Teledyne TIENet 360 LaserFlow Ex Operating instructions

TIENet®360 LaserFlow Ex®
Velocity Sensor
Installation and Operation Guide
Part #69-4363-085
Copyright © 2019. All rights reserved, Teledyne ISCO
Released March 2019

Foreword
This instruction manual is designed to help you gain a thorough understanding of the operation of
the equipment. Teledyne ISCO recommends that you read this manual completely before placing
the equipment in service.
Although Teledyne ISCO designs reliability into all equipment, there is always the possibility of a
malfunction. This manual may help in diagnosing and repairing the malfunction.
If a problem persists, call or e-mail Teledyne ISCO technical support for assistance. Simple
difficulties can often be diagnosed over the phone. For faster service, please have your serial
number ready.
If it is necessary to return the equipment to the factory for service, please follow the shipping
instructions provided by technical support, including the use of the Return Material
Authorization (RMA) specified. Be sure to include a note describing the malfunction. This will
aid in the prompt repair and return of the equipment.
Teledyne ISCO welcomes suggestions that would improve the information presented in this
manual or enhance the operation of the equipment itself.
Teledyne ISCO is continually improving its products and reserves the right to change
product specifications, replacement parts, schematics, and instructions without notice.
Contact Information
Customer Service
Phone: [phone] (USA, Canada, Mexico)
[phone] (Outside North America)
Fax: [phone]
Email: [email protected]
Technical Support
Phone: Toll Free [phone] (Samplers and flowmeters)
Email: [email protected]
Return equipment to: 4700 Superior Street, Lincoln, NE 68504-1398
Other Correspondence
Mail to: P.O. Box 82531, Lincoln, NE 68501-2531
Email: [email protected]
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.

TIENet™ 360 LaserFlow Ex ™ Velocity Sensor
Safety
v
TIENet™ 360 LaserFlow Ex ™ Velocity Sensor
Safety
General Warnings
WARNING
Caution: Use of controls or adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.
Wavelength: 655 nm
Maximum Power: 5 mW
Before installing, operating, or maintaining this equipment, it is
imperative that all hazards and preventive measures are fully
understood. While specific hazards may vary according to
location and application, take heed of the following general
warnings:
WARNING
Avoid hazardous practices! If you use this instrument in
any way not specified in this manual, the protection
provided by the instrument may be impaired.

TIENet™ 360 LaserFlow Ex ™ Velocity Sensor
Safety
vi
DANGER
The LaserFlow Ex MUST be installed in
accordance with control drawing, in Figure 2-1
thru Figure 2-3 in this manual, and in accordance
with the requirements of the authority that has
jurisdiction for the installation of equipment in
hazardous areas at your specific installation site.
The certified control drawing details the only
approved method of installing the LaserFlow Ex.
Where specific ISCO part numbers appear, they
represent the only approved equipment certified
to be used with the LaserFlow Ex. Any equipment
substitutions or installations not specifically
detailed on the control drawing will automatically
void the intrinsically safe certification of the
LaserFlow Ex and could result in fire or
explosion!
Hazard Severity Levels This manual applies Hazard Severity Levels to the safety alerts,
These three levels are described in the sample alerts below.
CAUTION
Cautions identify a potential hazard, which if not avoided, may
result in minor or moderate injury. This category can also warn
you of unsafe practices, or conditions that may cause property
damage.
WARNING
Warnings identify a potentially hazardous condition, which
if not avoided, could result in death or serious injury.
DANGER
DANGER – limited to the most extreme situations
to identify an imminent hazard, which if not
avoided, will result in death or serious injury.

