Installation - Gems Sensors & Controls UCL-520 Owner's Manual

INSTALLATION

Step Fourteen
Do not install at
angle relative
to the liquid
Do not install
with objects
in the beam
Gems ultrasonic transmitters have been optimized for use in
non-metallic fittings. 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
tighten the transmitter within the fitting. Perform an installed
leak test under normal process conditions prior to system start
up.
A. Fitting Selection:
Check the transmitter part number to deter-
mine the required 2" fitting thread type. The transmitter is commonly
installed in tank adapters, flanges, brackets or stand pipes.
Gasket 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.
Adapter
2. Flange: Tall flanges with narrow risers
impede the acoustic signal. Select a fitting
with the right riser height versus inner diam-
eter geometry. The transmitter may be elevat-
Flange
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. Stand Pipe: A stand pipe may be used to
Height
dampen turbulence or separate surface foam.
Inner Diameter
Select a minimum 3" pipe for the stand pipe.
Stand Pipe
Ventilation Dead Band
Hole
Highest
Liquid Level
3" Minimum
Diameter
Lowest
Liquid Level
Do not install
within 3" of
tank side wall
Do not install
in applications
with vacuum
VACUUM
Warning
The pipe length should run the measure-
ment span. Cut a 45° notch at the bot-
tom of the pipe and drill a 1/4" pressure
equalization hole high in the dead band.
WIRING
Step Fifteen
A. Wiring to a Typical Two-Wire Loop Powered Indicator
B. Wiring to a Typical PLC
(+) DC Power
Supply
SHIELD
12-28 VDC
(-)
+ - -
(+)
DC Power
Supply
Shield
12-28 VDC
(-)
+ -
+
6
5
4
3
2
1
0
A