G‑TECTA® SG
Premium Single Gas
Detection Instrument
Operating Manual
UK
UK
Contents
Safety and Warning information
3
Instructions – specific for use
in hazardous areas 3, 4
Instructions – specific for use
in non‑hazardous areas 4
Introduction 5
Sensors 5
Key Features 5
Software 5
Batteries 5, 9
Product Features 6
Switching on 6
Auto Zero 6
Switching off 6
Instrument Storage 6
Confidence signals 7
Display Symbols 7
Alarms 8
Instrument Settings 8
Data and Event Logging 9
Wearing the Instruments 10
Gas Sampling 11
Maintenance, Calibration
and Gas Testing 11
Ozone Instrument 13
CO
2
Instrument 13
Gas Test/Calibration Troubleshooting 14
PC Interface and PC Software 15
Product Specification 16
Accessories 17
Troubleshooting 18
Sensor Limitations 19
Available Sensors 19
Declaration of Conformity 20
The Linde Group Warranty 21
Whilst The Linde Group has made every effort
to ensure that the details and information given in
both our printed and online publications are accurate
at the time of issue, full technical specifications are
not necessarily included. Furthermore The Linde Group
policy is one of continuous improvement and the
right is reserved to alter details and information as
the need arises. Accordingly the Customer should
check any details and information they wish to rely
on with The Linde Group at the time of purchase.
The Linde Group can not accept liability in respect of any
errors or omissions herein contained or for any loss or
damage malfunction or consequential lost arising
from reliance upon our publication.
The customer will be responsible for any risk to health
or safety from goods in the Customer’s possession and/
or control. The Customer’s attention is drawn to the
fact that statutory regulations and recognised codes
of practice exist covering the use and handling of
some goods (including safety products.) The Customer
must ensure that persons who use the goods receive
adequate training and safety literature.
2
3
UK
2. The G-TECTA® SG may be used in Zones 1
and 2 for flammable versions and Zones 0,
1, and 2 for toxic and oxygen versions. Both
versions can be used for Group IIA, IIB, and IIC
gases and vapours for Temperature Classes T1,
T2, T3 and T4.
Flammable Gas
Baseefa09ATEX0240
Ex ia d IIC T4 Gb -4F/-20ºC ≤ ta ≤ 149F/65ºC
N694
The Linde Group, GU2 7XY, UK
1180
II 2G
www.g-tecta.com
G-TECTA SG
™
BAR CODE IIIIIIIIII
IECEx BAS 09.0115
Oxygen or Toxic Gas
BAR CODE IIIIIIIIII
www.g-tecta.com
G-TECTA SG
™
Baseefa09ATEX0244
Ex ia IIC T4 Ga -4F/-20ºC ≤ ta ≤ 149F/65ºC
The Linde Group, GU2 7XY, UK
N694
1180
II 1G
IECEx BAS 09.0116
Safety and Warning information
WARNING
Read and understand all
instructions in the operation section of this
operating manual before use.
WARNING
Do not substitute components
as this may impair intrinsic safety and invalidate
warranty.
WARNING
Observe all warnings and
instructions marked on the instrument and within
this operating manual.
WARNING
Observe site health and safety
procedures for gases being monitored and
evacuation procedures.
WARNING
Make sure you understand the
alarm warnings.
WARNING
If this product is not working
properly, read the operating manual or call
The Linde Group.
WARNING
The accuracy of G-TECTA® SG
instruments equipped with a toxic gas sensor
should be checked periodically with known
concentration calibration gas. Failure to check
accuracy can lead to inaccurate and potentially
dangerous readings. G-TECTA® SG instruments
equipped with an oxygen sensor should be
periodically calibrated in fresh air.
WARNING
Ensure maintenance and
calibrations are carried out in accordance with the
procedures in the operating manual.
WARNING
The equipment is not certified
for use in atmospheres containing more than 21%
oxygen.
WARNING
G-TECTA® SG portable gas
detectors have been designed for the detection
of either oxygen deficiencies or specific toxic gas
accumulations. An alarm condition indicates the
presence of a potentially life threatening hazard
and should be taken very seriously.
WARNING
Ensure only qualified service
personnel change sensors, batteries and operating
system.
WARNING
Only charge batteries in safe
(non-hazardous) areas.
Instructions – specific for use in
hazardous areas
The following instructions apply to
equipment covered by certificate numbers
Baseefa09ATEX0240 Flammable Gas
Baseefa09ATEX0244 Oxygen or Toxic Gas.
The following information covers all relevant points
listed in clause 1.0.6 of the Essential Health & Safety
Requirements of the ATEX directive.
1. The certification marking is as follows:
UK
4
3. The equipment is certified for use in ambient
temperatures in the range –20°C to +65°C
(-4 to +149 F). The equipment should not
be used outside these ranges. Toxic and
Oxygen sensors are not rated for continuous
operation at high temperatures greater than
40°C (104°F).
4. Compliance with Essential Health and
Safety Requirements has been assured by
compliance with EN60079-0:2004 + Amds 1
& 2, EN60079-1:2004 and EN60079-11:2006,
as certified by Baseefa. Compliance with gas
detection performance standards EN50054,
EN50057, EN61779-1 and EN50104 has been
certified by Lloyd’s Register. EMC compliance
to EN50270 has been certified by 3C Test Ltd.
5. Repair of this equipment and gas sensor
replacement shall be carried out by the
manufacturer or approved service centre in
accordance with the applicable code
of practice.
6. If the equipment is likely to come into contact
with aggressive substances, then it is the
responsibility of the user to take suitable
precautions that prevent it from being
adversely affected, thus ensuring that the
type of protection is not compromised.
7. The rechargeable battery must only be
charged in non-hazardous (safe) areas by
connection to the specified Linde charger.
Rechargeable batteries can only be replaced
by a Linde Group Authorised Service Centre.
8. Only the following CR2477 battery types are
approved for use in the battery compartment
of the non rechargeable product variants:
Panasonic, GP, Energiser and Maxell. Do
not use Duracell batteries. Batteries must
only be changed in a non-hazardous
(safe) area. Users can only change non
rechargeable batteries in G-TECTA
®
SG instruments.
9. The equipment is not certified for use
in atmospheres containing more than
21% Oxygen.
Area Classifications
Zone 0: An area classified as Zone 0 will always
have ignitable concentrations of flammable
gases, vapours or liquids present under normal
operating conditions.
Zone 1: An area classified as Zone 1 is likely to
have ignitable concentrations of flammable
gases, vapours or liquids present under normal
operating conditions.
Zone 2: An area classified as Zone 2 is not likely
to have ignitable concentrations of flammable
gases, vapours or liquids present under normal
operating conditions.
Instructions – specific for use
in non-hazardous areas
G-TECTA® SG CO2 Personal Detector
The G-TECTA® SG CO2 personal detector uses an
infrared gas sensor for CO2 detection. This version
of G-TECTA® SG is not designed or certified for
use in hazardous areas, and the intrinsic safety
information for this instrument is not applicable.
Operation and maintenance of the G-TECTA® SG CO2
is essentially the same as for other G-TECTA® SG
instruments but with the following points to note.
CO
2
is present in ambient air at a background
concentration of just under 400ppm (0.04%).
In any enclosed environment the ambient
CO2 concentration will increase as a result of
people or animals breathing and if the room is
poorly ventilated concentrations well in excess
of 1 000ppm (0.1%) can occur. CO2 levels in
the outdoor air will also be enhanced by any
emitted CO2 e.g. from vehicle exhausts or boiler
flues venting to atmosphere so it is normal to
see fluctuating levels of CO2 on the instrument
display whether indoors or outside.
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UK
G-TECTA® SG Premium
Single Gas Detection Instrument
Introduction
G-TECTA® SG is a Premium Single Gas Detection
Instrument, designed to be carried or worn by
individuals working in potentially hazardous
environments. G-TECTA® SG is certified for use in
classified hazardous areas and monitors a single gas
by displaying a reading on the instrument screen.
Alarm warnings are transmitted by means of a loud
audible alarm, a bright visual alarm of blue/red
flashing LEDs and an internal vibrating alarm.
Sensors
G-TECTA
®
SG can be specified with a wide
range of intelligent gas sensors. The sensor
is fitted to an intelligent processor which
contains calibration and sensor information.
The G-TECTA® SG can be reconfigured at any time by
replacing the pre-calibrated intelligent sensor with
an alternative gas type. Sensors should be replaced
by trained service personnel and are easy to fit
using “plug and play” technology. The intelligent
sensor is immediately recognised by
the instrument and is ready to use after
instrument calibration.
Key Features
G-TECTA
®
SG has been designed to be a reliable
and robust personal monitoring system, whilst
being small, light and easy to use. The instrument
is water and dust tight to IP65 and IP67 ratings. The
G-TECTA® SG’s shape and design ensures high levels
of user comfort and minimal interference with the
user’s normal work function. The non-slip grip and
alligator clip ensure secure handling and wear
ability and additional accessories such as shoulder
straps and chest harness allow flexible wearing
options if desired.
The G-TECTA
®
SG has a single mode button and a
high quality display with automatic backlight. The
instrument continuously monitors the gas level in
the environment providing current, peak, and time
weighted average (TWA) readings for the user.
