Two of the sensor wires are for the main vibrating-wire measurement, and they are wired
internally to the coil-circuit of the sensor. This connection is used for both sensor excitation
(energy input) and for reading out the current measurement (measurement output). Use the VW
terminals as shown in the following figure.
Figure
7-1.
CRVW3
wiring
panel
Sensor
manufacturers
often
colo
u
r-code
wires
so
you
can
easily
identify
which
wires
are
for
the
coil-circuit
and
which
are
for
the
temperature
device.
Polarity
is
not
a
consideration
for
wiring
to
the
two
VW
terminals
or
the
two
T
terminals.
The
following
table
and
figure
show
typical
sensor
wire
colo
u
rs
and
connections.
Table
7-1:
Sensor
wire
colo
ur
,
function,
and
CRVW3
connection
Label
Description
Common
colo
u
r
schemes
VW
First vibrating wire
Red
Orange
VW
Second vibrating wire
Black
Orange/White
⏚
Ground
Shield
Shield
T
First thermistor
Green
Blue
T
Second thermistor
White
Blue/White
Figure
7-2.
Typical
vibrating-wire
sensor
wire
colo
u
rs
and
connections
Ensure
that
there
is
good
contact
between
the
wire
metal
and
the
inside
of
the
terminal.
CRVW3 3-Channel Vibrating-Wire Data Logger
18
