Vaisala Drycap DMT142, Руководство пользователя

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Chapter 4 ________________________________________________________________ Installation
VAISALA________________________________________________________________________ 13
Mounting
The recommended installation is directly to the measured gas pipeline,
chamber etc. If the gas temperature is higher than the specified
maximum operating temperature of the transmitter, gas sampling and
cooling it to ambient temperature is recommended. Note that the
dewpoint temperature must be clearly lower than the ambient
temperature to avoid condensation in the sampling line. Sampling
from the process is easy by using Vaisala sampling cell options.
Direct Measurement in Process
Pipeline
Direct installation to the measured gas is the recommended
installation method if the temperature of the gas is suitable for
DMT142 and no additional filtering is needed due to very dusty or
oily gas. Oil as such is not harmful for the DRYCAP
®
sensor, but
response time may be slowed down if the sintered filter becomes
clogged up with oil. The maximum measurement pressure is
50 bar
a
/ 725 psi
a
(absolute pressure) for direct measurement.
Max 50 bar
0507-102
Figure 10 DMT142 Installed Directly to Pipeline
In addition, due to the small size of DMT142 you can use a standard
G1/2" T-shaped pipe fitting (not available from Vaisala) when
installing DMT142 into a pipeline.