G TECTA 4G Multi Gas Detection Instrument - Operating Manual
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G‑TECTA™ 4G Multi-Gas Detection Instrument EN Operating Manual
2 3
Contents Whilst The Linde Group has made every effort Safety and Warning information Instructions – specific for use
Safety and Warning information 3 to ensure that the details and information given in hazardous areas
Instructions – specific for use in hazardous areas 3 in both our printed and online publications WARNING Read and understand all instructions The following instructions apply to
are accurate at the time of issue, full technical in the operation section of this operating manual equipment covered by certificate numbers
Instructions – specific for use in
specifications are not necessarily included. before use.
non-hazardous areas 4 IECEx BAS 09.0117 Baseefa09ATEX0245.
Introduction 5
Furthermore The Linde Group policy is one of WARNING Do not substitute components as this
continuous improvement and the right is reserved may impair intrinsic safety and invalidate warranty.
Sensors 5 The following information covers all relevant
to alter details and information as the need arises. WARNING Observe all warnings and points listed in clause 1.0.6 of the Essential Health
Key Features 5 Accordingly the Customer should check any details instructions marked on the instrument and within
& Safety Requirements of the ATEX directive.
Software 5 and information they wish to rely on with The Linde this operating manual.
Batteries 5 Group at the time of purchase. The Linde Group WARNING Observe site health and safety 1. The certification marking is as follows:
can not accept liability in respect of any errors procedures for gases being monitored and evacuation
Product Features 5
procedures.
Switching on 6 or omissions herein contained or for any loss or
damage malfunction or consequential lost arising WARNING Make sure you understand the
Auto Zero 7 alarm warnings.
from reliance upon our publication.
Switching off 7
WARNING If this product is not working properly,
Instrument Storage 7 read the operating manual or call The Linde Group.
The customer will be responsible for any risk
Confidence signals 7 to health or safety from goods in the Customer’s WARNING The accuracy of G-TECTA™ 4G 2. The G-TECTA™ 4G may be used in Zones 1
Display Symbols 7, 8 instruments equipped with a toxic gas sensor should
possession and/or control. The Customer’s attention and 2 with Groups IIA, IIB, and IIC flammable
be checked periodically with known concentration
Alarms 8, 9 is drawn to the fact that statutory regulations and calibration gas. Failure to check accuracy can lead gases and vapours for Temperature Classes
Data & Event Logging 10 recognised codes of practice exist covering the to inaccurate and potentially dangerous readings. T1, T2, T3 and T4.
Wearing the Instrument 11 use and handling of some goods (including safety G-TECTA™ 4G instruments equipped with an oxygen
products.) The Customer must ensure that persons sensor should be periodically calibrated in fresh air.
Gas Sampling 12 3. The equipment is certified for use in ambient
who use the goods receive adequate training WARNING Ensure maintenance and calibrations temperatures in the range –20°C to +55°C
Maintenance, Calibration
and safety literature. are carried out in accordance with the procedures in (-4 to +131 F). The equipment should not
and Gas Testing 12, 13, 14 the operating manual.
be used outside these temperature ranges.
G-TECTA™ 4G Instrument with Ozone Sensor 15
WARNING The equipment is not certified Toxic and Oxygen sensors are not rated for
G-TECTA™ 4G Instrument with CO2 Sensor 15 for use in atmospheres containing more than
continuous operation at high temperatures
PC Interface and PC Software 15 21% oxygen.
greater than 40°C (104°F).
Gas Test/Calibration Troubleshooting 16 WARNING G-TECTA™ 4G portable gas detectors
have been designed for the detection of either oxygen
Product Specification 16 deficiencies or specific toxic gas accumulations. 4. Compliance with Essential Health and Safety
Accessories 17 An alarm condition indicates the presence of a Requirements has been assured by compliance
Troubleshooting 18 potentially life threatening hazard and should be with EN60079-0, EN60079-1, EN60079-11,
taken very seriously. and EN61779-5 as certified by Baseefa.
Sensor Limitations 18
WARNING Ensure only qualified service Compliance with gas detection performance
Available Sensors 19 personnel change sensors, batteries and standards EN50054, EN50057, EN61779-1
Declaration of Conformity 20 operating system.
and EN50104 has been certified by Lloyd’s
The Linde Group Warranty 21 WARNING Only charge batteries in safe Register. EMC compliance to EN50270 has been
(non-hazardous) areas.
certified by 3C Test Ltd.4 5
5. Repair of this equipment and gas sensor Instructions – specific for use in G-TECTA™ 4G Multi-Gas accessories such as shoulder straps and chest
replacement shall be carried out by the non-hazardous areas Detection Instrument harness allow flexible wearing options if desired.
manufacturer or approved service centre in
accordance with the applicable code of practice. G-TECTA™ 4G with CO2 Sensor Introduction The G-TECTA™ 4G has a single mode button and a
The G-TECTA™ 4G multi-gas instrument uses an G-TECTA™ 4G is a premium, portable Multi-Gas high quality display with automatic backlight. The
6. If the equipment is likely to come into contact infrared gas sensor for CO2 detection. The G-TECTA™ Detection Instrument, designed to be carried instrument continuously monitors the gas level in
with aggressive substances, then it is the 4G with a CO2 sensor is not designed or certified or worn by individuals working in potentially the environment providing current, peak, and time
responsibility of the user to take suitable for use in hazardous areas, and the intrinsic safety hazardous environments such as confined spaces. weighted average (TWA) readings for the user.
precautions that prevent it from being information for this instrument is not applicable. G-TECTA™ 4G is certified for use in classified The G-TECTA™ 4G can be configured by utilising
adversely affected, thus ensuring that the type Operation and maintenance of the G-TECTA™ hazardous areas and monitors up to four different Linde G-TECTA™ PC software. Data and event
of protection is not compromised. 4G with a CO2 sensor is essentially the same as gases by displaying the readings simultaneously logging can also be downloaded and managed
for other G-TECTA™ 4G instruments but with the on the instrument screen. Alarm warnings are whilst the instrument is being charged via the
7. The rechargeable battery must only be charged following points to note: transmitted by means of a loud audible alarm, optional charger with communication link.
