Dwyer Instruments ProxiMity UL Series Installation And Operating Instructions

GENERAL

The Series UL Ultrasonic Level Transmitter provides
continuous, noncontact sensing for level control of liq-
uids or slurries. The sensor emits an ultrasonic pulse
which is reflected back to the sensor at the liquid/air
interface. The distance traveled by the pulse is calcu-
lated and converted to a 4 to 20 mA output signal.

MECHANICAL INSTALLATION

The sensor should be mounted on the top of the vessel
with the sensor facing down. The sensor face should be
parallel to the surface being measured. A clear path, free
of obstructions must be provided between the sensor
and the liquid surface. Obstructions in the beam path
will cause incorrect readings.
The ultrasonic wave spreads as it travels from the sen-
sor to the target material with the beam angle being 6.5
degrees from the center line. Typically the beam diame-
ter will increase three inches (3 ) for every foot (1 ) of
range. For example: An 18 deep tank will have a beam
diameter of 54 (3 18 ) in diameter at the bottom of
the tank.
A blind zone exists directly in front of the sensor. Liquid
levels cannot be detected in the blind zone. The UL100
has a blind zone of 12 , and the UL200 has a blind zone
of 18 . If it is necessary to measure to the top of the ves-
sel, the sensor may be raised above the tank with a pipe
or other means. The diameter of the pipe or extension
piece must be greater than 6 . Be sure not to mount the
sensor too close to the tank wall.
The Series UL include a 2 or 3 mounting flange. Sim-
ply bolt the sensor/flange assembly to the proper mat-
ing flange connection. The NEMA 4X control box can be
remotely mounted at a maximum distance of 100 feet
(30 m).
PROXIMITY Controls, A Division of Dwyer Instruments, Inc., Rte. 6, Box 386, Hwy 210 E, Fergus Falls, MN 56537/Phone 218 739-3364/219 879-1452/Fax 218 739-2734/219 872-9057
Series Ultrasonic Level Transmitter
UL
Specifications – Installation and Operating Instructions
Ø2.875
Ø7.500
Ø7.500

SPECIFICATIONS

Accuracy: 0.3% of span.
Repeatability: 0.125 (+3 mm) typical.
Supply Voltage: 115 10% VAC, 5-/60 Hz, 5 VA.
Output: 4 to 20 mA into 600 isolated.
Blind Zone: (UL100) 12 (5 cm), (UL200) 18 (7 cm).
Beam Angle: Conicle 12°.
Sensor Pressure Rating: 150 psig maximum.
Temperature Compensation: –20 to 180°F (–30 to 82°C).
Temperature Range: Sensor: –20 to 180°F (–30 to 82°C),
Electronics: –10 to 160°F (–23 to 71°C).
Sensor Material: CPVC.
Control Box Enclosure: Polycarbonate, NEMA 4X.
Mounting: (UL100) 2 PVC 150# flange, (UL200) 3 PVC 150#
flange.

ELECTRICAL INSTALLATION

When routing wires, the AC power must be kept sepa-
rate from the analog output. Do not run the analog out-
put in the same conduit with any AC power or near any
AC wiring or AC conduit. If using several UL transmit-
ters, do not run the sensor cables together. The sensor
cables must be run in separate conduit or interference
may result.
Use 18 AWG shielded two conductor cable for the out-
put signal. Use 16 AWG two conductor cable for the
power and ground. Connect the sensor cable as shown
in figure 1, with the red wire connected to the "TC" ter-
minal, the center of the cable connected to the "CENT"
terminal, and the shield of the cable to the "SHIE" ter-
minal.
NOTE: Do not use the Series UL Ultrasonic Level
Transmitter in applications where foam, agitation or
heavy vapor are present.
Bulletin E-81-UL
7.000
3.000
FLANGE
DIV OF DWYER
102 HWY 212 MICHIGAN CITY, IN. 46060, U.S.A.
10.000
73