HWM PermaNET SU User manual

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User Guide: PermaNET SU Installation and Setup
(Using HWM IDT).
Warning: This manual contains important safety and operating information.
Please read, understand and follow the instructions in the manual
and also the safety / approvals document shipped with the device.
MAN-155-0001-D July 2022

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TABLE OF CONTENTS
1Introduction, Background and Support of Product........................................................5
1.1 Safety ..........................................................................................................................5
1.2 Background ................................................................................................................5
1.3 Operating Temperature ............................................................................................5
1.4 Logger - Unpacking ....................................................................................................5
1.5 Support of Product ....................................................................................................6
2Overview and preparation for use...................................................................................7
2.1 Logger - Device Overview..........................................................................................7
2.1.1 Measurement data types...................................................................................7
2.1.2 Battery / lifetime .................................................................................................7
2.1.3 Cellular communications and SIM-card............................................................7
2.1.4 Communications with the mobile phone (or similar device)..........................8
2.1.5 Logger operation - Repetitive functions ...........................................................8
2.2 System Overview........................................................................................................9
2.3 Mobile Phone (or similar device) ............................................................................10
2.3.1 Specification......................................................................................................10
2.3.2 Installing the HWM software (Android version) .............................................10
2.4 Loggers –Secure vs Insecure ..................................................................................11
2.5 DataGate...................................................................................................................11
2.5.1 DataGate –Giving the App access to use Loggers.........................................11
2.5.2 DataGate –Terminology and Summary .........................................................12
2.6 Logger Measurement Data –Destination and Use...............................................12
2.7 Ways to set the Logger Configuration....................................................................13
2.8 IDT –Test of logger within an installation..............................................................13
2.9 Overview of the deployment process ....................................................................13
3Antenna Options and Installation Guidelines...............................................................16
3.1 Antenna Options......................................................................................................16
3.1.1 Monopole ..........................................................................................................16
3.1.2 T-Bar ..................................................................................................................17
3.1.3 Button................................................................................................................18
3.1.4 Cone Antenna ...................................................................................................20
3.1.5 Magnetic Dipole Antenna ................................................................................21
3.2 Installation Guidelines.............................................................................................21

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3.3 Installation Process Decision Tree..........................................................................22
4Waking the Logger and Communications Link .............................................................23
5IDT app –Logging in and use .........................................................................................24
5.1 Use of IDT without Logging in.................................................................................24
5.2 Logging in and initial actions...................................................................................24
5.3 IDT app - Selecting a PermaNET SU........................................................................26
5.3.1 Automatic Selection using barcode scan........................................................26
5.3.2 Manual Selection using Bluetooth scan..........................................................27
5.4 IDT –Update Logger Firmware ...............................................................................28
5.5 IDT –Device Options –Configure, Test or Deploy.................................................28
5.6 IDT –Configure Device menu. ................................................................................29
5.6.1 IDT –Logger device - Device Information.......................................................29
5.6.2 IDT –Logger device - Call Settings...................................................................31
5.7 IDT –Test Device menu ...........................................................................................32
5.7.1 IDT –Logger device - Sensor Test (Audio Noise Level) ..................................32
6Positioning and Installing the Antenna .........................................................................33
6.1 IDT –Signal Test (mobile network signal strength - CSQ).....................................33
6.2 IDT –Call Test (logger to server) .............................................................................34
6.3 Troubleshooting a Call Test failure.........................................................................35
6.3.1 Possible Issues and Checks .............................................................................35
6.3.2 Antenna - Installation considerations.............................................................36
6.3.3 General Considerations ...................................................................................36
7IDT –Deploy Device.........................................................................................................38
8DataGate –Setup for use & Changes made by apps ...................................................39
8.1 DataGate –Example Structure for use...................................................................39
8.2 DataGate –Required User Role permissions ........................................................40
8.3 DataGate –Changes made by HWM apps.............................................................40
9DataGate –Remote programming of a Logger.............................................................45
9.1 Overview of operation.............................................................................................45
9.2 Automatic and Scheduled sound recordings ........................................................45
9.3 Alarms and Fault conditions ...................................................................................48
9.3.1 Channel alarms.................................................................................................48
9.3.2 System Alarms ..................................................................................................49
9.3.3 Pipe Leak detected ...........................................................................................49
9.3.4 Logger fails to call-in with data........................................................................49

