ThermoFisher Scientific OdaLog LL User manual

P/N: 10-1000 Revision: F, Issued: October 2019 Page: i
Thank you for purchasing the OdaLog® portable gas logger manufactured by
Thermo Fisher Scientific Australia Pty Ltd.
In our quest to continually improve the product we manufacture, we look
forward to your feedback on your experience using the OdaLog® in different
environments and applications, as well as the usefulness of the information
you collect using it’s data-logging function.
If you have any suggestions or comments, please contact your distributor or
alternatively e-mail us direct on sa[email protected].
Gas Logger
COPYRIGHT© 2018
The sole purpose of this document is to assist in the operation of the OdaLog® portable gas logger.
We do not convey any right to use this information for any purpose other than in the operation or maintenance
of the OdaLog® portable gas logger.
OdaStat™ & OdaStat-G™ © Software Copyright 2008 (Thermo Fisher Scientific Australia Pty Ltd)
GENERAL DISCLAIMER
This Manual summarises our knowledge of the OdaLog® portable gas logger including how to use it based on
the information available at the time. You should read this Manual carefully and consider the information in the
context of how the instrument is to be used.
The OdaLog® portable gas logger is sold subject to our standard terms and conditions of sale and any written
warranty given by Thermo Fisher Scientific. Thermo Fisher Scientific does not accept any other liability either
directly or indirectly for any losses suffered in connection with the use and application of the OdaLog® portable
gas logger, whether or not in accordance with any advice, specification, recommendation or information given
by it or as a result of any errors or omissions in this Manual.

OdaLog® Gas Logger User Manual
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Table of Contents
1 CERTIFICATION / CONFORMITY ........................................................................................................ 1
1.1 EXPLOSION-PROTECTED ELECTRICAL EQUIPMENT - CERTIFICATION & PERFORMANCE CONFORMITY .. 1
1.2 CONDITIONS OF SAFE USE ....................................................................................................................... 1
1.3 ELECTROMAGNETIC COMPATIBILITY (EMC) – COMPLIANCE STATEMENT .............................................. 1
1.4 FCC STATEMENT .................................................................................................................................... 1
1.5 QUALITY STATEMENT ............................................................................................................................. 1
2 WARNINGS AND CAUTIONS .................................................................................................................. 2
3 DESCRIPTION ............................................................................................................................................ 3
4 GENERAL SPECIFICATIONS .................................................................................................................. 5
5 QUICK OPERATIONAL GUIDE .............................................................................................................. 6
5.1 SWITCH ON.............................................................................................................................................. 6
5.2 LCD LAYOUT OVERVIEW........................................................................................................................ 6
5.3 NULL (ZERO) ........................................................................................................................................... 7
5.4 PRE-USE SPAN CHECK............................................................................................................................. 7
5.5 START LOGGING (*MANUAL LOGGING SETTING ONLY) .......................................................................... 7
5.6 STOP LOGGING (*MANUAL LOGGING SETTING ONLY) ............................................................................. 7
5.7 POST-USE SPAN CHECK ........................................................................................................................... 7
5.8 DOWNLOAD DATA ................................................................................................................................... 7
5.8.1 Use irDA ......................................................................................................................................... 7
5.8.2 Use Bluetooth .................................................................................................................................. 7
5.9 SWITCH OFF ............................................................................................................................................ 7
5.10 TRAINING ................................................................................................................................................ 7
6 OPERATION ................................................................................................................................................ 8
6.1 OPERATION OVERVIEW ........................................................................................................................... 8
6.2 SWITCHING ON ........................................................................................................................................ 9
6.3 “CLOCK NOT SET” MESSAGE ................................................................................................................ 9
6.4 DISPLAYING CURRENT STATUS ON THE LCD ......................................................................................... 10
6.5 START LOGGING FUNCTION (*MANUAL LOGGING MODE ONLY, [DEFAULT = ENABLED]) .................... 10
6.6 STOP LOGGING FUNCTION (*MANUAL LOGGING MODE ONLY, [DEFAULT = ENABLED]) ...................... 10
6.7 AUTO LOG START FUNCTION [DEFAULT = DISABLED] .......................................................................... 11
6.8 IRDA (INFRA RED DATA COMMUNICATION MODE) .............................................................................. 11
6.8.1 Enter “IrDA” mode (Infra Red Data Communication Mode) ...................................................... 11
6.8.2 Exit “IrDA” mode (Infra Red Data Communication Mode) ......................................................... 11
6.8.3 Precautions required when using OdaLog® I.R communication .................................................. 11
6.8.4 Steps to ensure reliable I.R communication .................................................................................. 11
6.8.5 Communications Set-up ................................................................................................................ 12
6.9 BT (BLUETOOTH DATA COMMUNICATION MODE) ................................................................................ 13
6.9.1 Enter “BT” mode (Bluetooth Data Communication Mode) ......................................................... 13
6.9.2 Exit “BT” mode (Bluetooth Data Communication Mode) ............................................................ 13
6.9.3 Pairing Instrument with PC .......................................................................................................... 13
6.9.4 Communications Set-up ................................................................................................................ 13
6.10 SWITCHING OFF ..................................................................................................................................... 14
6.11 CLEAR LOGGED DATA ........................................................................................................................... 14
6.12 LOW BATTERY INDICATION & CONTROL .............................................................................................. 15
6.13 KEY LOCK (DEFAULT = DISABLED)....................................................................................................... 15
6.14 NEGATIVE SUPPRESS FUNCTION (DEFAULT = ENABLED) ...................................................................... 16
7 SENSOR OPERATION ............................................................................................................................. 17
7.1 SENSOR CROSS-SENSITIVITY ................................................................................................................. 17
7.2 EFFECTS OF ENVIRONMENTAL CHANGES ON ODALOG® SENSORS ......................................................... 17
7.2.1 Temperature .................................................................................................................................. 17
7.2.2 Humidity ....................................................................................................................................... 18
7.2.3 Pressure ........................................................................................................................................ 18
7.3 LONG TERM EXPOSURE TO HIGH GAS LEVELS ...................................................................................... 18

