Page 1
VA 520 English V1.13 Page 1 of 32
EN – English
Instruction manual
Consumption counter VA 520
with Display, 4 ... 20 mA and pulse output (galv. isolated)
Stationary
Flow and consumption measurement for compressed air and gases
Page 2
Foreword
VA 520 EN V1.13 page 2 o 32
I. Foreword
Dear customer,
thank you very much for deciding in favour of the VA 520. Please read this
installation and operation manual carefully before mounting and initiating the device
and follow our advice. A riskless operation and a correct functioning of the
VA 520 are only guaranteed in case of careful observation of the described
instructions and notes
Sales Office South / Geschäftsstelle Süd
Zindelsteiner Str. 15
D-78052 VS-Tannheim
Tel.: +49 (0) 7705 978 99 0
Fax: +49 (0) 7705 978 99 20
Mail: info@cs-instruments.com
Web: http://www.cs-instruments.com
Sales Office North / Geschäftsstelle Nord
Am Oxer 28c
D-24955 Harrislee
Tel.: +49 (0) 461 700 20 25
Fax: +49 (0) 461 700 20 26
Mail: info@cs-instruments.com
Web: http://www.cs-instruments.com
Page 3
Table of Content
VA 520 English V1.13 Page 3 of 32
II. Table of Contents
I. Foreword .......................................................................................................................... 2
II. Table of Contents ......................................................................................................... 3
1 Safety instructions .......................................................................................................... 5
2 Instruments description .................................................................................................. 6
3 Technical data .................................................................................................................. 7
4 Installation Description ................................................................................................... 8
4.1 Pipe/tube requirements ......................................................................................................... 8
4.2 Inlet / outlet runs .................................................................................................................... 8
4.2.1 Installation of VA 520 ........................................................................................................ 9
4.3 Displayhead Position ............................................................................................................. 9
5 Flow measuring ranges ................................................................................................. 10
5.1 Flow air .................................................................................................................................. 10
5.2 Flow for different gases ....................................................................................................... 10
6 Dimensions .................................................................................................................... 11
6.1 With measurement section and screw-in thread .............................................................. 11
6.2 With measurement section and flange (Material stainless steel 1.4404): ...................... 12
7 Electrical wiring ............................................................................................................. 13
7.1 Electrical wiring .................................................................................................................... 13
Page 4
Table of Content
VA 520 EN V1.13 page 4 o 32
8 Operation ........................................................................................................................ 14
8.1 Initialization .......................................................................................................................... 15
8.2 Main menu ............................................................................................................................ 15
8.3 Settings ................................................................................................................................. 16
8.3.1 Sensor Setup ................................................................................................................... 16
8.3.1.1 Input / change tube diameter .................................................................................... 16
8.3.1.2 Input / change consumption counter ........................................................................ 17
8.3.1.3 Definition of the units for flow, velocity, temperature and pressure .......................... 17
8.3.1.4 Definition of the reference conditions ....................................................................... 18
8.3.1.5 Setting of Zeropoint and Low-flow cut off ................................................................. 20
8.3.2 Modbus Setup .................................................................................................................. 21
8.3.2.1 Modbus Settings (2001…2005) ............................................................................. 22
8.3.2.2 Values Register (1001 …1500) ................................................................................ 22
8.3.3 Pulse /Alarm ..................................................................................................................... 24
8.3.3.1 Pulse output .............................................................................................................. 24
8.3.4 User Setup ....................................................................................................................... 25
8.3.4.1 Password .................................................................................................................. 25
8.3.4.2 Language .................................................................................................................. 25
8.3.4.3 Display / Touch ......................................................................................................... 26
8.3.5 Advanced ......................................................................................................................... 26
8.3.6 4 -20mA ........................................................................................................................... 27
8.3.7 VA 520 Info ...................................................................................................................... 29
8.4 MBus ...................................................................................................................................... 30
8.4.1 Default Settings communication ...................................................................................... 30
8.4.2 Default values transmitted ............................................................................................... 30
9 Maintenance ................................................................................................................... 31
10 Cleaning of the sensor head ..................................................................................... 31
11 Re-Calibration ............................................................................................................. 31
12 Spare parts and repair ............................................................................................... 31
13 Calibration ................................................................................................................... 31
14 Warranty ...................................................................................................................... 31
Page 5
Safety instructions
VA 520 English V1.13 Page 5 of 32
1 Safety instructions
Please read carefully before starting the device!