TIENet™ 360 LaserFlow Ex ™ Velocity Sensor
Safety
vii
Hazard Symbols The equipment and this manual use symbols used to warn of
hazards. The symbols are explained below.
Hazard Symbols
Warnings and Cautions
The exclamation point within the triangle is a warning sign alerting you of
important instructions in the instrument’s technical reference manual.
The lightning flash and arrowhead within the triangle is a warning sign alert-
ing you of “dangerous voltage” inside the product.
Symboles de sécurité
Ce symbole signale l’existence d’instructions importantes relatives au
produit dans ce manuel.
Ce symbole signale la présence d’un danger d’électocution.
Warnungen und Vorsichtshinweise
Das Ausrufezeichen in Dreieck ist ein Warnzeichen, das Sie darauf
aufmerksam macht, daß wichtige Anleitungen zu diesem Handbuch
gehören.
Der gepfeilte Blitz im Dreieck ist ein Warnzeichen, das Sei vor “gefährlichen
Spannungen” im Inneren des Produkts warnt.
Advertencias y Precauciones
Esta señal le advierte sobre la importancia de las instrucciones del manual
que acompañan a este producto.
Esta señal alerta sobre la presencia de alto voltaje en el interior del
producto.

TIENet™ 360 LaserFlow Ex ™ Velocity Sensor
Safety
viii

vii
TIENet™ 360 LaserFlow Ex™
Velocity Sensor
Table of Contents
Section 1 Introduction
1.1 LaserFlow Ex.......................................................1-1
1.2 Design of
LaserFlow Ex ......................................................1-2
1.2.1 Measurement Technology .......................................1-2
1.2.2 Cabling ......................................................1-2
1.3 Operation ..........................................................1-2
1.4 Technical Specifications ..............................................1-3
1.5 Accessories .........................................................1-5
1.5.1 Ordering Information ..........................................1-5
1.6 Unpacking Instructions ..............................................1-6
1.6.1 Protective Window Cap .........................................1-6
Section 2 Preparation and Installation
2.1 Safety .............................................................2-1
2.1.1 Site Conditions ................................................2-1
2.1.2 Installation in Hazardous Locations ...............................2-2
2.1.3 Important Information Regarding “X” Marking .....................2-2
2.1.4 Electrical Requirements ........................................2-3
2.1.5 Ambient Environment ..........................................2-3
2.2 Sensor Installation Considerations .....................................2-6
2.2.1 Ultrasonic Beam Angle .........................................2-6
2.2.2 High Water Levels .............................................2-6
2.2.3 Submersion and Fouling ........................................2-6
2.2.4 Humidity ....................................................2-7
2.2.5 Surface ......................................................2-7
2.2.6 Temperature ..................................................2-7
2.2.7 Waves .......................................................2-7
2.2.8 Wind ........................................................2-7
2.3 Installation Checklist ................................................2-7
2.4 Connecting the Cable ................................................2-7
2.4.1 Cable Connection: TIENet Barrier ................................2-7
2.4.2 Cable Connection: Signature Flowmeter ...........................2-8
2.4.3 Remote Ultrasonic Cable Connection:
310 Ultrasonic Sensor .........................................2-13
2.5 Sensor Installation Tools and Requirements.............................2-14
2.5.1 Tools Required ...............................................2-14
2.5.2 Sensor and Mounting Equipment Dimensions .....................2-14
2.5.3 Sensor Positioning and Requirements ............................2-16
2.6 Wall Mounting Kit..................................................2-18
2.6.1 Wall Mount Installation .......................................2-19
2.7 Optional Sunshade .................................................2-23
2.8 Remote TIENet™ Model 310 Ultrasonic Level Sensor .....................2-24