in non-hazardous (safe) areas by connection a bright visual alarm of blue/red flashing LEDs
to the specified Linde charger. Rechargeable CO2 is present in ambient air at a background and an internal vibrating alarm. Software
batteries can only be replaced by a Linde Group concentration of just under 400ppm (0.04%). The instrument software has been written in
Authorised Service Centre. In any enclosed environment the ambient CO2 Sensors accordance with IEC 61508 to ensure quality and
concentration will increase as a result of people G-TECTA™ 4G can be specified with a wide range integrity in operation. The internal circuitry monitors
8. The equipment is not certified for use in or animals breathing and if the room is poorly of intelligent gas sensors. The sensor is fitted to for any malfunction and will display an error
atmospheres containing more than 21% Oxygen. ventilated concentrations well in excess of an intelligent processor which contains calibration warning to the user in the unlikely event they occur.
Area Classifications: 1 000ppm (0.1%) can occur. CO2 levels in the and sensor information. The G-TECTA™ 4G can be
Zone 1: An area classified as Zone 1 is likely outdoor air will also be enhanced by any emitted reconfigured at any time by replacing the pre- Batteries
to have ignitable concentrations of flammable CO2 e.g. from vehicle exhausts or boiler flues calibrated intelligent sensor(s) with alternative G-TECTA™ 4G is battery operated and is supplied
gases, vapours or liquids present under normal venting to atmosphere so it is normal to see gas types. Sensors should be replaced by trained with a Lithium-Ion battery pack.
operating conditions. fluctuating levels of CO2 on the instrument display service personnel and are easy to fit using “plug
whether indoors or outside. and play” technology. The intelligent sensor(s) are Battery Check
Zone 2: An area classified as Zone 2 is not likely immediately recognised by the instrument and are G-TECTA™ 4G should arrive with sufficient charge
to have ignitable concentrations of flammable ready to use after instrument calibration. so that the instrument can be used straight out the
gases, vapours or liquids present under normal box. However, to attain the full operating time you
operating conditions. Key Features should charge the battery. (The actual operating
G-TECTA™ 4G has been designed to be a reliable time will depend on the types of sensor installed.)
and robust personal monitoring system, whilst The G-TECTA™ 4G will operate for at least 16 hours
being compact, light and easy to use. The on a fully charged battery.
instrument is water and dust tight to IP65 and
IP67 ratings. The G-TECTA™ 4G’s shape and WARNING Only recharge the rechargeable
design ensures high levels of user comfort and battery in a safe (non-hazardous) area with a
minimal interference with the user’s normal work Linde G-TECTA™ 4G charger. Failure to comply could
function. The non-slip grip and alligator clip ensure invalidate safety certification and may result in
secure handling and wear ability and additional permanent damage to the instrument.6 7
G-TECTA™ 4G – Product Features The instrument will continue through a start Note: The instrument will time out in 10 seconds Screen Icons
up sequence as shown below, this will take then change to normal operating mode, without
Start Up Flashing icon,
approximately 45 seconds. performing an auto zero, if the mode button is
G-TECTA™ 4G in
Sensors Sounder not pressed. normal operating mode
Outlet
G-TECTA 4G
AUTO ZERO? AUTO ZERO AUTO ZERO
v1.0 G-TECTA 4G v1.0 G-TECTA 4G v1.0
Battery
!
7 secs CH4 CO CH4 CO
? ? ? ? ? ? ? H2S O2 H2S O2
CH4 %LEL CO ppm
CAL AUTO ZERO?
0.0 0
CH4 %LEL CO ppm
5 – Sep – 2009 5 – Sep – 2009 7 secs
0.0 20.9 0.0 0
14 : 02 : 49 14 : 02 : 49 H2S ppm O2 % ? ? ? ? ? ? ?
0.0 20.9
Always check the gas type being monitored
H2S ppm O2 %
Mode During the start up sequence, check the battery by your instrument and ensure you have been
Button
display to ensure you have enough charge to Note: If Auto Zero fails, a warning message will be trained in your site health and safety procedures.
use the instrument. displayed and an X will appear against the sensor Confidence Signals
Display Screen
that has failed (See the Troubleshooting section if To give you added confidence the instrument
Note: During the start up sequence the next this occurs). is operating correctly, the G-TECTA™ 4G will
calibration date will be displayed. (every 10 seconds):
4 Alarm LEDs
Switching Off
CAL Press and hold the mode button for 5 seconds, the 1. Sound a short beep
Operation 5 – Sep – 2009 display will count down until the display shows 2. Flash a blue LED
14 : 02 : 49 OFF. If you release the mode button during the
Switching on countdown, the G-TECTA™ 4G will return to normal In addition the “3” icon will flash on the display.
The G-TECTA™ 4G is designed to be very easy to If the calibration due date has expired, the operating mode.
operate. Please follow these simple steps to ensure G-TECTA™ 4G instrument will display a warning Display Symbols
your instrument is ready for use: message that calibration is due. As a default Instrument Storage Battery
the instrument can still function, however the In order to optimise sensor performance and lifetime,
Step 1 G-TECTA™ 4G can be configured to automatically
shut down using G-TECTA™ PC software if required.
your G-TECTA™ 4G instrument should be stored in a !
WARNING Ensure the instrument is in clean air. safe, non-hazardous area. The area should be clean When the battery is fully charged, the battery icon
The Linde Group strongly recommends that and dry, between temperature ranges 0-30°C, and at will show 6 black bars. When the battery is empty,
Step 2 instruments are calibrated as soon as possible a humidity level of 20-90%RH. the battery icon flashes and the instrument will
Press and hold the mode button for approximately once the calibration date is due. sound warning beeps.
2 seconds until the red LED flashes on the Normal Operation and Confidence Signals
Auto Zero*
instrument. The display screen will light up and the WARNING When the battery charge is
instrument will begin its start up sequence The Auto Zero function is enabled as a default CH4 %LEL CO ppm
completely empty, G-TECTA™ 4G will switch
setting. During start-up, the instrument will display 0.0 0
off automatically.
G-TECTA™ 4G Start-Up Sequence Auto Zero and “????”. Press the mode button to 0.0 20.9
H2S ppm O2 %
The instrument will test the alarm LEDs, the alarm confirm the Auto Zero function.
sounder, the vibration alarms and the display The instrument will display up to four gas readings
screen. The sounder may be silenced by pressing * This setting can be configured to operate automatically, on and each channel will display the gas types, units
the mode button once. user confirmation (default), or disabled, using G-TECTA™ PC software
(see page 15).
and current readings.8 9
Alarm Note: The G-TECTA 4G is set to “latch” the alarm At the end of the warm up period and assuming the
The TWA alarm for toxic gases will operate when The TWA menu option displays the 8 hour time by default. This means that the instrument will continue instrument is in fresh air, the sensor will revert to a
the short-term (15 minute) or long-term (8 hour) weighted average reading for toxic gases since the to alarm until the operator presses the mode button. numeric display.
time weighted average alarm levels are exceeded. unit was last switched on.
Once you have evacuated the dangerous area, press Note: If the instrument is still in the hazardous area
Zero the mode button on the G-TECTA™ 4G instrument; when the sensor is re-set, the sensor will revert to
WARNING TWA alarms cannot be cleared. TWA
alarms are functional for toxic gas instruments only. The Zero menu option will reset the sensor in the this will reset your G-TECTA™ 4G to normal operating an over-range alarm.
instrument. When the zero function has been mode. If the G-TECTA™ 4G continues to alarm, i.e.
Display Menu Options completed, the instrument will return to normal you are still in a dangerous area, pressing the button The G-TECTA™ 4G can optionally be configured to
The G-TECTA™ 4G menu is displayed operating mode. will have no effect. force the operator to switch the instrument off and
when you press the mode button twice. on to restart. This option is programmable with
G-TECTA™ PC Software.
There are up to 3 menu options plus the WARNING Always ensure you are in fresh air Alarms
Zero
home screen option. To scroll between when using this feature. Zeroing an instrument in a The TWA alarm for toxic gases will operate when
the different options, press the mode button once. contaminated atmosphere could result in incorrect the short-term (15 minute) or long-term (8 hour) Note: All alarm configurations can be set with
To select the menu option you require, double gas readings. time weighted average alarm levels are exceeded. G-TECTA™ PC Software.
click on the selected icon. When the Peak and TWA The G-TECTA™ 4G will display and display
menu options are selected the relevant icon will be Alarms toxic gas levels. WARNING If the sensor power is reconnected
displayed on the screen. when the unit is exposed to an over-range gas
G-TECTA™ 4G has two instantaneous alarm level
concentration there is a risk of damage to the
settings for each sensor – level 1 and level 2 – WARNING TWA alarms are functional for toxic
Peak gas instruments only. pellistor sensor.
and two additional Time Weighted Average (TWA)
The Peak menu option displays the highest gas alarms for toxic sensors.
level for flammable and toxic gases, or the lowest WARNING The TWA alarms cannot be cleared. WARNING Depleted oxygen levels can reduce
level of oxygen, since the instrument was switched Alarm Signals the flammable gas reading. If oxygen levels are
on or was last reset. The red and blue alarm LEDs will flash, the sounder Flammable Over-range Alarm below safe breathing limits it should be assumed
will emit a loud, fast series of beeps and the If flammable gas levels exceed 100% LEL, G-TECTA™ that the flammable reading is low.
After 5 seconds the instrument will display Clear internal vibrator alarm will activate. The display will 4G locks into alarm and displays “ ” showing an Instrument Settings
Peak and “????”. Press the mode button to confirm show the gas in alarm and the alarm level. over-range condition. G-TECTA™ 4G will temporarily The following instrument settings can be altered
the Clear Peak function. The instrument will count Alarm icon cut off power to the sensor to prevent burn out, using G-TECTA™ PC Software:
down and time out in 10 seconds and change back For any gas, there are and display a progress bar for 200 seconds.
to Peak mode if the mode button is not pressed. normally 2 alarm levels* Alarm levels for the sensor:
CH4 %LEL OO ppm
0.0 0 – these are indicated by Note: The alarm remains active until the instrument Level 1 and level 2 alarms can be set for each
0.0 16.7
The Peak feature is mainly used for confined space H2S ppm O2 % the alarm icons: sensor is in normal operating mode. gas sensor.
entry checks, where the instrument is lowered into
a potentially hazardous environment (instead of When the power timeout is complete, the symbol Alarm trigger:
using a sampling hose), and also for viewing peak Gas example changes to “ ” and the mode button should be The alarm trigger can be set for rising levels of gas
gas exposure at the end of a shift. under alarm pressed to put the instrument back into normal (toxic and flammable), or for falling levels of gas
operating mode. The symbol will change to an egg (oxygen deficiency monitoring).
