C
−
102-1-E
12
6. WIRING CONNECTIONS
6.1 Power and Output Signal Wiring Connections
Terminals for wiring connections are found at the back of transmitter housing. Remove the cover and make wiring connections.
Terminal block
cover
(1) Using hex wrench, loosen the locking setscrew
(M4 hex socket head) securing the cover.
Terminal block cover
Turn
A flat tool that does
not damage the finish
(2) Using a flat tool, carefully loosen the terminal
cover by rotating it counterclockwise and turning
further by hand until it comes off.
(3) Separating the cover provides access to the
terminal board with cable entrance openings,
internal earth ground terminal and terminal
blocks for power and output signals.
Fig.6.2 Terminal Block Cover Removal
Fig. 6.3 Terminal Board
Fig. 6.1
5. GROUNDING
The electromotive force detected across electrodes of the probe is a very weak voltage measured against the
reference potential of metered liquid. Accordingly, earth grounding (better than Class C grounding) is essential to
maintain the probe and metered liquid at the same potential. Illustrated below are the proper grounding procedures.
CAUTION: Do not connect to earth ground of heavy electrical equipment.
Connect the ground wire for the transmitter to external ground terminal or internal
ground terminal.
GND terminal
Probe
Metal
pipe
GND terminal
Probe
Metal
pipe
GND terminal
Probe
Resin
pipe
Grounded metal pipeline
Ungrounded metal pipeline
Plastic or lined pipeline
Fig. 5.1
Internal ground terminal
Power terminal
block
Terminal board
Output signal
terminal block
Cable entries
