VEGA SON71 User Manual
VEGASON 71 - D
TIB • Technical Information • Operating Instructions
Pulse-echo
measuring system
1
2
1 2 3
5.000
4
VEGASON
m
Single channel flow
measurement
Approvals for hazardous
areas, certificate acc. to
CENELEC
VEGA Grieshaber KG
Am Hohenstein 113
D-77761 Schiltach
Phone 0 78 36 / 50 - 0
Fax 0 78 36 / 50 201
Contents
1 Introduction
1.1 Contents of the instruction manual .....................................................................................................................4
1.2 Safety information ...............................................................................................................................................4
1.3 Product description .............................................................................................................................................4
1.4 Approvals ............................................................................................................................................................4
2 Technical Information
2.1 Configuration of a measuring system .................................................................................................................5
2.2 Technical data, VEGASON 71 - D.......................................................................................................................6
2.3 Technical data, transducer ..................................................................................................................................7
2.3 Dimensional drawings ......................................................................................................................................... 8
2.4 Measuring range .................................................................................................................................................8
2.5 General installation instructions ..........................................................................................................................9
2.6 Installation fault .................................................................................................................................................10
2.7 Electrical connection ......................................................................................................................................... 11
Contents
3 Operating surface
3.1 Indicating and operating elements ....................................................................................................................12
3.2 Operation .......................................................................................................................................................... 13
4 Set-up
4.1 Flow chart for set-up ......................................................................................................................................... 14
4.2 Mode range, general parameter adjustment, mode 0 - 00 … 0 - 99 ................................................................. 15
5 Adjustment
5.1 Empty / full adjustment in metres without flow change ..................................................................................... 18
5.2 Demonstration and programming example .......................................................................................................18
6 Flow measurement
6.1 Linearization......................................................................................................................................................19
6.1.1 Meter flume / weir .................................................................................................................................. 19
6.1.2 Enquiry of linearization curves 4 … 6 ....................................................................................................20
6.2 Linearity protocol...............................................................................................................................................22
2
VEGASON 71 - D
Contents
7 Output results
7.1 Display ..............................................................................................................................................................23
7.1.1 Allocation of a multiplication factor.........................................................................................................23
7.1.2 Measuring unit .......................................................................................................................................23
7.1.3 Decimal point .........................................................................................................................................23
7.1.4 Integration time ......................................................................................................................................24
7.2 Adjustment max. flow ........................................................................................................................................24
7.3 Impulse value for flow relay ...............................................................................................................................24
7.4 Impulse value for sampling relay.......................................................................................................................24
7.5 Definition of the min. flow volume limit ..............................................................................................................25
7.6 Calculation examples of the max. flow ..............................................................................................................25
7.6.1 Khafagi-Venturi flume.............................................................................................................................26
7.6.2 Trapezoidal weir (Cipolletti) ....................................................................................................................27
7.6.3 Rectangular weir without throat .............................................................................................................28
7.6.4 Rectangular weir with throat ..................................................................................................................29
7.6.5 V-Notch .................................................................................................................................................. 30
7.6.6 Palmer-Bowlus-flume .............................................................................................................................31
7.7 Level module.....................................................................................................................................................32
7.7.1 Coordinations and their relations ...........................................................................................................32
7.7.2 Switching commands .............................................................................................................................32
7.8 Current module .................................................................................................................................................33
8 Supplementary programmings
8.1 Failure processing............................................................................................................................................. 33
8.2 Simulation .........................................................................................................................................................34
8.3 Basic adjustment, mode range general parameter adjustment.........................................................................34
8.4 Keyword ............................................................................................................................................................ 34
9 Optimization
9.1 Enquiry of the optimization................................................................................................................................35
9.2 Mode range optimization, mode 1 - 01 … 1 - 27...............................................................................................36
9.3 Definition of the operating range .......................................................................................................................37
9.4 Multiple echo reduction .....................................................................................................................................37
9.5 Adjustment of the max. gain .............................................................................................................................37
9.6 Fault signal........................................................................................................................................................ 38
9.8 Protocol of the optimization...............................................................................................................................38
9.7 Basic adjustment, mode range optimization .....................................................................................................38
10 Supplement
10.1 Error codes........................................................................................................................................................39
10.2 Error schedule...................................................................................................................................................39
VEGASON 71 - D
3
1 Introduction
1 Introduction
1.1 Contents of the instruction manual
The Technical Information / Operating Instructions is
called TIB. It contains all necessary information for correct
- installation
- connection
- set-up
- linearization
- optimization
of the pulse-echo-measuring system VEGASON 71 - D.
VEGA regularly revises the contents of TIBs as technical
improvements are made to the instruments.
1.2 Safety information
The described module must only be installed and operated
as described in this TIB. Please note that other action can
cause damage for which VEGA does not accept
responsiblity.
1.3 Product description
The pulse-echo measuring system VEGASON 71 - D is
used for flow and level measurement.
A measuring system consists of
- a central electronics and
- a sensor.
The sensor is provided with a temperature sensor for
compensation of the temperature influence to the sound
running period. Measuring data and temperature
information are transmitted along the same coaxial cable.
All adjustment procedures, optimizations etc. can be
directly programmed via a keyboard on the central
electronics.
1.4 Approvals
If a measuring system is mounted acc. to the following
approval, the respective legal document has to be used
and the regulations have to be strictly observed.
Approvals for hazardous areas, certificate acc. to
CENELEC.
Consisting of:
- central electronics VEGASON 71 - D
- sensor SW 71 R Ex
defined in the conformity certificate PTB-no.
Ex-94.C.4066.
The running periods of periodically emitted sound impulse
packets which are reflected by the flow product to be
measured are evaluated.
The running period of sound is a measure of the distance
between sensor and liquid surface.
The control electronics determines this distance and
converts it into flow information.
The measuring results are indicated on the integral LCdisplay and acc. to the version, provided as relay and
current outputs.
The conformity certificate is included with the product on
delivery.
4
VEGASON 71 - D
2 Technical Information
2 Technical Information
2.1 Configuration of a measuring system
Input Central electronics Outputs
Measuring data from the sensor 2 LC-display (multi-functional indication)
5.000
1
2
1 2 3
4
VEGASON
Flow module
- 1 relay output for flow
- 1 relay output for sampling
Level module
- 2 relay outputs
Current module
- 1 output flow proportional module
- 1 output level proportional module
Sensor
Central electronics consisting of:
- plastic housing with cover
- operating elements (5 keys)
- LED-display
- two LC-displays (multi-functional displays)
- power supply unit
- data memory (EEPROM, no buffer battery required)
- outputs: flow module, level module, current module
- terminals for power supply, inputs and outputs
VEGASON 71 - D
Sensor:
- in standard version or
- in Ex-version, certificate acc. to CENELEC
Accessories:
- swivelling holder for sensor mounting
Options:
- totalising counter (flow)
- indicator VEGADIS 171 A
- overvoltage arresters
5
2.2 T echnical data, VEGASON 71 - D
Power supply
Operating voltage
- Standard U
- Option U
Power consumption at U
Fuse for version
and max-load 12 V A, 5 W
nenn
16 … 42 V AC or 16 … 60 V DC 2 A
90 … 250 V AC 500 mA
Measuring range
Min. distance 0.300 m
Max. distance 4.000 m (5.000 m)
Measuring data
Min. span 10 cm
Display in m (0.000 … 5.000 distance)
Resolution in mm
Scanning 3 mm
Measuring frequency 50 kHz
Measuring rate 0,4 sec.
