COSA Xentaur Xentaur LPDT - Manual (Page 28)

Section 3: Instrument
page 21
3.4.4.3 Start Calibration (SpanCheck™) Mode
The instrument is calibrated at the factory with the sensor it
is shipped with and does not need to be re-calibrated prior
to installation.
Instrument calibration is recommended in approximately 12
month intervals, and the XTR65W sensor should be re-cali-
brated after prolonged exposure to liquid water. Simply fol-
low steps 1 - 7 of the procedure below, removing the sensor
from the sample gas stream. Make sure the gas stream is
depressurized before removing the sensor to avoid injury.
It is recommended to keep the sensor exposure to room air
as short as possible to avoid super saturation of the sensor.
While super saturation is not damaging to the sensor, it will
prolong the initial dry-down time after you install the sensor
in the sample stream. Therefore, remove the sensor from the
packaging container only after you are ready to proceed
with the calibration procedure and install the sensor in the
sample stream immediately after the calibration procedure
is completed. If you are not ready to use the sensor right
away after calibration, put the sensor back in the shipping
container for dry storage.
The instrument must be calibrated with the sensor it will be
used with. The calibration procedure takes advantage of the
designed saturation level (DSL) feature of the sensor and is
executed by the instrument computer, by performing the fol-
lowing steps:
1. If the instrument is locked and a calibration is
attempted; it will display
/2& and will not perform the
calibration. To unlock the instrument consult section
3.4.5.9.