TIENet™ 360 LaserFlow Ex™ Velocity Sensor
Table of Contents
viii
Section 3 Setup with Signature® flowmeter
3.1 Configuring the System ..............................................3-1
3.1.1 Updating the Device List ........................................3-1
3.2 Measurement Setup .................................................3-4
3.2.1 360 Level ....................................................3-5
3.2.2 360 Velocity ..................................................3-5
3.2.3 LaserFlow Ex Velocity Advanced Settings ..........................3-5
3.3 360 Velocity Grid....................................................3-9
3.4 Sensor Positioning and Adjustment ....................................3-10
3.4.1 Centering the LaserFlow Ex Sensor ..............................3-10
3.4.2 Laser Velocity Measurement Point Selection .......................3-10
3.4.3 Ultrasonic Level Adjustment ...................................3-11
3.5 Contact Teledyne ISCO..............................................3-12
Section 4 Setup with 2160 LaserFlow Module
4.1 Activating Connected Sensors .........................................4-1
4.2 Measurement Display and Settings .....................................4-3
4.2.1 360 Level ....................................................4-5
4.2.2 360 Velocity ..................................................4-7
4.2.3 Advanced Settings .............................................4-8
4.3 Sensor Positioning and Adjustment ....................................4-14
4.3.1 Centering the LaserFlow Ex Sensor ..............................4-14
4.3.2 Laser Velocity Measurement Point Selection .......................4-15
Section 5 Maintenance and Optional Kits
5.1 Maintenance .......................................................5-1
5.2 Firmware Updates ..................................................5-2
5.2.1 With Signature flowmeter .......................................5-2
5.2.2 With 2160 LaserFlow Module ....................................5-2
5.3 Cleaning the Sensor Housing ..........................................5-2
5.4 Accessing the LaserFlow Ex’s Nose Piece ................................5-2
5.4.1 Removing the Nose Piece ........................................5-3
5.4.2 Replacing the Nose Piece ........................................5-4
5.5 Velocity Readings and the Laser Window ................................5-5
5.6 Cleaning the Laser Window ...........................................5-5
5.7 Installing the Remote TIENet™ 310 Ultrasonic Level Sensor................5-6
Appendix A Replacement Parts
A.1 Replacement Parts Diagrams and Listings...............................A-1
A.2 LaserFlow Ex Sensor ................................................A-2
A.3 Wall Mounting Hardware ............................................A-4
A.4 Replacement Sensors ................................................A-6
A.5 Sensor Accessories ..................................................A-6
Appendix B Installation Checklist
B.1 Introduction .......................................................B-1
B.2 Equipment and Recommended Tools....................................B-2
B.3 Site Information ....................................................B-2
B.4 Recommended Essential Parameters ...................................B-5
B.5 Site Conditions .....................................................B-5
B.6 Sensor Positioning ..................................................B-8

