Chapter 4. Using Special Features
56
Model PM880 Portable Hygrometer User’s Manual
4.8.1 Entering a Saturation Constant
The PM880 requires a saturation constant in order to calculate ppm
w
in
non-aqueous liquids. If you do not know the saturation constants of the
process liquid sample, contact the factory. To enter a saturation constant
(Cs), you must enter 1 to 8 data points to represent a curve of Cs (values)
versus temperature.
To enter data for a saturation constant:
1.
If the menu is not active, press
[MENU]
.
2.
Use the arrow key to scroll to
Program
and press
[ENTER]
.
3.
Use the arrow key to scroll to
Calibrate
and press
[ENTER]
.
4.
Use the arrow key to scroll to
Saturation
tab and press
[ENTER]
. A
screen similar to Figure 23 appears.
Figure 23: Saturation Window
