Vaisala HMP260 - Manual (Page 19)

HMP260 SERIES
HMP260-U017en-1.5 Operating Manual
1997-11-25 13
NOTE
When the cable is grounded as above, 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. The
transmitter housing must be grounded via the
grounding terminal located at the lower right hand
corner of the housing. In addition to this the
negative terminal of the power supply must be
grounded. If these groundings have not been made
correctly, the transmitter does not work.
HMP26x
Hazardous
area Power
supply
The electrical safety of the grounding must comply with the EN 50014/13
standard. When compliance with Factory Mutual Standards is required, the
grounding must comply with ANSI/ISA RP 12.6 and ANSI/NFPA 70.
WARNING
Always use the grounding terminal to connect the
transmitter to safety ground.
3.4. Electrical connections
CAUTION
All the component boards are grounded via the housing
frame. Make sure that the fixing screws of the boards
are firmly tightened before connecting the cables.