Angle of reflection (at –3 dB) 8°
Linearity error after empty and full adjustment < 0,1 % of measuring range
Temperature error of the electronics 0,1 % / 10 k of measuring range
= 24 V AC (16 … 42 V), 50/60 Hz
nenn
U
= 24 V DC (16 … 60 V)
nenn
= 230 V AC (90 … 250 V), 50/60 Hz
nenn
2 T echnical Information
Central electronics
Inputs 1 (1 channel, for 1 sensor)
Outputs see section "output"
Housing material Polycarbonate
Electrical connection max. 1,5 mm
2
Cable entry 1 x Pg 7, 1 x Pg 13,5 (up to max. 5 x Pg 13,5)
Protection IP 65
Ambient temperature -20°C … +60°C
Storage and transport temperature -20°C … +80°C
Weight approx. 1,9 kg
Output
Indication
LC-display 2, 4-digit each
Flow module
1 flow relay output active, with status indication (LED)
- voltage impulse 24 V
- current impulse 20 mA
- pulse duration 200 ms
1 sampling relay output floating spdt, with status indication (LED)
- contact material AgCdO and Au plated
- min. turn-on voltage 10 mV
switching current 10 µA
- max. turn-on voltage 250 V AC, 60 V DC
switching current 2 A AC, 1 A DC
- max. breaking capacity 125 V A, 60 W
6
VEGASON 71 - D
2 Technical Information
Level module
2 relay outputs floating spdts each
and 2 status indications (LEDs)
- contact material AgCdO and Au plated
- min. turn-on voltage 10 mV
switching current 10 µA
- max. turn-on voltage 250 V AC, 60 V DC
switching current 2 A AC, 1 A DC
- max. breaking capacity 125 V A, 60 W
Current module
2 current outputs
- range 0/4 … 20 mA
- resolution 0,05 % of range
- load max. 500 Ohm
- load dependent error at 0 … 500 Ohm, < 0,2 % related to the range
or module
as described above however with 2 floating outputs each
Fault signal
1 fail safe relay 1 floating spdt
contact data as described under relay outputs
2 failure-LEDs
2.3 Technical data, transducer
Transducer SW 71
Material of the transducer housing PVDF
Material of the fixing tube PVDF, thread G 1 A
Connection cable to central electronics standard coaxial cable type RG 58
Cable length 5 m, as option 300 m
Diameter of cable approx. 5 mm
Temperature sensor integrated in the transducer
Ambient temperature -20°C … +80°C
Storage and transport pressure -20°C … +80°C
Protection IP 68
Permissible ambient temperature 1 bar
Weight approx. 0,8 kg
Transducer SW 71 R Ex
Ex-approval PTB-no. Ex-94.C.4066
Flame proofing Casting "m"
Marking EEx m II T6 or T5 or T4
Material of the transducer housing PVDF
Material of the fixing tube PVDF, thread G 1 A
Connection cable to central electronics standard coaxial cable type RG 58
Cable length 5 m, as option up to 300 m
Diameter of cable approx. 5 mm
Temperature sensor integrated in the transducer
Temperature class T6 = 60°C, T5 = 75°C, T4 = 80°C
Storage and transport temperature -20°C … +80°C
Protection IP 68
Permissible ambient pressure 1 bar
Weight approx. 1,0 kg
VEGASON 71 - D
7
2.3 Dimensional drawings
(Dimensions in mm)
2 T echnical Information
Swivelling flange
28
138
Central electronics
Min. distance for
adjacent instrument
Flange
DN 150 PN 16
1
2
40
1 2 3
Pg 13,5 Pg 7
G 1 A
Sensor
*174
4
VEGASON
5
*229
* Mounting diemsnions
45
90
90
2.4 Measuring range
Reference plane
Min.-distance
Measuring range
ø95
Min.-distance
300 mm
0.000 m
0.300 m
max.