Warning: Do not exceed the pressure range of 16 bar!
Observe the measuring range of the sensor!
Always observe the direction of flow when positioning the sensor!
The screwed fixture must be pressure tight.
It is absolutely necessary to avoid condensation on the sensor element or water drops in the
measuring air as they may cause faulty measuring results.
The manufacturer cannot be held liable for any damage which occurs as a result of non-
observance or non-compliance with these instructions. Should the device be tampered with
in any manner other than a procedure which is described and specified in the manual, the
warranty is cancelled and the manufacturer is exempt from liability.
The device is destined exclusively for the described application.
We offer no guarantee for the suitability for any other purpose and are not liable for errors
which may have slipped into this operation manual. We are also not liable for consequential
damage resulting from the delivery, capability or use of this device.
We offer you to take back the instruments of the instruments family VA 520 which you would
like to dispose of.
Qualified employees from the measurement and control technology branch should only carry
out adjustments and calibrations.
The consumption sensor VA 520 works according to the calorimetric measuring procedure.
Flammable gases
If this consumption sensor is used for measurement of flammable gases (e. g. natural gas
and so on) we expressly would like to point out that the sensor has no DVGW admission,
however, it can be used for measurements in natural gas. A DVGW admission is not
mandatory.
The consumption sensor corresponds with the current state of technology and basically it can be used
in any flammable and non-flammable gases.
If the sensor is used e.g. in the medium natural gas, the sensor will be adjusted for natural
gas. The calibration protocol (inspection certificate) will be included in the scope of delivery.
The area outside the pipeline (ambient area of the sensor) must not be an explosive area.
The installation has to be carried out by authorized professionals.
Page 6
Instruments decription
VA 520 English V1.13 Page 6 of 32
2 Instruments description
The VA 520 is a compact consumption counter for compressed air and gases.
Special features:
- Optimum accuracy due to compact design
- Intgrated Display showing Flow, consuption, velocity and temperature
- Input inner tube diameter via display keys
- Setting the gas type via display keys
- Units free selectable. m³/h, m³/min, l/min, l/s, kg/h, kg/min, kg/s, cfm
- Modbus RTU (RS485) Interface
- Analogoutput 4..20mA
- Pulse output galv. isolated.
CS Instruments Service Software
- Analogue output 4...20 mA scalable
- Selection of gas type (Air, Nitrogen, Argon, Nitrous oxide, CO2, Oxygen, Natural gas)
- Read out Service data
- Sensor diagnoses
Page 7
Technical data
VA 520 English V1.13 Page 7 of 32
3 Technical data
Measurement: Flow and consumption
Standard settings ex works:
DIN 1945, ISO 1217 at 20°C and 1000 mbar
Selectable Units m³/h (Standard settings ex works)
m³/min, l/min, l/s, ft/min, cfm, m/s, kg/h, kg/min, kg/s
Measuring principle: calorimetric measurement
Sensor: Pt45, Pt1000
Measuring medium: Air, gases
Operating temperature: -30 ... 100°C probe tube
-20 ... 70°C housing
Operating pressure: up to 16 bar, special version PN 40 (40 bar)
Power supply: 18 to 36 VDC
Power consumption: max. 5W
