LI-COR LI-6400, Manual

Page: 82 / 846

Guided Tours
Tour #3: Controlling Chamber Conditions
3-30 Using the LI-6400
3
1 Fixed Flow at 400, Desiccant mid-range. Pick a target.
Press
2 f2 F 400 enter
. Note the RH value ( RH_S_% , line b ). WeÕll use this val-
ue (to the nearest 1 or 2) for the target in the next step.
2 Constant RH
Switch to fixed RH mode, enter the target value(
2 f2 R enter
<value>
enter
).
3 Turn on the strip charts
Press 4 , then f1 . You should see something like Figure 3-23.
After youÕve admired the curve for 15 or 20 seconds, continue on with the
next step.
4 Turn the desiccant to full bypass
Moister air will enter the chamber, so flow must increase to maintain the tar-
get humidity.
5 Wait about 15 or 20 seconds, turn to full scrub
The flow drops to a new value, but humidity stays the same.
6 Change to medium response, and repeat Steps 4 and 5.
Press escape to stop viewing the graph. Press 2 , then f1 to drop the response
from fast to medium . Resume watching the graph by pressing
4
, then
f3
.
Figure 3-23. When strip charts are first turned on. The RH plot will pick the axes
limits based on the data and keep the range at 5, while the flow plot uses specified,
fixed limits.
Y axis label Y axis min, max