Vaisala DPT145 - Manual (Page 23)

Chapter 4 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 23
Warning – Read Before Installation
CAUTION
Do not drop or hit the transmitter. The sensor is fragile
and may break from a sudden shock.
When transporting the transmitter, use the original
shipping box from Vaisala.
CAUTION
Do not open the connection between the adapter and
the transmitter. They are connected at the factory, and
the connection should remain unopened to guarantee
tightness.
Use tools only on the nut of the adapter, where the
transport protection cap is connected.
NOTE
Keep the transmitter dry and clean.
Do not remove the yellow transport protection cap
before you are ready to install the transmitter.
Uncapped transmitters will absorb moisture which will
affect the dewpoint measurement.
NOTE
Connect the transmitter directly to the main SF
6
gas volume, not behind a sampling line.
After installation, the transmitter will have a small
amount of moisture inside it. In still, dry gas it takes a
long time until vapor pressure inside the measurement
cell reaches equilibrium with the main gas tank. It is
not unusual for the stabilization of the dewpoint
reading to take several days after installation.