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10 Removal of a logger from a site .................................................................................50
11 Service and Repair.......................................................................................................52
12 Troubleshooting ..........................................................................................................53
12.1 The User cannot log in.............................................................................................53
12.2 The IDT app does not list the logger ......................................................................53
12.3 The data from the logger does not appear on DataGate. ....................................53

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1INTRODUCTION,BACKGROUND AND SUPPORT OF PRODUCT
Thank you for choosing an HWM data device. We trust it will provide you with many
years of service. This user guide covers PermaNET SU models (SU/L/*/*).
1.1 SAFETY
Before continuing, carefully read and follow the information in the “Safety Warnings
and Approvals Information” document, supplied with the product.
Retain all documents for future reference.
1.2 BACKGROUND
Pipeline leaks are a constant burden to water industries, which can affect the efficiency
of the individual company’s performance. Leakage loss reduces the amount of fluid
actually being delivered, thus affecting the financial side of the business. The longer the
leak is left, the larger the economic, and potentially environmental, consequences. It is
therefore more beneficial and safer to detect a leak early and make repairs to the pipes
before significant damage to the business is caused.
At HWM, we pride ourselves in designing the best leak detection equipment at an
affordable price for the benefit of water and gas companies.
1.3 OPERATING TEMPERATURE
Refer to the PermaNET SU Datasheet or your sales representative for guidance on the
storage and operating temperature range of the device. Ensure the unit is within the
operating temperature range prior to installation.
1.4 LOGGER -UNPACKING
As you unpack your new logger, please confirm that you have the following parts:
•PermaNET SU data logger.
•Antenna (for direct attachment or cabled attachment).
•(Optional) Antenna extension cable.
IMPORTANT SAFETY WARNING:
This equipment uses a high strength magnet and should
not be carried by or be placed in the proximity of anyone with a
heart pacemaker.
The magnet can permanently corrupt magnetic storage media
such as floppy discs, hard discs and tapes etc… It can also
damage TV and PC monitor screens and some watches.

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•(Optional) Antenna mounting bracket / hook.
•(Optional) Magnet tool.
•Safety Warnings and Approvals Information.
If there are any omissions, please contact our sales team to rectify or supply the missing
parts. Please dispose of your waste packaging responsibly.
1.5 SUPPORT OF PRODUCT
This user-guide covers the PermaNET SU product family of leak detection equipment.
The device (which will be referred to as a “logger” throughout this manual) is used in
conjunction with a mobile-phone software application called “IDT”. IDT is used to assist
the user to test and deploy the loggers.
This user-guide provides a brief description of the PermaNET SU functionality. It also
covers the use of the IDT app. It includes the setup (registration) of the logger within
DataGate, as this can be a requirement for the IDT app to correctly function with the
loggers you own.
Note: The screen contents, icons and functionality may change from time to time,
due to ongoing development and improvements, so may appear different in
the version of the IDT you have installed. Screen resolution differences can also
cause changes. IDT can run on mobile phones and other devices with an Android
operating system, such as tablets. (An Apple iOS version is also being developed).
HWM also provides support of the product by means of a web-page:
https://www.hwmglobal.com/permanet-su-support/
Should you have any questions that are not covered by a manual, or Frequently Asked
Questions (FAQs) provided online, please contact the HWM Technical Support team on
[phone], or email cservic[email protected]

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2OVERVIEW AND PREPARATION FOR USE
2.1 LOGGER -DEVICE OVERVIEW
Note: The loggers have standard settings for operation programmed into
them prior to shipping from the factory, with some variations according to
customer requirements.
Your logger(s) may therefore differ slightly from the descriptions that follow.
The PermaNET SU product family are logger devices with an integrated Leak Noise
Sensor, built by HWM. They are of a waterproof construction, being designed to be
permanently installed around a water network, listening for leaking pipes. The devices
accomplish this by means of a specialised microphone that can detect the sounds
emitted from a leak. A micro-controller, built into the unit, measures the noise level
once per day and performs a statistical analysis to generate data for a “noise
histogram”. A leak-state judgement is made, along with two additional results called
“level” and “spread”. The results are saved in memory, for upload at a later time.
2.1.1 Measurement data types
The saved data could be in the form of:
•A “noise histogram”.
This provides a detailed indication of how consistent the noise measurement
is, and it can be used for more advanced analysis. Histograms can also help
to visualise the noise into patterns that can be identified as leaks.
•A Level / Spread indication.
These two figures are a numeric summary of the noise histogram.
The “Level”figure represents the sound level that occurs most often during
the sample period.
The “Spread”figure is how much the sound level varies during this time.
(A large consistent Level and small Spread is typical of a leak, whereas
a small Level and large Spread is typical of background noise within a pipe).
•A “leak / no leak” status.
This gives a simple indication of whether results indicate a probable leak.
•Sound recording files.
2.1.2 Battery / lifetime
The logger is powered by non-rechargeable Lithium batteries. The logger is designed to
minimise the battery use and thus increase the life expectancy of the unit (e.g. the
loggers become active when needed; most of the time they are in standby). The battery
life is also affected by user-programable settings.
2.1.3 Cellular communications and SIM-card
The PermaNET SU logger includes an interface to the cellular communications network,
which provides access to the internet. The data stored within the loggers can be sent