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8 MAINTENANCE ........................................................................................................................................ 19
8.1 LIVE MAINTENANCE PROCEDURES ........................................................................................................ 19
8.1.1 Battery Replacement ..................................................................................................................... 19
8.1.2 Filter Replacement ........................................................................................................................ 21
8.2 SERVICE ................................................................................................................................................ 22
9 CALIBRATING THE ODALOG® ............................................................................................................ 23
9.1 PREPARATION FOR CALIBRATION .......................................................................................................... 23
9.2 ADSORPTION OF CALIBRATION MIXTURE .............................................................................................. 23
9.3 TOOLS AND TEST EQUIPMENT ............................................................................................................... 23
9.4 CALIBRATION MIXTURE APPLICATION TIMES & RATES ........................................................................ 24
9.5 NULL (FRESH AIR ZERO) ..................................................................................................................... 25
9.6 SPAN SET ............................................................................................................................................... 26
9.7 CALIBRATION ERRORS .......................................................................................................................... 27
9.8 SPAN GAS CHECK – PRE-USE AND POST-USE (IF REQUIRED) ................................................................ 28
9.8.1 Span Gas Check – Pre-Use ........................................................................................................... 28
9.8.2 Span Gas Check – Post-Use ......................................................................................................... 28
9.8.3 Decay Compensation .................................................................................................................... 29
10 OPTIONAL ACCESSORIES AND SPARES .......................................................................................... 30
10.1 ACCESSORIES ........................................................................................................................................ 30
10.2 SPARE PARTS ......................................................................................................................................... 30
10.3 GAS TEST KITS ...................................................................................................................................... 31
10.4 REPLACEMENT TEST GAS CYLINDERS ................................................................................................... 31
11 WARRANTY .............................................................................................................................................. 32
11.1 WARRANTY ........................................................................................................................................... 32
11.2 WHAT THE WARRANTY DOES NOT COVER .............................................................................................. 32
11.3 WHAT THERMO FISHER SCIENTIFIC WILL DO......................................................................................... 32
11.4 LIMITATIONS ......................................................................................................................................... 32
11.5 VALIDITY .............................................................................................................................................. 32
12 PATENTS, TRADE MARKS AND REGISTERED DESIGNS ............................................................. 32
13 APPENDIX A - GLOSSARY OF TERMS AND ABBREVIATIONS ................................................... 33
14 APPENDIX B - CERTIFICATES ............................................................................................................. 34
Table of Figures
Figure 1 - I.R Communications Set-Up ................................................................................................................ 12
Figure 2 - Remove Top Cap Screw, remove Top Cap and Removing Body ....................................................... 20
Figure 3 - Removing Battery and Replacing Battery ............................................................................................ 20
Figure 4 - Top Cap Alignment .............................................................................................................................. 21
Figure 5 - Filter Replacement ............................................................................................................................... 21
Figure 6 - Calibration Mixture Connections ......................................................................................................... 24
Figure 7 - Magnetic switches (RMS/LMS, SPAN/ NULL) .................................................................................... 24
List of Tables
Table 1 Approved Battery Types ............................................................................................................................ 1
Table 2 General Product Specifications .................................................................................................................. 5
Table 3 Available Gas Sensing Types .................................................................................................................... 5
Table 4 Sensor Cross-Sensitivity .......................................................................................................................... 17
Table 5 Cal Gas Times & Rates ........................................................................................................................... 24