Digital output: RS 485 (Modbus RTU)
Analog output: 4...20 mA (see table below), max. burden < 500 Ohm
Description
Analogue output
VA 520 with integrated 1/4" meas. section
4… 20 mA =
0...90 l/min
VA 520 with integrated 1/2" meas. section
4… 20 mA =
0...90 m³/h
VA 520 with integrated 3/4" meas. section
4… 20 mA =
0...170 m³/h
VA 520 with integrated 1" meas. section
4… 20 mA =
0...290 m³/h
VA 520 with integrated 1 1/4" meas. section
4… 20 mA =
0...530 m³/h
VA 520 with integrated 1 1/2" meas. section
4… 20 mA =
0...730 m³/h
VA 520 with integrated 2" meas. section
4… 20 mA =
0…1195m³/h
VA 520 with integrated 2 1/2" meas. section
4… 20 mA =
0…2050m³/h
VA 520 with integrated 3" meas. section
4… 20 mA =
0…2840m³/h
Pulse output: pulse output potential free (dry contact)
passive: max. 48Vdc, 150mA
1 pulse pro m³ resp. pro l,
Valency adjustable with the display keys
Accuracy: ± 1,5 % m.v., ± 0,3 % f. s.*
Display: TFT 1.8 Resolution 220 x 176
Mounting thread: R 1/4", R1/2", R3/4", R1", R 1 1/4" R1 1/2", R 2” DIN EN
10226 (ISO 7-1)
Material: Stainless steel 1.4301 / 1.4404
Version with flange DIN EN 1092-1: Stainless steel 1.4404
* m.v. = measured values
f.s. = full scale
Page 8
Installation
VA 520 EN V1.13 page 8 o 32
4 Installation Description
4.1 Pipe/tube requirements
Correctly sized gaskets
Correct aligned flanges and gaskets
Diameter mismatch at the pipe junctions should be avoided but must be less than 1mm. For
further information see ISO 14511
Ensure clean pipes after installation
4.2 Inlet / outlet runs
The principle of thermal Mass flow measurement is very sensitive against disturbances. Therefore, it is
necessary to ensure the recommended inlet and outlet runs.
Table of additionally required inlet sections
Flow obstruction in front of the
measuring section
Minimum length inlet
section (L1)
Minimum length
outlet section (L2)
Slight curve
(bend < 90°)
12 x D
5 x D
Reduction
(pipe narrows towards the meas. section)
15 x D
5 x D
Expansion
(pipe expands towards the meas. section)
15 x D
5 x D
90° bend
or T-piece
15 x D
5 x D
2 bends á 90°
on one level
20 x D
5 x D
2 bends á 90°
3-dimensional change of direction
35 x D
5 x D
Shut-off valve
45 x D
5 x D
15 x D 5 x D
15 x D 5 x D15 x D
15 x D 5 x D
20 x D 5 x D
35 x D 5 x D
5 x D45 x D
The respective minimum values required are indicated here. If it is not possible to observe the
stipulated equalising sections, considerable deviations in the measuring results must be expected.
Page 9
Installation
VA 520 EN V1.13 page 9 o 32
Attention:
The measuring sections of VA 520 consumption counters with 1 1/2" and 2" measuring section
have reduced inlet and outlet sections. Please take into consideration the recommended inlet and
outlet sections. Dimension please see page 11 and 12.
4.2.1 Installation of VA 520
The sensor VA 520 is pre-supplied with the measuring section.
An installation at customer site is only allowed in the unpressurized state of the
system
The connecting nut is tightened to a torque of 25 -30 Nm.
Tightness of the connection must be checked and ensured.
4.3 Displayhead Position
Fastening screws
The Position of the Displayhead is twistable by 180 e.g. in
case of reverse flow direction.
For this purpose the 6 fastening screws are to be released
and the displayhead rotated 180°.
Caution:
It must be ensured that the connection plugs are still plugged
and the gasket is installed correctly.
