Type 8160 Ultrasonic Level Transmitter

Type 8160 Ultrasonic Level Transmitter
Ultrasonic Level Transmitter
Type 8160
for continuous, non-contact level measurement
Level transmitter with PVDF transducer
Advantages / Benefits
Non-contact, continuous
measurement with 4-20 mA
and 10 amp relay output
Measurement range from
15 - 750 centimeters
All plastic construction
with PVDF transducer and
G 2 mounting threads
Digital display indicates
level in centimeter value
Easy-Cal™ push button
calibration for offset, span
and relay set points
Echo-Map™ signal return
logic profiles the tank to
disregard false echoes
Fail-safe relay logic
provides maximum process
safety in the event of both
power or signal loss
Signal invert, relay latch
and time delay
Application
Interface
Level Measurement
Outputs
Controller
Liquid or slurries in bulk storage,
day tank or process vessels.
The non-isolated, three-wire
4-20 mA output provides level
measurement.
Type 8620 continuous rail mount
controller
Enclosed Tank Environments
The gas reference tube and special
calibration mode will compensate for
the ongoing changes in gas density
found within enclosed tanks.
The 10 amp, SPDT relay may be
configured as an alarm or latched
for automatic fill or empty operation.
Fluid Control Systems
Back to Data Sheets
Ultrasonic Level Transmitter
Type 8160
Principle of Operation
An ultrasonic sound wave is pulsed
eight times per second from the
base of the transducer. As the
sound wave moves downward into
the vessel, it reflects against the
process material and returns to the
transducer. The microprocessor
based electronics then measures
the time between the signals
generation and receipt, and relates
this figure to the distance between
the transmitter and the process
material. Advanced signal processing
techniques, including temperature
compensation and Echo-Map™ tank
logic ensure the integrity of echo
signal returns. The ultrasonic level
transmitter is used for continuous,
Faceplate
non-contact measurement of liquids
and slurries.
Easy-Cal™
PLC
The transmitter faceplate features a digital display
with Easy-Cal™ push button calibration for offset,
span, relay, signal invert and time delay set points.
Span (20 mA)
Gas Reference Tube
Easy-Cal (20 mA)
Transmitter
Type 8160
7.5 meter
Valve Closed (R)
Valve Open (R)
Easy-Cal (4 mA)
Offset (4 mA)
The optional reference tube and special calibration
mode are used to compensate for ongoing changes
in gas density within enclosed tank environments.
Easy-Cal™ push button calibration provides a fast
and simple method to adjust the Echotouch™
measurement span and apply the relay set points.
Ultrasonic Level Transmitter
Type 8160
Derating Graphs
Unacceptable
Range
800
Sin
600
k
ing
400
200
4.5
90
4.0
3.5
80
Temperature ( °C )
1,200
1,000
Temperature / Voltage Derating
Temperature / Pressure Derating
Operating Pressure (bar)
Maximum Resistance (Ohm)
Electrical Loading Limits
Unacceptable
Range
3.0
2.5
2.0
1.5
1.0
Acceptable
Range
0.5
Continuous
20 mA
Sinking Current
70
60
50
40
Acceptable
Range
30
20
10
0
12
36
24
Supply Voltage (VDC)
-20 -10
0
12
10 20 30 40 50 60 70 80 90
Temperature ( °C )
Measurement Range
36
Beam Cone Radius
Signal Strength vs. Range Graph
Signal ( -dB )
16 20
24
28
32
Supply Voltage ( VDC )
Depth vs. Radius
0
Maximum Range Formula Example
-20
Optimal signal dB:
-40
90 dB
Derating factor dB:
(-)
40 dB
Maximum signal dB:
(=)
50 dB
50 dB = Maximum range of 3.4 meters
Depth (D)
Example
-60
-80
-90
-100
1
0
Range ( m )
2
3
4
5
6
7
7.5 8
Maximum Range Formula
Derating Factors
With an optimal signal return
strength of 90 decibels, the
ultrasonic transmitter has a
maximum measurement range of
7.5 meters. Although various
application factors can reduce the
overall signal return strength and
shorten the total range of the
transmitter. Such derating factors
include: (1) significant air to liquid
temperature differential; (2) beam
cone interference such as fill
streams, piping or mixers; and (3)
liquid surface tension. To estimate
the maximum range of the
transmitter in your application,
apply the maximum range formula
( 90 dB - the sum of the derating
factor dB = maximum signal dB ) to
the graph above. Refer to the
maximum range formula example.
Air / Liquid Temperature
dB
00 - 15 degrees C.....................0
16 - 43 degrees C................5-10
44 - 60 degrees C..............10-20
Radius (R)
(D)
Centimeter
(R)
(D)
25
50
75
100
125
150
175
200
225
250
275
300
325
350
375
4.2
6.4
8.6
10.8
13.0
15.1
17.3
17.5
21.7
23.9
26.1
28.2
30.4
32.6
34.8
(R)
Factor:
Beam Cone Interference
dB
Outside beam cone...................0
Edge of beam cone..............5-10
Inside beam cone...............10-20
Factor:
Liquid Surface Tension
dB
Calm surface.............................0
Agitated surface....................5-10
Wavy surface.....................10-20
Factor:
Total derating factor dB:
400
425
450
475
500
525
550
575
600
625
650
675
700
725
750
37.0
39.2
41.4
43.6
45.7
48.0
50.1
52.3
54.5
56.7
58.9
61.1
63.2
65.4
67.6
Ultrasonic Level Transmitter
Dimensions
7.5 meters
± 0.25% of full Span
± 3 mm
50 kHz
8 pulses per second
8 degrees conical
15 cm from transducer base
Display type:
Display units:
Supply voltage:
Current consumption:
Current flow:
Signal output:
Signal invert:
Offset adjustment:
Span adjustment:
Relay output:
Switch voltage:
Relay set point(s):
Relay time delay:
Four segment LED
Centimeters or inches
14-36 VDC
200 mA maximum
Sinking (Sourcing: optional)
4-20 mA, 12-36 VDC
4-20 mA or 20-4 mA
Easy-Cal™ push button (4 mA)
Easy-Cal™ push button (20 mA)
10 amp, SPDT (Form C)
240 VAC, 120 VDC (resistive)
Easy-Cal™ push button (relay)
Slow-2,5 minutes
Fast-30 seconds
LED for ON / OFF status
30 milliohms maximum
Relay automatically inverts to the
pre-determined NO / NC position
Relay indication:
Contact resistance:
Fail-safe diagnostics:
116 mm
85mm
71mm
120 mm
85 mm
Range:
Accuracy:
Resolution:
Frequency:
Pulse rate:
Full beam width:
Blocking distance:
205 mm
-20 to 60 oC.
Temperature range:
Temp. compensation: Automatic over entire range
2 bar at 25 oC.
Pressure rating:
Transducer material:
Enclosure material:
Enclosure rating:
Cable gland:
Mounting threads:
Gasket material:
G2 (Optional: NPT)
35 mm
Technical Data
Type 8160
PVDF
PP, flame retardent (U.L.94VO)
IP65 (NEMA 4X)
PG13 liquid tight gland
G2 (Optional: NPT)
Viton
Optional Gas
Reference Tube
56 mm
Ordering Chart for Ultrasonic Level Transmitter Type 8160
Description
Order-No.
Transmitter Type 8160
417 387 Q
with G2 mounting thread
Ordering Chart for Accesories
Description
Order-No.
Viton gasket
417 396 R
Reference tube
417 407 M
Side Mount Bracket
417 075 J
In case of special application requirements,
please consult for advice.
We reserve the right to make technical changes without notice. 710GB/ 2-0061
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement