GREEN INSTRUMENTS G26 User manual

PART NUMBER.: 02892
G26 AMBIENT OIL MIST DETECTOR MANUAL

Content
2
Content
1INTRODUCTION 4
1.1 ABOUT THIS MANUAL 4
1.2 INQUIRIES AND FEEDBACK 5
1.3 ABOUT THE SYSTEM 5
1.3.1 System components 6
1.3.2 Additional components 6
1.4 CHOOSING THE RIGHT ALARM LEVELS –OPACITY OF OIL MIST 6
2SPECIFICATIONS 9
3INSTALLATION 11
3.1 GENERAL 11
3.1.1 Control at Delivery 12
3.1.2 Safety Aspects 12
3.1.3 Symbol identification 13
3.2 STANDARD INSTALLATION 13
3.2.1 Welding and Alignment Brackets 13
3.2.2 Transceiver and Reflector 15
3.2.3 Junction box 16
3.2.4 Control and Monitoring Unit 16
3.3 ELECTRICAL CONNECTIONS 16
3.3.1 Connections 16
3.3.2 Cable types 16
4MENU STRUCTURE &CONFIGURATION 17
4.1 TRANSCEIVER 17
4.1.1 Transceiver button function 17
4.1.2 Set laser aligning function 19
4.1.3 Set unit address 20
4.1.4 Save new settings 22
4.1.5 Enabling Service Mode 22
4.2 CONTROL AND MONITORING UNIT 25
4.2.1 Home menu 25
4.2.2 Sensor menu 26
4.2.3 Alarm list menu 27
4.2.4 Trend menu 31
4.2.5 Sensor Setup 31
4.2.6 System Setup 33

G26 Ambient Oil Mist Detector
Ver.1.9 – Revision July 2019 3
5CALIBRATION 35
5.1 ZERO CALIBRATION 35
5.2 AUTO SPAN CALIBRATION 35
5.3 MANUAL SPAN CALIBRATION 37
6COMMISSIONING 39
6.1 START OF THE SYSTEM 39
6.2 CALIBRATION 39
6.3 SETTING OF ALARM LEVELS 39
6.4 SETTING OF SIGNAL OUTPUTS 39
7MAINTENANCE 40
8TROUBLESHOOTING 41
9SPARE PARTS 42
10APPENDIX 44
10.1 MAINTENANCE INSTRUCTION 45
TABLE OF FIGURES
FIGURE 1-1: OPACITY VERSUS PATH LENGTH FOR DIFFERENT CONCENTRATION (CALCULATED FOR OIL
DROPLETS OF 10-20µM) 7
FIGURE 3-1: ILLUSTRATION OF A G26 AMBIENT OIL MIST DETECTOR WITH TRANSCEIVER/REFLECTOR UNIT 14
FIGURE 3-2: MOUNTING POSITION OF THE TRANSCEIVER AND THE REFLECTOR 14
FIGURE 3-3: INSTALLATION OF TRANSCEIVER 15
FIGURE 3-4: INSTALLATION OF REFLECTOR 15
FIGURE 4-1: TRANSCEIVER INTERFACE 17
FIGURE 4-2: ILLUSTRATION OF THE STRONGEST SIGNAL,NO OBSTRUCTIONS TO THE LIGHT BEAM 18
FIGURE 4-3: ILLUSTRATION OF THE WEAKEST SIGNAL,OBSTRUCTIONS TO THE LIGHT BEAM 18
FIGURE 4-4: ILLUSTRATION OF POOR ALIGNMENT 20
FIGURE 4-5: ILLUSTRATION OF GOOD ALIGNMENT 20
FIGURE 4-6: TRANSCEIVER ADDRESS SETTINGS 20
FIGURE 4-7: SYMPTOM OF ADDRESS CONFLICT 21
FIGURE 4-8: ACCIDENT ADDRESS CHANGE (2 SENSORS HAVE THE SAME ADDRESS) 21
FIGURE 4-9: THE ILLUSTRATION OF INTERFACE SHOW -ENTER TO SERVICE MODE 23
FIGURE 4-10: SERVICE MODE (FLASHING WARNING LED) 23
FIGURE 4-11: SERVICE MODE (1 SIGNAL STRENGTH LED REPRESENTS 10 MINUTES ADDED TO DEFAULT
SERVICE MODE TIMER) 24
FIGURE 4-12:THE SERVICE MODE TIMER INDICATION MAX 60 MINUTES 24
FIGURE 4-13: HOME MENU WITH 1CONFIGURED SENSOR 25
FIGURE 4-14: HOME MENU WITH 2CONFIGURED SENSORS 25
FIGURE 4-15: SENSOR MENU 26
FIGURE 4-16: ALARM LIST MENU 27
FIGURE 4-17: SELECT AN ALARM IN THE ALARM LIST MENU 27
FIGURE 4-18: ALARM INFO SCREEN -E.G.NOT ALIGNED ALARM 28
FIGURE 4-19: TREND MENU 31
FIGURE 4-20: PASSWORD POPUP WINDOW 31
FIGURE 4-21: SENSOR SETUP 32
FIGURE 4-22: SYSTEM SETUP 33
FIGURE 5-1: AUTO SPAN CALIBRATION READY TO START AFTER THE ZERO CALIBRATION IS COMPLETE (LEFT AND
RIGHT SIGNAL STRENGTH LEDS ILLUMINATED) 36
FIGURE 5-2: LASER BEAM HAS BEEN BLOCKED –AUTO SPAN CALIBRATION REGISTERING 36
FIGURE 5-3: AUTO SPAN CALIBRATION ACCEPTED –NOW UNBLOCK THE BEAM OF LIGHT 36
FIGURE 5-4: THE TRANSCEIVER IN NORMAL OPERATION MODE 37