* The instrument has 2 alarm levels to give the user an indication timer to indicate that the sensor is warming up.
that the gas level may be rising. If any alarm warning is indicated
by the instrument the work area should be evacuated.10 11
Alarm latching: • Flammable sensor alarms – on and off 3. Switch off the G-TECTA™ 4G G-TECTA™ 4G Chest/Neck Harness
Latched alarms require the operator to press the mode • The battery condition – switch on, switch off, and place the instrument The optional chest/neck harness allows the user
button to clear the alarm (default setting). The alarm can when placed into or out of the charger into the charger in an to mount the instrument on the chest or around
be set to be latched or unlatched. Unlatched alarms will upright position with the the neck for additional comfort.
screen facing outwards.
clear automatically when the gas hazard has passed. Batteries
Attaching the Chest Harness Plate
Alarm sounder mute: Rechargeable Batteries The chest harness plate is attached to the
The G-TECTA™ 4G sounder can be set to mute for The re-chargeable batteries in the G-TECTA™ 4G are When the instrument is charging, the red LED on instrument by replacing the alligator clip.
level 1 alarms only; pressing the mode button Lithium-Ion batteries. The batteries will re-charge the charger cradle will be lit. When the instrument 1. Remove the M3 screw on the back of the
during an alarm condition, will silence the sounder in 5 hours when fully discharged. The battery life is is fully charged, the red LED will fade. When G-TECTA™ 4G.
and stop the vibrating alarm. The alarm LEDs will 16+ hours in continuous use. G-TECTA™ 4G is fully charged and switched on the 2. Remove the alligator clip.
continue to flash. battery icon will show six black bars. 3. Position the chest harness plate and align
Alarm sounder tone: G-TECTA™ 4G Battery Chargers the screw holes.
Different distinctive tones can be selected for each There are 4 battery charger options for the Note: If the G-TECTA™ 4G is switched on during 4. Attach the screw and tighten.
alarm condition. This optional feature can assist the G-TECTA™ 4G instrument. The standard battery charging, the battery icon will sweep from empty
operator to ascertain the level of hazard. charger is a single drop in charger cradle with to full, the instrument will take longer to charge,
Neck Strap
a power lead. Optional charger units include; and the battery icon will take 20 seconds to update
Attach the strap to the top connectors and place
WARNING This feature should only be set single drop in charger cradle with integral PC on removal from the charging cradle.
around the neck. Adjust the length of the strap until
following extensive instrument user training. interface, a 12V vehicle charger and a 5 the instrument is in a comfortable working position.
instrument multi-charger. Changing Rechargeable Batteries
Data & Event Logging If you experience a noticeable reduction in Chest Harness
The G-TECTA™ 4G instrument records both gas The chargers are powered by a nominal 15 V battery life in the instrument, rechargeable Leave the neck strap in position. Attach the other
data and events. The logs can be accessed dc input. The multi-charger includes a universal batteries should be replaced by a Linde Group strap to the side connectors and link around the
and downloaded by using the G-TECTA™ 4G power supply. To ensure compliance with product Authorised Service Centre. chest. Adjust the strap lengths until the instrument
charger with PC interface and by using G-TECTA™ certification requirements, charging voltages must is in a comfortable working position.
PC software. be limited to less than 9 V. Note: To ensure hazardous area and instrument
ingress protection certification is maintained,
Data is recorded in 1 minute intervals (the intervals WARNING Only re-charge the rechargeable battery replacement should only be carried out by
can be adjusted using the PC software). battery in a safe (non-hazardous) area and with a trained and certified personnel.
Linde G-TECTA™ 4G charger. Failure to comply could
G-TECTA™ 4G also records the time and date for a invalidate safety certification and may result in Wearing G-TECTA™ 4G Instruments
number of operating and diagnostic events including: permanent damage to the instrument.
G-TECTA™ 4G is supplied with a strong and durable
• Switch on and switch off Charging the Batteries alligator clip. The alligator clip will securely attach
• Level 1, Level 2 and Time Weighted Average 1. Ensure you are in a safe area. the instrument to a pocket, lapel, sleeve, belt etc.
Alarms (TWA) – alarm on, alarm off and peak 2. Plug the charger power supply into a mains
gas levels during the alarm socket, and connect to the charger.
• Zero, calibration and gas testing –
success or failure12 13
Gas Sampling 6. To remove the flow cap, unscrew The Linde Group recommends a bump test each time 4G, and a vent line. The Gas Test Kit is supplied in a
the thumbscrew and lift it away from G-TECTA™ 4G instruments are used or issued for convenient carry case.
To take a sample of a gas in a confined space or the instrument. use. As a minimum, a monthly bump test is required
where there are unknown levels of gas present to confirm sensor operation. Test gases of known How to Perform a Gas Test
Gas in composition (compatible with the settings on the 1. Ensure the G-TECTA™ 4G is switched on and in
using G-TECTA™ 4G, the flow sample method can
be used. A flow cap must be fitted over the sensors instrument sensor modules) need to be applied, normal operating mode.
on the front of the instrument and a hose and an to verify sensor response and alarm function. 2. Fit the flow cap onto the front of the sensors
aspirator bulb fitted onto the flow cap nozzles. and attach the hose from the regulator. Attach
Note: Please see The Linde Group data sheet the outlet hose to ‘vent gas away’ – do not
Note: A flow cap and a 2 metre length of hose are “Gas Detector Calibration Frequency” for further extend this hose, restrict or allow kinks.
included in the box with your G-TECTA™ 4G instrument. advice on bump testing and calibration. 3. Swipe the Gas Test Key over the Linde label
The aspirator bulb and hose (Article Number ASGTAK2 on the front of the instrument. The G-TECTA™
or ASGTAK3) is an additional accessory. Gas out The Linde Group manufactures and supplies 4G will activate the Gas Test Mode and show
Gas Test Cylinders under numerous global product TEST and “x” next to the sensors on the display.
1. To fit the flow cap, clip the flow cap over the brands, including Linde, BOC, AGA, Afrox etc. 4. G-TECTA™ 4G will display a progress bar.
WARNING Manual aspirator remote sampling
sensor grills on the front of the instrument and The Linde Group gases supplied for use with your 5. Apply the gas whilst the progress bar is
only provides continuous gas readings for the area
screw the thumbscrew until it is tightly fitted G-TECTA™ 4G gas detection instruments are specially counting down.
in which the hose or probe is located and when the
into place. formulated, high stability long life multi-gas mixes. 6. Wait for the progress bar to complete
aspirator bulb is being continuously squeezed. Each
2. Attach the sampling hose onto the gas in nozzle. (40 seconds). G-TECTA™ 4G will display a
time a new gas reading is required, the aspirator bulb
3. Attach the aspirator bulb onto the gas The G-TECTA™ 4G instrument will determine Pass/ “3” or “x” against each sensor and a master
must be squeezed a sufficient number of times to bring
out nozzle. Fail status for the gas test. “3” or “x” to indicate PASS or FAIL.
a fresh sample and a stabilised reading to the sensor.
