Vaisala PTB330 Manuel d'utilisateur Page 29

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Chapter 3 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 27
6. Mount lower part (item 5) on the housing.
7. Push the seal with the contact socket of the gland and (item 2+3)
flush into the lower part (item 5).
8. Screw the domed cap nut (item 1) onto the lower part (item 5).
Grounding the Barometer Housing
If you need to ground the barometer housing, the grounding connector
is found inside the housing. Make sure that different groundings are
made to the same potential. Otherwise harmful ground currents may
be generated.
If a galvanic isolation of the power supply line from the output signals
is needed, the barometer can be ordered with an optional output
isolation module. This module prevents harmful grounding loops.
Alternate Wiring Systems
There are four ways of powering the barometer: using basic wiring,
the D-9 connector, the M-12 connector, or the optional external AC-
adapter.
The wiring system is selected when ordering the device. If a connector
is needed for wiring, it is set at the factory.
- When using basic wiring, see section Signal and Power Supply
Wiring on page 28.
- When using 8-pin connector, see section M-12 (8-Pin) Connector
on page 30.
- When using D-9 connector, see section D-9 Connector on page 31.
- When using an optional external AC-adapter.
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