Introduction
4
1 Introduction
1.1 About this Manual
This manual contains data and instructions for the installation, operation, and
maintenance of the G26 Ambient Oil Mist Detector.
The instructions are given in general terms and do not take into consideration a
specific installation. As such, the instruction manual is designed for the Ambient
Oil Mist Detector delivered by Green Instruments A/S.
Note that each Ambient Oil Mist Detecting System is configured at the factory ac-
cording to specifications. Therefore, please study this manual and the Technical
Drawings for each system in their entirety for the operation of the system.
The manual does not describe all possible situations, but only the most common
and known situations. It cannot replace the necessary education and training of the
personnel. Should situations not described in this manual occur that cannot be
solved in accordance with normal known practice and good workmanship, the op-
erator should contact Green Instruments A/S for instructions.
This manual does not claim to cover all details or variations in equipment or to
provide for every possible contingency that may arise during installation, opera-
tion, or maintenance.
Green Instruments A/S reserves the right to minor alterations and improvements
owing to developments without being obliged to enter the corresponding changes
in this manual.
Green Instruments A/S reserves the copyright of the manual. Without prior written
permission of Green Instruments A/S, the manual may not be copied and given to
unauthorized people.

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Ver.1.9 – Revision July 2019 5
1.2 Inquiries and Feedback
All claims and inquiries for spares shall be addressed to Green Instruments A/S.
In all correspondence or when ordering spare parts, please carefully state the
equipment type and serial number, which you can find on the label on the equip-
ment.
Green Instruments A/S appreciates all feedback and suggestions for improvement.
If you have any questions or find any errors in the manual, you are welcome to
contact us at the following address:
Green Instruments A/S
Erhvervsparken 29
DK-9700 Brønderslev
Denmark
Phone:
Fax:
[phone]
[phone]
E-mail:
Web:
[e-mail]
www.greeninstruments.com
1.3 About the System
The G26 Ambient Oil Mist Detector is designed to detect small concentrations of
oil mist in open spaces and provide an early fire hazard warning.
The system is usually installed in engine rooms, pump rooms, machinery loca-
tions and other rooms with hydraulic installations, especially above hydraulic
power packs and hydraulic aggregate pumps.
The G26 Ambient Oil Mist Detector uses a green laser light beam based on the
principle of light transmission. A light beam with specific spectral characteristics
is projected across the space to be monitored for oil mist leakage. The amount of
light reflected back to the instrument from the reflector after passing through the
space is compared with the maximum possible return when oil mist or smoke and
other matters are not present in the area. Thus, the level of return signal is an indi-
cation of oil mist or other particulate matters in the space attenuates the projected
light beam.
Please note that besides reacting to oil mist, the G26 Ambient Oil Mist Detector
also will react to other obstructions intercepting the light beam e.g. smoke and