The G-TECTA
®
SG can be configured by utilising
Linde G-TECTA® PC software. Data and event
logging can also be downloaded and managed
whilst the instrument is being charged via the
optional charger with communication link.
Software
The instrument software has been written in
accordance with IEC 61508 to ensure quality and
integrity in operation. The internal circuitry monitors
for any malfunction and will display an error
warning to the user in the unlikely event they occur.
Batteries
G-TECTA® SG is battery operated and is available
with the option of rechargeable batteries or
replaceable alkaline batteries*
Battery Check
The G-TECTA
®
SG has two battery options: Li-ion
rechargeable or non-rechargeable batteries.
Rechargeable Units
G-TECTA
®
SG uses a Li-ion battery pack and should
arrive with sufficient charge so that the unit can be
used straight out the box. However, to attain the
full operating time you should charge the battery.
(The actual operating time will depend on the types
of sensor installed.) The flammable G-TECTA® SG
will operate for at least 12 hours on a fully
charged battery.
WARNING
Rechargeable units
Only recharge the battery in a safe (non-hazardous)
area with a Linde G-TECTA® SG charger. Failure to
comply could invalidate safety certification and may
result in permanent damage to the instrument.
WARNING
Non-rechargeable Units
G-TECTA® SG uses a CR2477 battery. To maintain
compliance with instrument certification, ensure
only the following battery types are used:
Panasonic, GP, Energiser, and Maxell.
* LEL sensor instruments are not available
with alkaline batteries
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G-TECTA® SG – Product Features
Operation
Switching On
The G-TECTA® SG is designed to be very easy to
operate. Please follow these simple steps to ensure
your instrument is ready for use:
Step 1
WARNING
Ensure the instrument is in
clean air.
Step 2
Press and hold the mode button for approximately
3 seconds until the red LED flashes on the
instrument. The display screen will light up and
the instrument will begin its start up sequence.
G-TECTA
®
SG Start-Up Sequence
The instrument will test the alarm LEDs, the alarm
sounder, the vibration alarms and the display
screen. The sounder may be silenced by pressing
the mode button once.
The instrument will continue through a start
up sequence as shown below, this will take
approximately 20 seconds.
Note: During the start up sequence, check the
battery status symbol to ensure you have enough
battery charge to use the instrument.
Calibration Check
If the instrument is due for calibration in less than
31 days “CAL xx” will be displayed, where xx is
the number of days to the next calibration. When
the date has expired, G-TECTA
®
SG will display the
warning message “CAL”.
When “CAL” is displayed the instrument can
still function as a standard feature, although we
strongly recommend that the instrument is sent
for calibration as soon as possible. Press the mode
button to continue to normal operating mode.
Note: G-TECTA® SG can be set to lock in the event of
the CAL date expiring by using G-TECTA® PC software.
Auto Zero
The Auto Zero function is enabled as a default
setting*. During start-up, the instrument will display
the Auto Zero confirm screen and the display will
alternate between “Zero” and “????”. Press the
mode button to activate the Auto Zero function.
Note: The instrument will time out in 10 seconds then
change to normal operating mode, without performing
an auto zero, if the mode button is not pressed.
Switching Off
Press and hold the mode button for 5 seconds,
the display will count down until the display shows
OFF. If you release the mode button during the
countdown, the G-TECTA® SG will return to normal
operating mode.
* The Auto Zero setting can be configured to operate
automatically, on user confirmation (default), or disabled,
using G-TECTA
®
PC software (see page 15).
OK
vv/v
ppm
ppb
0.0
ppm
OK
OK
ppm
Autozero confirm
OK
No Autozero
Mode
Button
Gas Name
Gas
Sensor
Sounder
Outlet
Alarm
LEDs
Display
Screen
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Instrument Storage
In order to optimise sensor performance and lifetime,
your G-TECTA® SG instrument should be stored in a
safe, non-hazardous area. The area should be clean
and dry, between temperature ranges 0-30°C, and at
a humidity level of 20-90%RH.
Normal Operation and Confidence Signals
The gas reading is displayed from the sensor
channel in the G-TECTA
®
SG instrument.
The screen will display the current level of gas, the
unit of measurement and the battery status. The
“ok” symbol will flash, indicating the instrument is
operating correctly.
Always check the gas type being monitored by your
instrument and ensure you have been trained on
your site health and safety procedures.
Confidence Signals
To give you added confidence the instrument is
operating correctly, the G-TECTA
®
SG will (every 10
seconds):
1. Sound a short beep
2. Flash a blue LED
In addition the “ok” icon will flash on the display
Display Symbols
Battery
When the battery is fully charged, the battery icon
will show 3 black bars. When the battery is empty,
the battery icon flashes and the instrument will
sound warning beeps.
WARNING
When the battery charge is
completely empty, G-TECTA® SG will switch
off automatically.
TWA Alarm
The TWA alarm for toxic gases will operate when
the short-term (15 minute) or long-term (8 hour)
time weighted average alarm levels are exceeded.
The G-TECTA
®
SG will display “SWTA” (15 minutes)
or “LTWA” (8 hours).
WARNING
TWA alarms cannot be
cleared. TWA alarms are functional for toxic gas
instruments only.
Display Menu Options
The G-TECTA
®
SG menu is displayed when you press
the mode button twice. There are up to 4 menu
options. To scroll between the different options,
press the mode button once. To select the menu
option you require, double click on the selected
icon. When the Peak and TWA menu options are
selected the relevant icon will be displayed on
the screen.
Peak
The Peak menu option displays the highest gas
level for flammable and toxic gases, or the lowest
level of oxygen, since the instrument was switched
on or was last reset.
The Peak feature is mainly used for confined space
entry checks, where the instrument is lowered into
a potentially hazardous environment (instead of
using a sampling tube), and also for viewing peak
gas exposure at the end of a shift.
TWA
The TWA menu option alternatively displays the 15
minute and 8 hour time weighted average reading
for toxic gases since the unit was switched on.
Peak Reset
The Peak Reset menu option clears the current
peak value in the instrument. The Peak value
should be cleared before any confined space
entry tests are performed.
Zero
The Zero menu option will reset the sensor in the
instrument. When the zero function has been
completed, the instrument will return to normal
operating mode.
WARNING
Always ensure you are in fresh
air when using this feature. Zeroing an instrument
in a contaminated atmosphere could result in
incorrect gas readings.
!
Full
0.0
OK
ppm
0.0
OK
ppm
0.0
OK
ppm
Peak display
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Alarms
G-TECTA® SG has two instantaneous alarm level
settings, AL-1 and AL-2.
Alarm signals
The red and blue alarm LEDs will flash, the sounder
will emit a loud, fast series of beeps and the internal
vibrator alarm will activate. The display will show
the gas level and the alarm level alternatively.
Note: For any gas, there are normally 2 alarm levels
– these are indicated by the alarm icons:
The G-TECTA® SG is set to “latch” the alarm by
default. This means that the instrument will continue
to alarm until the operator presses the mode button.
Once you have evacuated the dangerous area,
press the mode button on the G-TECTA
®
SG
instrument; this will reset your G-TECTA® SG
to normal operating mode. If the G-TECTA® SG
continues to alarm, i.e. you are still in a dangerous
area, pressing the button will have no effect.
TWA Alarms
For toxic gas sensors, there are also two time
weighted average alarms (TWA). The TWA alarm
for toxic gases will operate when the short-term
(15 minute) or
long-term (8 hour) time weighted
average alarm levels are exceeded.
The G-TECTA® SG
will display “SWTA” (15 minutes) or “LTWA”
(8 hours) with toxic gas levels.
WARNING
TWA alarms are functional for
toxic gas instruments only.
WARNING
The 8 hour TWA alarm cannot
be cleared.
Flammable Over-range Alarm
If flammable gas levels exceed 100% LEL,
G-TECTA
®
SG locks into alarm and displays “9999”
showing an over-range condition. G-TECTA® SG will
temporarily cut off power to the sensor to prevent
burn out, and display a progress bar for 200
seconds. When the power timeout is complete,
the mode button should be pressed to put the
instrument back into normal operating mode. The
G-TECTA® SG can optionally be configured to force
the operator to switch the instrument off and
on to restart. This option is programmable with
G-TECTA® PC Software.
Note: All alarm configurations can be set with
G-TECTA
®
PC Software.
WARNING
If the sensor power is
reconnected when the unit is exposed to an overrange gas concentration there is a risk of damage
to the pellistor sensor.
WARNING
Depleted oxygen levels can
reduce the flammable gas reading. If oxygen
levels are below safe breathing limits it should be
assumed that the flammable reading is low.
Instrument Settings
The following instrument settings can
be altered using G-TECTA® PC Software:
Alarm Levels for the Sensor
Level 1 and level 2 alarms can be set for
the gas sensor.
Alarm Trigger
The alarm trigger can be set for rising levels of
gas (toxic and flammable), or for falling levels of
gas (oxygen deficiency monitoring).
Alarm Latching
Latched alarms require the operator to press the
mode button to clear the alarm (default setting).
The alarm can be set to be latched or unlatched.
Unlatched alarms will clear automatically when
the gas hazard has passed.
H S
2
ppm
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