LI-COR LI-600 - RH Sensors

LI-600 Porometer/Fluorometer Instruction Manual
8-10
This section describes the process of setting the available
parameters for each sensor.
To view user calibration coefficients and change the
user-adjustable parameters, connect the LI-600 to the
computer software. In the drop-down menu on the Tool-
bar, select Instrument Calibration. (For sensor equa-
tions, see Theory of operation on page9-1)
All calibration coefficients can be viewed in Factory
Calibration if enabled in the software Preferences. See
Drop-down menu on page4-3.
RH sensors
RH sensor parameters include Zero, or the sensor’s
response to dry air, and Span, or the sensor’s response to
a known dew point or H
2
O mole fraction.
Using the LI-600 pump
Take the following steps to dry the RH sensors using the
internal pump and zero kit.
1 Power off the LI-600.
2
Remove the shells (see Removing the instrument head shells
on page8-5).
3 Remove the filter cover and filter.
The H
2
O buffer material is in the flow path and
must be removed to zero the RH sensors. Remove
the filter cover and filter using gloves or tweezers.