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1 CERTIFICATION / CONFORMITY
1.1 Explosion-Protected Electrical Equipment - Certification &
Performance Conformity
The following Authorities have granted intrinsic safety approval to the OdaLog® Logger (Type L2).
Authority Certificate Number Code
EX TC IECEx ITA 08.0010X Ex ia IIC T4 (TAMB = -20oC to +50oC) Ga IP66/68
PRESAFE PRESAFE 19 ATEX 09596X II 1 G, Ex ia IIC T4 Ga IP66/68
1.2 Conditions of Safe Use
 FOR SAFETY REASONS THIS EQUIPMENT MUST BE OPERATED AND SERVICED BY QUALIFIED PERSONNEL ONLY.
READ INSTRUCTION MANUAL, UNDERSTAND AND ADHERE TO MANUFACTURER’S LIVE MAINTENANCE
PROCEDURES BEFORE OPERATING OR SERVICING.
 THE BATTERY SHALL ONLY BE REMOVED OR REPLACED IN A NON-HAZARDOUS AREA.
 SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY.
 ONLY USE WITH ODALOG® APPROVED BATTERY TYPE.
 BATTERY MUST BE REPLACED WITH ONE OF THE FOLLOWING TYPES LISTED IN TABLE 1.
 TO AVOID BUILD-UP OF ELECTROSTATIC CHARGE, THE ODALOG TYPE L2 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 CLASSIFIED AS GROUP IIC. THIS CONDITION DOES NOT
APPLY FOR GROUPS IIA AND IIB.
Table 1 Approved Battery Types
Manufactures Part
Number Code Type Size
Saft LS26500 Lithium C
Tadiran TL-5920/S Lithium C
1.3 Electromagnetic compatibility (EMC) – Compliance Statement
The OdaLog® Type L2 and accessories comply with the emissions and immunity requirements of:
1.4 FCC Statement
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.
1.5 Quality Statement
Thermo Fisher Scientific Australia Pty Ltd produces this product in accordance with our accredited AS/NZ ISO
9001, and ISO/IEC 80079-34 Quality System.
Standard Number Standard Title Compliance
EN 50270: 2015 Electrical Magnetic Compatibility – Electrical apparatus for the detection
and measurement of combustible gases, toxic gases or oxygen. Fully

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2 WARNINGS AND CAUTIONS
 DO NOT USE SOLVENTS TO CLEAN THE ODALOG® GAS LOGGER. DAMP CLOTH SHALL BE USED TO CLEAN OR
WIPE.
 DO NOT INSERT OBJECTS (INCLUDING FINGER) INTO GAS INLET AS THE FILTER MAY BE DAMAGED
 DO NOT REPLACE BATTERIES IN THE FIELD (DO IT IN A CLEAN ENVIRONMENT)
 DO NOT ATTEMPT TO DISASSEMBLE SENSORS AS THEY ARE POTENTIALLY CORROSIVE
 THE USE OF LITHIUM BATTERIES OTHER THAN THE LITHIUM BATTERIES LISTED IN TABLE 1WILL 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
 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.
WARNING TO AVOID ELECTROSTATIC CHARGE
 TO MINIMIZE THE RISK FROM ELECTROSTATIC DISCHARGE, THE INSTRUMENT
SHOULD ONLY BE USED OR PLACED WHERE IT WILL BE PROTECTED FROM
INADVERTENT RUBBING OR WIPING.
 ONLY TOUCH THE INSTRUMENT WITH AN INSULATING OBJECT.
 TO AVOID BUILD-UP OF ELECTROSTATIC CHARGE, THE ODALOG TYPE L2 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 CLASSIFIED AS GROUP IIC. THIS CONDITION
DOES NOT APPLY FOR GROUPS IIA AND IIB.

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3 DESCRIPTION
The OdaLog® is a compact portable gas data-logger, designed by industry-proven manufacturer Thermo Fisher
Scientific Australia – the gas detection specialists 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.
The new generation OdaLog® Logger picks up where its respected predecessor left off. With super-low power
consumption coupled with a long-life lithium cell power-source, battery life will exceed 12 months in most
cases, taking ‘low-maintenance’ to a whole new level.
New and faster infrared wireless communication, 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, % of
memory used, logging mode and time intervals, as well as a battery level indicator.
OdaLog® interfaces with Thermo Fisher Scientific’s own dedicated, easy to use OdaStat-G™ software package
that brings logged data into the office environment in a user-friendly format.
WARNING
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.
The use of Lithium Batteries other than lithium batteries listed in Table 1 will
invalidate the intrinsic safety approval.

