Thermo Scientific Odalog G20 User manual

Odalog G20 and G20 RTX
User Manual
XXXXXX • Revision A • November 2021

This document is confidential and is the property of Thermo Fisher Scientific. It may not be copied or
reproduced in any way without the express written consent of Thermo Fisher Scientific.
Thermo Fisher reserves the right to make changes to the product and this document without notice.
© 2021 Thermo Fisher Scientific Inc. All rights reserved

Contents
Models......................................................................... 1
Safety Precautions....................................................... 2
FCC ......................................................................... 2
EMC......................................................................... 2
Odalog G20 Gas Logger .......................................... 2
Alert Signals ............................................................. 2
Odalog G20 RTX Gas Logger-Alert Signals .............. 4
Unpacking ................................................................... 6
Packing List ............................................................. 6
Introduction ................................................................. 7
Odalog G20 Gas Logger .......................................... 7
Odalog G20 RTX Gas Logger................................... 7
General Specifications ................................................. 8
Operation..................................................................... 10
Odalog G20 screens ................................................ 10
Odalog G20 RTX screens......................................... 15
Modem and SMS..................................................... 20
PC Software-Odastat NX ............................................. 21
Home Screen........................................................... 21
Select Connection Screen.....................................22
Bluetooth Communication screen .........................23
Login Screen.........................................................26
Set Date and Time Screen ....................................27
Instrument Parameters..........................................28
Download Log Screen........................................... 32

Chart Screen.........................................................35
Connect to FTP server ..........................................37
Online Parameters................................................. 39
File Preferences ....................................................39
Firmware Updater .................................................40
Change Admin Password...................................... 40
Recommended Deployment ........................................ 41
Signal Strength......................................................... 41
Maintenance ................................................................ 42
Filter Replacement for G20 and G20 RTX................. 42
Sensor Calibration.................................................... 43
Null Mode .............................................................43
Span Mode ........................................................... 43
Calibrating the Odalog ................................................. 44
Digital Sensor Error Log ........................................... 44
Contact Information ..................................................... 45

OdaLog Portable Gas Loggers Models | 1
Models
Table 1 shows the units covered in this User manual.The Gas
Loggers are portable gas monitoring devices capable of
logging poisonous gases in the most harsh environments.
.
Table 1. Applicable Models
Model Range Part Number Resolution Communications
Odalog™ G20 Gas Logger
0-200 ppm Odalog-G20-H2S-200 0.1 ppm Modbus and Bluetooth
0-2000 ppm Odalog-G20-H2S-
2000 1 ppm Modbus and Bluetooth
Odalog™ G20 RTX
Wireless Gas Logger
0-200 ppm Odalog-G20-RTX
H2S-200 0.1 ppm Modbus, Bluetooth, 4G
0-2000 ppm Odalog-G20 RTX-
H2S-2000 1 ppm Modbus, Bluetooth, 4G

