Net Safety Monitoring Banshee343 Operating Manual
Ultrasonic Pressurized Gas Leak Detector
User Operation Manual
Model: NSM-SU343
MAN-0129 Rev 0.3
December 8, 2010
IMPORTANT INFORMATION
Net Safety Monitoring Inc.
Direct: (403) 219-0688
Corporate Headquarters
Facsimile: (403) 219-0694
2721 Hopewell Place NE
E-mail: nsmsales@net-safety.com
Calgary, AB Canada T1Y 7J7
Web-site: www.net-safety.com/
This manual is for informational purposes only. Although every effort has been made to ensure the
correctness of the information, technical inaccuracies may occur and periodic changes may be made
without notice. Net Safety Monitoring Inc., assumes no responsibility for any errors contained within this
manual.
If the products or procedures are used for purposes other than as described in the manual, without
receiving prior confirmation of validity or suitability, Net Safety Monitoring Inc., does not guarantee the
results and assumes no obligation or liability. No part of this manual may be copied, disseminated or
distributed without the express written consent of Net Safety Monitoring Inc.
Net Safety Monitoring Inc., products are carefully designed and manufactured from high quality
components and can be expected to provide many years of trouble free service. Each product is
thoroughly tested, inspected and calibrated prior to shipment. Failures can occur which are beyond the
control of the manufacturer. Failures can be minimized by adhering to the operating and maintenance
instructions herein. Where the absolute greatest of reliability is required, redundancy should be designed
into the system.
WARRANTY
Net Safety Monitoring Inc warrants its electronic assemblies against defective parts and workmanship
for a period of 18 months from date of purchase to 12 months from the date of commissioning,
whichever is the shorter period. No other warranties or liability, expressed or implied, will be honored by
Net Safety Monitoring Inc. Contact Net Safety Monitoring Inc. or an authorized representative for
details.
We welcome your input at Net Safety Monitoring. If you have any comments please contact us at the
phone/ address below or visit our website and complete our on-line customer survey: www.net-
safety.com/
If further language translation for this manual is required please contact:
CONTACT INFORMATION
© Net Safety Monitoring, Inc. 2010. All rights reserved.
MAN-0129 SU343 Rev 0.3 Page 2 of 50
TABLE OF CONTENTS
1. Product Overview ............................................................................................................................. 4
1.1. Technical Specification ............................................................................................................... 5
1.2. Design Standards ....................................................................................................................... 6
2. General Operation ............................................................................................................................ 7
2.1. Overall Dimensions ..................................................................................................................... 8
2.2. Electrical Connection Drawing .................................................................................................... 9
3. Installation / Commissioning / Maintenance ................................................................................ 10
3.1. Installation Procedure ............................................................................................................... 10
3.1.1. Mechanical Installation .................................................................................................... 10
3.1.2. Mechanical Positioning ................................ ................................................................... 11
3.1.3. Wall / Flat Surface Mounting ........................................................................................... 13
3.1.4. Pole Mounting ................................................................................................................. 14
3.1.5. Vibration Mounting .......................................................................................................... 15
3.1.6. Electrical Installation ....................................................................................................... 17
3.2. Commissioning ......................................................................................................................... 21
3.2.1. Visual .............................................................................................................................. 21
3.2.2. Power up ........................................................................................................................ 22
3.2.3. User Changeable Functions Set-up ................................................................................ 22
3.2.4. Function Check ............................................................................................................... 26
3.3. Operating Principles / Instruction .............................................................................................. 26
3.3.1. Normal Operation ........................................................................................................... 26
3.3.2. Alarm Level ..................................................................................................................... 27
3.3.3. Alarm Delay ................................................................................................ .................... 28
3.3.4. Self-Test and Self-Clean ................................................................................................. 30
3.3.5. Heating (Optional) ........................................................................................................... 31
3.3.6. Output Options ................................................................................................................ 32
3.4. Maintenance Procedures .......................................................................................................... 39
3.4.1. Hand held Test ............................................................................................................... 39
3.4.2. Verification Test .............................................................................................................. 40
4. Customer Interface Commands .................................................................................................... 40
4.1. RS485 Digital Interface ............................................................................................................. 40
4.1.1. Customer Commands ..................................................................................................... 40
5. Warnings......................................................................................................................................... 43
5.1. Use in Hazardous Areas ........................................................................................................... 43
5.2. Ownership & Confidentiality ...................................................................................................... 44
5.3. Accessories .............................................................................................................................. 44
5.4. Liability ...................................................................................................................................... 44
6. Accessories and Spare Parts ........................................................................................................ 45
6.1. Accessories .............................................................................................................................. 45
6.2. Spare Parts ............................................................................................................................... 46
6.3. Ordering Information ................................................................................................ ................. 47
6.4. Accessories .............................................................................................................................. 48
6.5. Spare Parts ............................................................................................................................... 48
MAN-0129 SU343 Rev 0.3 Page 3 of 50
1. PRODUCT OVERVIEW
NSM-SU343 is an ultrasonic gas leak detector for detecting airborne ultrasound generated from
pressurized gas leaks.
Airborne ultrasound is generated when gas moves from a high-pressure area to a low pressure area
with a ratio of 1.8:1 upstream to downstream, however, NSM-SU343 is only recommended for pressures
down to 2 bar(29psi). The amount of airborne ultrasound generated is due to a number of factors
including but not limited to gas pressure, leak size and gas temperature.
NSM-SU343 uses 4 individual piezo ceramic sensing heads. The sensor design makes the sensing
heads virtually indestructible and totally immune to temperature, moisture and other contaminants found
in hazardous industry.
NSM-SU343 has a large dynamic range which allows use in a large range of applications from
laboratories to turbine houses. The multi-stage amplifier ensures a completely linear output across the
entire detector range without drop-off at each end of range.
NSM-SU343 is not designed to detect specific gas types, LEL or ppm, but instead responds
instantaneously to a wide range of leak sizes whilst being un-affected by even the most extreme weather
conditions. NSM-SU343 is rated to IP66 / IP67 to withstand harsh environments and continues to work
during temporary immersion.
NSM-SU343 uses a continuous background monitoring test feature alongside a broadband self-test and
clean facility to ensure complete functionality. The broadband self-test comprises a pressurized air jet
across both flat faces of the cylindrical piezo crystal so testing is confirmed using the medium of interest.
The broadband self-test can be requested on demand from the main control system or programmed to
activate at known intervals.
NSM-SU343 has an optional heating / cooling facility which enables the internal electronics to be kept
within normal parameters even at ambient temperatures such as -55°C (-67°F) to +85°C (+185°F).
Unlike most heating systems the NSM-SU343 has an ultra efficient heating system that reacts to the
environment allowing minimal power usage.
NSM-SU343 has complete customer flexibility and can be configured to mimic existing forms of detector
outputs and protocol featuring 4 – 20mA analogue output and RS485 digital interface.
NSM-SU343 also features infra-red communication which allows complete communication and setting
ability from up to 8m (26ft) range using the NSM -SU343 handheld series of intelligent communicators.
NSM-SU343 handheld series allows users to map for ultrasound, test ultrasonic detectors using a
powerful 40kHz sound source of 100dB at 1m (3ft), communicate and program the NSM-SU343 and
communicate via Infra-red interface. See section 6 Accessories and Spare Parts or contact a Net Safety
Monitoring representative for further details.
MAN-0129 SU343 Rev 0.3 Page 4 of 50
1.1. TECHNICAL SPECIFICATION
General
Detection method
Floating Piezo Ceramic – non consumable, non ageing.