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4 GENERAL SPECIFICATIONS
Table 2 General Product Specifications
Instrument Temp Range -20°C (-4oF) to 50°C (122oF)
Sensor Temp Range -10°C to +40°C (14oF to 104oF)
Instrument Relative
Humidity Range 15-90% non-condensing
Ingress Protection IP66/68
External Dimensions Diameter 62mm (2.44”) x Height 196mm (7.72”)
Instrument Weight 420g (14.8oz)
Power Supply(s) Replaceable C-Size Lithium Battery (see Table 1)
(approved battery type/brand/make only)
Battery Life/ Run Time Greater than 8months (for life of Lithium battery)
Data Logging Capacity Up to 42,000 readings in total
Interval Selectable from 1 second to 1 hour
Data Logging
Duration Example
Capacity > Logging Interval of 1min = 29 days
Capacity > Logging Interval of 5min = 6+
months
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.
The following is a list of gas types available for the OdaLog® L2:
Table 3 Available Gas Sensing Types
Model Gas Range Resolution Accuracy
(Full Scale)
Accuracy
(@ 20ppm
gas, STP)
Long term
Logger
(LL)
H2S Hydrogen Sulphide
0-1000 ppm 1 ppm 1% Full Scale
± 2ppm
0-200 ppm 0.1 ppm 1% Full Scale
Standard
Logger
(SL)
0-2000 ppm 1 ppm 2% Full Scale
0-1000 ppm 1 ppm 1% Full Scale
0-200 ppm 0.1 ppm 1% Full Scale
0-50 ppm 0.1 ppm 4% Full Scale
SL CO Carbon Monoxide 0-1000 ppm 1 ppm 2% Full Scale
SL SO2 Sulphur Dioxide 0-20 ppm 0.5 ppm 10% Full Scale
SL NO Nitric Oxide 0-100 ppm 1 ppm 2% Full Scale
SL NO2 Nitrogen Dioxide 0-50 ppm 0.1ppm 4% Full Scale
SL CL2 Chlorine 0-20 ppm 0.1 ppm 10% Full Scale
SL HCN Hydrogen Cyanide 0-30 ppm 0.2 ppm 6% Full Scale
SL NH3 Ammonia 0-100 ppm 1 ppm 10% Full Scale
NOTE: STP = Standard Temperature and Pressure: 20 °C (68 °F) @ absolute pressure 101.3 kPa (14.7 psi).

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5 QUICK OPERATIONAL GUIDE
This section describes a brief operating procedure for the OdaLog® instrument, covering the basics of all major
functionality. For more detail, refer to corresponding information in Section 6.
5.1 Switch On
Press & hold button down, “ON” will count down ON 3-2-1, release the button when the ‘test’ screen appears
(all segments visible/black as shown). The unit will progress through “STATUS” screens then display the
“INST” (Instantaneous reading) screen. (See Section 6.1)
5.2 LCD Layout Overview
1. Lower 7-segment characters – Displays gas readings and status values – usually numerical digits,
some supplemental menu headings and prompts.
2. Upper 14-segment characters – Displays menu headings, prompts and other visual feedback – usually
alphabetic characters, some numerical values displayed on some screens
3. Battery Level Indicator – Displays the battery levels (4 stage depletion, see Section 6.12)
4. Communications Symbol – Indicates if the instrument is successfully connected and transferring data
(i.e. for downloading log and changing parameters and settings in the OdaStat-G™ software package).
5. Logging Symbol – This symbol flashing indicates that the instrument is Logging – Note: flashing
interval does not indicate logging interval (See Section 6.5 for more information on logging)
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 – when displaying the temperature readings on screen in degrees Centigrade or
Fahrenheit, depending on the setting chosen in the OdaStat-G™ software package [Default = º C]
8. Gas Reading units – Indicates if gas readings shown are in ‘parts per million’ or ‘parts per billion’
[‘ppb’ disabled in OdaLog® Logger Type L2 series instruments].