2 | Safety Precautions OdaLog Portable Gas Loggers
Safety Precautions
FCC
This device complies with Part 15 of the FCC Rules and with
Innovation, Science and Economic Development Canada’s
licence-exempt RSS(s). Operation is subject to the following
two conditions:
1. This device may not cause interference; and
2. This device must accept any interference, including
interference that may cause undesired operation of the
device.
L’émetteur/récepteur exempt de licence contenu dans le
présent appareil est conforme aux CNR d’Innovation,
Sciences et Développement économique Canada applicables
aux appareils radio exempts de licence. L’exploitation est
autorisée aux deux conditions suivantes :
1. L’appareil ne doit pas produire de brouillage;
2. L’appareil doit accepter tout brouillage radioélectrique
subi, même si le brouillage est susceptible d’en
compromettre le fonctionnement.
This equipment has been tested and found to comply with the
limits for a Class A digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is
operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and,
if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the
user will be required to correct the interference at his own
expense.
EMC
ICES-003 statement: Class A CAN ICES-003 (A) / NMB-003
(A)
This equipment complies with the FCC and ISED Canada
radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and
operated with a minimum distance of 20 cm between the
radiator and all persons during normal operation.
Odalog G20 Gas Logger
As the user of the product, it is your responsibility to
understand the proper function and operational
characteristics of the loggers. This User manual should be
thoroughly read and all operators given adequate training
before attempting to place the loggers in service. Awareness
of the stated cautions and warnings, and compliance with
recommended operating parameters together with
maintenance requirements are important for safe and
satisfactory operation. The unit should be used for its
intended application; alterations or modifications will void the
Warranty.
Alert Signals
WARNING: Any changes or modifications not
expressively approved by the grantee could void
the user's authority to operate this equipment.
Do not use solvents to clean the Odalog gas
logger. (a damp cloth will suffice)
Do not insert objects (including finger) into gas
inlet as the filter may be damaged.
Do not attempt to disassemble sensors as they
are potentially corrosive.
The use of lithium batteries other than the lithium
batteries listed in Table 4 will invalidate the
intrinsic safety approval.
Before each day’s use, sensitivity must be tested
on a known concentration of test gas (to match
the sensor type) equivalent to 20-50 percent of
full-scale concentration. Accuracy must be within
±10% of actual concentration or ±5% of full
scale. accuracy may be corrected by calibration
as described in the “calibrating the Odalog”
section.
The Odalog gas logger is not designed to
operate as a safety device. When entering
confined spaces and toxic hazard environments
all appropriate regulations and occupational
health and safety precautions should be strictly
adhered to. If unsure of potential hazards or
safety standards, seek advice from your
workplace occupation health and safety
department or government regulatory body.

OdaLog Portable Gas Loggers Safety Precautions | 3
The ambient temperature range that the
apparatus is suitable for is -20°c to +50°C.
“EX” CERTIFICATION is valid only to 21% VOL
oxygen. The Odalog gas logger should not be
used in oxygen enriched atmospheres.
Battery shall not be removed or replaced by user
for any maintenance. Contact manufacturer /
authorized distributor.
Only touch the instrument with an insulating
object.
To avoid build-up of electrostatic charge, the
instrument shall be used or placed where it will
be protected from inadvertent rubbing and shall
only be cleaned or wiped with a damp cloth
when used in explosive atmospheres.
Only use the micro-SD card that is provided or
recommended by the manufacturer.
The enclosure shall only be disassembled in the
non-hazardous area.
The following parameters shall be taken into
account during interconnection in a system:
Odalog G20 Entity Parameters at Connector
CN6
Uo 3.9 V
Io 275 mA
Lo 55.77 µH
Co 22 µF
Ui 3.7 V
Pi 206 mW
Ci 181µF
Li 20.2 µH
The maximum external capacitance and
maximum external inductance of the circuits
connected at CN6 have been additionally
assessed for spark ignition compliance with
resistive current limiting circuits at elevated
voltages and currents and found to be compliant
as follows:
U 7.6 V
I 480 mA
Co 203 µF
Lo 75.9 µH

