Linde G-TECTA 4G Operating Manual page 13

The Linde Group recommends a bump test each
time G-TECTA 4G instruments are used or issued for
®
use. As a minimum, a monthly bump test is required
to confirm sensor operation. Test gases of known
composition (compatible with the settings on the
instrument sensor modules) need to be applied,
to verify sensor response and alarm function.
Note: Please see The Linde Group data sheet
"Gas Detector Calibration Frequency" for further
advice on bump testing and calibration.
The Linde Group manufactures and supplies
Gas Test Cylinders under numerous global product
brands, including Linde, BOC, AGA, Afrox etc.
The Linde Group gases supplied for use with your
G-TECTA 4G gas detection instruments are specially
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formulated, high stability long life multi-gas mixes.
The G-TECTA 4G instrument will determine Pass/
®
Fail status for the gas test.
In order to perform successful gas tests ensure:
• The gas used has the recommended gas
concentration and it is within the validity date
specified by The Linde Group
• The gas flow path is leak tight. It is important to
check that the flow cap is properly fitted to the
G-TECTA 4G instrument, the outlet hose is
®
not restricted in any way, nor additional hose
length used
The G-TECTA Gas Test Kit comprises a full gas
®
cylinder and regulator with interconnecting hose, a
gas test key (used to activate Gas Test Mode on the
instrument), a flow cap to attach to the G-TECTA
4G, and a vent line. The Gas Test Kit is supplied in a
convenient carry case.
How to Perform a Gas Test
1. Ensure the G-TECTA
normal operating mode.
2. Fit the flow cap onto the front of the sensors
and attach the hose from the regulator. Attach
the outlet hose to 'vent gas away' – do not
extend this hose, restrict or allow kinks.
3. Swipe the Gas Test Key over the Linde label
on the front of the instrument. The G-TECTA
will activate the Gas Test Mode and show TEST
and "x" next to the sensors on the display.
4. G-TECTA 4G will display a progress bar.
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5. Apply the gas whilst the progress bar is
counting down.
6. Wait for the progress bar to complete
(40 seconds). G-TECTA
" " or "x" against each sensor and a master
" " or "x" to indicate PASS or FAIL.
In the event G-TECTA
please see the troubleshooting guide
(Page 17) or contact The Linde Group.
7. To abort the gas test press the mode button at
any time whilst the test is in progress.
Instrument Calibration
Calibration of the gas sensor should be performed
regularly every 6 months. Over time the accuracy
of the gas sensor can drift outside of what is
considered a safe range and regular calibration is
essential to ensure accuracy of gas readings.
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4G is switched on and in
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4G will display a
®
4G displays FAIL,
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4G
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