TIENet™ 360 LaserFlow Ex™ Velocity Sensor
Table of Contents
ix
Appendix C Velocity Error Codes
C.1 Introduction .......................................................C-1
C.2 Importing Data Dump (.ddp) Files
(Signature Only) ....................................................C-1
C.3 Viewing Velocity Error Codes in Flowlink ...............................C-3
Appendix D Material Safety Data Sheets
List of Figures
1-1 Basic LaserFlow Ex system (showing both AC and battery-powered options) . . . 1-1
1-2 Remove protective window cap before installation ........................1-6
2-1 Wiring diagram ....................................................2-3
2-2 LaserFlow Ex control drawing .........................................2-4
2-3 LaserFlow Ex control drawing .........................................2-5
2-4 Ultrasonic level sensor beam angle .....................................2-6
2-5 Signature connected with the TIENet Barrier ............................2-8
2-6 TIENet Device terminal strips ........................................2-9
2-7 Installing cable with a cord-grip fitting .................................2-9
2-8 TIENet Device terminal connections ..................................2-10
2-9 Attach wired terminal strip to case board socket .........................2-11
2-10 Insert the cable reference tubing into the case board reference port ........2-11
2-11 Position and secure the cable ........................................2-12
2-12 Preparing the LaserFlow Ex connector receptacle .......................2-13
2-13 Secure caps and connect 310 ultrasonic plug to LaserFlow Ex .............2-13
2-14 Overall dimensions including wall mounting hardware (part 1) ............2-14
2-15 Overall dimensions including wall mounting hardware (part 2) ............2-15
2-16 Typical manhole installation ........................................2-17
2-17 Wall mounting kit (Numbers correspond with Table 2-1) .................2-18
2-18 Wall Mount: Vertical clamp and vertical clamp with tube coupler inserted . . 2-19
2-19 Wall Mount: Sensor carrier installed on tube coupler ....................2-20
2-20 Wall Mount: Place the sensor on the carrier ...........................2-21
2-21 Mounting the sunshade ............................................2-23
2-22 Mounted sunshade ................................................2-24
3-1 Character grid .....................................................3-2
3-2 Menu Tree: LaserFlow Ex Configuration ................................3-3
3-3 Measurement Setup: Sensor input settings ..............................3-4
3-4 Blanking distance for LaserFlow Ex with built-in sensor or with remote ultrasonic
sensor ............................................................3-5
3-5 Measurement setup: Advanced settings for LaserFlow Ex sensor ............3-8
3-6 360 Velocity grid ....................................................3-9
3-7 Selection of velocity measurement points ...............................3-11
3-8 Ultrasonic level adjustment ..........................................3-12
4-1 Activate connected sensors in Flowlink .................................4-1
4-2 Activating connected sensors in Flowlink ................................4-2
4-3 Measurements tab: Displays real-time measurements .....................4-3
4-4 Drop down list of measurements for 2160 Module .........................4-4
4-5 360 Level Measurement tab in Flowlink ................................4-5
4-6 Blanking distance for LaserFlow Ex with built-in sensor or 310 remote ultrasonic
sensor ............................................................4-6
4-7 360 Velocity Measurement tab in Flowlink ..............................4-7
4-8 360 Velocity Tab: Advanced settings ....................................4-8
4-9 Remote distance measurement with the 310 remote ultrasonic sensor .......4-10
4-10 Remote distance measurement with the 310 remote ultrasonic sensor and horizon-
tal sensor mount bracket ............................................4-11

TIENet™ 360 LaserFlow Ex™ Velocity Sensor
Table of Contents
x
4-11 LaserFlow Ex placement using Parallel to Channel Slope option ...........4-12
4-12 LaserFlow Ex placement using Slope Percentage option ..................4-13
4-13 Selection of velocity measurement points ..............................4-15
5-1 Remove large screws and nose piece (3 on each side) .......................5-3
5-2 Location and orientation of cross-pins for mounting block installation ........5-4
5-3 Cleaning the laser window: Moisten Kimwipe tissue w/ Rain-X ..............5-6
B-1 Do not install LaserFlow Ex with built-in sensor in a free-flowing outfall or in a drop
manhole. ..........................................................B-5
B-2 Correct setup when using the LaserFlow Ex module with remote ultrasonic sensor
and horizontal mount bracket .........................................B-6
B-3 Placement of LaserFlow Ex with built-in sensor ..........................B-6
B-4 Placement of LaserFlow Ex with remote ultrasonic sensor .................B-7
C-1 Signature flow data: Selecting the .ddp file(s) ............................C-2
C-2 Signature flow data: Importing the .ddp file .............................C-2
C-3 Identifying error codes in the 360 Velocity data set .......................C-3

1-1
TIENet™ 360 LaserFlow Ex™
Velocity Sensor
Section 1 Introduction
1.1 LaserFlow Ex The TIENet™ 360 LaserFlow Ex sensor is an Area Velocity flow
measurement device that remotely measures flow in open
channels with non-contact Laser Doppler Velocity Sensing and
non-contact Ultrasonic Level Sensing technologies. The sensor
uses advanced technology to measure velocity with a laser beam
at single or multiple points below the surface of the water
stream.
Figure 1-1 Basic LaserFlow Ex system (showing both AC and battery-powered
options)
0612
Laser Flow Module
OR
AC Powered Sites Battery Powered Sites
Level
2160 Module
Signature Meter
The LaserFlow Ex sensor is ideal
for a broad range of wastewater
monitoring applications. It is
compatible with both the Teledyne
ISCO Signature® flowmeter and
the Teledyne ISCO 2160
LaserFlow Module, depending on
the type of installation.
To operate with the LaserFlow Ex,
the Signature requires software
version 1.31 or later.
TIENet
Barrier