4 | Safety Precautions OdaLog Portable Gas Loggers
Odalog G20 RTX Gas Logger-Alert Signals
This instrument transmits radio frequencies
(2 g/3 g/wifi*), ensure all safety precautions are
observed (depending on model). A separation
distance of at least 20 cm must be maintained
between the modem transmitter’s antenna and
the body of the user or nearby persons.
Disable communications when instrument is
being transported via aeroplane.
LITHIUM BATTERY SAFETY:
a. This instrument uses lithium battery. All
safety and handling precautions must be
observed (lithium contained = approx. 3.9
grams per D-size LSH20 high current
battery). If dangerous good transport may
apply in your locality, remove the battery for
transport if dangerous.
(goods suitable for shipping methods are not
available)
b. Avoid moisture contact with lithium batteries,
may cause damage/explosion.
c. Do not attempt to disassemble instrument
that shows signs of battery damage inside
instrument.
d. Only use with manufacturer approved lithium
battery types.
(see 'instrument specifications' for list of
approved batteries)
e. Observe battery manufacturer's guidance on
disposal.
f. Battery handling/shipping, safety and
disposal information is available from
manufacture or contact distributor for
information.
This instrument is not ‘intrinsically safe’ and
should not be used in potentially flammable or
oxygen enriched atmospheres.
Do not use solvents to clean the instrument.
(a damp cloth will suffice).
The apparatus is suitable for ambient
temperature range of -20°C to +50°C.
Install and secure wiring (and excess wiring)
attached to this instrument in accordance with
workplace health and safety regulations of the
installation site.
It is recommended that the instrument be
installed out of direct sunlight. (sheltered)
Service and/or repair work on this instrument
must only be carried out by authorized service
technicians. Return instrument to authorized
service agent/distributor for any internal
maintenance (other than changing SD card and
Sim card).
If using a custom external antenna, ensure
manufactures safety precautions are adhered to.
Long-term exposure to temperature or humidity
levels outside the instrument range may result in
damage to the sensor and inaccurate data.
The Odalog gas logger is not designed to
operate as a safety device, and should not be
used for confined space entry or hazardous area
monitoring.
Do not insert objects (including finger) into gas
inlet as the filter may be damaged.
Do not attempt to disassemble sensors as they
are potentially corrosive.

OdaLog Portable Gas Loggers Safety Precautions | 5
Before each deployment, sensitivity must be
tested on a known concentration of test gas (to
match the sensor type) equivalent to 20-50
percent of full-scale concentration. Accuracy
must be within ±10% of actual concentration or
±5% of full scale. Accuracy may be corrected by
calibration (refer to user manual for calibration). It
is recommended that a gas check be performed
after deployment as well, so that accuracy of
logged data can be checked.
(and corrected if necessary in the software.)
Battery shall not be removed or replaced by user
for any maintenance. Contact manufacturer /
authorized distributor.
Only touch the instrument with an insulating
object.
To avoid build-up of electrostatic charge, the
instrument shall be used or placed where it will
be protected from inadvertent rubbing and shall
only be cleaned or wiped with a damp cloth
when used in explosive atmospheres.
Only use the micro-SD card that is provided or
recommended by the manufacturer.
The enclosure shall only be disassembled in the
non-hazardous area.
The following parameters shall be taken into
account during interconnection in a system:
Odalog G20 RTX Entity Parameters at Connector
CN6:
Uo 3.9 V
Io 275 mA
Lo 55.77 µH
Co 22 µF
Ui 3.7 V
Pi 206 mW
Ci 181 µF
Li 17 µH
The maximum external capacitance and
maximum external inductance of the circuits
connected at CN6 have been additionally
assessed for spark ignition compliance with
resistive current limiting circuits at elevated
voltages and currents and found to be compliant
as follows:
U 7.6 V
I 518 mA
Co 203 µF
Lo 73 µH

6 | Unpacking OdaLog Portable Gas Loggers
Unpacking
At delivery, examine the exterior for physical damage while
the carrier’s representative is present. If exterior damage is
present, carefully unpack and inspect the unit and all
accessories for damage.
If there is no exterior damage, unpack and inspect the
equipment within five days of delivery. If you find any damage,
keep the packing materials and immediately report the
damage to the carrier.
Do not return goods to the manufacturer without
written authorization.
When submitting a claim for shipping damage, request that
the carrier inspect the shipping container and equipment.
Packing List
Along with the unit, following things will be packed:
•Antenna-RTX only
•USB cable
•Grease (1 bottle)
•Magnetic Hex Screwdriver
•Calibration Adapter

