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CheckPoint O
/CO
2
Calibration
CheckPoint O
/CO
2
2
atmospheric air (20.9 % O
100 % CO
.
2
If CheckPoint does not show approx. 20.9
% O
(between 21.3 % and 20.5 %) when
2
measuring atmospheric air, calibrate
CheckPoint with atmospheric air.
If CheckPoint indicates a value that
deviates by more than 2-3 % when
measuring gas with a known CO
calibrate CheckPoint with 0 % CO
% CO
.
2
Calibration with air (20.9 % O
The needle must only suck air when
calibrating with air.
Calibration with 0 % CO
Before calibrating with 100 % CO
must calibrate with 0 % CO
calibration gas must not be forced through
the CheckPoint. Let the needle suck the
gas from an overflow to which between 0.2
and 1.0 l/min is supplied.
Note: In connection with 0 % CO
calibration, 100 % N
content can be used. When using
atmospheric air for 0 % CO
that there are no increased or unstable
CO
concentrations in the air, as this may
2
result in erroneous measuring at relatively
high CO
measurements. Carry out any
2
such calibration far away from the CO
application area, and ventilate CheckPoint
thoroughly using atmospheric air by
carrying out 5 measurements with "clean"
atmospheric air before calibrating with 0 %
CO
.
2
PBI-Dansensor A/S
2
can be calibrated with
), 0 % CO
and
2
2
content,
2
or 100
2
):
2
and 100 % CO
2
you
2
. The
2
2
and air with a known
2
, please ensure
2
2
COPYRIGHT ©
EN
Start calibration
Press the
key, and hold it down. Press
, and release both keys. Throughout the
calibration process the CheckPoint
measures the calibration gas and
automatically determines whether 20.9 %
O
, 0 % CO
or 100 % CO
2
2
supplied.
CheckPoint shows the calibration gas
supplied in the display: In case of 20.9 %
O
it switches between "CAL." and "20.9",
2
in case of 0 % CO
"CAL." and "0.0", and in case of 100 % CO
it switches between "CAL." and "100".
Check that CheckPoint has determined the
calibration gas supplied. If CheckPoint has
chosen the wrong calibration gas it is
important to interrupt the calibration
:
process or manually select the correct
2
calibration gas. Calibration takes 25
seconds.
Manual selection of calibration gas
When calibrating, you can select the
calibration gas (20.9 % O
% CO
) manually by pressing
2
Pressing
+
gases.
Stop calibration
Press
to interrupt the calibration
process.
User Manual
(2) +
(3) :
is being
2
it switches between
2
, 0 % CO
or 100
2
2
+
again.
switches between the
PBI-200616-G 03/2010
13
2
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