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automatically over internet using the mobile communications network. The normal
destination of the data is the HWM DataGate server.
Communication is 2-way between the logger and server, by means of a proprietary
protocol using UDP packets sent to the internet using the cellular communications
network.
A SIM card is fitted within the logger.
2.1.4 Communications with the mobile phone (or similar device)
The logger includes a Bluetooth-compatible interface, used for short-range
communication to other Bluetooth-compatible devices (e.g. a mobile phone). This
enables the user to communicate with the logger during installation and make on-site
tests.
2.1.5 Logger operation - Repetitive functions
The PermaNET SU is shipped from the factory in a minimally active state, to extend
battery life whilst in storage (e.g. no measurements are made or logged). This mode is
designed for periods of storage or shipping of the device, with the logger referred to as
being in “shipping mode”, or “sleeping”. Once activated (see section 4), the logger no
longer sleeps, but begins its repetitive daily tasks. Whenever possible it saves power by
putting circuits it does not currently need into “standby” (e.g. radio circuits).
The logger will become highly active at the time it is required to make measurements,
complete its leak evaluation and store the results as a set of data within its memory.
The logger will then go into standby until the next programmed event.
When it is time to upload the data over the mobile network, the logger switches on its
cellular radio circuits and sends its data. Once completed, it puts them back into
standby mode.
The logger occasionally checks if a user wishes to communicate with it; If so, it activates
its Bluetooth-compatible communications link. This link remains open for
communication for 2 minutes, waiting for instructions. If there is no interaction from the
user during this time, the logger puts the communications link back into standby. If the
user begins using the link, the logger completes any tasks the user gives to it, and keeps
the link open for 10 minutes after it was last used.
The logger’s primary task is a leak-sensing program, which runs once daily. The Leak-
state evaluation program takes place between 2-4am (although it can be changed).
Typically, it is made during a time of low water use to reduce the possibility of consumer
water use being incorrectly judged as a leak. During this time, if the logger determines a
change of leak-state, it carries out a secondary confirmation evaluation.
If the logger determines that a new leak is likely to be present near-by, it can (if so set)
automatically make a sound recording when the new leak is detected. The sound
recording is by default 10 seconds in duration.
Note: Making and transmitting sound recordings can use a lot of data and also drain
the battery significantly if too many are made. In order to preserve battery life

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and reduce data costs, the recording system is restricted to 7 recordings a
month. If you have a specific requirement for more than this limit, then please
contact HWM customer service for assistance.
2.2 SYSTEM OVERVIEW
The loggers form only a part of a functioning system. A typical system will comprise of:
•A set of PermaNET SU loggers.
These are set to evaluate the sounds within a pipe overnight, when water
use is minimal, to determine if a leak could be present nearby.
•A mobile device (with HWM software installed).
The mobile device provides a Graphical User Interface to the user, for access
to the loggers and on-line server.
•HWM application software (installed on the mobile device).
“IDT” software:
Used to put the logger into various modes in order to test it
within an installation.
At the time of writing, IDT interacts with the “HWM deployment app”
software; this must also be installed.
“Deployment App” software:
Used by IDT to record the location of the site at which the logger was
deployed.
•Required for apps:
oAn internet connection (via the mobile network),
oA User-account and password for the HWM DataGate system.
(required for the app to function and access the HWM database).
Note: Under certain conditions the above may not be required for the
IDT app (see section 2.4).
Note: The term “DataGate” will be used throughout this manual.
An alternative name may be used by the server in your location.
Note: Do not use the Windows-based version of IDT as it is not compatible with
PermaNET SU.