OdaLog Portable Gas Loggers Introduction | 7
Introduction
The Odalog is a compact portable gas data-logger designed
for harsh environments, such as the waste water industry.
With superior sealing and use of heavy duty materials, this
instrument is corrosion-resistant, durable and reliable.
Odalog G20 Gas Logger
Odalog G20 is low power logger which is coupled with a long-
life lithium cell power-source and battery life is exceeded 12
months in most cases.
New and faster Bluetooth and wireless communication, as
well as Modbus communication enables the Odalog to be
easily calibrated, configured and the download of logged data
without the need for any disassembly.
The extra large, easy to read LCD makes the Odalog simple
to use and interpret instrument data and settings on-site. The
instrument main features can be viewed on-screen, such as:
gas readings, temperature, humidity, % of memory used,
logging mode and time intervals, as well as a battery level
indicator.
Odalog interfaces with, easy to use software package that
brings logged data into the office environment in a user-
friendly format.
Figure 1. Odalog G20 Gas Logger
Odalog G20 RTX Gas
Logger
The new generation Odalog G20 RTX design is based upon
the acclaimed Odalog G20, and takes all the features from its
respected predecessor, adding new wireless data
transmission and extended battery life to its already-
impressive repertoire. With low power consumption coupled
with a long-life Lithium D-cell power-source, battery life will
exceed 12 months in most cases.
Wireless communication (Bluetooth, 4G Modem, Modbus), as
well as magnetic switches enables the Odalog to be easily
calibrated, configured and the download of logged data
without the need for any disassembly. The extra large, easy to
read LCD makes the Odalog simple to use and interpret
instrument data and settings on-site. The instrument main
features can be viewed on-screen, such as: gas readings,
temperature, humidity, % of memory used, logging mode and
time intervals, as well as a battery level indicator.
The Odalog G20 RTX gas monitoring system utilizes a GSM /
GPRS Modem to transmit real time gas concentration data to
a dedicated Internet (FTPS) server that is remotely accessible
using a PC based software application (Odastat NX).
The new Odalog G20 RTX instruments are able to be fitted
with a range of gas sensors and are programmed to transmit
gas concentration, battery voltage and temperature
measurements at time intervals selectable by the user and
main settings can be changed remotely.
The transmitted data is stored on the FTPS server in coded
binary files that can be downloaded using a PC based
application, Odastat NX.
Figure 2. Odalog G20 RTX Gas Logger

8 | General Specifications OdaLog Portable Gas Loggers
General Specifications
Storage of the Odalog instrument, with sensors fitted, should be limited to the temperature range of 0°C (32°F) to 25°C (75°F),
and between 20% to 80% RH.
Note: STP = Standard Temperature and Pressure: 20°C (68°F) @ absolute pressure 101.3 kPa (14.7 psi).
.
Table 2. General Product Specifications
Specification Odalog G20 Odalog G20 RTX
Operating temperature -20°C (-4°F) to 50°C (122°F)
Instrument Relative
Humidity Range 5-95% RH
Ingress Protection IP66/68 (1 m / 2 hr)
External Dimensions (DxH) 76.5 mm (3.01”) x 175 mm (6.89”)
Instrument Weight
Power Supply(s) Primary D-Size Lithium Battery (see Table 4)
Battery Life/ Run Time Greater than 12 months
(for life of Lithium battery)
Greater than 8 months
(depends on signal strength and server
transmission interval)
Data Logging Capacity More than 10 million data points
Memory Micro SD card 8 GB Scandisk (SDSDQAF3-008G-XI)
Logging Interval Selectable from 1 minute to 1 hour
Transmission Interval N/A Selectable from 30 min to 24 hr
Communication Module USB, Bluetooth, Modbus USB, Bluetooth, Modbus, 4G
Tri-Band Antenna N/A
Water-proof (IP68)
Antenna specs
Frequency: 698-960 MHz / 1710-2710 MHz /
2500-2700 MHz
Dimensions:163 mm (6.41”) X 21.5 mm (0.85”)
Table 3. Calibration Gas & Flow Times for G20 and G20 RTX loggers
Gas Model / Range Recommended
gas level
Minimum Flow Rate
(ml/min) Gas flow time
Hydrogen Sulphide (H2S) 0-200 ppm 50 ppm 250-500 15 min.
Hydrogen Sulphide (H2S) 0-2000 ppm 100 ppm 250-500 15 min.