Introduction
6
dust. Consequently, the reading will change and possibly trigger an alarm. De-
pending on the application, this might be perceived as a "false alarm". At the same
time, such alarms give you an indication of other malfunctions.
1.3.1 System components
As a standard configuration, the G26 Ambient Oil Mist Detector consists of the
following standard elements:
Control and Monitoring Unit (HMI)
The control and monitoring unit is arranged with a touchscreen, connection termi-
nals and cable glands. The control and monitoring unit can be configured to moni-
tor up to 2 transceivers.
Transceiver/Reflector Unit
The transceiver assembly contains the laser source, optical components, electron-
ics and data processer capacity to control and shape the laser beam projected
across to the reflector assembly. The reflector assembly reflects the light back to
the Transceiver Assembly where the light attenuation is measured.
The reflector assembly contains a precision reflector to direct the light beam back
to the transceiver assembly.
1.3.2 Additional components
Welding and alignment brackets for the transceiver and the reflector assem-
blies.
Junction Box (JB). For each transceiver, a junction box is arranged with con-
nection terminals and cable glands.
For system configured for more than 2 transceivers, another monitoring sys-
tem can be offered. Please contact our sales department for further infor-
mation.
1.4 Choosing the Right Alarm Levels – Opacity of Oil Mist
The alarm levels of the G26 Ambient Oil Mist Detector can be adjusted to specific
requirements. The variable output as well as the display of the monitoring unit
states the level of opacity in percent, i.e. how much of the light that does not reach
the receiver. The alarm point value is freely programmed from 2 % to 100 % to
suit the actual application. There will be a warning alarm at 50 % of the alarm
level, e.g. if the alarm is set at 10 % opacity, the warning will be at 5 % opacity.

G26 Ambient Oil Mist Detector
Ver.1.9 – Revision July 2019 7
The alarm level is used as the oil mist alarm while the warning at 50% of the
alarm level can be interpreted as a lens cleaning alarm.
Fouling of the transceiver lens and/or reflector will result in reduced translucency
between the transceiver and the reflector. The system cannot directly differentiate
between the opacity effect of the contaminated lens/reflector and the opacity ef-
fect of oil mist. Therefore, the transceiver lens and the reflector need to be cleaned
regularly. A failure to clean them will de facto lower the alarm level of the actual
oil mist alarm. If 4 % of the opacity between the transceiver and the reflector is
due to lens/reflector contamination then the actual oil-mist alarm will already be
triggered at 6 % opacity due to oil mist.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400
Path length in cm
Opacity in %
0.2 mg/l 1.0 mg/l 2.0 mg/l
2.5 mg/l 50 mg/l
Figure 1-1: Opacity versus path length for different concentration (calculated for oil drop-
lets of 10-20µm)
The alarm level of 10 % opacity can be chosen to trigger an alarm for oil mist
with a concentration of more than 0.2 mg/l.
In principle, the opacity of oil mist will depend on the concentration of oil mist,
the size of oil droplets, and the path length of the actual oil-mist cloud which in-
tersects the light beam.
Regarding the size of oil droplets, as a rule, smaller oil droplets have lower igni-
tion temperature due to the larger surface to volume ratio. Larger oil droplets are
less dangerous due to higher ignition temperatures. However, smaller droplets
have a higher opacity effect and are thus easier to detect than larger droplets.

Introduction
8
The default alarm levels for the G26 is based on the calculation for hazardous oil
mists including fine oil spray from minor leaks in hydraulic systems and oil mist
which has boiled off from a hot surface.
Regarding the concentration of oil mist and the path length, the figure above illus-
trates different oil mist opacity levels corresponding with different oil concentra-
tions and path lengths for the oil droplets ranging from 10-20 µm.
The figure shows that:
Even an oil mist cloud with a concentration of only 0.2 mg/l and the size of
approximately 2 meter will already trigger the 10 % alarm.
For the concentration of 2.5 mg/l (the maximum alarm level stated in IACS’s
M67, which is the standard for crank case oil mist detectors), a mist cloud in-
tersecting the line of sight by only 17 cm is enough to trigger the 10 % alarm.
For the threshold for the risk of oil mist fire/explosion – concentration of 50
mg/l, the G26 can detect a very small oil mist cloud intersecting the line of
sight by only 1 cm.
For smaller oil droplet size (3-10 µm), much smaller oil mist clouds will trigger
the alarm.