TIENet™ 360 LaserFlow Ex™ Velocity Sensor
Section 1 Introduction
1-2
1.2 Design of
LaserFlow Ex
The LaserFlow Ex sensor consists of a housing with two mea-
surement technologies working together.
1.2.1 Measurement
Technology
The laser velocimeter has a laser diode that serves as both
transmitter and receiver of a laser light beam. The
Doppler-shifted signal frequency is used to determine flow
stream velocity.
The ultrasonic level transducer determines the stream’s level
by emitting an ultrasonic pulse and measuring the time it takes
for the echo to return from the stream’s surface. The transducer
is both pulse transmitter and echo receiver.
1.2.2 Cabling The LaserFlow Ex sensor is available with a 10m or 23m
standard length cable. Custom cable lengths are also available
up to 108 feet.
The maximum recommended distance between the TIENet
Barrier and the LaserFlow Ex is 33 meters.
1.3 Operation The laser velocimeter uses a laser beam to generate a source
frequency light, which is focused at points below the surface of
the flow stream. The light is scattered back to the laser. The
returned light is frequency shifted due to the Doppler effect. The
lens that focused the laser light below the surface of the flow
stream focuses the returned light back into the laser. The source
light and shifted light frequencies are separated to determine a
Doppler shift, which is then used to calculate flow stream
velocity.
The ultrasonic level transducer emits multiple ultrasonic
pulses per second. Between pulses, the transducer switches from
transmitter to receiver. When the transducer receives the echo
from the water’s surface, the sound energy is converted into an
electrical signal. The signal is then amplified and processed by
the flowmeter into an echo-received signal. The time between the
transmitted pulse and the echo-received signal is proportional to
the distance between the transducer and the liquid surface,
which is then used to calculate level. Because the speed of the
pulse through air varies with temperature, compensation is
built-in. A temperature sensor inside the level transducer
measures ambient temperature. The microprocessor program
automatically compensates for speed-of-sound changes caused by
air-temperature changes.
The LaserFlow Ex operates with no deadband from the mea-
surement point for both level and velocity measurement.

TIENet™ 360 LaserFlow Ex™ Velocity Sensor
Section 1 Introduction
1-3
1.4 Technical
Specifications
Table 1-1 provides technical specifications for the LaserFlow Ex.
Table 1-1 LaserFlow Ex Sensor Specificationsa
Size (H x W x D) 18.0 x 9.5 x 23.5 in 45.7 x 24.1 x 59.7 c,
Cable Lengthsb10 or 23 m 32.8 or 75.5 ft
NOTE: 33 m max from LaserFlow Ex to TIENet barrier.
Weight 24.8 lbs (11.25 kg)
Materials Conductive Carbon Filled ABS Plastic, SST, Conductive
Kynar®c, Anodized Aluminum, UV Rated PVC
Enclosure (self-certified) IP68 (Submerged@2mdepth for 72 hrs)
Certification CE EN61326; FDA CDRH 21CFR1040; IEC 60825-1
Class 1, Div 1, Gr. C–D, T4, Ex ia
Class1, Zone 0, Ex/AEx ia op is IIB T4 Ga
Ex ia op is IIB T4 Ga
IECEx II1GExiaopisIIBT4Ga
-10 °C < Tamb < +60 °C
Laser Class Class 3R
Laser Wavelength 655 nm
Laser Exit Angle 45° ±3°
Input Voltage (Operating) 10 to 13VDC Recommend; 8VDC Minimum
Input Power (Operating) 1.6W/200mA
Electrical Connections Signature flowmeter, Screw Terminal, 2160 LaserFlow Mod-
ule, TIENet Plug, TIENet Barrier
Temperature Range Operating: 14 to 140 °F (-10 to 60 °C)
Storage: -40 to 140 °F (-40 to 60 °C)
Flow Accuracy ±4% of Reading (Typical under less than half pipe flow con-
ditions.)
Velocity Measurement
Technology Non-Contact, Subsurface Laser Doppler Velocity
(U.S. patent 8,339,584 and patents pending)
Measurement Range 0.5 ft/s to 15 ft/s 0.15 to + 4.6 m/sec
Number of velocity readings per measurement 1 to 3 (selectable measurement points)
Maximum distance: liquid surface to bottom of sensor 3m (10 ft)
Minimum depth for velocity measurement 0.01m (0.5 in)
Minimum Velocity 0.5 ft/s (0.15 m/s)
Deadband Zero deadband from bottom of LaserFlow Ex sensord
Accuracy in full pipe or lower flow conditions ±0.5% of reading ±0.03 m/s (0.1 ft/s)