4. Check the aspirator bulb is attached correctly In the event G-TECTA™ 4G displays FAIL,
by covering the end of the bulb and by In order to perform successful gas tests ensure: please see the troubleshooting guide
Maintenance, Calibration
squeezing it gently. If there are no leaks, the and Gas Testing • The gas used has the recommended gas (Page 17) or contact The Linde Group.
aspirator bulb should remain deflated for a concentration and it is within the validity date 7. To abort the gas test press the mode button at
few seconds. Cleaning specified by The Linde Group any time whilst the test is in progress.
5. Squeeze the aspirator bulb once per second to Ensure the G-TECTA™ 4G display, operator button
create a steady flow of air into the instrument. and sensor filter remain free from dirt build up. • The gas flow path is leak tight. It is important to Instrument Calibration
We recommend the operator squeezes the Regularly wipe over your G-TECTA™ 4G instrument check that the flow cap is properly fitted to the Calibration of the gas sensor should be performed
aspirator bulb at least 10 times (using the with a damp cloth and inspect the sensor filters for G-TECTA™ 4G instrument, the outlet hose is regularly every 6 months. Over time the accuracy
2 metre hose supplied). Longer lengths of dirt or damage. not restricted in any way, nor additional hose of the gas sensor can drift outside of what is
hose and metal probes can be purchased. For length used considered a safe range and regular calibration is
additional lengths of hose, we recommend Gas (bump) Testing essential to ensure accuracy of gas readings.
that the aspirator bulb is squeezed once for The atmosphere in which G-TECTA™ 4G instruments The G-TECTA™ Gas Test Kit comprises a full gas
every 30cm of hose to enable the gas sample are used can have lasting effects on the sensors. cylinder and regulator with interconnecting hose, a
to reach the sensor. Continue to squeeze the Sensors may suffer losses in sensitivity leading to gas test key (used to activate Gas Test Mode on the
bulb for an additional 45 seconds, or until gas degraded performance if exposed to certain substances. instrument), a flow cap to attach to the G-TECTA™
readings stabilise.14 15
WARNING The accuracy of G-TECTA™ 4G 5. G-TECTA™ 4G will display a progress bar and G-TECTA 4G Instrument with Ozone G-TECTA™ 4G Instrument
instruments should be checked periodically with an “x” will appear against each gas type. (O3) Sensor with CO2 Sensor*
known-concentration of calibration gas. Failure 6. Apply the gas whilst the progress bar is
to check accuracy can lead to inaccurate and counting down. Due to the reactive nature of ozone (O3) special When a G-TECTA™ 4G CO2 sensor is zeroed
potentially dangerous readings. procedures should be followed when calibrating in fresh air it automatically sets the CO2 baseline
Note: You can abort the Calibration test by gas detectors that incorporate an ozone sensor. level to 0.04%. When zeroing the instrument in air,
There are three methods of instrument calibration pressing the mode button at any time whilst ensure you are outside in clean air well away from
available: G-TECTA™ 4G calibration can be the test is in progress. Fittings buildings, vehicles or any CO2 emissions. Please
performed directly on each instrument (one button For ozone calibrations all fittings and pipe work ensure the instrument is held well away from
calibration), by utilising G-TECTA™ PC software 7. The G-TECTA™ 4G instrument will adjust the should be stainless steel, brass, aluminium or PTFE. the breathing zone of the operator.
or by using the Linde G-DOCKA™ Hub. Certified value on the gas sensor to match the stored Fittings or pipe work in other plastic materials such
calibration gases should be used. calibration gas value within the sensor module. as Tygon must not be used. A G-TECTA™ 4G CO2 sensor can also be set to
8. G-TECTA™ 4G will display a “3” or “x” against zero in nitrogen by using G-TECTA™ PC software**.
How to Perform a One Button Calibration Test each sensor to indicate PASS or FAIL. Gas flow rate This is a zero point calibration rather than a normal
1. Ensure you are in clean air and the 9. If any of the G-TECTA™ 4G sensors do not It is important that the flow rate is set correctly as zero. In the PC software, set the calibration value
instrument is in normal operating mode. calibrate successfully, the gas type will remain otherwise pressure effects may distort calibration to 0.00%, apply nitrogen gas and click the
Double click the mode button and select marked with a “x” and the warning messages values and prevent the gas detector from working calibrate button.
“Zero” from the options menu by double “Gas Test Failed” and “Send for Calibration” will correctly. To calibrate, the flow rate should be set
clicking on the “Zero” icon. G-TECTA™ 4G be displayed. The G-TECTA™ 4G must be sent between 0.8-1.0 litres / minute (0.03-0.04 cubic Note: After the zero point calibration is completed,
will perform an Auto Zero. to a Linde Group Authorised Service centre for feet / minute) remember to re-set the calibration gas level to its
To perform a one button calibration, re-calibrating or sensor replacement. previous level.
complete the next steps within 15 minutes Normal safety precautions for handling ozone
of completing the Auto Zero. Note: Gas Test pass and fail, and calibration should always be observed along with any special
2. Fit the flow cap onto the front of the sensors pass, fail and values are stored in the Event log. instructions that accompany the calibration gas
and attach the hose from the regulator. Attach cylinder or generator being used.
the outlet hose to ‘vent gas away’ – do not Note: Some sensors may not be calibration
extend this hose, restrict or allow kinks. enabled. Oxygen sensors are by default not For calibrating the ozone sensor, the special flow
3. Swipe the Gas Test Key over the Linde label on calibration enabled as they are calibrated in fresh cap assembly marked “Ozone Only” (article number
the front of the instrument. The G-TECTA™ 4G air by zeroing. AS4G2009) must be used.
will activate the Calibration Mode and show
“CAL” and “????” on the display. Note: The standard flow cap assembly supplied
WARNING One button calibration will check
4. Press the mode button within 10 seconds to for small drifts of stored calibration value. The Linde with the instrument must be used for calibrating
confirm calibration. Group recommends the G-TECTA™ 4G is sent for full the other gas sensors.
certified calibration at six monthly intervals.