OdaLog Portable Gas Loggers General Specifications | 9
Note: Only the battery types in Table 4 can be used.
Table 4. Battery Specifications
Model Battery Type Size Quantity Model
G20 RTX Lithium D 1 LSH20
G20 Lithium D 1 LS33600
Table 5. Technical Specifications-Digital Sensor
Measurement Value
Operating Principle Electrochemical
Target Gas H2S
Accuracy ±5% of measuring value
T50* Response Time <15 seconds
T90* Response Time <30 seconds
Output ppm compensated for temperature
Sensor Warm Up Time 20 seconds
Overload (maximum concentration that can be
reached before damaging the sensor) 1000 ppm
Recovery Time
from 200 ppm to < 4 ppm <180 seconds
Linearity* Linear (±5% from linear, up to 200 ppm)
Measurement Interval 1 min
Resolution 0.1 ppm
Baseline Offset* <±0.5 ppm H2S equivalent
Equilibrium Baseline Shift from -40°C to +60°C <±3 ppm
Repeatability* ±5% of measured value
Orientation Sensitivity None
Serial Communication USB with Chip Select

10 | Operation OdaLog Portable Gas Loggers
Operation
Odalog G20 screens
This section describes a brief operating procedure for the
Odalog instrument G20, covering the basics of all major
functionality.
Switching On
Figure 3. Switching On
Hold the Magnet next to the Menu. “OFF” will count down to
ON 3-2-1. Remove the magnet when the “display” screen
appears.
LCD Layout Overview
Figure 4. LCD Layout Display
Following are the different parameters displayed on the LCD
of the Odalog loggers:
1. Lower 7-segment characters: Displays gas readings
and status values which are usually numerical digits,
some supplemental menu headings and prompts.
2. Upper 14-segment characters: Displays menu
headings, prompts and other visual feedback which are
usually alphabetic characters, some numerical values
displayed on some screens.
3. Battery Level Indicator – Displays the battery levels, 4
Stage Depletion.
Figure 5. 4 Battery Stage Depletion
P1, P2, P3 are the Segments to display the battery
percentage as shown in Figure 5. Displaying battery
percentage is common for all screens.
4. Communications Symbol - This symbol indicates if the
instrument is successfully connected and transferring
data.
•On the INST screen: Symbol indicates the
approximate “signal strength” of the last transmission
to the internet server.
5. Logging Symbol – This symbol flashing indicates that
the instrument is Logging.
Note: Flashing interval does not indicate logging interval.
6. % - This symbol is used to show any units or screens
that display units as a percentage (e.g. Memory usage,
some gas types are displayed % Volume).
7. Temperature units – These symbols indicate the
temperature readings on screen in degrees Centigrade or
Fahrenheit, depending on the setting chosen in the
Odastat NX software package [Default = º C].
8. Gas Reading units – These symbols indicate if gas
readings shown are in “parts per million” or “parts per
billion”. [‘ppb’ is disabled in Odalog Logger G20 and G20
RTX series instruments].
8.8:8.8 8.8:8.8
ON 3 ON 2
ON 1 888888
8.8:8.8
888888
8.8:8.8
OFF
HOLD HOLD
HOLD
HOLD HOLD
LOGGING
%
°C
°F
ppb
ppm
%
°C
°F
ppb
ppm
Move
the
magnet
888888
8.8:8.8
LOGGING
%
°C
°F
ppb
ppm
1
2
3
45
6
7
8