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Ver.1.9 – Revision July 2019 9
2 Specifications
Control and Monitoring Unit
Power supply Input Option 1: 100–240 VAC – 50/60 Hz – 1.4 A
Option 2: 20 - 30 VDC – 2 A
Ambient temperature 0°C – 55°C
Communication options:
(All included as standard)
Analog output:
2 x 4…20 mA max. 500 Ω - (active & linearized)
Digital output: 4 x Alarm Relays
Bus : Modbus TCP/IP
Alarm levels Alarm level is configurable
Warning level is automatic set at 50% of Alarm level
Alarm delay Default 0 s (programmable 0–1800 s)
Display Opacity level [%]
Accuracy ≤2 % of full scale
Dimensions/weight H×W×D: 300 × 200 × 150 mm / 5.5 kg
Enclosure IP 65 Steel box
Transceiver
Measurements Opacity
Measuring principle Transmission double pass
Measuring range 0 – 100% Opacity
Scanning distance 1.0 to 15.0 m
Power supply
24 VDC +/- 10%
Ambient temperature 0°C – 55°C (Class A)
Vibration Class B
EMC Class
A
Enclosure Class B/IP 66
Dimensions & weight LxHxW: 150x116x140 mm/1,7 kg
(incl.mounting brackets)

Specifications
10
Reflector
Ambient temperature 0°C – 55°C (Class A)
Humidity Above dew point
Vibration Class B
Enclosure Class B/IP 66
Dimensions & weight LxHxW: 52x116x140 mm/1,3 kg
(incl. mounting brackets)
Optional Equipment (refer to spare part section 9)
Support and alignment
brackets
Mild steel for welding. Used in case of mounting on
structures with thickness less than 6mm
Audit targets 100, 22 & 8 % Opacity (+/÷ 2% of full range)
Useable for field validation
Visualization, recorder and data logging (Upon request)
Remote digital display for panel mounting (Upon request)
Approvals and Certificates
Conform with European Directives;
DNV-GL and ABS Marine Type Approval
All certificates and declarations of conformity can be downloaded at Green Instruments
website: https://greeninstruments.com/downloads/certificates/

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Ver.1.9 – Revision July 2019 11
3 Installation
Read this chapter in its entirety before installing the system.
3.1 General
To avoid possible damage to the equipment or errors in the monitoring readings
and alarm function, it is important to observe the following points carefully:
The transceiver and reflector modules must be placed in areas with low vibra-
tion and with ambient temperatures below 55°C. The location must be suitable
for service and cleaning.
The alignment brackets must be secured to solid structures – typically bulk-
heads providing a vibration stable location for the transceiver and reflector as-
semblies. The transceiver and reflector must be properly aligned and mounted
firmly and stable, directly opposite each other.
If mounted on to structures thinner than 6 mm, it is recommended to fit a dou-
ble plate to the structure in order to support the Welding Brackets.
The transceiver and reflector must be protected against mechanical damage.
After the fine alignment of the transceiver and reflector, all bolts and screws
must be firmly secured and tightened. Please see Figure 3-1, Figure 3-2, Fig-
ure 3-3 & Figure 3-4 for installation of transceiver & reflector.
Caution
Installation and operation of the G26 Ambient Oil Mist Detector and associated equip-
ment must be carried out by skilled, trained and certified personnel. Green Instruments
A/S does not take any responsibility of the operation of the system and associated
equipment whatsoever.
The equipment must only be applied as specified by Green Instruments. If the equip-
ment is used in a manner not specified by Green Instruments, the protection provided
by the equipment may be impaired.
The successful and safe operation of this equipment is dependent upon proper han-
dling, installation, operation, and maintenance.

