Vaisala HMP240 User Manual
Page 16
HMP240
User's Guide
M210300en
14
•
tighten the nut
•
connect the wires into the screw terminals and fasten a cable tie
around the wires
transmitter housing
cable tie
gland
brass disks
rubber ring
nut
NOTE
When the cable is grounded as explained on the
previous page, the metallic parts of the sensor head, the
shield of its cable, the transmitter housing and the
shield of the signal cable to external system are all
connected to each other. After this the whole system
can be grounded from one point only. If the grounding
is made via several points (sensor head, transmitter
housing, signal cable), make sure that the different
groundings are made to the same grounding potential.
Otherwise harmful grounding currents may be
generated. If you do the grounding via the transmitter
housing, use one serrated lock washer between a mount-
ing screw and the housing; the lock washer breaks the
paint on the housing.