4.000 m (5.000 m)
8
VEGASON 71 - D
2 Technical Information
2.5 General installation instructions
Open flume with weir (e.g. rectangular)
- Installation of the transducer upstream
- Observe distance to the weir (3 … 4 x h
- Installation if possible centered to the flume
- Installation vertical to the surface of the flow product
- Observe min. distance relating to h
- Min. distance diaphragm opening to downstream water ≥ 5 cm
90°
weir
max
max
)
≥ Min.-
max
h
max
≥ 2 x h
distance
3 - 4 x h
max
90°
upstream water
≥ 5 cm
downstream
water
Open flume with measuring channel (e.g. Khafagi-Venturi flume)
- Installation of the sensor at the inlet
- Observe distance to the Khafagi-Venturi flume (3…4xh
- Installation if possible centered to the flume
- Installation vertically to the surface of the flow product
- Min. distance relating to the height of damping h
max
Note
Otherwise follow the installation guidelines given by the channel manufacturer.
Sensor
3 - 4 x h
max
90°
h
max
max
)
Sensor
VEGASON 71 - D
B
9
2.6 Installation fault
< 300 mm
max
h
2 T echnical Information
Fault: Min. distance from sensor to h
maintained.
max
not
Problem: The upper range cannot be measured.
Solution: Correct min. distance of the sensor to 0,3 m.
> 300 mm
max
h
Fault: Distance from sensor to h
Problem: Unreliable results due to very weak echoes.
too large.
max
Solution: Correct min. distance of the sensor to 0,3 m.
Fault: Sensor is not directed vertically to the surface.
Problem: Sensor receives weak echoes.
Solution: Mount sensor vertically.
Fault: Strong heat fluctuations, e.g. sun.
Problem: The measuring accuracy is not constant.
Solution: Install a sun shield in the respective position.
Fault: Sensor too close to the flume wall, i.e. not
mounted in the centre.
Problem: Build-up and rough flume walls cause
measuring problems.
Solution: Mount sensor in the centre of the flume.
10
Fault: Surface has foaming problem.
Problem: The surface of the foam is detected as level.
The measured value is wrong.
Solution: The used measuring principle is not suitable
and must be replaced e.g. by a hydrostatic
system (pressure transmitter).
VEGASON 71 - D
2 Technical Information
2.7 Electrical connection
Flow module
Flow module:
- Flow
Terminal 9 and 10
- Sampling
Terminal 12 … 14
91011
Relay output
-
+
Fuse type TR5
Manufacturer, e.g. Messrs. Wickmann,
Current value see 2.2 Technical Data
12
1 2
3
2
1
13 14
Service socket
4
5
Failure relay
output
Power supply
Level module
15 16
18
17
1 2
Relay output
Service switch
19
1
2
20
Attention!
High
voltage
Current module
+ - + -
23
21 22
1 2
Current output
6
24
7
8
standard coax cable
max. cable length = 300 mm
Current module:
- flow proportional
Terminal 21 and 22
- level proportional
Terminal 23 and 24
Note
During operation the sensor is clocked with highperformance impulses. It is therefore recommended to
provide all electrical connections first and then switch on
the power supply.
The connection line to the sensor can be extended as
shown. Therefore observe that a max. line length of 300 m
is not be exceeded.
Sensor
standard waterproof
distributor box
VEGASON 71 - D
11
3 Operating surface
3.1 Indicating and operating elements
Outer view Inner view
3 Operating surface
LED-indication
Fault signal
1
8888
2
1 2 3
LED-indication of the relay
output 1 … 4
4
Measuring units as label in
the provided window
Scheme of
operation
Indication of measured
values
MODEFIELD
1
8888
2
8888
PARAMETER FIELD
MOD
STO
Selection of
mode
Cursor position
figures raise
figures lower
Memory
Indication of measured values
e.g. flow 00.00 … 75.00 11.25 m3/h
Demonstration after respective programming of
- Measuring unit
- Allocation of a multiplication factor
- Decimal point e.g.
Flow 0 … 100 % 50.0 %
Level 0 … 100 % 50.00 %
Distance 0.000 … 5.000 m 5.000 m
12
Mode range
General parameter adjustment 0 - 00 … 99
Optimization 1 - 01 … 27
Linearization curve 4 4.H.01 … 32
Linearization curve 5 5.H.01 … 32
Linearization curve 6 6.H.01 … 32
Fault signals E2.01 … .04
VEGASON 71 - D
Loading...