Installation
12
3.1.1 Control at Delivery
Upon receipt of the G26 Ambient Oil Mist Detector, please inspect and confirm
that the received items are in accordance with the packing list and not damaged.
Any discrepancy should be reported to the supplier immediately. If any of the re-
ceived parts are damaged, the shipping company should be informed and new
parts made available before completing the installation.
3.1.2 Safety Aspects
Warning!
Follow the installation and operating instructions. Please read the instructions
carefully in its entirety before working on the system.
Warning!
Hazardous Voltage: Disconnect power before servicing the system. Ignoring this
warning can result in severe personal injury or material damage. Observe the in-
structions carefully to ensure the correct connection of all power and signal leads.
Ensure that the correct power supply is connected to the control and monitoring
unit (see the rating marked on the label of the equipment).
Circuit breaker!
The installation must include a means of switching off electrical power by a clear-
ly marked switch or circuit breaker external to the control and monitoring unit.
The external switch or circuit breaker must be placed in close proximity to the
monitoring unit and within reach of the operator.
Overload protection!
To comply with safety requirements IEC 61010-1 (2003), the installation must in-
clude a means of overcurrent protection to protect against excessive energy being
drawn from the power supply system in case of a fault in the equipment.
Protective earth!
The monitoring unit must be connected to protective earth.
Installation and fault finding!
Electrical installation and fault finding on the system should only be undertaken
by a suitable trained and qualified engineer.
Warning Laser Hazard
Visible laser radiation! Avoid eye exposure to direct or scattered radiation.

G26 Ambient Oil Mist Detector
Ver.1.9 – Revision July 2019 13
3.1.3 Symbol identification
Caution, risk of danger
Caution, risk of electrical shock
Warning Laser Hazard. Visible laser radiation! Avoid eye exposure to direct or
scattered radiation.
Protective earth
The CE mark proves the compliance of the instrument with the requirements of
the relevant EU directives
3.2 Standard Installation
A G26 Ambient Oil Mist Detecting System can consist of up to 2 sensors (i.e.
transceiver/reflector units). Other systems configuration supporting up to 16 sen-
sors available upon request. The installation of each transceiver/reflector unit is
similar to each other. Figure 3-1 illustrates the installation of a system with a
transceiver/reflector unit.
The transceiver and reflector are to be mounted and aligned opposite each other in
a way that the light beam from the transceiver hits the reflector at the center. After
the fine adjustment of the transceiver and reflector alignment, all bolts and screws
must be firmly secured.
3.2.1 Welding and Alignment Brackets
The transceiver and reflector are installed into solid brackets, i.e. the alignment
brackets mounted on the welding brackets, see Figure 3-2.
The solid mild steel welding brackets allow easy mounting to existing structures
by welding or alternatively bolting. Please note that thin structures will require
additional support in order to secure stable alignment of the Transceiver and Re-
flector Assemblies.
In order to avoid false alarms caused by people walking in the monitoring area, it
is recommended to mount the transceiver and reflector at a position higher than
the normal height of people (i.e. > 2200 mm from the floor) if possible.

Installation
14
Figure 3-1: Illustration of a G26 Ambient Oil Mist Detector with transceiver/reflector unit
Figure 3-2: Mounting position of the transceiver and the reflector

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Ver.1.9 – Revision July 2019 15
3.2.2 Transceiver and Reflector
The transceiver and reflector are mounted into the alignment brackets as illustrat-
ed in Figure 3-3 and Figure 3-4.
Special attention must be given to the alignment, ensuring the transceiver and re-
flector is mounted precisely centered and directly opposite each other.
Figure 3-3: Installation of transceiver
Figure 3-4: Installation of reflector

Installation
16
3.2.3 Junction box
The junction box is an optional item used in cases where the cable between the
Control and Monitor unit and the Transceiver exceeds 15 meters and/or in cases
where multiple transceivers are daisy chained together. If the scope of supply in-
cludes a junction box, the junction box is pre-mounted with a connection cable for
easy connection to the transceiver.
The connection terminals are located in the junction box. Four (4) cable glands
(M20) are arranged for incoming and outgoing power and data cables. The M20
cable glands are suitable for cable diameters between 7 mm to 13 mm.
3.2.4 Control and Monitoring Unit
The control and monitoring unit can interface with up to 2 transceiver/reflector
units. Other systems configuration supporting up to 16 sensors available upon re-
quest. It is recommended to install the control and monitoring unit in an easily ac-
cessible location.
The control and monitoring unit is arranged with touch screen and connection
terminals inside the unit. Five (5) cable glands (M20) are arranged for incoming
and outgoing power and data cables. The M20 cable glands are suitable for cable
diameters between 7 mm to 13 mm.
3.3 Electrical Connections
3.3.1 Connections
Before connecting the power supply, please make sure that the power supply rat-
ing for the control and monitoring unit corresponds with the power supply availa-
ble.
Please see the electrical drawings relevant for installation attached to each system.
The system can be prepared for functions not relevant for all installations. These
functions will be marked as spare or as reserved for a specific purpose.
3.3.2 Cable types
Refer to electrical documentation.

