Application of the Hygrometer (900-901D1)
A-31
4/9/98
B: SPECIAL CASE (cont.)
Typical Problems
1.
Find the moisture content in benzene, at an ambient
temperature of 30°C, if a dew point of 0°C is measured with
the GE Panametrics hygrometer.
a.
From the literature, it is found that C
S
for benzene at a
temperature of 30°C is
870 PPM
W
.
b.
Using a straightedge on Figure A-2, connect the 870
PPM
W
saturation concentration with the 30°C ambient
temperature and read the Henry’s Law Constant of
27.4
on
the center scale.
c.
Using the straightedge, connect the above K value of 27.4
with the measured dew point of 0°C, and read the correct
moisture content of
125 PPM
W
where the straightedge
crosses the moisture content scale.
2.
Find the moisture content in heptane, at an ambient
temperature of 50°C, if a dew point of 3°C is measured with
the GE Panametrics hygrometer.
a.
From the literature, it is found that C
S
for heptane at a
temperature of 50°C is
480 PPM
W
.
b.
Using a straightedge on Figure A-2, connect the 480
PPM
W
saturation concentration with the 50°C ambient
temperature and read the Henry’s Law Constant of
5.2
on
the center scale.
c.
Using the straightedge, connect the above K value of 5.2
with the measured dew point of 3°C, and read the correct
moisture content of
29 PPM
W
where the straightedge
crosses the moisture content scale.
Содержание PM880
Страница 1: ...PM880 Portable Hygrometer ...
Страница 38: ...August 2003 2 18 Initial Setup Keypad cont Figure 2 8 The PM880 Keypad ...
Страница 150: ...August 2003 8 4 Servicing the PM880 Printing Reports cont Figure 8 3 Printout of a Typical Drive Report ...
Страница 237: ...5 August 2003 Index cont K K PPMv 3 17 Keypad Description 2 17 Key Description 2 17 Keys Description 2 17 ...