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2.3 MOBILE PHONE (OR SIMILAR DEVICE)
2.3.1 Specification
The HWM IDT app used for PermaNET SU is available on Android-based mobile devices.
Minimum specification of device:
Android: Android version 5 (Lollipop) minimum.
Must have Bluetooth-Low-Energy (BLE) compatibility, GPS and Internet
capability.
Memory (for application): 60MB
Memory (for data): (varies according to use).
2.3.2 Installing the HWM software (Android version)
The mobile device must be prepared for use with PermaNET SU loggers by installing the
HWM “IDT” mobile phone app.
On your Android device, open the
“Play-Store” application.
Search for “HWM global”.
A list of available HWM applications will be shown.
Select “IDT” and install it.
Once installed, an “IDT” icon will appear on the
phone.
“IDT” is the “Installation and Diagnostic Tool” for PermaNET SU.
Note: The IDT app employs the use of the “HWM Deployment App” for deployment
functions, so this must also be installed.
On your Android device, open the “Play-Store”
application, as detailed above.
Search for “HWM global”.
A list of available HWM applications will be shown.
Select “HWM Deployment App” and install it.
Once installed, an “HWM Deployment App” icon will
appear on the phone.
Note: The HWM Deployment app is only briefly described in this
user-guide. Further information can be found in the user-guide for the Deployment app.

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2.4 LOGGERS –SECURE VS INSECURE
Each logger has an internal setting that can be set to either “Secure” or “Insecure” mode.
“Secure” mode restricts (DataGate) unauthorised users from making changes to the
logger settings and or logged data. “Insecure” mode allows a logger to be used without
the (DataGate) authorisation requirement. A brief introduction to the two modes is
given here.
At the time of leaving the factory, the loggers will be pre-configured to the requirements
of the customer, including security settings. The loggers can communicate their security
requirements to the IDT app. This manual will refer to a logger as being either a “secure”
or “insecure” logger.
Secure loggers:
•Must be correctly registered on the DataGate server with appropriate ownership
settings.
•Require the IDT user to successfully authenticate with the server (periodically).
•Block connections from unauthorised IDT users.
Insecure loggers:
•Do not require registration on the DataGate server to be used with IDT.
•Can be connected to and modified by anyone with the IDT app.
•Allow the use of the loggers with alternative (non-DataGate) software for data
storage and display.
2.5 DATAGATE
Loggers set as “secure” require DataGate to operate. Loggers set as “Insecure” can
(optionally) operate without DataGate, or use an alternative server.
2.5.1 DataGate –Giving the App access to use Loggers
All secure PermaNET SU loggers must be correctly registered on DataGate in order for
IDT to use them. The IDT app will only allow access to secure loggers that the user has
permission to use; it also allows access to any insecure logger. Similarly, the
Deployment app will only allow access to a logger (secure or insecure) if it is correctly
registered on DataGate.
DataGate must be set to give the User of the app permission to use the loggers. An
example of how DataGate should be structured is given in section 8.1.
Note: If a logger does not appear on the app it does not imply that the logger is not
functioning correctly. Check with your system administrator that the logger
is correctly setup on DataGate for use with your user-account.

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2.5.2 DataGate –Terminology and Summary
This section introduces the terminology that is used by both DataGate and the apps…
The destination of all PermaNET SU logger data is the DataGate system, provided by
HWM. DataGate and PermaNETWeb web-pages are the main viewing portal for logger
and site data.
An overview of the scheme is summarised here…
PermaNET SU logger devices produce several forms of measurement data, each of
which can be considered as a data channel. The data represents a measurement made
by a logger deployed on the pipe network. Access to the pipe network is often available
through various chambers that house valves or hydrants, connected to the pipes. A
chamber can be used as an installation site for a logger. A site may be one of many in
an area or suburb, with the pipe network interconnecting them. Sites may therefore be
collected together in a group, often referred to as a District Metered Area (DMA). DMAs,
in turn may be collected together in a group, referred to as an account (or Zone). Each
of these separate entities may be represented on a database, such as one used by the
DataGate system, which links some of them to a User of the system.
Or, put in reverse order…
•DataGate contains a database.
•A User of Datagate can be linked with an account.
•An account can be a group of multiple DMAs.
•Each DMA can contain multiple sites.
•Each site can have one logger device installed at any given time (or none).
•Each logger device can produce multiple channels of measurement data.
•The data of a channel may consist of multiple samples that are obtained at
different times.
Details of initial setup of DataGate are provided (mainly for office staff) in section 8.
2.6 LOGGER MEASUREMENT DATA –DESTINATION AND USE
The loggers and the DataGate system together form a powerful leak detection system.
The data produced by each logger is uploaded to DataGate. DataGate links the
measurement data of each logger to the correct site.
DataGate web pages are mainly used for administration and setup. PermaNETWeb web
pages are mainly used for displaying sites, along with the measurement data provided
by the logger. The primary use within PermaNETWeb is to present loggers on a map
display, highlighting loggers that show possible pipe leaks.
When available, sound recording files can be used to confirm whether the sound within
a pipe does resemble the sound produced by a leak. Additionally, if several sites in the
area have loggers that have produced sound recordings at precisely the same time, the
approximate location of the suspect leak can often be found, using a process called
Leak Localisation / Correlation.
Note: Always use a ground microphone to confirm a leak location prior to
commencing repair works.

