Omega Products LVU-201 Installation Manual
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SPECIFICATIONS
Step One
Range:
Accuracy:
Resolution:
Frequency:
Pulse rate:
Beam width:
Deadband:
Blocking distance:
Display type:
Display units:
Memory:
Supply voltage:
Max loop resistance
Signal output:
Signal invert:
Calibration:
Fail-safe diagnostics:
Temperature rating:
Temp. compensation:
Pressure rating:
Enclosure rating:
Enclosure material:
Transducer material:
Mounting threads:
Conduit connection:
CE Compliance:
Temperature/Pressure Derating
-20 00 20 40 60
Temperature (“C)
z
Maximum
TemperatureNoltage
Continuous 20
16 20 24
Operating Voltage (VDC)
Electrical Loading Limits
0.5tol8feet(l5cmto5.4m)
* 0.25% of span in air
0.125” (3 mm)
kfIz
50
2
pulses per second
8” conical
0.5’ (15 cm) minimum
0.5 to 18 feet (15 cm to 5.4 m)
4 segment LCD
Inch (cm)
Non-volatile
12-36 VDC
@
900 Ohms
4-20
4-20
36 VDC (see below)
mA,
12-36 VDC (see below)
mA
/
20-4
mA
Push button
Reverts to 4
mA,
mA
or remains constant
22
F: -40” to 140”
C: -40” to 60” (see below)
Automatic over entire range
@
30 psi (2 bar)
(.
113 bar) per
25 “C., derated
“C.
above 25
NEMA 4X (IP65)
Polypropylene (PP), U.L. 94V0
Polyvinylidene Fluoride (PVDF)
2” NPT
l/2” NPT
EN 50082-2 immunity
EN 55011 emission
Derating
mA Curve
28 32 36
@
“C.
(see below)
1.667 psi
3.6”(Wmm)
n
.
4.9”(124mm)
6.3”(159mm)
I 1.3 ”
(32mm)
cl
cl
Technology
An ultrasonic sound wave is pulsed two times per second from
the base of the transducer. The sound wave reflects against the
process medium below and returns to the transducer. The
microprocessor based electronics measure the time of flight
between the sound generation and receipt, and translates this
figure into the distance between the transmitter and process
medium below.
LOST Signal:
A reading of LOST in the display of the
LVU-201
series indi-
cates the transmitter is not receiving a valid return signal. If
LOST appears, please check the following troubleshooting
items:
1.
Beam cone interference such as the side wall, ladders,
seams, rungs or pipes within the LVU-201 series beam cone.
2.
Proper installation such that the LVU-201 series is installed
from
level and free
interference from the installation fitting
or flange.
Sufficient power being supplied to the LVU-201 series. The
3.
transmitter requires 12-36 VDC power with a minimum sup-
ply of 25
4.
Proper programming of the MAXR or MINR function. For
mA.
best results, set the MAXR function as the distance from the
bottom of the tank to the bottom of the transmitter. Also set
the MTNR distance above the highest level in the tank.
MNR
u1wuy.r
optimum performance,
greatest setting.
5.
Make sure that the transmitter is not installed at an angle.
set the
value to
Even a 5 degree offset can reduce the signal return strength
greatly.
I
For
it:k
16 20 24
Supply Voltage
26 32 36
(WC)
A Warning
A
The LVU-201 series is a loop powered device. The load
should never exceed 900 Ohms.
When installing the LVU-201 series, never tighten the trans-
mitter from the body. Always use the wrench flat located
above the threads.
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