Note: If the mode button is not pressed within 10
seconds then the instrument mode will change to
Gas Test Mode. * Please also see the section – Instructions – specific for use in non-hazardous areas (Page 4)
** Recommended calibration gas is 2% CO2 in a background of nitrogen with a regulated flow of 0.5 l/min (1 SCFH). Care should be taken to
vent the nitrogen flow away from the operator and not allow nitrogen flow for longer than necessary. If indoors, it is recommended to vent
gas out of a window or into an extracted fume cupboard.16 17
G-TECTA™ 4G – PC Interface 4, 5 or 6 and save your changesby clicking Gas Test/Calibration Troubleshooting
and PC Software* the save button on the bottom right of the Problem Possible Cause Solution
options screen No response to gas Gas Cylinder Empty Check cylinder gauge. Replace cylinder
(iv) Close the G-TECTA™ PC software. Hose blocked or kinked Check hose and ensure no gas flow restriction
G-TECTA™ PC Software gives the user access
Instrument fails gas test Gas cylinder empty Check cylinder gauge. Replace cylinder
to data and event log files, printing reports, Gas cylinder out of date Check cylinder expiry date. Replace cylinder
reconfiguring alarm levels, instrument operation Note: If the instrument does not connect to Hose blocked or kinked Check hose and ensure no gas flow restriction
functions, and running calibrations. the PC, select a different communications port Calibration drifted Calibrate instrument
and try again. Gas flow not started in time Repeat gas test. Start gas immediately
Instrument fails calibration Gas cylinder empty Check cylinder gauge. Replace cylinder
G-TECTA™ 4G can be connected to a PC by using Gas cylinder out of date Check cylinder expiry date. Replace cylinder
the G-TECTA™ 4G single drop in charger cradle with 5. Switch on the G-TECTA™ 4G instrument and Hose blocked or kinked Check hose and ensure no gas flow restriction
optional PC interface. The charger cradle is fitted drop it into the charger cradle ensuring it is Calibration drifted Calibrate instrument
Instrument stabilisation time Reset instrument stabilisation time using G-TECTA™ PC
with a D-type 9 pin RS232 socket. The PC requires upright and the display is facing forward.
too short Software
G-TECTA™ PC software and is connected to the 6. Open the G-TECTA™ PC software and using Instrument passes gas test but Zero not performed Initiate zero on instrument menu
charger via a RS232 cable. either the Wizard or the Engineer’s Form, will not enter calibration mode from options menu
select G-TECTA™ 4G and upload the data from Instrument incorrectly configured Re-configure instrument.
Send to Linde Group service centre
Note: A USB-RS232 adaptor is required for most the instrument.
PCs or Laptops. 7. The software will allow you to access data or
configure the instrument as required. G-TECTA™ 4G Product Specification
Set-up Dimensions 71 x 114 x 48 mm
1. Install G-TECTA™ PC software on the PC. Note: For more information on using the G-TECTA™ Weight 295g (with alligator clip & 3 sensors)
IP Rating (Dusts & Liquids) IP65 & IP67
2. Where applicable, install USB software** PC software, see the installed help file. Operating Temperature Rating -20°C Ta +55°C (-4°F Ta +131°F)
(supplied in USB adaptor box). Humidity Rating 20-90% RH – non-condensing, continuous operation
3. Attach the RS232 cable to the charger and Display 128 x 64 Pixel with backlight
the RS232 cable with the USB adaptor Warm-up time period Approx 45 seconds
Typical response time T90: 1
0 seconds (oxygen)
(where applicable) to the PC.
20 seconds (toxic & flammable)
4. When using a USB adaptor to connect the Alarm sounders* 95dB(A) Optional multiple alarm sounds
instrument, follow the procedure below: Visible alarms Dual colour Blue/Red flashing LEDs
(i) Before connecting the instrument, check the Vibrating alarm Internal vibrating
available communications ports available on Repeatability ±2% FSD, 6 months
Electromagnetic Compatibility 2004/108/EC
the G-TECTA™ PC software options screen and
Explosion Protection Certification IECEx/ATEX/CSA
note the ports available IECEx IECEx BAS 09.0117
(ii) Switch on the G-TECTA™ 4G instrument and ATEX BASEEFA09ATEX0245
drop it into the charger cradle CSA CSA22.2, 152
Approval Codes
(iii) Check the available communications ports Global IECEx II 2G Ex ia d IIC T4 Gb
available again and select the new port or port CSA Class I Division 1, Groups A, B, C and D
Safety & Operation Standards EN50014, EN50020, EN50018, 94/9/EC
EN50270, EN50271
* G-TECTA™ PC Software can be downloaded free of charge from www.g-tecta.com * It is recommended that the sounder output is periodically tested to ensure the instrument continues to operate as specified
** If the USB adaptor software does not start automatically, select UC232A, the appropriate operating system and install the driver18 19
G-TECTA™ 4G Accessories G-TECTA™ 4G Troubleshooting
ASGTK G-TECTA™ SG/4G/4GP Gas Test Key Problem/Error Message Possible Cause Solution
AS4GBC12V G-TECTA™ 4G 12v Battery Charger Instrument won’t Battery has no charge Re-charge or replace battery