OdaLog Portable Gas Loggers Operation | 11
Main Menu
•
•
•
•
•
•
•
•
•
•
•
Figure 6. Main Menu Screens
•INST: This screen displays the instantaneous gas reading
in ppm (parts per million) units. If the Transmit mode is
ON, this screen indicates whether the data is logging or
not. It will display transmitting symbol
to indicate that the transmit mode is ON.
•STATUS: This screen scrolls through overview of
Instrument data.
•START LOG: This screen enables logging the data. This
is confirmed by LOGGING symbol
which flashes on screen.
•USB: This screen enables USB (Universal Asynchronous
Receiver-Transmitter) link for communicating with the
Odalog instrument.
•Bluetooth: This screen enables Bluetooth Low Energy
(BLE) link for communicating with the Odalog instrument.
•NULL: This screen is used to reset the device to “NULL”
during calibration. Transmit Mode should be turned off
prior to calibration, as any transmissions to the server will
cause any NULL or SPAN screens to be cancelled.
•SPAN: This screen tests the sensor with gas.
•OFF: This screen enables turning off the instrument. Hold
the Magnet next to the Menu and wait until the display
counts down from “OFF2” to “OFF”. Then, release
button.
When the button is correctly released to turn the
instrument off, the OFF title will shift 1 character to the
right to confirm that the instrument is now in the off state.
Start / Stop Log
Figure 7. Start / Stop Log Screens
Start / Stop Log functions are used to enable / disable the
instrument to log the data.
Hold the Magnet next to the Menu and remove the magnet
when the “START LOG” screen appears.The LOGGING
symbol on screen will now start flashing.
Hold the Magnet next to the Menu and remove the magnet
when the “STOP LOG” screen appears. Use the magnet tool
near ‘Y’ to stop logging the data.
Clear Log
Figure 8. Clear Log Screen
Hold the Magnet next to the Menu until “CLEAR LOG” is
displayed and then release. Use the magnet tool near ‘Y’ to
turn off the transmission.
STATUS START
LOG
INST
0.0ppm
HOLD HOLD
UART BLE NULL
HOLD HOLD
HOLD
SPAN OFF
OFF 2, OFF 1
OFF
HOLD
Move
the
magnet
HOLD
LO GGING
STATUS START
LOG
INST
0.0ppm
HOLD
LOGGING
Move
the
magnet
STATUS STOP
LOG
HOLD
LOGGING
LOGGING LOGGING
Y N
LOGGING
Swipe
the
magnet
near ‘Y’
Move
the
magnet
DONE
LO GGING
ON 3 ON 2
ON 1 888888
8.8:8.8
888888
8.8:8.8
OFF
HOLD HOLD
HOLD
HOLD HOLD
LOGGING
%
°C
°F
ppb
ppm
UART BLE CLEAR
LOG
HOLD HOLD
%
°C
°F
ppb
ppm
HOLD
Move
the
magnet

12 | Operation OdaLog Portable Gas Loggers
Status
Figure 9. Status Screens
•Odalog L2: This screen displays the variant
(G20 or G20 RTX) of Odalog G20 series.
•SWVER:his screen displays the Firmware version
number.
•PEAK: This screen displays gas level in ppm after Start
Log function.
•CLOCK: This screen displays (shown in 24-hour) time. If
clock is not set, this value may be incorrect on screen
and in instrument log – This must be set in the Odastat
NX Software.
•TEMP: This screen displays temperature (in Degrees
Fahrenheit / Celsius – depending on default units
selected in software).
•BATTERY: This screen displays battery level of the
Instrument.
•MEMORY: This screen displays the amount of local
memory available in GB.
•TYPE OnCE: This screen displays the type of logging
data.
•SECOND: This screen displays the logging interval i.e.
time between gas readings displayed as “SECONDS”
(set in the Odastat NX software).
•CALGAS: This screen displays the Calibration Gas Level
in ppm as set via the Odastat NX software package.
• DUEEOL: This screen displays No of days for sensor
end of life.
• DUECAL: This screen displays No of days for sensor
recalibration.
•MODBUS: This screen displays the status of the
communication. It is 0 when the instrument is not
connected to the software and 1 when the instrument is
connected through ModBus.
•BPS: This screen displays the data transmission speed
from the instrument to the Odastat NX software
calculated in bits per second.
•HUMD: This screen displays the internal humidity level
when the instrument is in the field.
SWVER
12.0.1
PEAK
0.0ppm
CLOCK
11:34
TEMP
16.2
BATTERY
3.503
°C
MEMORY
7GB
TYPE
OnCE
SECOND
900
CALGAS
33.0 ppm
DUEEOL
1670
DUECAL
239
MODBUS
0bPS
HUMD
66.9
ODALOG
-L2-
INST
0.0ppm

