3.3, page 32
Fig. 12 Mounting the purge-air attachment to the flange with tube
1. Purge air unit is mounted, see Chapter 3.2, page 15
2. Connect the purge-air hoses to the glands on the purge-air attachments and secure
them with hose clamps.
3. Switch on the power supply to the purge-air unit, see, see Chapter 4.4, page 24
4. Check whether purge air is supplied at the purge-air attachments of the sender and re-
ceiver.
5. Pull the rubber tape onto the flange with tube.
6. Place 4 disk spring pairs on each of the 3 screw bolts.
7. Mount the purge-air attachments for the sender and receiver on the flange.
8. Place the spherical washers on the 3 screw bolts.
9. Mount and tighten the self-locking nuts (w/s 17) so that there is a gap of 8.5 … 10 mm
(0.3 … 0.4 in) between the two flange plates.
10. Pull the rubber tape over this gap.
Flange with tube
Purge Air attachment
Disk springs
Rubber tape
Self-locking nut with
spherical washer
Purge-air connec-
tion

Operating Instructions GM901
Laser Gas Analyzer
Mounting
8008250/2012-10 ©SICK AG • Germany · All rights reserved 17
Subject to change without notice
3.3.1 Aligning the optical axis
An optional alignment device with a lamp and alignment tube is available for generally align-
ing the purge-air attachments.
Fig. 13 Alignment device (optional)
▸ Secure the lamp to the sender using the clamps on the purge-air attachment.
Fig. 14 Optical alignment device (lamp)
▸ Secure the adjustment tube to the receiver using the clamps on the purge-air attach-
ment.
Fig. 15 Aligning the optical axis between the sender and receiver
Lamp
Alignment
tube
Lamp
Clamp
TOP
TOP
x
y
X/Y adjustment
Alignment tube
Clamp
Ground glass
screen
Nuts for adjusting the optical
axis

GM901 Operating Instructions
Laser Gas Analyzer
Mounting
18 ©SICK AG • Germany · All rights reserved 8008250/2012-10
Subject to change without notice
At the receiver
▸ Tighten the 2 nuts for the horizontal adjustment (X) and vertical adjustment (Y) so that
the light spot appears in the center of the adjustment tube window.
▸ Swap the optical alignment device on the purge-air attachments on the sender or receiv-
er side.
At the sender
▸ Tighten the 2 nuts for the horizontal adjustment (X) and vertical adjustment (Y) so that
the light spot appears in the center of the adjustment tube window.
▸ Check the alignment of the purge-air attachments again.
3.3.2 Mounting the sender and receiver
Fig. 16 Mounting the GM901
▸ Remove the alignment device and secure the sender and receiver into position using the
clamps
Incorrect
Correct
Alignment on the screen
GM901
sender or receiver
Purge-air
attachment
Purge-air connection

Operating Instructions GM901
Laser Gas Analyzer
Mounting
8008250/2012-10 ©SICK AG • Germany · All rights reserved 19
Subject to change without notice
3.3.3 Installing the weatherproof cover for the GM901
The optional weatherproof cover consists of a baseplate (with lock bracket) and a cover.
Fig. 17 Installing the weatherproof cover for the GM901
1. Mount the baseplate sideways on the flange with tube and secure it to the surface of
the flange plate on the duct (purge-air attachment) using the threaded pins provided.
2. Mount the cover on the baseplate from above; to do so, pull the walls of the cover
outwards slightly.
3. Insert the side lock bolts in the counterparts, and rotate them until they latch into place
Step 2
Flange plate
(purge-air attach-
ment)
Basis plate Cover
Step 1
Step 3
Lock bracket

GM901 Operating Instructions
Laser Gas Analyzer
Mounting
20 ©SICK AG • Germany · All rights reserved 8008250/2012-10
Subject to change without notice
3.4 Mounting the Evaluation unit
Note Ensure unobstructed access. Especially the swing-door of the mounted evaluation unit
should be able to be openend without any hinderances.
▸ Mount the evaluation unit on a level surface that is protected and easily accessible.
▸ Drill holes 7.2 mm (0.28 in; for M8) into the mounting point according to drill plan.
▸ Secure the evaluation unit at with suitable bolts at 4 fastening brackets.
Fig. 18 Mounting the evaluation unit
 

4 Mounting drill holes
7.2 mm (0.28 in)
Mounting surface
Fastening brackets