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2.7 WAYS TO SET THE LOGGER CONFIGURATION
The PermaNET SU holds many setting parameters that affect its operation (see 2.1).
Example settings are:
•When to make the Leak detection.
•Whether to automatically make a sound recording of a suspected leak.
•Scheduled measurements.
•When to call-in with the data.
•Mobile-network settings (e.g., telephone number, network to use).
The logger settings can be adjusted at various times…
•Initial settings are made within the factory, prior to shipping.
Default settings are used, plus some settings being customer-defined. These will
be suitable for most installations.
•The IDT app gives the user access to adjust some settings. The user has to be
near the logger to make the changes over the Bluetooth link.
•After installation, some additional settings can be modified remotely, via the unit
receiving commands from the DataGate system.
2.8 IDT –TEST OF LOGGER WITHIN AN INSTALLATION
The user of the IDT app can instruct the logger to do various maintenance tasks, such as
communications tests. This is particularly useful when done on-site since
communications are affected by the (often below-ground) location of installation, local
signal strength of the mobile network and the radio leakage properties of the chamber.
… The IDT app can help to find the best position for an antenna.
Note: IDT communicates with the logger over a Bluetooth-compatible radio link.
When the lid is on the chamber, this radio link is also adversely affected.
Hold the phone near the lid to improve the signal strength, or else the radio link
could be dropped.
2.9 OVERVIEW OF THE DEPLOYMENT PROCESS
The deployment process depends on the strategy employed by the water company.
There are two approaches:
•Deploy each logger to a site, with checks of functionality being made during each
installation. This confirms the logger performs OK in its installed position.
•Deploy the loggers to sites without any checks being made (i.e. skip some of the
steps listed as optional). A follow-up team is then sent to selected sites to
improve those that have communication problems.

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Installation consists of several steps…
•Installation sites must be selected.
•Equipment must be available at the installation site to complete the installation.
This will include an antenna. (A guide for the installation of the logger and
antenna choices is given later –see sections 3 and 6). It is possible that several
antenna configurations may need to be tried in order to get a good result. It is
useful to have a variety of antenna types to try.
•The user logs into IDT and synchronises with DataGate. This downloads
information regarding which loggers it has permission to use, and what sites are
already in existence.
•At site, a logger is selected for installation. The surface to which it will be
attached is prepared to ensure good contact. The surface must be flat so it
makes good contact; Sound will be picked up and also the logger will be secure
from falling off.
•The antenna is connected to the logger. The antenna location within the
chamber is then determined (this may need to be adjusted later; it is a trial-and-
error process).
•The logger has its Bluetooth-compatible radio temporarily activated.
•The IDT app needs to get the identity of the selected logger that is being
deployed.
There are two methods available in IDT to do this:
oThe user can scan the barcode on the side of the logger in order to obtain
its serial number, or
othe user can manually select the logger from a list of available loggers
that are being picked-up in a Bluetooth scan.
The first method is preferred as it reduces the possibility of error.
IDT will not progress with the deployment unless it can…
oFind the logger using the Bluetooth scan and
oCan verify it has permission to use it.
•(Optional). The user can test the leak-sensor if they wish. This function is
provided for troubleshooting, rather than installation.
•(Optional). The user can adjust some of the settings of the logger.
Alternatively, leave the logger settings in their factory-set configuration.
•(Optional). The user can (whilst the chamber lid is off) make a Call Test to
DataGate to verify internet connectivity settings are OK and that data can be
sent.
•(Optional). The lid of the chamber is closed (unfortunately, this degrades the
signal with the mobile phone network), and the power-level received from the
mobile network (CSQ level) is checked. If inadequate, adjustments need to be
made to the antenna position, or the type of antenna used, to find the best CSQ
level.
•(Optional). With the lid of the chamber closed (and positions finalised), a further
Test Call is made to confirm the logger can send and receive data.
(See section 6.2 and 6.3).
•The location of the site that the logger is deployed within is recorded by the app,
including any photographs that may be required.

