Step Fifteen
Step Fourteen
C. Wiring to a Typical Programmable Logic Controller
- +
+ -
DC Power
Supply
12-28 VDC
(+)
(-)
SHIELD
+ -
DC Power
Supply
12-28 VDC
TYpical PLC
6
5
4
3
2
1
0
A
(+)
(-)
Shield
WIRING
A. Wiring to a Omega LVCN-51 Controller
B. Wiring to a Typical Two-Wire Loop Powered Indicator
LATCH
ON OFF
P W R
R E L AY 1
INVERT
DELAY
R E L AY 2
INVERT
DELAY
4 20 OP
E A S Y CAL
UP
DOWN
SET
INPUT
0%
100%
OFF SET
SP
AN
RL
Y1
RL
Y2A
RL
Y2B
(+)
(-)
SHIELD
JWA mode
A. Fitting Selection:
Check the transmitter
part number to determine the required 2” fitting
thread type. The transmitter is commonly installed
in tank adapters, flanges, brackets or stand pipes.
1. Adapter:
Select a tank adapter fitting with
minimal height so as to ensure that the
installed transducer will not be substantially
elevated into the fitting. Avoid tank adapter
styles with threads and/or pipe stops forward
of the installed transducer.
2. Flange:
Tall flanges with narrow risers
impede the acoustic signal. Select a fitting
with the right riser height versus inner diame-
ter geometry. The transmitter may be elevat-
ed up to 12” (30 cm) in a 6” (15 cm) riser, 8”
(20 cm) in a 4” (10 cm) riser and 3” (7.6 cm)
in a 2” (5 cm) riser.
3. Bracket:
The LVM-30 bracket or equivalent
can be used for open tank top installations
against the side wall.
4. Stand Pipe:
A stand pipe may be
used to dampen turbulence or separate
surface foam. Select a minimum 3” pipe
for the stand pipe. The pipe length
should run the measurement span. Cut a
45° notch at the bottom of the pipe and
drill a 1/4” pressure equalization hole
high in the dead band.
VACUUM
Do not install at
angle relative
to the liquid
Do not install
within 3” of
tank side wall
Do not install
with objects
in the beam
Do not install
in applications
with vacuum
Dead Band
Ventilation
Hole
Operational Range
Highest
Liquid Level
Lowest
Liquid Level
3" Minimum
Diameter
Warning
Omega ultrasonic transmitters have been optimized for use in
non-metallic fittings. For best performance, avoid the use of
metal fittings.
Install the appropriate installation fitting. Make sure that the fit-
ting and transmitter threads are not damaged or worn. Install the
transmitter with the included Viton mounting gasket. Hand tight-
en the transmitter within the fitting. Perform an installed leak test
under normal process conditions prior to system start up.
Height
Inner Diameter
Adapter
Flange
Stand Pipe
Bracket
Gasket
Riser
INSTALLATION
