54
NOTE
: If using retractable needle-type sensors (e.g.
OXR50
,
OXR230
,
OXR430
), it is important that the sensor tip is extended to
position 2 or 3 (see chapter 5.1) when the calibration value is taken.
7.1.3
Calibration Mode: 1-Point in Water or Humid Air
NOTE
: The calibration
1-Point in Water or Humid Air
is only
possible if the
correct Sensor Code
has been entered in the
Settings
(see chapter 6.2).
The calibration mode
1-Point in Water or Humid Air
uses air
saturated water or water-vapor saturated air for determining the
air calibration value. The preparation of appropriate air calibration
standards is explained in chapter 8. The 0% calibration value is
taken from the
Sensor Code
.
Note, that this calibration mode will automatically read the
atmospheric pressure from the internal pressure sensor in the
FireStingO2
. The calibration standard with the air saturated water
or water-vapor saturated air must be therefore exposed to the
same atmospheric pressure (which is given in typical applications
2
).
2
In rare cases and for special applications the calibration standard might be exposed to different
pressures than the ambient air where the
FireStingO2
is positioned. In this case you have to choose the
Custom Mode (chapter 7.1.6) where the calibration pressure can be entered manually.