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5.3 Null (zero)
With unit in fresh air press & hold button down until “NULL” is displayed and then release. Move magnet over
wording “NULL” on LHS of LCD screen – “DONE” should appear briefly when completed. (See Section 9.5)
5.4 Pre-Use Span Check
Apply a known level of gas over sensor (using supplied calibration fitting, [Part No. 11-0001]) at the flow rate
and for the flow time as detailed in Table 5 (or until reading stabilises) and record “Start Level” result (See
Section 9.8.1).
5.5 Start Logging (*Manual Logging setting only)
Press & hold button down until “START LOG” is displayed and then release (logging is confirmed by
LOGGING symbol flashing on screen and flashing LED’s). (See Section 6.5)
5.6 Stop Logging (*Manual Logging setting only)
Press & hold button down until “STOP LOG” is displayed and then release. (See Section 6.6)
5.7 Post-Use Span Check
Flow a known level of gas over sensor (using supplied calibration fitting, [Part No. 11-0001]) at the flow rate
and for the flow time as detailed in Table 5 (or until reading stabilises) and record “End Level” result when
reading stabilises. (See Section 9.8.2)
5.8 Download Data
5.8.1 Use irDA
Stop logging as above then press & hold button down until “IrDA” is displayed then release. Use Infra Red Data
Communications link [Part No. 12-0002] and follow the OdaStat-G™ software package instructions for
communicating with the OdaLog® instrument. (Refer to Section 6.8 for more information on communication
setup and download of data)
5.8.2 Use Bluetooth
Stop logging as above then press & hold button down until “BT” is displayed then release. Use Bluetooth Data
Communications link and follow the OdaStat-G™ software package instructions for communicating with the
OdaLog® instrument.
5.9 Switch Off
Press & hold button down until “OFF” is displayed. Continue holding button as it counts down OFF-2-1 then
release. (See Section 6.10)
5.10 Training
To locate your nearest Thermo Fisher Scientific training centre please contact us at the address shown on the
back of this manual or refer to our web site www.odalog.com

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6 OPERATION
6.1 Operation Overview

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6.2 Switching on
Press & hold button down for three seconds (“On” will count down from 3) then release.
The LCD display will show (In Order):
 Test Screen – All segments visible/black
 “CLOCK…not Set” (See Note 3)
 Installed OdaLog® Firmware Version
 Days Since Last Calibrated
 “STATUS” which displays in order;
 “PEAK” gas level since switch on or log start
 “CLOCK” (Shown in 24-hour time. If clock not set (See Section 6.3), this value may be incorrect
on screen and in instrument log – This must be set in the OdaStat-G™ Software – refer to the
OdaStat-G™ Quick User Guide or ‘Help’ section in the software manual)
 Temperature
 “BATT” (Battery), battery volts
 Logging “MEMORY”- % of memory used
 “TYPE” of logging - “roLL” (if continuous logging selected), “oncE” (if Stop log when full is
selected).
 Logging interval – time between gas readings displayed as “SECONDS” (set in the OdaStat-G™
software)
 “CALGAS”, Shows Calibration Gas Level in ppm as set via the OdaStat-G™ software package.
 “CLOCK not SEt” (see note 3 & Section 6.3)
 “LOG FULL” (see note 4 & section 6.7)
The display will then revert to display instantaneous gas readings in ppm.
Note 1: Releasing the button during the countdown routine will cause exit to “OFF” screen.
Note 2: ‘Peak’ is constantly updated when OdaLog® is in use. The Peak value is reset at switch on and at
the start of each logging session.
Note 3: If the clock has not been set “CLOCK not SEt” will be displayed. The message will remain on the
display until the button is pressed to continue. (See Section 6.3)
Note 4: If the Logger memory is full and you have “Auto Log Start” & “Stop log when full” active, (Refer to
the “Instrument Parameters” section in the OdaStat-G™ software package) the unit will not start
logging and the display will show “LOG” “FULL” and the LED’s will illuminate at the same time.
The message will remain on the display until the button is pressed to continue.
6.3 “CLOCK not SEt” Message
If the clock has not been set since the last battery change, “CLOCK not...SEt” will be displayed upon start-up
and when starting log function. This message will be displayed until the button is pressed. Logging will start
normally, however the time and date will be incorrect.
To set the correct time and date, stop logging function (only necessary if the instrument is in Manual Logging
mode - See Section 6.6) place the Instrument into IrDA mode (See Section 6.8.1), and set clock via the
OdaStat-G™ software package – for more information, refer to the ‘OdaStat-G Quick User Guide’, or the Help
function in the software.

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6.4 Displaying current status on the LCD
Press & hold button until “STATUS” is displayed then release button. The display will cycle through
“STATUS” screens as shown.
6.5 Start Logging Function (*Manual Logging Mode only, [Default =
Enabled])
Press & hold button down and continue holding as screen displays “STATUS’, then release button when
“START LOG” is displayed. See note 2 below if “CLOCK not SEt” is displayed when button released.
The OdaLog® is now logging as confirmed by the flashing “LOGGING” symbol on the display and the LED’s
on either side of the display flashing once every 10 seconds (Default: Enabled - can be changed in the
OdaStat-G™ software).
Note 1: If the Logger memory is full and you have “Stop log when full” active, (Refer to the “Instrument
Parameters” section in the OdaStat-G™ software package) the unit will not start logging, the display
will show “LOG” “FULL” and the LED’s will illuminate at the same time. The message will remain
on the display until the button is pressed to continue.
Note 2: If the clock has not been set “CLOCK not SEt” will be displayed. The message will remain on the
display until the button is pressed to continue. (See Section 6.3)
6.6 Stop Logging Function (*Manual Logging Mode only, [Default =
Enabled])
Press & hold button down until “STOP LOG” is displayed then release button.

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6.7 Auto Log Start Function [Default = Disabled]
This function is activated via the OdaStat-G™ software package as per the “Instrument Parameters” section, by
selecting the “Auto Log Start” option. Once active, logging will automatically start and stop every time the
OdaLog® instrument is switched on or off. Logging will also stop and start every time the instrument is entered
into or exited from “IrDA” mode.
Note 1: If the Logger memory is full and you have “Auto Log Start” & “Stop log when full” active, (Refer to
the “Instrument Parameters” section in the OdaStat-G™ software package) the unit will not start
logging, the display will show “MEMORY FULL” and the LED’s will illuminate at the same time.
The message will remain on the display until the button is pressed to continue.
Note 2: If the clock has not been set “CLOCK not SEt” will be displayed. The message will remain on the
display until the button is pressed to continue. (See Section 6.3)
6.8 IrDA (Infra Red Data Communication Mode)
6.8.1 Enter “IrDA” mode (Infra Red Data Communication Mode)
From ON Mode: From the ‘INST’ screen, press & hold button down until “IrDA” is displayed then release
button (IrDA will appear on screen after ‘STATUS’, see diagram in Section 6.1).
From OFF Mode: From the ‘OFF’ screen, press & hold button down until “IrDA” is displayed then release
button (IrDA will appear on screen after the “ON” countdown and the test screen/s, see
diagram in Section 6.11).
Note 1: This can only be done when logging is stopped, unless Auto Log Start is active. (See Section 6.7)
Note 2: The magnetic switches can be tested with magnet in IrDA mode, LED will illuminate to indicate they
are functioning correctly.
6.8.2 Exit “IrDA” mode (Infra Red Data Communication Mode)
Pressing the button when in “IrDA” mode or waiting 75 seconds for unit to “time out” will cause the instrument
to exit communication mode.
6.8.3 Precautions required when using OdaLog® I.R communication
The Infra Red communications system used by the OdaLog® to communicate and transfer data to a computer
has been designed as a fast and convenient method to download information. Like all communication systems,
the Infra Red system has some vulnerabilities that can interfere with normal communications, as more portable
devices are utilising this technology. As a result, the possibility for interference between devices is increasing,
and precautions should be taken to ensure that communications between the OdaLog and PC are reliable and
trouble-free.
Conditions that have the potential to disrupt OdaLog® to computer communications are:
 Infra Red ports built-in to the PC/Laptop or connected to any nearby computers should disabled.
 Infra Red ports on organisers, phones, modems etc. that have been activated or are in use.
 Infra Red ports on printers.
 Strong light sources near the OdaLog during communications
 Infra Red remote control devices from TV’s, air conditioners etc.
Note: The OdaLog® is only susceptible to communication interference when it has been placed into
“IrDA” mode. It is not possible for any other device or source of Infra Red interference to affect the
OdaLog® if the user has not placed the OdaLog® into the “IrDA” mode.
6.8.4 Steps to ensure reliable I.R communication
 Position the OdaLog® correctly with respect to the supplied Infrared Data Communication Link as
shown in Figure 1.
 If you are using a computer with an Infra Red port attached (other then the Infrared Data
Communication Link supplied with the OdaLog®), disable this port to prevent any Infra Red
transmissions from it.

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 Ensure that other devices with Infra Red ports (phones, other computers, organisers etc) that are within
about 10 metres of the OdaLog® do not have their Infra Red ports activated.
 Ensure that strong light sources are not directed onto the OdaLog® while the instrument is in “IrDA”
mode.
 When changing the configuration of the OdaLog® using the OdaStat-G™ software package, always
read back the settings from the OdaLog® after they have been changed to ensure that they have been
received correctly.
Note: In severe cases of Infra Red interference, the OdaLog® may stop responding. If this occurs, contact
your nearest OdaLog® distributor or service centre for advice on restoring normal operation to the
OdaLog®.
6.8.5 Communications Set-up
 If using a USB-based IR adapter, ensure the drivers are installed BEFORE connecting the device
 Connect I.R device to your PC and install the OdaStat-G™ software package.
 Open the OdaStat-G™ software package on your PC, and ensure communication setting are configured
correctly to communicate with your OdaLog® instrument (refer to OdaStat-G™ software package
Help)
 Place OdaLog® into IrDA Mode
 Position I.R device between 25-150mm (1-6”) from the OdaLog® Instrument, ensuring line-of-sight
between I.R device and the I.R module on the OdaLog®, as shown in Figure 1.
 Disconnect instrument when finished.
Figure 1 - I.R Communications Set-Up
USING INBUILT INFRARED DEVICES:
While some infrared ports (laptops mainly) are compatible with the OdaLog, due to the
variation in manufacturers, drivers and communication protocols, users often experience
issues connecting and/or downloading reliably. For this reason, Thermo Fisher Scientific
strongly recommends that users only attempt to connect to the OdaLog via the IR device
supplied with the purchase of the OdaLog instrument. Only advanced users should
attempt to use inbuilt IR ports. If difficulties arise, ensure the inbuilt IR adapter is
disabled, and revert to using the provided adapter.

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6.9 BT (Bluetooth Data Communication Mode)
6.9.1 Enter “BT” mode (Bluetooth Data Communication Mode)
From ON Mode: From the ‘INST’ screen, press & hold button down until “BT” is displayed then release
button (BT will appear on screen after ‘irDA’, see diagram in Section 6.1).
From OFF Mode: From the ‘OFF’ screen, press & hold button down until “BT” is displayed then release
button (BT will appear on screen after the “ON” countdown and the test screen/s and
“irDA”, see diagram in Section 6.11).
Note 1: This can only be done when logging is stopped, unless Auto Log Start is active. (See Section 6.7)
6.9.2 Exit “BT” mode (Bluetooth Data Communication Mode)
Pressing the button when in “BT” mode or waiting 75 seconds for unit to “time out” will cause the instrument to
exit communication mode.
6.9.3 Pairing Instrument with PC
The Odalog instrument must be paired with the PC before the communication can be established. Pairing
procedures:
 Enter “BTPAIR” mode on the instrument LCD, following the same procedures given in 6.9.1
 Pairing with Windows 7
o Enter Devices and Printers
o Click Added a Device
 Pairing with Windows 10
o Enter Devices and Printers
o Select Bluetooth
o Click Added a Device
o Click Pair
6.9.4 Communications Set-up
 If using a USB-based Bluetooth adapter, ensure the drivers are installed BEFORE connecting the
device
 Connect Bluetooth device to your PC and install the OdaStat-G™ software package.
 Open the OdaStat-G™ software package on your PC, and ensure communication setting are configured
correctly to communicate with your OdaLog® instrument (refer to OdaStat-G™ software package
Help)
 Place OdaLog® into Bluetooth Mode
 Position the Odalog instrument within 10 meters from the PC
 Disconnect instrument when finished and remove the instrument from the device list on the PC

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6.10 Switching off
Press & hold button down and wait for display to cycle through screens until “OFF2” is displayed. Keep button
depressed 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.
Note 1: This can only be done when logging is stopped unless Auto Log Start is active. (See Section 6.7)
Note 2: Releasing the button during the countdown routine will cause exit to instantaneous screen.
6.11 Clear Logged Data
Switch instrument “OFF”. Press & hold button whilst “On” counts down from 3 and continue holding until
“CLEAR LOG” appears on screen, then release button.
“Y” and “N” will appear on the display. With the magnetic base of the Allen Tool provided select “Y” to clear
the log memory, “DONE” should appear briefly on the screen before returning to the “OFF” state.
Selecting “N” will return to the “OFF” state without clearing the log memory.
WARNING:
All logged data will be lost when the log is cleared, be sure to download any
data that you wish to keep before clearing the log.

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6.12 Low Battery Indication & Control
Battery power levels are indicated on-screen by means of the multi-segment battery symbol, as shown above
with the transitions with remaining life expectancy. When the battery is above 50% capacity all segments of the
will be displayed, as in stage 1 shown above. Similarly, stage 2 shown above indicates acceptable battery levels
down to 20% battery life.
At low voltage the battery symbol will be displayed as ‘empty’, i.e. without any segments visible, as shown at
stage 3 above. Then, as the battery capacity decreases to a flat (non-operational, stage 4) state, the OdaLog®
instrument will stop the active logging session and switch the instrument off displaying the word “FLAT”
continuously on the display with the Battery Warning symbol flashing.
Note: The instrument cannot be turned back on until the battery has been replaced. Refer Section 8.1.1 for
battery replacement.
6.13 Key Lock (Default = Disabled)
Key Lock (when enabled in the OdaStat-G™ software): this feature enables the user to ‘lock’ the top button and
disable the “INST” display while in logging mode. This feature works as follows:
1. The Key Lock option requires enabling from the OdaStat-G™ software package, as per the “Instrument
Parameters” section.
2. To Lock the OdaLog® instrument.
Once a logging session is started, the user can then select from the menu the option called “LOCK”.
With “LOCK” displayed, release the button to lock prompt confirmation. Swipe the magnetic base of
the Allen Tool provided past the right-hand side of the LCD display near the “Y” on screen. The LCD
will display “LOCKED”, as well as the “LOGGING” symbol flashing. The instrument and button
operation is now locked.

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3. To Un-Lock the OdaLog® instrument:
Place the magnetic base of Allen Tool provided on the left-hand side of the LCD display. Press the top
button and the display will return to “INST” reading screen. The instrument is now unlocked.
6.14 Negative Suppress Function (Default = Enabled)
This function is activated via the OdaStat-G™ software package, “Instrument Parameters” section, by selecting
the “Suppress Negative Reading” option.
Once active, the instrument suppresses all negative readings to the display and the logging memory.
If the instrument drifts negative by more than 2.5% of full scale or less as per factory configuration, the
instrument will display the message “do nuLL”. This indicates that the instrument needs a NULL (Fresh Air
Zero) as per Section 9.5. It is essential that the NULL be performed in ‘clean air’.

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7 SENSOR OPERATION
The OdaLog® uses an electrochemical sensor to detect levels of a specific gas in ppm (parts per million).
The sensor consists of electrolyte and electrodes packaged in a small container with a diffusion barrier which the
gas passes through.
A subsequent chemical reaction causes current flow within the sensor to change in relation to the level of gas
passing through the diffusion barrier.
This current output is then interpreted within the OdaLog®, displayed on the LCD (in ppm) and recorded in the
OdaLog®’s data-logging chip.
Whilst the sensors are designed to react to their specific gas type, there are other gases that will also cause
chemical reactions within the sensor and some of these are listed in (See Section 7.1).
7.1 Sensor Cross-Sensitivity
The presence of other gases can affect the readings of the electrochemical OdaLog® sensors. The chart below
shows how sensors listed are likely to respond to 100 ppm of various interfering gases. There may be gases not
on this chart, which also interfere with OdaLog® sensors.
Table 4 Sensor Cross-Sensitivity
Approximate response to Interfering Gas at 100 ppm unless noted.
H2S CO SO2 NO NO2 HCN
HCL NH3 O3 CL2 H2 C2H4O C2H4 CH4 CO2
OdaLog
®
Sensors
H2S 100 < 2 < 20 < 6 - 20 0 0 0 N/D - 20 <1 N/D 0 0 0
CO 5 100 0 < 30 - 20 < 20 0 0 N/D 0 < 60 N/D < 100 0 0
SO2 130 < 2 100 0 - 120 < 50 0 0 N/D - 50 0 N/D 0 0 0
NO 30 0 0 100 < 30 0 < 20 0 N/D 0 0 N/D 0 0 0
NO2 - 10 0 - 1 0 100 0 0 0 N/D 100 0 N/D 0 0 0
HCN 350 < 1 160 - 10 - 10 100 N/D 0 N/D - 50 0 N/D < 1 0 0
NH3 100 0 60 20 0 N/D 0 100 N/D - 50 0 N/D 0 0 0
CL2 - 25 0 - 1 0 100 0 0 0 N/D 100 0 N/D 0 0 0
N/D: No Data
7.2 Effects of Environmental Changes on OdaLog® Sensors
7.2.1 Temperature
The operating temperature range of OdaLog® sensors is -10°C to +40°C (14oF to 104oF) and within this range
the sensors are temperature compensated, although extreme temperature swings may cause sensor drift until the
temperature sensor stabilises.
Due to the temperature sensor being located within the OdaLog® body, there is a stabilisation time of up to an
hour when significant temperature changes occur.