TIENet™ 360 LaserFlow Ex™ Velocity Sensor
Section 1 Introduction
1-4
Level Measurement
Technology Non-Contact Ultrasonic Signal
Measurement Range 0 to3m(0to10ft)from measurement point
Accuracy @ 22 °C ±0.006m (0.02 ft) at < 1ft level change;
±0.012m (0.04 ft) at > 1ft level change
Ultrasonic Temperature Coefficient ± 0.0002 x D (m) per °C (± 0.00011 x D (ft) per °F)
(Where D is the distance from transducer to liquid surface)
Ultrasonic Beam Angle 10° (5° from center line)
Ultrasonic Signal 50KHz
Deadband Zero deadband from bottom of LaserFlow Ex sensor
a. All specifications are subject to change without notice.
b. Custom cable lengths also available.
c. Kynar® is a registered trademark of Arkema, Inc.
d. Deadband for 310 remote ultrasonic sensor varies due to the type of mounting hardware.
Table 1-1 LaserFlow Ex Sensor Specificationsa(Continued)

TIENet™ 360 LaserFlow Ex™ Velocity Sensor
Section 1 Introduction
1-5
1.5 Accessories Accessories used in sensor installation are briefly described
below. Refer to the next section for ordering information.
1.5.1 Ordering Information Options and accessories can be purchased by contacting Teledyne
ISCO’s Customer Service Department.
Teledyne ISCO
Customer Service Dept.
P.O. Box 82531
Lincoln, NE 68501 USA
Phone: [phone]
FAX: [phone]
E-mail: [email protected]
Cord grip fitting, 3/4" NPT, for TIENet™ cable ....................................................................... 209-0073-12
Signature flowmeter Exterior desiccator
(required for use with 330 and 350 TIENet™devices) ........................................................... 60-4354-019
Silica gel desiccant, 1.5-lb container ....................................................................................... 099-0011-03
LaserFlow Ex Instruction Manual .......................................................................................... 69-4363-085
Signature Flowmeter Instruction Manual.............................................................................. 69-4303-070
Signature Bubbler Flowmeter Instruction Manual................................................................ 69-4333-004
Permanent Wall Mounting Hardware Kit............................................................................... 60-4364-003
Refer to Section 2.6.1 Wall Mount Installation for additional information.
Note
Teledyne ISCO uses FreeRTOS version 5.4.2 in its TIENet™
devices. In accordance with the FreeRTOS license, FreeRTOS
source code is available on request. For more information, visit
www.FreeRTOS.org.