Gases detected
All pressurised gases, minimum leak pressure 2 bar, leak size
dependant
Self-test
Continuous background check and broadband pressurised gas
release on demand or via customer defined cycle
Calibration
Factory set. Broadband self-test check requires no field calibration
Performance
Detection range
25kHz to 100kHz
Dynamic range
50dB to 140dB
Response time
Instantaneous (alarm delay via 1 second variable increments –
customer programmable)
Detection coverage
2 to 40 meter (7 to 131 foot) radius (leak pressure, size and
background level dependant)
Test frequency
>2Hz to <100kHz ±2kHz at defined frequencies
Test sound pressure
100dB ±4dB at sensor
Start-up time
Less than 20 seconds
Output Signal
4 – 20mA
Current source 4 – 20mA, corresponds to 40 to 200dB SPL –
Maximum load resistance 500Ω standard (options available)
Digital
RS485 interface
Option
Current sink 4 – 20mA
Relay 1
Error / Fault (NO or NC option) Load: 2A max. Switch Voltage
220VDC max. Indication resistance 70 milliohm. See Section 3.3.6.1
Relay Options for further configurations.
Relay 2
Alarm (NO or NC option)
Relay 3
Maintenance (Alert for next maintenance schedule – non urgent)
Detector Faults
0mA
No power or microprocessor fault
0.5mA
Over temperature fault
1.0mA
Watchdog fault, electronic test fault, high/low voltage fault.
2.0mA
Test Fault
2.5 to 3.0mA
Function Fault
Power
Supply
24V DC, range 15 – 30 V DC
Current Consumption
250mA normal operation
3A maximum at -55°C (-67°F) heated option
Cable entry
M20 x 2 Ex d cable gland (M25 x 2, ½” NPT x 2, ¾ NPT x 2 or any
combination option)
M20 x 2 serial link option
MAN-0129 SU343 Rev 0.3 Page 5 of 50
Temperature Range
Storage
-40°C to +70°C (-40°F to +158°F)
Operating
-40°C to +85°C (-40°F to +185°F)
Operating option
-55°C to +85°C (-67°F to +185°F)
Humidity (operating)
0 to 100% relative humidity
Ingress Protection
IP66 / IP67
Approvals
ATEX
II 2 G Ex d ib IIB+H₂ T4 Gb (Tamb -55°C to +85°C)
ITS09ATEX16836X
IECEx
Ex d ib IIB+H2 T4 Gb (Tamb -55°C to +85°C)
IECEx ITS 10.0004X
Enclosure
Stainless steel AISI 316.
Weight Approx. 8kg (17.5 lb)
Aluminium LM25TF BS1490.
Weight Approx. 6.5kg (14.3 lb)
Dimensions (without bracket)
Ø210 x 272mm (Ø8 1/4 “ x 10 3/4 “)
1.2. DESIGN STANDARDS
IEC / EN60079-0:2009 Electrical apparatus for potentially explosive atmospheres – Part 0: General
requirements
IEC/EN60079-1:2007 Electrical apparatus for potentially explosive atmospheres – Part 1: Equipment
protection by flameproof enclosures “d”
EN60079-11:2007 Electrical apparatus for potentially explosive atmospheres – Part 11: Equipment
protection by intrinsic safety “i”
EN60529:1992 Specification for degrees of protection provided by enclosures (IP code)
MAN-0129 SU343 Rev 0.3 Page 6 of 50
2. GENERAL OPERATION
NSM-SU343 is omni-directional and is recommended to be mounted between 3 to 5 meters (10 to 16
feet) above the area of interest to eliminate ground absorption and reflections.
It is recommended that the area where the NSM-SU343 is to be situated is ultrasonically mapped prior
to installation or at commissioning whilst all process is running to establish a background noise level for
alarm purposes. Alarm level should be set 6dB above the background noise level at levels below 70dB
and then the value above background shown in the alarm level graph in section 3.3.2 Alarm Level.
Please contact a Net Safety Monitoring representative to request a mapping survey or mapping tools.
NSM-SU343 responds to pressurized gas leaks or sources of ultrasonic noise between 25kHz and
100kHz instantaneously, it is, therefore, recommended that a time delay is built in to the control system
or internally in the NSM-SU343 to prevent spurious alarms. This is especially important in areas with
pressure relief valves or areas of high human involvement or maintenance work. The alarm delay is
recommended at a minimum of 10 seconds but this should be increased in response to the process
located near to the detector as shown in the graph in section 3.3.3 Alarm Delay.
Area monitored by NSM-SU343 is affected by several factors such as background noise level, gas
pressure, leak size, temperature of gas and environmental conditions. Net Safety Monitoring has
formulated a series of calculations and built up a database of detection radius using gas leak testing to
determine accurate coverage information for most situations. Please contact Net Safety Monitoring or a
Net Safety Monitoring representative to advise on appropriate coverage for each installation.
NSM-SU343 detection coverage can be verified at installation or as part of a maintenance schedule
using the NSM-PTV Performance Target Verification Kit to simulate an actual gas release of known size
and pressure at the perimeter of the NSM-SU343 detection radius. See section 6 Accessories and
Spare Parts or contact a Net Safety Monitoring representative for further details.
Compared to other Ultrasonic and traditional forms of detection, the NSM-SU343 has the following
advantages:
Presence of gas is not required
Unaffected by weather conditions
Sensors are unaffected by temperature, pressure, moisture and contaminant build-up
Multiple sensor redundancy in each unit
Continuous and forced self-test function
Self-clean function
No calibration required results in cost saving over detector life cycle
Can be remotely tested from up to 8m (26ft) distance saving on maintenance scaffold costs
Can be remotely programmed from control room or 8m (26ft) distance using handheld
communicator
Can be programmed to mimic any detector inputs to suit existing control system
Can be set-up to act as a standalone unit
Multiple Detectors can be linked together to save control system I/O
MAN-0129 SU343 Rev 0.3 Page 7 of 50
2.1. OVERALL DIMENSIONS
MAN-0129 SU343 Rev 0.3 Page 8 of 50
2.2. ELECTRICAL CONNECTION DRAWING
MAN-0129 SU343 Rev 0.3 Page 9 of 50
3. INSTALLATION / COMMISSIONING / MAINTENANCE
Warnings:
The area in which the detector may be mounted must be in accordance with the certification of
the apparatus and in accordance with the standards of the appropriate authority in the country
concerned.
Do not modify the enclosure or component parts as this will compromise the Hazardous Area
Certification.
Ensure all wiring and power supply to the detector is within specified operating parameters.
NSM-SU343 is a sealed unit with the exception of the terminal cover; the main enclosure is not to
be opened by anybody other than Net Safety Monitoring or Net Safety Monitoring authorized
personnel. All warranties and certification are nullified if these seals are broken or tampered
with.
NSM-SU343 is supplied without cable glands. Ensure all cable entry threads are sealed with an
appropriate plug to eliminate water ingress and thread damage. At installation all shipping cable
entry plugs are to be removed and replaced with suitably approved Ex d cable glands or plugs.
3.1. INSTALLATION PROCEDURE
Mounting height of NSM-SU343 is recommended between 3 and 5 meters (10 and 16 feet) above floor
level to eliminate ground reflections and absorption. NSM-SU343 may be used lower than 3 meters (10
feet) but coverage may be reduced, please contact Net Safety Monitoring or a Net Safety Monitoring
representative for details.
It is recommended that all identification tags are firmly secured to prevent unwanted locally generated
ultrasonic noise.
Observe the area of installation for equipment capable of generating high levels of spurious airborne
noise that would not be classified as normal background noise such as pressure release valves,
helipads, sirens etc. If any are present in the detector range of coverage please contact Net Safety
Monitoring or monitor detector when activated to ensure immunity.
3.1.1. MECHANICAL INSTALLATION
NSM-SU343 incorporates a dedicated flameproof terminal compartment certified to Ex d, a flameproof
main electronics compartment certified to Ex d, and a pump compartment which contains no electrical
devices, all are sealed to IP66/IP67.
NSM-SU343 has a large detection radius capability and care should be taken when positioning to utilize
the maximum detector coverage and eliminate blind spots and spurious alarms.
NSM-SU343 has a variety of fixing options to incorporate installation into most situations found in
industrial environments such as wall / flat surface (section 3.1.3), vertical / horizontal pole (section 3.1.4)
and vibrating surfaces (section 3.1.5). If fixing is required to mount the detector into a position which falls
outside of the scope of the standard mounting options please contact a Net Safety Monitoring
representative for details of specialist design service.
NSM-SU343 can be mounted in any orientation but care should be taken to position the display facing
an area with ease of access to allow the information to be viewed. Note: The infra-red send and receive
ports are located above the display, if remote programming is required then care should be taken that
line of sight to the display can easily be achieved up to a maximum distance of 8m (26ft).
MAN-0129 SU343 Rev 0.3 Page 10 of 50
3.1.2. MECHANICAL POSITIONING
Figure 1
NSM-SU343 utilizes 4 independent sensors heads for full coverage. Figure 1 shows a 3D view of the
coverage (detector not to scale) at a 3m (10ft) height above floor level with the detector pointing
vertically downwards. NSM-SU343 coverage is specified as meters radius at the floor level as this is the
minimum sensing distance. As shown the entire area below the detector is covered as well as some of
the area above and around the detector. Each sensor overlaps the next so areas underneath the
detector are covered by multiple sensors.
Note: The figure shows coverage stopping at 75° perpendicular from the sensor face, in reality it will
decrease so the area above the detector will also have some limited coverage.
Figure 2 shows a 2D view of coverage when the detector is mounted vertically downwards and
highlights that the radius coverage stated is the minimum area covered.
MAN-0129 SU343 Rev 0.3 Page 11 of 50
Figure 2
Figure 3
Figure 3 shows coverage when the detector is mounted at an angle, this method is recommended when
the detector is mounted close to a wall or in an enclosed space to increase the coverage area.
MAN-0129 SU343 Rev 0.3 Page 12 of 50
3.1.3. WALL / FLAT SURFACE MOUNTING
When mounting on a vertical flat surface such as a wall with no significant vibration (<20kHz) it is
sufficient to use just the standard mounting bracket supplied with the NSM-SU343.
MAN-0129 SU343 Rev 0.3 Page 13 of 50
3.1.4. POLE MOUNTING
MAN-0129 SU343 Rev 0.3 Page 14 of 50
In large open areas it is recommended that the NSM-SU343 is pole mounted to take advantage of the
large omni-directional detection coverage. The detector should be mounted 3 to 5 meters (10 to 16 feet)
high to eliminate reflections and ground absorption. NSM-SU343 may be used lower than 3 meters (10
feet) but coverage may be reduced, please contact Net Safety Monitoring or a Net Safety Monitoring
representative for details.
Pole should be mounted to local standards and be capable of supporting the detector weight at the
installation height when environmental factors are taken into consideration.
NSM-SU343 is attached to the pole using 2 U-bolts fixed to the mounting bracket. Suggested U-bolt
torque is 9Nm but local standards should be used in the first instance.
NSM-SU343 can be supplied with a vertical mounting accessory that allows the detector to be mounted
on a ceiling / upper deck or a horizontal pipe.
Figure 4
Figure 4 shows typical mounting arrangement for a horizontal pole. If ceiling or upper deck mounting is
required the upper U-bolts can be replaced using appropriate fixings.
3.1.5. VIBRATION MOUNTING
If significant vibration (resonance) is found at the mounting point (below 20kHz) it is recommended that
the vibration plate is used to eliminate excessive stress on the fixings and internal components of the
detector.
If significant vibration is found at the mounting point in the detector sensing range (between 20kHz and
100kHz) the vibration plate must be used to avoid spurious results.
NSM-SU343 can mounted on a wall / flat surface or a pole subject to vibration as described in sections
3.1.3 and 3.1.4 using the vibration damping plate accessory.
MAN-0129 SU343 Rev 0.3 Page 15 of 50
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