AS4GBCC12V G-TECTA™ 4G 12v Battery Charger c/w computer interface switch on Mode button released Press mode button until LEDs flash
AS4GBCAU G-TECTA™ 4G 230v Battery Charger Australian too soon
AS4GBCUK G-TECTA™ 4G 230v Battery Charger UK No confidence beep Instrument function disabled Reconfigure instrument using
G-TECTA™ PC Software
AS4GBCEU G-TECTA™ 4G 230v Battery Charger Europe
Gas reading on display Instrument zero drifted Restart instrument in clean air
AS4GBCUS G-TECTA™ 4G 110v Battery Charger USA
when in clean air
AS4GBCCAU G-TECTA™ 4G 230v Battery Charger Australian c/w computer interface
Unstable or inaccurate Sensor failure Do NOT use instrument
AS4GBCCUK G-TECTA™ 4G 230v Battery Charger UK c/w computer interface gas readings Exit hazardous area immediately
AS4GBCCEU G-TECTA™ 4G 230v Battery Charger Europe c/w computer interface and return instrument for service
AS4GBCCUS G-TECTA™ 4G 110v Battery Charger USA c/w computer interface Auto Zero failure Instrument zeroed in Switch off instrument
AS4GBC5AU G-TECTA™ 4G 5-Way Multi-charger Australian contaminated atmosphere and restart in clean air
AS4GBC5UK G-TECTA™ 4G 5-Way Multi-charger UK Alarm preventing Instrument zeroed in Switch off instrument
Auto Zero contaminated atmosphere and restart in clean air
AS4GBC5EU G-TECTA™ 4G 5-Way Multi-charger Europe
Calibration expired Calibration due date has passed Return instrument for calibration
AS4GBC5US G-TECTA™ 4G 5-Way Multi-charger USA
Display shows empty Battery has no charge Re-charge or replace battery
AS4GBCC5AU G-TECTA™ 4G 5-Way Multi-charger Australian c/w computer interface
battery symbol
AS4GBCC5UK G-TECTA™ 4G 5-Way Multi-charger UK c/w computer interface
LCD too faint/dark Instrument contrast Adjust instrument using
AS4GBCC5EU G-TECTA™ 4G 5-Way Multi-charger Europe c/w computer interface setting incorrect G-TECTA™ PC Software
AS4GBCC5US G-TECTA™ 4G 5-Way Multi-charger USA c/w computer interface
If you experience any other issues with the operation of the G-TECTA™ 4G instrument, please go to www.g-tecta.com or contact an
ASGTAK2 G-TECTA™ Aspirator and 2m hose
Authorised Linde Group Service Centre.
ASGTAK3 G-TECTA™ Aspirator and 3m hose
AS4G2003 G-TECTA™ 4G Flow cap assembly
ASGTSP G-TECTA™ 4G/4GP 1m Sample probe
ASGTTSP G-TECTA™ 4G/4GP Telescopic sample probe
ASGTAH G-TECTA™ 4G/4GP Aspirator hose
ASGTPF G-TECTA™ 4G/4GP In line water trap/particulate filter inc filter element
ASGTFE G-TECTA™ 4G/4GP Filter element for inline water trap
ASGTDL6 G-TECTA™ 4G/4GP 6 m drop line
AS4G2004 G-TECTA™ 4G Harness Assembly including shoulder strap
ASGTCHS G-TECTA™ 4G/4GP Chest harness straps
AS4G2005 G-TECTA™ 4G Carry Case
AS4G2006 G-TECTA™ 4G Dust Filter
AS4G2007 G-TECTA™ 4G Hard Shell Case
ASGTPCI G-TECTA™ SG/4G PC Interface Lead with USB to RS232 Adaptor20 21
Sensor Limitations G-TECTA™ Electrochemical gas sensors (toxic gases
or oxygen), contain chemicals. Extreme levels of Declaration of Conformity
The sensors used in the G-TECTA™ 4G have humidity can cause problems. The sensors are rated
In accordance with ISO/IEC 17050-1:2004 and European Directive 94/9/EC
limitations common to all gas sensors, and users for an (average) ambient humidity of 20-90% R.H.
should be aware of the points listed below. However the sensors are commonly used from the We hereby declare that on the date the product accompanied by this declaration are placed
The Linde Group can advise on particular situations tropics, to deserts, to tundra without any functional on the market, the product conforms with all technical and regulatory requirements of the
and suggest alternative sensors if the instrument issues. Water should not be allowed to collect on directives listed below.
is likely to experience extreme conditions. the sensor as this may impede gas diffusion.
Product Type
G-TECTA™ 4G flammable instruments use a catalytic Persistent exposure to high levels of toxic gas G-TECTA™ 4G
pellistor gas sensor. Common with sensors of this will shorten the life of a toxic sensor. If the high
type, instrument readings will be unreliable over level gas is corrosive (e.g. hydrogen sulphide), Certification
concentrations of approximately 120% LEL and damage may occur over time to metal components. BASEEFA09ATEX0245
oxygen is necessary for catalytic sensors to operate. Sensors may be cross sensitive to other gases. IECEx BAS 09.0117
A ‘pellistor saver’ is used to disconnect power to If unsure, contact The Linde Group.
Applicable Directives
the pellistor sensor in the event of “over-range”
Electromagnetic Compatibility 2004/108/EC
(above 100% LEL) to prevent burn out. Available Sensors
Explosive Atmospheres 94/9/EC
Sensor Type Range
This feature “locks out” the sensor for 200 (LEL) Methane 0-100% Notified Body
seconds, after which a press of the mode button (LEL) Propane 0-100% Baseefa 1180 Buxton UK
(LEL) Pentane 0-100%
on the instrument will reconnect power to the
pellistor. Restart should be carried out in a known
(LEL) Butane 0-100% Provisions of the Directive fulfilled by the product:
(LEL) Ethylene 0-100% Group II Category 2G Ex ia d IIC T4 Gb (-20°C Ta + 55°C) IP65 & IP67
clean air environment.