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Ver.1.9 – Revision July 2019 17
4 Menu structure &
Configuration
4.1 Transceiver
4.1.1 Transceiver button function
Figure 4-1: Transceiver Interface
The transceiver user interface consists of a green power LED, a yellow warning
LED and a red alarm LED, a zero and a span button, and 5 signal strength LEDs.
Power: Green illuminating LED means power ON
Warning: Yellow illuminating LED means Warning ON
Alarm: Red illuminating LED means Alarm ON
Signal Strength LEDs: Under normal operation, the signal strength LEDs in-
dicate how strong the light beam is reflected back to the transceiver. When the
first signal strength LED on the right illuminates, it indicates the transceiver is
receiving the strongest signal back, i.e. the section between the transceiver and
the reflector is transparent with no obstructions to the light beam and the
transceiver lens and the reflector are clean. Please see Figure 4-2.

Menu structure & Configuration
18
Figure 4-2: Illustration of the strongest signal, no obstructions to the light beam
When the illumination changes to one of the LEDs to the left, it indicates that
the reflecting beam becomes weaker, i.e. the beam is scattered or blocked, or
the transceiver lens and/or reflector become contaminated. When the illumina-
tion changes to the last LED to the left, it means the opacity level is just above
the warning level. Thus, the signal strength illumination can give a quick indi-
cation on the opacity level and/or the contamination level of the transceiver
lens and/or the reflector. Please see Figure 4-3.
Figure 4-3: Illustration of the weakest signal, obstructions to the light beam
Beside the indication of signal strength, the blue LEDs are also used for indi-
cation in connection with initial alignment and address settings.
Zero and Span: The Zero and Span buttons are used for calibration and initial
settings of light beam strength and transceiver address. Note that during initial
setting of the light beam strength, the laser light will be steady providing good
access for fine alignment of the beam against the reflector.

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Ver.1.9 – Revision July 2019 19
4.1.2 Set laser aligning function
Warning
Once you start laser aligning function (section 4.1.2), you need to continue
with setting unit address (section 4.1.3) until the new settings are saved (sec-
tion 4.1.4).
Visible laser radiation! When the transceiver operates in pulsed mode, the laser
is classified as Class 1, which is safe under all conditions of normal use. When
it operates in the continuous mode (i.e. there is a steady light beam in the
aligning mode), the laser is classified as Class 3R. Thus, please avoid eye
exposure to direct or scattered radiation when the transceiver operates in the
continuous mode.
During laser aligning step, all possible obstructions to the light beam (such as
oil mist, smoke and dust) must be absent in the section between the transceiver
and the reflector.
To enter laser alignment mode please press and hold SPAN and ZERO buttons
and wait approximately 5 seconds until all signal strength LEDs turn ON. Then
release SPAN and ZERO.
The signal strength is indicated by means of one of the blue LEDs. Note that
alarm and warning function will be deactivated, while the steady/continuous beam
of light is ON.
The laser beam can now be adjusted to hit the centre of the reflector by adjusting
the support and alignment bracket.
For centring the laser beam, it is recommended to place a paper or a thin card-
board over the reflector. The beam will be projected onto the paper or cardboard,
and the position of the beam will be clearly indicated for fine adjustment to the
centre of the reflector.
A cut-off shape which is not centred nicely onto the reflector indicates a poor
alignment (Figure 4-4). A circular shape nicely centred onto the reflector indicates
a good alignment (Figure 4-5).

Menu structure & Configuration
20
Figure 4-4: Illustration of poor alignment Figure 4-5: Illustration of good alignment
After the fine adjustment, the beam to the centre of the reflector, tighten all the
bolts and screws on the alignment brackets. Remove the paper or the cardboard
used.
Go to the next step – set unit address.
4.1.3 Set unit address
Press and hold SPAN and ZERO buttons and wait approximately 5 seconds until
all signal strength LEDs turn ON. Laser is OFF (it might flash a few times before
turning off). The unit address is now shown on the signal strength LEDs as de-
scribed in Figure 4-6.
Address 1
Address 2
Figure 4-6: Transceiver address settings
Signal Strength LED
OFF OFF OFF OFF ON
OFF OFF OFF ON OFF