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•The user leaves.
•The logger goes to into standby until it needs to make measurements or send in
measurement data.
•The deployment data is uploaded to DataGate during an app “Sync” process.
•DataGate is automatically prepared for receiving site measurement data from
the logger.

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3ANTENNA OPTIONS AND INSTALLATION GUIDELINES
3.1 ANTENNA OPTIONS
This section describes a variety of the antenna alternatives that can be supplied for use
with the PermaNET SU logger. Only use HWM-provided antenna for the logger, to
ensure the radio interface meets approvals requirements (i.e. safety).
3.1.1 Monopole
For most installations a monopole antenna will give acceptable performance.
Installation Considerations
•The antenna has a magnetic base to be used for mounting.
•For optimum performance the antenna requires a “ground plane”
(metal surface). Consider installing a metal bracket made of a
ferrous material to attach the magnetic base of the antenna, if
space allows.
•Install the antenna close to the surface in large underground
chambers.
•Ensure that the lid will not interfere with the antenna or cables
when being opened/closed.
•This antenna is vertically polarised, it should always be installed in
the vertical orientation.
•Never bend the radiating element of the antenna.
•The antenna can also be attached to an installation bracket
mounted to an existing marker post.
Illustration of installed logger and a
monopole antenna:

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3.1.2 T-Bar
This antenna should be mounted at the top of the chamber. (Two examples are shown).
T-Bar Installation Considerations
•Mount the antenna at the top of the chamber, but
spaced away from any metal lid.
•A bracket with magnetic mount is available to attach
the antenna to a metal lid and also provide a gap;
secure the antenna to the bracket using a tie-wrap.
•Avoid attaching the T-Bar directly to a metallic surface
as this can adversely affect signal strength and
performance, however it may be better than
underground.
•Certain chamber lids can be replaced with a plastic
version to which the T-Bar antenna can be mounted.
•Keep the antenna cable as short as possible, but
allowing for installation and removal of the lid without
damage or injury.
Illustration of installed logger and a T-bar antenna:
(2 alternatives shown: metal lid and a plastic replacement lid):

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3.1.3 Button
The button antenna is designed for mounting into chamber lids.
Button Antenna Installation Considerations
•The chamber lid is required to be drilled
out to accommodate the body of the
antenna.
•The top surface of the antenna needs to be a minimum of 0.5mm below the
surface of the lid to prevent damage.
•Drill through the lid to make a path for the cable and connector to pass through.
•Drill partially into the lid using a wider drill to make a suitable countersink or
recess that the body of the antenna can fit into. Check before drilling the recess
that the size shown in the diagram still applies (the antenna supplied may be of a
different size).
•Fasten the antenna using the nut supplied. A washer may be required.
•Once fitted, cover the top of the antenna with a resin epoxy such as “Marine
Goop”. Ensure all surfaces are clean and dry before applying the adhesive.
Follow the adhesive manufacturer’s instructions.
•Ensure the antenna cable does not become damaged (e.g. by the lid) during
installation and use.
Resin Epoxy 0.5mm thickness (min)
Washer
and Nut
Antenna

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Installation pictures:
Drill hole in lid to provide a recess for the
antenna body.
Thread antenna cable through hole,
washer and nut.
Secure antenna to the lid using the
washer and nut.
Apply a resin epoxy such as
Marine “Goop”, covering the
antenna to protect it.
Illustration of installed logger
and button antenna:

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3.1.4 Cone Antenna
This antenna should be mounted at the top of the chamber.
Cone Antenna Installation Considerations
•Mount the antenna at the top of the
chamber, but spaced away from any
metal lid.
•A magnetic mounting hook is available to
provide a gap. The antenna must be
attached to the hook and suspended as
shown.
•Keep the antenna cable as short as
possible, but allowing for installation and
removal of the lid without damage or
injury.
Illustration of installed logger and cone
antenna: