Ampcontrol GG2 User Manual

Version: 4, October 2020

PN: 177870, 177871, 177872, 177873, 177874, 180733, 180734, 190998, 192855, 193071

Designed and manufactured in Australia by Ampcontrol Pty Ltd

GG2 DETECTOR

CH4 / O2 / CO / CO2 / H2S SENSOR UNITS

User Manual

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GG2 DETECTOR USER MANUAL

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WARNING!

The warning symbol highlights a potential risk malfunction or loss of

performance

Please share these warnings with other operators.

CAUTION!

The caution symbol highlights a potential risk of damage to

equipment.

Please share these cautions with other operators.

NOTE

The note symbol highlights key information.

Please share these notes with other operators.

ENVIRO

The enviro (environmental) symbol highlights areas which may have an

impact on the surrounding fauna and/or flora.

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Copyright Notice

The Ampcontrol GG2 Display described in this document is the property of AMPCONTROL PTY LTD. It
is furnished under a license agreement and is to be used only in accordance with the terms of the
agreement.

No part of the hardware or documentation may be reproduced, transmitted, transcribed, stored in any
retrieval system, or translated into any language or computer language, in any form or by any means,
without prior written permission of AMPCONTROL PTY LTD.

Disclaimer

While every effort has been made to assure the accuracy and clarity of this document, AMPCONTROL
PTY LTD assumes no liability resulting from any omissions in this document, or from misuse of the
information obtained herein. The information in this document has been carefully checked and is believed
to be entirely reliable with all of the necessary information included. AMPCONTROL PTY LTD reserves
the right to make changes to any products described herein to improve reliability, function, or design, and
reserves the right to revise this document and make changes from time to time in content hereof with no
obligation to notify any persons of revisions or changes. AMPCONTROL PTY LTD does not assume any
liability arising out of the application or any use of any product or circuit described herein; neither does it
convey license under its patent rights or the rights of others.

Before You Begin

Thank you for purchasing from the Ampcontrol GG2 range.

WARNING!

In the interests of safety and correct equipment operation, please

take the time to read and understand the content in this manual.

Ampcontrol Contact Details

7 Billbrooke Close, Cameron Park, NSW, 2285
P [phone] | F [phone]
EMAIL: [email protected]
WEB: ampcontrolgroup.com

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TABLE OF CONTENTS

DEFINITIONS ...................................................................................................... 7

1 SAFETY AND OTHER WARNINGS .................................................................. 8

1.1 Safe Use of Equipment .............................................................................. 8

1.2 Supplementary Documentation .................................................................. 9

2 RECEIVING AND STORAGE .......................................................................... 10

2.1 Receiving ................................................................................................. 10

2.2 Inspection ................................................................................................ 10

2.3 Storage after Delivery .............................................................................. 10

2.4 Unpacking of Equipment .......................................................................... 10

3 PRODUCT OVERVIEW .................................................................................. 11

3.1 Overview .................................................................................................. 11

3.2 Key Features: .......................................................................................... 11

3.3 GG2 Display Module ................................................................................ 11

3.4 Markings .................................................................................................. 13

3.5 Electrochemical Sensors ......................................................................... 13

3.6 Catalytic Sensors ..................................................................................... 14

3.7 NDIR Sensors .......................................................................................... 16

3.8 Enclosure ................................................................................................. 16

3.9 Certification .............................................................................................. 18

4 INSTALLATION ............................................................................................... 19

4.1 General Warnings .................................................................................... 19

4.2 Mandatory Installation Practices .............................................................. 19

4.3 Installation Guidelines ................................ .............................................. 20

4.4 Conditions of Safe Use ............................................................................ 21

4.5 Mechanical Installation Information .......................................................... 22

4.6 Electrical Installation Information ............................................................. 22

5 COMMISSIONING AND CALIBRATION ......................................................... 24

5.1 Preliminary Checks .................................................................................. 24

5.2 Calibration ............................................................................................... 24

5.3 Calibration Troubleshooting ..................................................................... 24

6 SERVICE, MAINTENANCE & DISPOSAL ....................................................... 26

6.1 Equipment Service ................................................................................... 26

6.2 Equipment Maintenance .......................................................................... 26

6.3 Disposal ................................................................................................... 27

7 SPECIFICATIONS .......................................................................................... 28

7.1 Electrochemical O2 .................................................................................. 28

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7.2 Electrochemical CO ................................................................................. 29

7.3 Electrochemical H2S ................................................................................ 30

7.4 NDIR CH4 ................................................................................................ 30

7.5 NDIR CO2 ................................................................................................ 32

7.6 Catalytic CH4 ........................................................................................... 33

8 EQUIPMENT LIST .......................................................................................... 34

9 APPROVALS .................................................................................................. 35

9.1 MDR 0001030 GD ................................................................................... 35

9.2 MDR 0001558 GD ................................................................................... 35

9.3 IECEx TRA 16.0020X .............................................................................. 35

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TABLE OF FIGURES

Figure 1: GG2 Example Compatible Modules (iMAC Communication) ................................................... 12

Figure 2: GG2 Detector Overview ........................................................................................................... 12

Figure 3: GG2 Detector enclosure nominal dimensions (mm) ................................................................. 22

Figure 4: GG2 Detector Connector P1 Pin numbering ............................................................................ 23

TABLE OF TABLES

Table 1: Minimum Marking Information ................................................................................................... 13

Table 2: Optional Marking Information .................................................................................................... 13

Table 3: Poisoning of Sensors ................................................................................................................ 14

Table 4: Ingress Protection Rating .......................................................................................................... 17

Table 5: Gas Density Relative to Air ....................................................................................................... 21

Table 6: Conditions of Safe Use ............................................................................................................. 21

Table 7: GG2 Detector connector pin out ............................................................................................... 23

Table 8: Corrective Maintenance Checks ............................................................................................... 27

Table 9: Typical Oxygen Cross-Sensitivity .............................................................................................. 28

Table 10: Typical Carbon Monoxide Cross-Sensitivity ............................................................................ 29

Table 11: Typical Hydrogen Sulphide Cross-Sensitivity .......................................................................... 30

Table 12: Typical NDIR Methane Cross-Sensitivity ................................................................................ 31

Table 13: Typical Carbon Monoxide Cross-Sensitivity ............................................................................ 32

Table 14: Cross sensitivity of catalytic methane gas sensors ................................................................. 33

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DEFINITIONS

Term

Definition

CO

2

Carbon Dioxide

CH4

Methane

CO

Carbon Monoxide

O2

Oxygen

H2S

Hydrogen sulphide

NATA

National Association of Testing Authorities, Australia

Warm Up Time

Time interval, with the equipment in a stated atmosphere, between the time
when the equipment is switched on and the time when the indication reaches
and remains within the stated tolerances

AS 4641:2007

Electrical apparatus for detection of oxygen and other gases and vapours at
toxic levels - general requirements and test methods

AS 2290.3-1990

Electrical equipment for coal mines - maintenance and overhaul Part 3:
maintenance of gas detecting and monitoring equipment.

AS/NZS 60079-

29.1:2008

Explosive atmospheres part 29.1: Gas detectors - Performance requirements of
detectors for flammable gases

IEC 60079.0:2011

Explosive atmospheres - Part 0: Equipment - General requirements

IEC 60079.11:2011

Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"

GG2

Gasguard 2

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1 SAFETY AND OTHER WARNINGS

For safety reasons, the GG2 Detector must be installed, operated and serviced only by competent
personnel. Please read and understand this instruction manual completely before installing, operating or
servicing this equipment. Failure to install or operate this instrument in accordance with the instructions
contained in this manual may create hazardous operating conditions.

1.1 Safe Use of Equipment

The equipment supplied has been designed and manufactured to ensure safe operation. The equipment
must only be used within the design parameters.

The instructions within this manual must be observed as an aid towards achieving the safest possible
installation.

Persons responsible for installation, maintenance, or operation, must observe the following
instructions:

1.1.1 Changes to Equipment

Changes in the design and modifications to the equipment are not permitted. Unauthorised changes
made to the hardware or operating firmware will void the manufacturer's warranty, and may
compromise the integrity of the system into which it is installed and other connected equipment.

1.1.2 Equipment Knowledge

Experience with, or understanding of, this equipment is essential for the safe installation and removal of
the equipment. Therefore, please read and understand this manual prior to use. Competency based
training courses are recommended and are available on request.

1.1.3 Manual Handling

Precautions have been taken to ensure all equipment is safe to handle and free from sharp edges.
However, care should always be taken when handling enclosures and gloves should be worn.

1.1.4 Installation

Correct operation and safety depend on GG2 Detector and associated equipment being installed
correctly. Mechanical and or electrical installation and maintenance of plant and equipment must only
be carried out by appropriately qualified personnel and must be tested thoroughly prior to operation.

1.1.5 Operation

As safety depends on GG2 Detector functioning correctly it is highly recommended that all safety
functions of the unit be periodically tested to ensure correct operation. The plant used to determine or
monitor the presence of gas must be maintained in accordance with Australian Standards AS/NZS

2290.3-2018 Electrical equipment for coal mines - Maintenance and overhaul - Maintenance of gas
detecting and monitoring equipment, as amended from time to time.

1.1.5.1 Electrochemical O2 Operation

AS/NZS 4641 Electrical apparatus for detection of oxygen and other gases and vapours at toxic
levels—General requirements and test methods, state that the concentration indicated by the output
signal shall not vary from the test gas concentration by more than a volume fraction of ±0.3% v/v over
the range 10% - 25% v/v oxygen. When exposed to other gases. Therefore, the 0-25% range Oxygen
Sensor - Electrochemical (177872) may read high when exposed to concentrations of carbon dioxide
exceeding 5%.

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This meets the requirements of The “NSW Government Gazette No 52 Registration of design of Plant
Used to Determine or Monitor the Presence of Gas Order 2015”. However, does not meet the

requirements of AS/NZS 4641:2007 Electrical apparatus for detection of oxygen and other gases and
vapours at toxic levels—General requirements and test methods at a concentration of 10% CO2.

The warmup time is the time interval (with the equipment in a stated atmosphere) between the time
when the equipment is switched on and the time when the indication reaches and remains within the
stated tolerances. The warmup time of the O2 detector for a cold start is 30 Minutes.

This meets the requirements of The “NSW Government Gazette No 52 Registration of design of Plant
Used to Determine or Monitor the Presence of Gas Order 2015” and the performance requirements of
AS/NZS 4641:2018 Electrical apparatus for detection of oxygen and other gases and vapours at toxic
levels—General requirements and test methods. However, does not meet the requirements of AS/NZS
4641:2007 Electrical apparatus for detection of oxygen and other gases and vapours at toxic levels—
General requirements and test methods.

1.1.5.2 Catalytic CH4 Operation

Ampcontrol designed and in-house tested the 0-5% range Methane Sensor - Catalytic (177871) to
comply with the performance requirements of AS/NZS 60079.29.1, Explosive atmospheres, Part 29.1:
Gas detectors—Performance requirements of detectors for flammable gases.

The Mine Safety Technology Centre was engaged to verify the performance of the catalytic detector to
AS/NZS 60079.29.1 and the NSW regulatory requirements. The test report issued states compliance
with the long-term stability test however; this test was shortened from 33 days in total to 26 days in
total.

1.2 Supplementary Documentation

The GG2 Display User Manual is expected to be read in conjunction with the following documentation:

 GG2B023 GG2 Display User Manual
 GG2B032 GG2 Communication User Manual
 GG2B033 GG2 Design, Installation and Maintenance Application Guide

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2 RECEIVING AND STORAGE

2.1 Receiving

All possible precautions are taken to protect the equipment against damage or losses during shipment;
however, before accepting delivery, check all items against the packing list or bill of loading. If there is
evidence of physical damage, notify Ampcontrol immediately.

Notify Ampcontrol immediately in the case of any discrepancies to the packing list. Keep a record of any
claims and correspondence. Photographs are recommended.

Where practicable do not remove protective covers prior to installation unless there are indications of
damage. Boxes opened for inspection and inventory should be carefully repacked to ensure protection of
the contents or else the parts should be packaged and stored in a safe place. Examine all packing
boxes, wrappings and covers for items attached to them, retain and store any approval documentation
for your safety file as applicable prior to wrapping being discarded.

2.2 Inspection

Equipment that is found to be damaged or has been modified away from its published specifications
must not be used. Please contact Ampcontrol if the equipment is suspected to be different than that
ordered or if it does not match the published specifications.

2.3 Storage after Delivery

When the equipment is not to be installed immediately, proper storage is important to ensure protection
of equipment and validity of warranty.

All equipment should be stored indoors between 0-40˚C, preferably on shelves and protected from
moisture and sunlight.

CAUTION!

The GG2 Detector should not be stored in areas that contain

solvent vapours. Some of these vapours are known to create false

"high" zero points and may even damage the sensor electrodes.

Similarly, the GG2 Detector should not be exposed to high levels of

solvent vapours while in operation.

2.4 Unpacking of Equipment

The method of packing used will depend on the size and quantity of the equipment. The following
cautions should be interpreted as appropriate.

CAUTION!

Take care when unpacking crates as the

contents may have shifted during transport.

ENVIRO

The disposal of packaging materials, replaced parts, or components

must comply with environmental restrictions without polluting the soil,

air or water.

Ensure that any timber and cardboard used as packaging is disposed

of in a safe and environmentally responsible manner.

Where possible, dispose of all waste products i.e. oils, metals, plastic

and rubber products by using an approved recycling service centre.

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3 PRODUCT OVERVIEW

3.1 Overview

The GG2 Detector is an intrinsically safe apparatus for the purpose of gas concentration level detection
and atmospheric monitoring. The equipment is housed in a metallic enclosure with a custom plug
interface on the top and is powered by and connected to suitably certified compatible equipment.

The GG2 detector can be mounted via the custom plug interface and is secured with the integral
retention clip. Optionally, the GG2 Detector may be mounted up to 10 meters away from a compatible
module using the optional remote cable assembly. The remote cable assembly allows the GG2 Detector
to be installed in an appropriate position for the target gas.

The GG2 Detector provides a high integrity digital output with extensive diagnostics and is factory
configured for a specific gas technology, type, and range. The GG2 Detector is IECEx Ex ia Group I
certified and the product shall only be used within the limitations of its entity parameters.

This document covers all gas sensor types for the GG2 Detector. The GG2 range of detectors types
consists of electrochemical, catalytic and infrared sensor types each with built-in conversion and digital
output of relevant gas values. The full range consists of:

 Electrochemical:

o Carbon Monoxide (CO)
o Oxygen (O2)
o Hydrogen Sulphide (H2S)

 Catalytic:

o Methane (CH4)

 NDIR:

o Methane (CH4)
o Carbon Dioxide (CO2)

3.2 Key Features:

 Certified Intrinsically Safe - Ex ia I Ma
 Tested to performance requirements of AS4641 and AS/NZS 60079-29.1
 Rugged stainless steel construction
 Failsafe architecture and digital interface
 Extensive self-test routines
 Economical
 Reliable
 Quickly detachable for easy calibrations
 Wide range of gas types available

3.3 GG2 Display Module

Refer to GG2B023 GG2 Display User Manual for information on the GG2 Display.

3.3.1 Digital interface

The GG2 Detector communicates serially using a robust digital communication protocol across P1 pins 3
and 4.

NOTE

Compatible modules available from Ampcontrol fully implement the

GG2 Detector digital interface.

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Figure 1: GG2 Example Compatible Modules (iMAC Communication)

Figure 2: GG2 Detector Overview

1.

Proprietary Connector (P1)

2.

Retention clip

3.

Serial number sticker

4.

NATA sticker

5.

Part number sticker

6.

Detector Marking label

iMAC Fieldbus

2

1

3 5

4 6

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3.4 Markings

Table 1: Minimum Marking Information

THE MINIMUM MARKING MUST CONTAIN THE INFORMATION IN ONE OF THE FOLLOWING

CELLS

AMPCONTROL
GG2 DETECTOR
NDIR
IECEx TRA 16.0020X
Ex ia I Ma

-20°C ≤ Ta ≤ +40°C
SERIAL: XXXXX

AMPCONTROL
GG2 DETECTOR EC
IECEx TRA

16.0020X
Ex ia I Ma

-20°C ≤ Ta ≤ +40°C
SERIAL: XXXXX

AMPCONTROL
GG2 DETECTOR
CAT
IECEx TRA 16.0020X
Ex ia I Ma

-20°C ≤ Ta ≤ +40°C
SERIAL: XXXXX

AMPCONTROL
GG2 DETECTOR
SENSOR
IECEx TRA 16.0020X
Ex ia I Ma

-20°C ≤ Ta ≤ +40°C
SERIAL: XXXXX

Table 2: Optional Marking Information

Optional Marking Information

Connector P1

Pin

Function

Entity Parameters

1

Power

Ui: 16.5V
Ci: Negligible
Li: Negligible

2

Ground

3

Data -

4

Data +

5

Chassis

3.5 Electrochemical Sensors

3.5.1 Oxygen, Carbon Monoxide and Hydrogen Sulphide Gas Sensors

Oxygen, Carbon Monoxide and Hydrogen Gas Sensors work on the principles of chemical oxidation
and reduction. Electrochemical gas sensors contain electrodes, which promote a chemical reaction
with the target gas when an electrical potential is applied. The chemical reaction of target gas within the
sensor creates a current, which is proportional to the rate of target gas consumption. By measuring this
current, the volume fraction of target gas can be calculated and converted into a digital value by the
integrated sensor electronics. The GG2 Detector is temperature compensated and provides a linear
output.

3.5.2 Humidity

Electrochemical sensors contain an electrolyte, which is a key component of sensor operation. Under
low humidity conditions, the electrolyte can dry out leading to permanent sensor failure. Under high
humidity conditions, the electrolyte can absorb too much water and leak from the sensor.

For Oxygen, Carbon Monoxide and Hydrogen Sulphide, the sensor can be operated in a non­condensing relative humidity of 15% to 90% continuously.

3.5.3 Pressure Effects

Electrochemical sensors are sensitive to the effects of pressure and should not be operated outside of
their stated range of ±20 kPa.

3.5.4 Air Velocity

Electrochemical sensors are insensitive to typical air velocities.

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3.5.5 Operational Restrictions

Field bump tests and calibrations using portable gas applicators are susceptible to external air
velocities and pressurisation. These phenomena lead to incorrect concentrations of gas being applied
to the detector during calibration, which may result in under reporting the environmental concentration
of gas. The GG2 Calibration Cup and procedures detailed in this manual have been designed to
prevent errors in the calibration process. Use of any calibration cup not detailed in this manual is
prohibited.

3.6 Catalytic Sensors

3.6.1 Methane Gas Sensors

The Methane Gas Sensor, which operates on the catalytic combustible gas detection principle, is a
small platinum element coated in a catalyst. Electrical current is passed through the platinum wire and
the potential of the catalytic element is monitored by a simple Wheatstone Bridge arrangement.
Combustible gases, once in contact with the heated catalytic surface of the measuring element, react
and cause the surface temperature of the element to rise. Any increase in temperature affects the
resistance of the platinum wire, causing a small shift in potential across the Wheatstone Bridge
proportional to the concentration of the combustible gas. The GG2 Detector is temperature
compensated and provides a linear output.

3.6.2 Poisoning of Sensors (Contamination)

High levels of or long exposure to certain compounds may poison the catalytically active detector
filament thereby reducing or destroying its sensitivity.

Among these compounds are halides, sulphur compounds, leaded petrol, silanes, silicates and other
products with silicon. Products such as aerosol sprays, polishes, waxes and lubricants with silicones
and non-catalysed silicone rubbers such as “silastic”, phosphate esters and hydraulic fluids all damage
catalytic sensors.

CAUTION!

Some sensor poisons can cause irreversible damage to the sensor

rendering it unable to detect hazardous gas levels.

Table 3: Poisoning of Sensors

Chemical

Type

Common Examples

Products

Found in:

(Examples)

Effect on

Performance

Duration of

Effect,

PERMANENT POISONS

Silicones

Hexamethyldislioxane
(HMDS)
Dimethicone

Mould Release
Agents
Lubricants
Cosmetics
Cleaning
Products

Signal output on
gas is reduced.
Effect is noticeable
at levels above
2ppm
(continuous
exposure)

Permanent

Organo­metallic
Compounds

Some Fuels
Petrochemical
Works
Pharmaceutical

Signal output on
gas is reduced.
Effect is noticeable
at levels above

Permanent

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Plants

2ppm
(continuous
exposure)

Acetylene

Welding
Applications
Some
Petrochemical
Plants

Signal output on
gas is progressively
reduced, Zero
Output increases.
Effect is noticeable
at levels >
5%LEL
(Intermittent
Exposure)

Permanent.

TEMPORARY POISONS

Sulphurous
Compounds

Hydrogen Sulphide

Sewage
Digester Gas
Landfill Gas
Sour Gas

Signal output on
gas is reduced.
Effect is noticeable
at
levels above 2 ppm
(continuous
exposure)

Temporary ­performance is
restored when
exposed to clean
air or test gas, but
the

sensor’s resistance

to further poisoning
is affected

Chlorinated
Compounds

Carbon Tetrachloride
Methyl Chloride
Some Freons, such
as R134A,
R152B,
Vinyl Chloride

Solvents, Freons

Signal output on
gas is reduced.
Effect is noticeable
at levels above
100 ppm
(continuous
exposure)

Temporary ­performance is
restored when
exposed to clean
air or test gas, but
the

sensor’s resistance

to further poisoning
is affected

Some
Olefins

Propylene
Styrene
Acrylonitrile

Plastics
Manufacturing

Signal output on
gas is reduced.
Effect is noticeable
at levels above 100
ppm
(intermittent
exposure)

Usually temporary,
except where high
concentrations are
encountered.

3.6.3 Humidity

Catalytic sensors cannot be operated in a condensing atmosphere or where the relative humidity
exceeds 95%. High humidity and condensation can cause significant changes in sensitivity, which
leads to incorrect gas values being read.

3.6.4 Pressure Effects

Catalytic sensors are sensitive to the effects of pressure and should not be operated outside of their
stated range of ±20 kPa.

3.6.5 Air Velocity

Due to the complex dynamics associated within catalytic elements and particle filters, they are slightly
sensitive to changes in air velocity. The GG2 filter assembly has been designed to greatly minimise this
effect.

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Specialist advice should be sought for applications in extreme air velocities.

3.6.6 Operational Restrictions

Methane gas concentrations above the specified range may cause incorrect operation due to
limitations of the catalytic bead. The catalytic sensor will latch the reading to 5% v/v when the gas
concentration exceeds 5% v/v and will require the user to externally verify the ambient gas
concentration is within the measurement range prior to resetting the latch using the digital latch
command.

After a catalytic sensor has exceeded its measurement range, it is recommended that a bump test be
performed to verify the integrity of the apparatus.

Field bump tests and calibrations using portable gas applicators are susceptible to external air
velocities and pressurisation. These phenomena lead to incorrect concentrations of gas being applied
to the detector during calibration, which may result in under reporting the environmental concentration
of gas. The GG2 Calibration Cup and procedures detailed in this manual have been designed to
prevent errors in the calibration process. Use of any calibration cup not detailed in this manual is
prohibited.

3.7 NDIR Sensors

3.7.1 Methane and Carbon Dioxide Gas Sensors

NDIR Gas Sensors work on the infrared gas absorption principle. An infrared light source illuminates
the sensor through a gas pathway with an optical filter that selects the appropriate wavelength for the
gas being detected; the presence of this gas reduces the amount of infrared energy reaching the
detector. This difference in infrared energy with and without gas is used to measure the amount of gas
present, and is converted to a digital value by the integrated sensor electronics. The GG2 Detector is
temperature compensated and provides a linear output.

3.7.2 Humidity

NDIR sensors cannot operate in a condensing atmosphere. In such an environment, a thin film of water
can form across the membrane, effectively sealing it and stopping the passage of gas into the sensor.
On evaporation of this water, the sensor usually resumes normal operation. Above 90% R.H. the
sensor accumulates water vapour and may form condensation to block the infrared path used for gas
detection. Provided the exposure to these extremes of humidity has not been for a long period, the
sensors will recover when exposed to R.H. in the range 15% to 90%.

3.7.3 Pressure Effects

The NDIR sensors do not exhibit a permanent response to changes of pressure but respond to
pressure on a directly proportional basis.

3.7.4 Air Velocity

NDIR sensors are insensitive to typical air velocities.

3.7.5 Operational Restrictions

Field bump tests and calibrations using portable gas applicators are susceptible to external air
velocities and pressurisation. These phenomena lead to incorrect concentrations of gas being applied
to the detector during calibration, which may result in under reporting the environmental concentration
of gas. The GG2 Calibration Cup and procedures detailed in this manual have been designed to
prevent errors in the calibration process. Use of any calibration cup not detailed in this manual is
prohibited.

3.8 Enclosure

3.8.1 Stainless steel housing

The GG2 Detector circuitry and sensor elements are incorporated in a stainless steel housing. The

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housing is robust and corrosion resistant. It is suitable for almost all applications and provides for easy
installation.

3.8.2 Ingress protection rating:

The GG2 Detector has been designed fit for purpose for the harsh environment of an underground
coalmine.

When mated, the enclosure and electrical connection (P1) achieves an ingress protection rating of IP66.
The gas inlet is fitted with a hydrophobic barrier to prevent liquid water and dust from entering the gas-

sampling chamber. The hydrophobic barrier has a three-dimensional structure to minimise the likelihood
of total blockages occurring.

Table 4: Ingress Protection Rating

Section

Ingress protection rating

The enclosure and electrical connection P1 when mated

IP66

Gas sensing inlet and sensor elements

IP54

CAUTION!

IP ratings do not imply that the equipment will detect gas during and

after exposure to those conditions

CAUTION!

If the Hydrophobic barrier is completely blocked no diffusion can occur

and the GG2 Detector cannot respond to a change in gas concentration

A visual inspection and bump test should be performed if the GG2 Detector has been exposed to
excessive dust and water.

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3.9 Certification

3.9.1 IEC 60079-11 and IEC 60079-0

Entity parameters listed on the certificate must be taken into account during system commissioning.
The apparatus is designed to be used in hazardous areas and is certified intrinsically safe IECEx TRA

16.0020X. The controlled version of this certificate can be found on the IECEx website

http://iecex.iec.ch/iecex/exs.nsf/ex_eq.xsp?v=e

3.9.2 AS/NZS 60079.29.1:2008 & AS 4641:2007

To maintain compliance with AS/NZS 60079.29.1:2008 a compatible module or user interface shall
have the following features.

1. Three indicating lights utilising the following colour requirements
a) The colour red is used to indicate alarms.
b) The colour yellow is used to indicate faults.
c) The colour green is used to indicate power.

2. On user request, the software version of the GG2 Detector provided through the digital interface
must be displayed.

3.9.3 NSW Government Gazette 52 of June 2015

Extract from MDR Certificate “MDR 0001030 GD”

The ‘Limitations on the use of this Design’ must include the information below as a minimum:

a. Prior to being used, each plant used to determine or monitor the presence of gas must be

tested for accuracy and calibrated by a test facility in Australia that is accredited by the
National Association of Testing Authorities (NATA). The plant must be covered by a NATA
endorsed certificate supplied to the underground coal mine.

b. The plant used to determine or monitor the presence of gas must be maintained in

accordance with Australian Standard AS 2290.3-2018 Electrical equipment for coal mines ­Introduction, inspection and maintenance - Part 3: Gas detecting and monitoring equipment,
as amended from time to time.

c. Any repair that may affect the instrument’s explosion protection properties must be carried out

at a recognised service facility licensed for that purpose under Part 9 of the Work Health and
Safety (Mines and Petroleum Sites) Regulation 2014.

d. Calibrations must be undertaken in accordance with the manufacturer’s instructions.

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4 INSTALLATION

The GG2 Detector has been designed to connect and mount from compatible modules. Contact
Ampcontrol for the latest range of compatible modules.

NOTE

The GG2 is suitable for installation in Group 1 hazardous areas.

4.1 General Warnings

These instructions have been designed to assist users of the GG2 Detector with installation.
Before the unit can be installed, there are a number of things that need to be considered and understood

to prevent incorrect or unsafe operation of the unit or the system into which it is installed.
Along with relevant competence, and an understanding of the target application, the following points

should be considered:

4.1.1 Ensure that the information provided in this user manual is fully understood.

It is extremely important that the limitations and functionality of the unit are understood to prevent
incorrect installation and use from creating a potentially dangerous risk. If in doubt as to the nature of
the limitations or their implication, consult a competent authority such as a supervisor or Ampcontrol
technical representative.

4.1.2 Ensure that the application into which the unit is being installed has been properly defined, designed, and approved.

Any system intended to mitigate the risk of injury needs to be properly designed and implemented.
Such a system must be the result of structured risk analysis with the outcomes used to define the
system requirements. These requirements, in turn, will guide the choice of instrumentation, logic
solvers, and actuators needed to implement the system. Understanding the needs of the system will
ensure proper selection of equipment.

4.1.3 Ensure that the unit will properly perform the required functions within the system design.

It is important to understand how the unit is intended to interact with other equipment within a system.
For safe and reliable use, it is crucial that neither the unit’s logical operation nor its signalling be
compromised by incompatibilities with connected equipment. For Group I installations, a full Intrinsic
Safety Audit will be required, along with a correctly specified Safety File. Contact Ampcontrol for
engineering services to undertake these assessments.

4.1.4 Modifications of any form to the unit are prohibited.

The unit as supplied has been designed and manufactured to comply with the requirements of
protection and performance standards. If modifications of any form are made to the unit, the equipment
may no longer be fit for use. If any modifications or damage to the unit is evident, do not use the
equipment and contact Ampcontrol for advice.

4.2 Mandatory Installation Practices

The following information must be adhered to when installing the GG2 Detector. Failure to adhere to this
information may give rise to unsafe operation.

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Using the unit in a manner that exceeds its electrical, functional or physical specifications, or in a way
that is contrary to its operating restrictions, may result in equipment malfunction or loss of performance

 The unit must be powered within the specified voltage range.
 The installation of the unit must be carried out by suitably trained and qualified personnel.
 Identification labels fixed to the unit must not be damaged, removed or covered before, during or

after installation.

 The installation is to be in accordance with the relevant installation Standards/Codes of Practice.
 Modifications must not be made to any part of the unit. Modifications to its construction will render

the unit non-compliant.

 Complete and accurate records of the installation must be kept as part of the site installation.
 Confirm the Intrinsically Safe parameters of the GG2 Detector, cables and power supply are

suitable for the application.

 Ensure that the Conditions of Safe Use, listed in the certificate, are adhered to.

4.3 Installation Guidelines

4.3.1 Mounting Location

To ensure continued reliable operation of the GG2 Detector, the following should be considered when
mounting the unit:

 Select a suitable central location for mounting with good access. The location should be as clean

and dry as practicable and at a temperature as close to 20°C as practicable.

 Mount the sensor unit in a position that reduces the risk of mechanical damage.
 Mounting should be to a vertical surface, pointing downwards, allowing for easy wiring access

and subsequent servicing.

 It is essential that the sensor be positioned to take into account the expected flow of the gas to be

measured.

 Allow sufficient space under the sensor for fitting of calibration cups or accessories.
 Ensure to account for the relative density to air of the gas that is being detected.

NOTE

Customised gas panels and systems are also available as well as

sample draw panels. These can be designed specifically to your gas

sensing needs.

For more information call customer service on

1300 267 373

4.3.2 Relative Density of Gas Type

The relative density or buoyancy of the gas or vapour with respect to air determines its propensity to
rise or fall when released into the atmosphere.

Gases or vapours with buoyancy less than air will tend to rise from the source of release.
Conversely, gases or vapours heavier than air will tend to fall and accumulate in concentrations over

long periods of time. Normal air movements in and around such gas concentrations will have the
inevitable effect of producing zones of highly toxic mixtures.

This knowledge of the characteristics of the gas assists when determining the location of the gas
sensor. See Table 5 for gas density values.

For this reason, the detector should be installed in a location that is most suitable for the type of gas
being detected. The services of a Risk Assessment Engineer or specialist should be used if additional
assistance is required in selecting the position of, or the number of sensors required for the application.

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Table 5: Gas Density Relative to Air

Gas

Density

Hydrogen

Lighter than Air

Ammonia

Methane

Carbon Monoxide

Carbon Dioxide

Heavier than Air

Nitric Oxide

Oxygen

Hydrogen Sulphide

Chlorine

Nitrogen Dioxide

4.4 Conditions of Safe Use

The GG2 Detector has one input circuit connected at P1, made up of pins 1 and 2 supplying power and
ground, and pins 3 and 4 for the communication circuit.

The input parameters of P1 (Pins 1 to 4) are:

Table 6: Conditions of Safe Use

P1: Pins 1, 2, 3, 4

Input Parameters

Ui

16.5V

Ci

negligible

Li

negligible

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4.5 Mechanical Installation Information

4.5.1 Enclosure Dimensions

Figure 3: GG2 Detector enclosure nominal dimensions (mm)

4.5.2 Mounting Arrangements

The GG2 Detector is mounted using the custom plug interface directly to a compatible module and
secured with the integral retention clip. Optionally, the GG2 detector may be mounted up to 10 meters
away from a compatible module using the optional remote cable assembly. The remote cable assembly
allows the GG2 Detector to be installed in an appropriate position for the target gas.

4.6 Electrical Installation Information

4.6.1 Compatible Module

The GG2 Detector is a part of a GG2 range of products and is designed to interface directly with
compatible modules. Contact Ampcontrol for a current list of compatible modules.

4.6.2 Remote Cable Assembly

The GG2 detector can be mounted remotely from a compatible module using the GG2 remote cable
assembly. The cable is supplied in 10 metre lengths and may be cut to size.

4.6.3 Earthing Procedures

The metallic GG2 Detector chassis is connected to Pin 5 and compatible modules use a high integrity
multiple contact receptacle to equipotential bond the equipment’s chassis together.

The GG2 Remote sensor cable screens are also connected to Pin 5 of the GG2 Detector and bonded
to the chassis of compatible module.

The compatible modules are usually earthed at the power supply.
The GG2 Detector passes the 500V dielectric strength test between intrinsically safe circuits pins 1-4

and the metallic enclosure pin 5.

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NOTE

GG2 Detector is in conformance to IEC60079.0, section 7.4.2 Dielectric

strength requirement

4.6.4 Detector Wiring and Connectors

The GG2 Detector has a five-pin connector that interfaces directly to compatible modules available
from Ampcontrol or the remote cable assembly. The connector pins are detailed in Table 7.

Figure 4: GG2 Detector Connector P1 Pin numbering

Table 7: GG2 Detector connector pin out

PIN

FUNCTION

1

POWER

2

GROUND

3

DATA-

4

DATA+

5

CHASSIS

1

3

3

2

4

2

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5 COMMISSIONING AND CALIBRATION

Commissioning is the performance of initial checks, adjustments and calibration prior to placing the
system in operation for the first time. Calibration, however, is not limited to performance of
commissioning. Calibration is also performed throughout the life of the system on a periodic basis and
after major repairs to the system.

During commissioning and subsequent re-calibration, it is vital to ensure that procedures are followed to
prevent any abnormal sensor signal from initiating any fault, warning or alarm status indicator, or
equipment control function on auxiliary equipment connected to the Detector. Consult the relevant
control unit manual for details of how to do this.

The instruments supplied are NATA calibrated prior to delivery. However, before putting the system into
operation, it is recommended to check the calibration. This is especially important if the instruments are
commissioned sometime after delivery.

5.1 Preliminary Checks

Perform the following preliminary checks:

1. Verify that all connections are correct and installation complete as detailed in Section 4.

2. Check that the correct supply voltage is available to the GG2 Detector.

3. Apply power to the system.

5.2 Calibration

Before the start of calibration, if the GG2 Detector has spent considerable time at low or elevated
temperatures, please allow the device to stabilise to room temperature in powered-up operational (no
fault) state for 24 hours before beginning calibration. If the GG2 Detector has not experienced exposure
to temperature extremes the apparatus should be left in a powered-up operational (no fault) state for one
hour before beginning calibration.

Calibration of sensors can only be achieved by using the appropriate span and zero gas. The volume
fractions of zero and calibration gas components shall be known to a relative uncertainty of ± 2% of the
nominal value.

Refer to GG2B023 GG2 Display User Manual for an overview of calibration and testing procedures.
Calibration gas should be applied to the sensor at a rate of 0.5 to 1.0 litres per minute, using the GG2

Calibration Cup. Allow sufficient time for sensor to stabilize before adjustment.

CAUTION!

GG2 Detectors should be tested regularly to verify proper operation. AS

2290.3 provides guidance depending on the application.

CAUTION!

GG2 Detectors should be NATA calibration at least every 6 months to

ensure their proper operation.

5.3 Calibration Troubleshooting

If during calibration or zero of the GG2 Detector the status indicates a fault or the reading becomes

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erratic then possible reasons are as follows:

5.3.1 Calibration Error

a) Check the calibration gas. It should be a correct range in air mixture although other trace gases

may be present. Lower percentage gas mixtures will reduce the output leading to unnecessary

change out of the sensor.
b) Check the gas flow to ensure it is 0.5 to 1.0 litres/min.
c) Check sensor is not blocked with dust or mud. The filter cage can be cleaned out with an

antistatic brush before re-attempting calibration.

5.3.2 Zero Error

The sensor zero balance is required to be within a pre-set level and if the sensor is damaged the zero
shift may take it outside the limit. Once this occurs an indication is shown when trying to zero the
instrument, and the sensor should be replaced.

If left in Cal mode the instrument will revert to normal mode after about 2 minutes, retaining its last
settings.

5.3.3 Erratic Readings

Check the calibration cup, gas cylinder and gas lines for leaks or improper flow regulation.

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6 SERVICE, MAINTENANCE & DISPOSAL

NOTE

If a detector is damaged, a replacement may be obtained from the
manufacturer. See the Conditions of Safe Use for details. Otherwise,
there are no user serviceable parts. For repairs or decommissioning,

return to the manufacturer.

6.1 Equipment Service

A number of external system based checks should be completed on a regular basis. These ‘routine
inspections’ must be carried out by suitably trained people with knowledge of the GG2 Detector and the

systems into which it is fitted. Routine inspections may take the form of either visual-only checks, or
visual and ‘hands-on’ checks.

6.1.1 Visual Only Inspections

A basic visual inspection focuses on looking at the installation for signs of physical damage, water or
dust ingress, and the condition of cables and labels. This type of inspection may involve opening
cabinets to gain access to the unit and other equipment. This level of inspection may also include
cleaning display windows that have become obscured by dirt.

Observations would typically be:

 Check that equipment enclosures, cable trays, conduits, etc. are in good order with no physical

damage.

 Check that sealed wall boxes are free from water and dust ingress internally. Door seals are in

good condition.

 Check that connected cables are free from cuts, abrasions and obvious signs of damage. Cable

restraints are in good order and correctly fitted.

 Check that labels on equipment, wall boxes and cables are present and in good condition

(especially certification labels).

 Check that no modifications have been carried out to installed equipment.

6.1.2 Hands-On (Detailed) Inspections

A more detailed inspection would include all of the elements of a visual inspection, plus some checks
that cover the integrity of connections, fixtures and fittings.

In addition to basic visual observations, more detailed integrity checks would involve:

 Verify that equipment housings, wall boxes and other mechanical fixtures are secured in place.

This includes terminal box lids, tightness of cable glands, integrity of wall-box mountings, security
of equipment fixing to walls/DIN rails etc.

 Verify all electrical connections are secure with no loose screw terminals or DIN rail terminals not

fitted to rails etc.

6.2 Equipment Maintenance

Refer to GG2B023 GG2 Display User Manual for an overview of calibration and testing procedures.

6.2.1 Periodic Maintenance

Periodic maintenance consists mainly of scheduled checks to ensure the instrument remains in
adjustment and gives the required response to sampled gas. For recommended maintenance tasks
and schedules, refer to the AS/NZS 2290 series.

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6.2.2 Corrective Maintenance

During maintenance, it is vital to ensure that suitable procedures are followed to prevent any abnormal
sensor signal from unintentionally operating any fault, warning or alarm status indicator, or equipment
control function. Consult the relevant control unit manual for details as to how to do this.

There are no user serviceable parts. If a fault develops, the detector must be returned to an accredited
repair facility.

Table 8: Corrective Maintenance Checks

Fault

Checks

GG2 Detector will

not respond to

digital commands

a) Check that voltage and polarity applied to the instrument is correct.
b) Check the external interface is wired correctly to a compatible module.
c) Check for loose plug and terminal connections.

GG2 Detector

cannot be

Spanned or

Zeroed

a) Gas element has been damaged or is end of life, return to

manufacturer.

Measurement

range exceeded

a) Apply span gas and verify the result is within accuracy.

Device status

remains in warm-

up continuously

a) Check that voltage and polarity applied to the instrument is correct.
b) Turn the instrument off for >1 min before turning it back on.
c) Gas element has been damaged or is end of life, return to

manufacturer.

T90 Time

exceeded

a) Inspect and remove blockages from the filter cage.
b) Gas element has been damaged or is end of life, return to

manufacturer.

6.3 Disposal

ENVIRO

The electronic equipment discussed in this manual must not be

treated as general waste. By ensuring that this product is disposed of

correctly, you will be helping to prevent potentially negative

consequences for the environment, which could otherwise be caused

by incorrect waste handling of this product.

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7 SPECIFICATIONS

7.1 Electrochemical O2

Electrical

Supply Voltage

10 - 16.5VDC

Max Power
Consumption

0.1W

Mechanical and Environment

Dimensions (H x W x D)

86.5mm x 85mm x 93mm

Weight

1kg

IP Rating

IP54

Humidity Range

15% to 90% r.h. non-condensing

Temperature Range

-20˚C to + 40˚C

Pressure Range

±20kPa

Response Time (t90)
via diffusion

<60s

Warm-up Time

30 mins

Stabilization time
(for calibration
adjustments)

3 mins
Sensor Unit

Detection Method

Electrochemical

Calibrated Range

0-25%

Accuracy

±0.3% v/v over the range 10% to 25% v/v
±0.5% v/v over the range 0% to 9.9% v/v

Drift

<1% per 3 months

Repeatability

±1% of reading

Sensing Element Life

>48 months

Resolution

<0.1% v/v

1

Certification

IECEx

IECEx TRA 16.0020X

DPI

MDR 0001030 GD

1

The output measurement resolution is consistent across all gas types and does not infer the accuracy of

the gas type

Table 9: Typical Oxygen Cross-Sensitivity

Test Gas Mixture

Instrument variance from

Standard Test Gas

5% Methane in Air

±0.3% Oxygen

0.01% Hydrogen in Air

±0.3% Oxygen

0.1% CO in Air

±0.3% Oxygen

10ppm Hydrogen Sulphide in Air

±0.3% Oxygen

5% Carbon Dioxide in Air

±0.3% Oxygen

10% Carbon Dioxide in Air

±0.4% Oxygen

5% Nitric Oxide in Air

±0.3% Oxygen

5% Nitrogen Dioxide in Air

±0.3% Oxygen

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7.2 Electrochemical CO

Electrical

Supply Voltage

10 - 16.5VDC

Max power
Consumption

0.1W

Mechanical and Environment

Dimensions (H x W x D)

86.5mm x 85mm x 93mm

Weight

1kg

IP Rating

IP54

Humidity Range

15% to 90% r.h. non-condensing

Temperature Range

-20˚C to + 40˚C

Pressure Range

±20kPa

Response Time (t90)
via diffusion

<60s

Warm-up Time

<5 mins (60 seconds typical)

Stabilization time
(for calibration
adjustments)

3 mins
Sensor Unit

Detection Method

Electrochemical

Calibrated Range

0 - 50 ppm
0 - 100 ppm

Accuracy

±3 ppm over the range 0 ppm to 29 ppm
±6 ppm over the range 30 ppm to 100 ppm

Drift

10% per 6 months

Repeatability

1% reading

Sensing Element Life

>24 months

Resolution

0.01 ppm1

Certification

IECEx

IECEx TRA 16.0020X

DPI

MDR 0001030 GD

1

The output measurement resolution is consistent across all gas types and does not infer the accuracy of

the gas type

Table 10: Typical Carbon Monoxide Cross-Sensitivity

Test Gas Mixture

Instrument variance from

Standard Test Gas

50ppm CO + 5% Methane in Air

±5 ppm CO

50ppm CO + 0.01% Hydrogen in Air

±5 ppm CO

50ppm CO + 10% Oxygen in Nitrogen

±5 ppm CO

50ppm CO + 10 ppm Hydrogen Sulphide in Air

±5 ppm CO

50ppm CO + 5% Carbon Dioxide in Air

±5 ppm CO

50ppm CO + 5% Nitric Oxide in Air

±5 ppm CO

50ppm CO + 5% Nitrogen Dioxide in Air

±5 ppm CO

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7.3 Electrochemical H2S

Electrical

Supply Voltage

10 - 16.5VDC

Max power
Consumption

0.1W

Mechanical and Environment

Dimensions (H x W x D)

86.5mm x 85mm x 93mm

Weight

1kg

IP Rating

IP54

Humidity Range

15% to 90% r.h. non-condensing

Temperature Range

-20˚C to + 40˚C

Pressure Range

±20kPa

Response Time (t90)
via diffusion

<60s

Warm-up Time

<5 mins (60 seconds typical)

Stabilization time
(for calibration
adjustments)

3 mins
Sensor Unit

Detection Method

Electrochemical

Calibrated Range

0 - 50 ppm
0 - 100 ppm

Accuracy

±1 ppm over the range 0 ppm to 9 ppm
±5 ppm over the range 10 ppm to 100 ppm

Drift

10% per 6 months

Repeatability

1% reading

Sensing Element Life

>24 months

Resolution

0-50 ppm 0.1 ppm

1

0-100 ppm 1 ppm

Certification

IECEx

IECEx TRA 16.0020X

DPI

MDR 0001558 GD

1

The output measurement resolution is consistent across all gas types and does not infer the accuracy of

the gas type

Table 11: Typical Hydrogen Sulphide Cross-Sensitivity

Test Gas Mixture

Instrument variance from

Standard Test Gas

50ppm H2S + 0.01% Hydrogen in Air

±5 ppm H2S

50ppm H2S + 10% Oxygen in Nitrogen

±5 ppm H2S

50ppm H2S + 0.01% Carbon Monoxide in Air

±5 ppm H2S

50ppm H2S + 5% Carbon Dioxide in Air

±5 ppm H2S

50ppm H2S + 5% Nitric Oxide in Air

±5 ppm H2S

50ppm H2S + 5% Nitrogen Dioxide in Air

±5 ppm H2S

7.4 NDIR CH4

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Electrical

Supply Voltage

10 - 16.5VDC

Max Power
Consumption

0.1W

Mechanical and Environment

Dimensions (H x W x D)

86.5mm x 85mm x 93mm

Weight

1kg

IP Rating

IP54

Humidity Range

15% to 90% r.h. non-condensing

Temperature Range

-20˚C to + 40˚C

Pressure Range

±20kPa

Response Time (t90)
via diffusion

<30s

Warm-up Time

<5 mins (60 seconds typical depending on ambient temperature)

Stabilization time
(for calibration
adjustments)

3 mins
Sensor Unit

Detection Method

Non-dispersive infrared

Calibrated Range

0-5% v/v

Accuracy

±0.1% v/v or ±5% of indication1

Drift

±0.1% v/v or ±5% of indication1 over 3 months

Repeatability

±0.1% v/v or ±5% of indication1

Sensing Element Life

>5 years

Resolution

0.01% v/v2

Certification

IECEx

IECEx TRA 16.0020X

DPI

MDR 0001030 GD

1

Whichever is greater

2

The output measurement resolution is consistent across all gas types and does not infer the accuracy of

the gas type

Table 12: Typical NDIR Methane Cross-Sensitivity

Test Gas Mixture

Instrument variance from

Standard Test Gas

2% Methane + 13% Oxygen in Nitrogen

±0.2% Methane

2% Methane + 5% Carbon Dioxide in Air

±0.2% Methane

2% Methane + 0.075% Ethane in Air

±0.2% Methane

2% Methane + 0.020% Ethane in Air

±0.2% Methane

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7.5 NDIR CO2

Electrical

Supply Voltage

10 - 16.5VDC

Max power
Consumption

0.1W

Mechanical and Environment

Dimensions (H x W x D)

86.5mm x 85mm x 93mm

Weight

1kg

IP Rating

IP54

Humidity Range

15% to 90% r.h. non-condensing

Temperature Range

-20˚C to + 40˚C

Pressure Range

±20kPa

Response Time (t90)
via diffusion

<60s

Warm-up Time

<5 mins (60 seconds typical)

Stabilization time
(for calibration
adjustments)

3 mins
Sensor Unit

Detection Method

NDIR

Calibrated Range

0-2%
0-5%

Accuracy

±0.05 v/v over the range 0% to 0.5%
10% of applied test gas over the range 0.5% to 2.5%
±0.25 v/v over the range 2.5% to 5%

Drift

±0.05 v/v % v/v or ±5% of indication1 over 3 months

Repeatability

±0.05 v/v

Sensing Element Life

>5 years

Resolution

0.01% v/v2

Certification

IECEx

IECEx TRA 16.0020X

DPI

MDR 0001030 GD

1

Whichever is greater

2

The output measurement resolution is consistent across all gas types and does not infer the accuracy of

the gas type

Table 13: Typical Carbon Monoxide Cross-Sensitivity

Test Gas Mixture

Instrument variance from

Standard Test Gas

0.5% CO2 + 5% Methane in Air

±0.05% CO2

0.5% CO2 + 0.01% Hydrogen in Air

±0.05% CO2

0.5% CO2 + 10% Oxygen in Nitrogen

±0.05% CO2

0.5% CO2 + 10 ppm Hydrogen Sulphide in Air

±0.05% CO2

0.5% CO2 + 5% Carbon Dioxide in Air

±0.05% CO2

0.5% CO2 + 5% Nitric Oxide in Air

±0.05% CO2

0.5% CO2 + 5% Nitrogen Dioxide in Air

±0.05% CO2

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7.6 Catalytic CH4

Electrical

Supply Voltage

10 - 16.5VDC

Maximum Power
Consumption

1W

Mechanical & Environmental

Dimensions (H x W x D)

86.5mm x 85mm x 93mm

Weight

1kg

IP Rating

IP54

Humidity Range

0% to 95% r.h. non-condensing

Temperature Range

-20˚C to + 40˚C

Pressure Range

±20kPa

Response Time (t90) via
diffusion

<30 seconds

Warm-up Time

<5 mins (60 seconds typical)

Stabilization time
(for calibration
adjustments)

3 mins

Sensor Unit

Detection Method

Catalytic2

Calibrated Range

0-5%

Accuracy

±0.1% v/v or ±5% of indication1

Drift

±0.1% v/v or ±5% of indication1 over 3 months

Repeatability

±0.1% v/v or ±5% of indication1

Sensing Element Life

>24 months

Resolution

0.01% v/v3

Certification

IECEx

IECEx TRA 16.0020X

DPI

MDR 0001030 GD

1

Whichever is greater

2

Catalytic sensors require oxygen to operate

3

The output measurement resolution is consistent across all gas types and does not infer the accuracy of

the gas type

Table 14: Cross sensitivity of catalytic methane gas sensors

Test Gas Mixture

Instrument Variance From

Standard Test Gas

2% Methane + 13% Oxygen in Nitrogen

±0.2% Methane

2% Methane + 5% Carbon Dioxide in Air

±0.2% Methane

2% Methane + 0.075% Ethane in Air

±0.2% Methane

2% Methane + 0.020% Ethane in Air

±0.2% Methane

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8 EQUIPMENT LIST

NOTE

Customised gas panels and systems are also available as well as

sample draw panels. These can be designed specifically to your

gas sensing needs.

Refer to GG2B026 GG2 Monitoring Solution Technical Datasheet for

a detailed equipment list.

For more information call customer service on

1300 267 373

Part Number

Category

Description

177870

5%

GG2 Detector NDIR CH4 5%

180733

5%

GG2 Detector NDIR CO2 5%

180734

5%

GG2 Detector NDIR CO2 2%

177871

5%

GG2 Detector CAT CH4 5%

177872

25%

GG2 Detector EC O2 25%

177873

50 ppm

GG2 Detector EC CO 50 ppm

177874

100 ppm

GG2 Detector EC CO 100 ppm

192855

50 ppm

GG2 Detector EC H2S 50 ppm

193071

100 ppm

GG2 Detector EC H2S 100 ppm

177875

Accessory

GG2 Calibration Cup

177876

Accessory

GG2 Connector Dust Cover

178994

Accessory

GG2 Remote Sensor Cable Connection Module

177878

Accessory

GG2 Retainer Clip

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9 APPROVALS

9.1 MDR 0001030 GD

The GG2 Detector has be independently tested by the Mine Safety Technology Centre and several
reports for different gas types were used to register the product for use in NSW underground Coalmines.

The performance criteria assessed was taken from NSW Government Gazette No 52 of 26 June 2015,
which incorporates conformance to both AS/NZS 60079-29.1:2008 and AS/NZS 4641:2007

While the design order does incorporate conformance to the two Australian standards, there are sections
in the Design Order, which are to a lower standard to that of aforementioned standards;

 Catalytic CH4 Detector - Long-term Stability Test

o The Mine Safety Technology Centre was engaged to verify the performance of the

catalytic detector to AS/NZS 60079.29.1 and the NSW regulatory requirements. The test
report issued states compliance with the long-term stability test however; this test was
shortened from 33 days in total to 26 days in total.

 Electrochemical O2 Detector - Cross Sensitivity Test

AS/NZS 4641 Electrical apparatus for detection of oxygen and other gases and vapours
at toxic levels—General requirements and test methods, state that the concentration
indicated by the output signal shall not vary from the test gas concentration by more than
a volume fraction of ±0.3% v/v over the range 10% - 25% v/v oxygen, when exposed to
the standards nominated combinations of laboratory test gasses. However when
independently tested by MSTC the 0-25% range Oxygen Sensor - Electrochemical
(177872) was found to vary from the test gas concentration by a volume fraction ±0.4%
v/v oxygen when exposed to the test gas combination containing 10% Carbon Dioxide.

o The warmup time is the time interval, (with the equipment in a stated atmosphere),

between the time when the equipment is switched on and the time when the indication
reaches and remains within the stated tolerances. The warmup time of the O2 detector for
a cold start is 30 Minutes.

9.2 MDR 0001558 GD

MDR 0001558 GD has be independently tested by the Mine Safety Technology Centre and the
performance report was used to register the product for use in NSW underground Coalmines.

9.3 IECEx TRA 16.0020X

The official controlled version of the certificate may be obtained online from the IECEx website
The attached certificate below was current when this document was published but is to be considered an

uncontrolled version.

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