OdaLog Portable Gas Loggers Operation | 13
Bluetooth On / Off
Figure 10. Bluetooth On / Off Screens
Bluetooth Low Energy (BLE) is a low power wireless
communication technology that can be used over a short
distance to enable smart devices to communicate. In Odalog
G20, it enables instrument to communicate with the
Odastat NX software.
Hold the Magnet next to the Menu and remove the magnet
when the “BLE” screen appears. Use the magnet tool near for
‘Y’ in the “COMSTR (Communication Start)” screen to turn on
the transmission through Bluetooth.
The symbol flashes on the screen indicating
communication through Bluetooth is on.
Hold the Magnet next to the Menu and remove the magnet
when the “BLE” screen appears. Use the magnet tool near ‘Y’
in the “COMSTP (Communication Stop)” screen to turn off the
transmission.
USB On / Off
Figure 11. USB On / Off Screens
Universal Serial Bus (USB) is an industry standard that
establishes communication and power supply (interfacing)
between computers, peripherals and other computers. In
Odalog G20, it transfers data between the instrument and
the Odastat NX software. The device is the transmission line
and the software is the receiving line.
Hold the Magnet next to the Menu and remove the magnet
when the “USB” screen appears. Use the magnet tool near
‘Y’ in the “COMSTR (Communication Start)” screen to turn on
the transmission through USB. The symbol flashes on
the screen indicating communication through USB is on.
Hold the Magnet next to the Menu and remove the magnet
when the “USB” screen appears. Use the magnet tool near
‘Y’ in the “COMSTP (Communication Stop)” screen to turn off
the transmission.
COMSTR
y n
DONE
OODO 1
Swipe
the
magnet
near ‘Y’
STATUS START
LOG UART
BLE
HOLD HOLD
HOLD
Move
the
magnet
HOLD
COMSTP
y n
ODOO 1
STATUS START
LOG UART
BLE
HOLD HOLD
HOLD
HOLD
Move
the
magnet
DONE
Swipe
the
magnet
near ‘Y’
UART COMSTR
y n
HOLD
Move
the
magnet
DONE
Swipe
the
magnet
near ‘Y’
STATUS START
LOG
HOLD
STATUS
UART COMSTP
y n
HOLD
Move
the
magnet
DONE
Swipe
the
magnet
near ‘Y’
START
LOG
HOLD

14 | Operation OdaLog Portable Gas Loggers
NULL On / Off
Figure 12. NULL Screen
Ensuring the Odalog is in Clean Air, hold the magnet next to
the Menu until display progresses to “NULL” and then release
button. “NULL IN Prog” will appear to indicate the instrument
is in Null mode. Use the magnet tool near ‘Y’. “DONE” will
appear briefly on the screen.
Span
Figure 13. Span Screen
Hold the Magnet next to the Menu until display progresses to
“SPAN” and then release button. “SPAN IN Prog” will appear
to indicate the instrument is in Span mode. Use the magnet
tool near ‘Y’. “DONE” will appear briefly and the LCD will
return to the “INST” screen.
STATUS START
LOG UART
BLE NULL
HOLD HOLD
HOLD
HOLD
NULLIN
Prog
Swipe Y DONE
Move the
magnet
LOG Prog
LOG Prog
8.8:8.8 8.8:8.8
STATUS START
LOG UART
BLE NULL
HOLD HOLD
HOLD
HOLD
SPAN
SPANIN
Prog Swipe Y
HOLD
DONE
Move the
magnet

