LI-COR LI-600 - Page 95

LI-600 Porometer/Fluorometer Instruction Manual
8-16
path. This ensures that no water remains in the sys-
tem.
Dry the sensors using one of two methods: using
user-supplied airstream or using the LI-600 pump. If
drying the sensors by delivering an airstream across
the sensors using either a tank of dry gas (recom-
mended) or an alternate airstream method, see Using
a user-supplied airstream on page8-13. If delivering air-
flow across the sensors via the LI-600 pump only, see
Using the LI-600 pump on page8-10. If the resulting
RH is <1% and trending down after several minutes,
the zero does not require resetting.
2 Open Instrument Calibration.
Connect the LI-600 to a computer via USB then open
the computer software. Click the drop-down menu
on the Toolbar then select Instrument Calibration.
3 Power off the pump and power on the blower.
Select RH Zero then click Begin RHZero Cal-
ibration to view the RH Ref and RH Sample. Click
TURNPUMP OFF then click
TURNBLOWERON.
4 Zero the RH sensors.
When the RH stabilizes, click Zero for RHRef then
again on the confirmation prompt to reset the zero.
Click Apply on the second confirmation prompt to
finish. Repeat for RH Sample.
RHsensor span
A known H
2
O input is required to span the RH sensors
using another H
2
O analyzer or a dew point generator.
Take the following steps to span the RHsensors.