TIENet™ 360 LaserFlow Ex™ Velocity Sensor
Section 1 Introduction
1-6
1.6 Unpacking
Instructions
When the system arrives, inspect the outside packing for any
damage. Then carefully inspect the contents for damage. If there
is damage, contact the delivery company and Teledyne ISCO (or
its agent) immediately.
WARNING
If there is any evidence that any items may have been
damaged in shipping, do not attempt to install the unit.
Please contact Teledyne ISCO (or its agent) for assistance.
When you unpack the system, check the items against the
packing list. If any parts are missing, contact the delivery
company and Teledyne ISCO’s Customer Service Department.
When you report missing part(s), please indicate them by part
number. In addition to the main packing list, there may be other
packing lists for various sub-components.
It is recommended that you retain the shipping cartons as they
can be used to ship the unit in the event that it is necessary to
transport the system. Please complete the registration card and
return it to Teledyne ISCO.
1.6.1 Protective Window Cap Leave the protective window cap in place until the sensor is
ready to be installed.
Before installation, remove the cap. The sensor will not be able to
measure velocity with the cap in place. Retain the cap for use
during cleaning, storage, or shipment, to protect the laser
window from damage.
CAUTION
Be sure the protective window cap is installed during cleaning,
storage, or shipment.
Figure 1-2 Remove protective window cap before installation

2-1
TIENet™ 360 LaserFlow Ex™
Velocity Sensor
Section 2 Preparation and Installation
2.1 Safety Before installing, operating, or maintaining this equipment, it is
imperative that all hazards and preventive measures are fully
understood.
2.1.1 Site Conditions Components are often installed in confined spaces. Some
examples of confined spaces include manholes, pipelines,
digesters, and storage tanks. These spaces may become haz-
ardous environments that can prove fatal for those unprepared.
These spaces are governed by OSHA 1910.146 and require a
permit before entering.
WARNING
The installation and use of this product may subject you to
hazardous working conditions that can cause you serious
or fatal injuries. Take any necessary precautions before
entering a worksite. Install and operate this product in
accordance with all applicable safety and health
regulations, and local ordinances.

TIENet™ 360 LaserFlow Ex™ Velocity Sensor
Section 2 Preparation and Installation
2-2
2.1.2 Installation in
Hazardous Locations
Read all labels carefully before installing the equipment!
The Laserflow Ex device is ATEX-approved for use in potentially
explosive atmospheres when specific conditions are met, as
described in this section in reference to “X” Marking.
The LaserFlow Ex is Group II, Category 1G equipment for use in
gas hazard zones 0, 1, and 2 (European standards), or Class I
Division 1 (North American standards).
The braid-drain lead depicted in Figure 2-1 is normally bonded to
earth through the Signature connector case terminals or conduit.
The mounting bracket used with the LaserFlow Ex should be
installed such that there is a conductive path from the LaserFlow
Ex case to earth. The internal circuitry utilizes a ground con-
nection to the conductive case.
Installation must be performed only by trained, qualified per-
sonnel.
Barriers or isolators required for certifiable safe installation are
the responsibility of the user. Refer to the control drawings pro-
vided in Figures 2-9.
CAUTION
Use only non-sparking metal for US mounting hardware.
Check with local authorities.
WARNING
The mounting bracket is a potential isolated charge carrier.
For classified hazardous locations, refer to section 12.2.4
and local authorities for installation requirements.
Serpentine loop
WARNING
Do not coil the sensor cable; this will form an inductor and
create a hazard. The cable should be kept as short as is
practical. If necessary, use a serpentine loop (see figure at
left) instead.
2.1.3 ImportantInformation
Regarding “X” Marking
The ATEX labeling on the serial tag of the LaserFlow Ex device
includes a number ending in “X.” The X marking indicates that
there are specific conditions that must be met in order for the
equipment to comply with intrinsic safety requirements. Refer to
Figure 2-1 on the following page.
These specific conditions are as follows:
• The cable must be terminated in a manner suitable for
the zone of installation.
• The physical spacing between the exposed ends of each
insulated wire lead, and earth ground and other IS
circuits, must be such that the equipment is isolated up
to 500V, and to 1500V for non-IS circuitry.