OdaLog Portable Gas Loggers Operation | 15
Odalog G20 RTX screens
This section describes a brief operating procedure for the
Odalog instrument G20 RTX, covering the basics of all major
functionality.
Switching On
Figure 14. Switching On
Hold the Magnet next to the Menu Button. “OFF” will count
down to ON 3-2-1. Remove the magnet when the “display”
screen appears.
Main Menu
Figure 15. Main Menu Screens
•INST: This screen displays the instantaneous gas reading
in ppm (parts per million) units. If the Transmit mode is
ON, this screen indicates whether the data is logging or
not. It will display transmitting symbol to indicate that
the transmit mode is ON.
•STATUS: This screen scrolls through overview of
Instrument data.
•TRNSMT On: This screen enables wireless transmission.
Hold the Magnet next to the Menu until “TRNSMT On” is
displayed and then release. The Instrument will then
attempt to connect to the Internet server every 5 minutes
for the first 15 minutes to ensure ongoing transmission.
“TRNSMT On” mode automatically enables logging.
•START LOG: This screen enables logging the data. This
is confirmed by LOGGING symbol
flashing on screen).
•USB: This screen enables USB (Universal Asynchronous
Receiver-Transmitter) link for communicating with the
Odalog instrument.
•Bluetooth: This screen enables Bluetooth Low Energy
link for communicating with the Odalog instrument.
•NULL: This screen is used to reset the device to “NULL”
during calibration. Transmit Mode should be Turned OFF
prior to calibration, as any transmissions to the server will
cause any NULL or SPAN screens to be cancelled.
•SPAN: This screen tests the sensor with gas.
•OFF: This screen enables turning off the instrument. Hold
the Magnet next to the Menu and wait until the display
counts down from “OFF2” to “OFF”. Then, release
button.
When the button is correctly released to turn the
instrument off, the OFF title will shift 1 character to the
right to confirm that the instrument is now in the off state.
LOG 0.0ppm
ON 3 ON 2
ON 1 888888
8.8:8.8
888888
8.8:8.8
OFF
HOLD HOLD
HOLD
HOLD HOLD
LOGGING
%
°C
°F
ppb
ppm
%
°C
°F
ppb
ppm
Move
the
magnet
STATUS TRNSMT
On
INST
0.0ppm
HOLD HOLD
START
LOG UART BLE
HOLD HOLD
HOLD
NULL SPAN OFF
OFF 2
OFF 1
OFF
HOLD
HOLD
Move
the
magnet
HOLD
LO GGING

16 | Operation OdaLog Portable Gas Loggers
Start / Stop Log
Figure 16. Start / Stop Log Screens
Start / Stop Log functions are used to enable / disable the
instrument to log the data.
Hold the Magnet next to the Menu and remove the magnet
when the “START LOG” screen appears.The LOGGING
symbol on screen will now start flashing.
Hold the Magnet next to the Menu and remove the magnet
when the “STOP LOG” screen appears. Use the magnet tool
near ‘Y’ to stop logging the data.
Transmit On / Off
Figure 17. Transmit On / Off Screens
•TRNSMT OFF: This screen exits “Transmit Mode”,
disabling wireless transmission.
•TRNSMT LASt: Hold the Magnet next to the Menu until
“TRNSMT Last” is displayed and then release.
•MODEM In It: This screen displays the Instrument
powering up the modem.
Instrument will return to the INST screen. The LOGGING
symbol on screen should now be flashing.
Hold the Magnet next to the Menu until “TRNSMT OFF” is
displayed and then release. “Transmit OFF” will automatically
“Stop Log”. Use the magnet tool near ‘Y’ to turn off the
transmission.
STATUS TRNSMT
On
START
LOG
INST
0.0ppm
INST
0.0ppm
HOLD HOLD
HOLD
LOGGING
Move
the
magnet
STATUS TRNSMT
On
STOP
LOG
DONE
HOLD HOLD
LOGGING
LOGGING LOGGING LOGGING
Y N
LOGGING
Swipe
the
magnet
near ‘Y’
Move
the
magnet
LO GGING
STATUS TRNSMT
OFF
TRNSMT
LASt
HOLD HOLD
LOGGING LOGGING
INST
0.0ppm
MODEM
In It
HOLD
LOGGING
Move
the
magnet
STATUS TRNSMT
On
STOP
LOG
DONE
HOLD HOLD
LOGGING
LOGGING LOGGING LOGGING
Y N
LOGGING
Swipe
the
magnet
near ‘Y’
Move
the
magnet