(LEL) Hydrogen 0-100%
(LEL) Flammable alcohols, 0-100% Conformity – Harmonised Standards
WARNING If the sensor power is reconnected ketones, general solvents EN60079-0:2006; EN60079-1:2007; EN60079-11:2007;
when the unit is exposed to an over-range gas (O2) Oxygen 0-25% EN50270:2006; EN50104:2002; EN60079-29-1:2007
concentration there is a risk of damage to the (O3) Ozone* 0-1 ppm
pellistor sensor. (CO) Carbon Monoxide 0-500 ppm
(H2S) Hydrogen Sulphide 0-100 ppm
Signed:
WARNING Depleted oxygen levels can reduce (CO/H2S) Carbon Monoxide/ 0-500ppm/0-100ppm
Hydrogen Sulphide
the flammable gas reading. If oxygen levels are
(SO2) Sulphur Dioxide 0-10 ppm
below safe breathing limits it should be assumed (NH3) Ammonia 0-100 ppm
that the flammable reading is low. (CO2) Carbon Dioxide 0-5%
(non Ex areas)
Name: Peter Upcott
* Reactive gases – see G-TECTA™ datasheet on gas sampling
with reactive gases Position: Global Category Manager – Safety Products
Company: The Linde Group, GU2 7XY, UK
Date: June 201022 23
The Linde Group Instrumentation Warranty periods for instruments Notes
Warranty Gas Detection Products and accessories
Product Warranty period
General G-TECTA™ SG 2 years from
The Linde Group warrants gas detectors, sensors G-TECTA™ 4G date of purchase
and accessories manufactured and sold by G-TECTA™ 4GP
The Linde Group to be free from defects in G-TECTA™ SG2 2 years from
materials and workmanship for the periods listed date of purchase
in the following tables. Damages to any Linde G-DOCKA™ SG2 1 year from
Group products that result from abuse, alteration, date of purchase
G-DOCKA™ Hub 2 years from
power fluctuations including surges and lightning
date of purchase
strikes, incorrect voltage settings, incorrect
Instrument chargers/interfaces 2 years from
batteries, or repair procedures not made in
date of purchase
accordance with the product’s Operating Manual,
Battery packs, pumps and consumables 1 year from
are not covered by The Linde Group warranty.
date of purchase
The obligation of The Linde Group under this Warranty periods for sensors
warranty is limited to the repair or replacement of
Sensor type Warranty period
components deemed by The Linde Group Service Oxygen & Flammable Sensors 2 years
Department to have been defective under the scope H2S & CO Toxic Sensors 2 years
of this standard warranty. To receive consideration All other Toxic Sensors 1 year
for warranty repair or replacement procedures,
** Damage to combustible gas sensors by acute or chronic
products must be returned with transportation and exposure to known sensor poisons such as volatile lead
shipping charges prepaid to The Linde Group, or to (aviation gasoline additive), hydride gases such as phosphine,
and volatile silicone gases emitted from silicone caulks/
a Linde Group Authorised Warranty Service Centre. sealants, silicone rubber moulded products, laboratory glassware
It is necessary to obtain a return authorisation greases, spray lubricants, heat-transfer fluids, waxes and
polishing compounds (neat or spray aerosols), mould-release
number from The Linde Group prior to shipment.
agents for plastics injection-moulding operations, waterproofing
formulations, vinyl and leather preservatives, and hand lotions
THIS WARRANTY IS EXPRESSLY IN LIEU OF that may contain ingredients listed as cyclomethicone, dimethicone
and polymethicone (at the discretion of The Linde Group Service
ANY AND ALL OTHER WARRANTIES AND
department) void The Linde Group’s Standard Warranty as it applies
REPRESENTATIONS, EXPRESS OR IMPLIED, to the replacement of combustible gas sensors.
INCLUDING BUT NOT LIMITED TO, THE WARRANTY
OF FITNESS FOR A PARTICULAR PURPOSE. THE
LINDE GROUP WILL NOT BE LIABLE FOR LOSS OR
DAMAGE OF ANY KIND CONNECTED TO THE USE OF
ITS PRODUCTS OR FAILURE OF ITS PRODUCTS TO
FUNCTION OR OPERATE PROPERLY.Australia South Africa Thailand
BOC Customer Service Centre Afrox Customer Service Centre TIG Customer Service Centre
10 Julius Avenue, North Ryde, 1 Smits Street, 15th Floor, Bangna Tower A 2/3 Moo 14,
Sydney Industries West, Bangna-Trad Road., T.Bangkaew,
NSW 2113 Germiston A.Bangplee, Samutprakarn 10540,
Australia 1400 Thailand
South Africa
Tel: 131 262 Tel. (66-2) 338-6100
Fax: 132 427 Tel: 0860 020202 Fax. (66-2) 312-0126
e-mail: contact@boc.com Fax: 0860 020201 Customer Service Centre : 1384
www.boc.com.au e-mail: customer.service@afrox.linde.com E-mail: salescenter@tig.boc.com
www.afrox.com www.tig.co.th
New Zealand
BOC Customer Service Centre Canada
988 Great South Road, Linde Customer Service Centre
Penrose, 5860 Chedworth Way,
Auckland Mississauga,
New Zealand Ontario,
L5R OA2
Tel: 0800 111 333 Canada
Fax: 0800 229 923
e-mail: customer.servicenz@boc.com Tel: 1-888-256-7359
www.boc.co.nz Fax: 1-877-262-8955
e-mail: info@lindecanada.com
UK www.lindecanada.com
BOC Customer Service Centre
Priestley Road, Colombia
Worsley, AGA Customer Service Centre
Manchester, Apartado Aéreo 3624
M28 2UT Bogotá D.C.
United Kingdom Colombia
Tel: 0800 111 333 Tel: +57/1/4254550
Republic of Ireland: 1890 355 255 Fax: +57/1/4146040
Fax: 0800 111 555 e-mail: atencionaclientes@co.aga.com
e-mail: uk-industrial@boc.com www.aga.com.co
www.bocindustrial.co.uk
or www.bocsafetyproducts.co.uk
v1.1 2010
G-TECTA™ 4G Operating Manual
©2010 The Linde Group.
All rights reserved. No page or part of this operation manual may be reproduced in any form without written permission
of the copyright owner shown above. The Linde Group reserves the right to correct typographical errors.
All information is correct at time of going to print.
www.g-tecta.com
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