Linde G-TECTA SG, Руководство по эксплуатации

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UK
4. Press the mode button to confirm Calibration
within 10 seconds.
Note:
If the mode button is not pressed within
10 seconds then the instrument mode will change
to Gas Test Mode.
5. G-TECTA
®
SG will display a progress bar.
6. Apply the gas whilst the progress bar is
counting down. G-TECTA
®
SG will display
‘PASS’ or ‘FAIL’.
Note: You can abort the Calibration test by
pressing the mode button at any time whilst the
test is in progress.
The G-TECTA
®
SG instrument will adjust the value on
the gas sensor to match the stored calibration gas
value within the sensor module. If the G-TECTA
®
SG
unit does not calibrate successfully, G-TECTA
®
SG
will display ‘FAIL’. Your G-TECTA
®
SG unit must be
re-calibrated or the sensor replaced.
Gas Test ‘pass’ and ‘fail’ and calibration ‘pass’ and
‘fail’ values are stored in the Event log.
WARNING
 One button Calibration will
check for small drifts of stored calibration value.
The Linde Group recommends G-TECTA
®
SG is sent
for full certified calibration at six monthly intervals.
G-TECTA Ozone Instrument
Due to the reactive nature of ozone (O
3
) special
procedures should be followed when calibrating
gas detectors that incorporate an ozone sensor.
Fittings
For ozone calibrations all fittings and pipe work
should be stainless steel, brass, aluminium or PTFE.
Fittings or pipe work in other plastic materials such
as Tygon must not be used.
Gas flow rate
It is important that the flow rate is set correctly as
otherwise pressure effects may distort calibration
values and prevent the gas detector from working
correctly. To calibrate, the flow rate should be set
between 0.8-1.0 litres / minute (0.03-0.04 cubic
feet / minute)
Normal safety precautions for handling ozone
should always be observed along with any special
instructions that accompany the calibration gas
cylinder or generator being used.
G-TECTA
®
SG CO
2
Instrument*
When G-TECTA
®
SG CO
2
is zeroed in fresh air it
automatically sets the CO
2
baseline level to 0.04%.
When zeroing the instrument in air, ensure you are
outside in clean air well away from a building or
any CO
2
emissions. Please ensure the instrument
is held well away from the breathing zone of
the operator.
G-TECTA
®
SG CO
2
can also be set to zero in nitrogen
by using G-TECTA
®
PC software.**
This is a zero point calibration rather than a
normal zero. In the PC software, set the calibration
value to 0.00%, apply nitrogen gas and click the
Calibrate button.
Note:
After the zero point calibration is completed,
remember to re-set the calibration gas level to its
previous level.
* Also read the section – Instructions – specific for use in non-hazardous areas (Page 4)
** Recommended calibration gas is 2% CO
2
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.