G-Tecta 4G Instrument With Ozone ) Sensor; G-Tecta ® 4G Instrument With Co 2 Sensor - Linde G-TECTA 4G Operating Manual

G-TECTA 4G Instrument with Ozone
(O ) Sensor
3
Due to the reactive nature of ozone (O
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.
For calibrating the ozone sensor, the special flow
cap assembly marked "Ozone Only" (article number
AS4G2009) must be used.
Note: The standard flow cap assembly supplied
with the instrument must be used for calibrating
the other gas sensors.
* Please also see the section – Instructions – specific for use in non-hazardous areas (Page 4)
** Recommended calibration gas is 2% CO
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.
) special
3
in a background of nitrogen with a regulated flow of 0.5 l/min (1 SCFH). Care should be taken to
2
G-TECTA 4G Instrument
®
with CO Sensor*
2
When a G-TECTA 4G CO
®
in fresh air it automatically sets the CO
level to 0.04%. When zeroing the instrument in air,
ensure you are outside in clean air well away from
buildings, vehicles or any CO
ensure the instrument is held well away from
the breathing zone of the operator.
A G-TECTA 4G CO sensor can also be set to
®
2
zero in nitrogen by using G-TECTA
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.
sensor is zeroed
2
baseline
2
emissions. Please
2
PC software**.
®
15