Page 10
Measuring ranges
VA 520 English V1.13 Page 10 of 32
5 Flow measuring ranges
5.1 Flow air
Pipe size
Inner pipe
Ø
Pipe size
VA 520
Consumption
Inch
mm Meas. ranges from … to
Standard setting
1/4“
8,5
DN 8
0,8…90 l/min
l
1/2“
16,1
DN 15
0,2…90 m³/h
m³
3/4“
21,7
DN 20
0,3...170 m³/h
m³
1“
27,3
DN 25
0,5...290 m³/h
m³
1¼“
36,0
DN 32
0,7…530m³/h
m³
1 ½"
41,9
DN 40
1,0…730 m³/h
m³
2“
53,1
DN 50
2,0...1195 m³/h
m³
2 ½"
68,9
DN 65
4,0…2050 m³/h
m³
3“
80,9
DN 80
7,0…2840 m³/h
m³
Reference DIN 1945/ ISO 1217: 1000mbar /20°C; Air
5.2 Flow for different gases
1/4"
1/2"
3/4"
1"
1 ¼"
1 ½"
2"
2 ½"
3"
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
l/min
[m³/h]
[m³/h]
[m³/h]
[m³/h]
[m³/h]
[m³/h]
[m³/h]
[m³/h]
Reference DIN1945/ ISO 1217: 20°C, 1000 mbar (Reference during calibration)
Air
90
90
170
290
530
730
1195
2050
2840
Adjustment to DIN 1343: 0°C, 1013,25 mbar
Air
80
82,76
156,33
266,68
487,38
671,29
1098,91
1885,16
2676,01
Argon
Ar
140
140
275
460
830
1140
1870
3205
4440
Carbon dioxide
CO2
85
90
175
290
525
720
1185
2030
2810
Nitrogen
N2
80
80
155
260
485
650
1060
1820
2610
Oxygen
O2
85
85
165
280
505
695
1140
1955
2710
Nitrous oxide
N2O
85
85
170
285
520
715
1170
2010
2785
Natural gas
NG
50
50
105
170
310
430
705
1210
1680
Other gases on request
Please note:
The consumption sensor corresponds with the current state of technology and basically it can be used
in any flammable and non-flammable gases.
If this consumption sensor is used for measurement of flammable gases (e.g. natural gas and so on)
we expressly would like to point out that the sensor has no DVGW admission, however, it can be used
for measurements in natural gas. A DVGW admission is not mandatory.
The area outside the pipeline (ambient area of the sensor) must not be an explosive area.
Page 11
Dimensions
VA 520 English V1.13 Page 11 of 32
6 Dimensions
6.1 With measurement section and screw-in thread
A
A
L1
L
ØAD
ØID
H1
H
76,5 75,0
Pipe size
AD / ID
(mm)
L
(mm)
L1
(mm)
H
(mm)
H1
(mm)
R
A
(mm)
VA 520 1/4"
DN 8
13,7 / 8,5
194
137
176,6
166,3
R 1/4"
15
VA 520 1/2“
DN 15
21,3 / 16,1
300
210
177,0
166,3
R 1/2“
20
VA 520 3/4“
DN 20
26,9 / 21,7
475
275
179,8
166,3
R 3/4“
20
VA 520 1“
DN 25
33,7 / 27,3
475
275
183,2
166,3
R 1“
25
VA 520 1 1/4"
DN 32
42,4 / 36,0
475
275
187,5
166,3
R 1 1/4"
25
VA 520 1 1/2“
DN 40
48,3 / 41,9
475
275
190,5
166,3
R 1 1/2“
25
VA 520 2“
DN 50
60,3 / 53,1
475
275
196,5
166,3
R 2“
30
Order no.
stainless
steel
1.4404
Order no.
stainless
steel
1.4301
Description
Analogue output
0695 1520
0695 0520
VA 520 with integrated 1/4" meas. section
4… 20 mA =
0...90 l/min
0695 1521
0695 0521
VA 520 with integrated 1/2" meas. section
4… 20 mA =
0...90 m³/h
0695 1522
0695 0522
VA 520 with integrated 3/4" meas. section
4… 20 mA =
0...170 m³/h
0695 1523
0695 0523
VA 520 with integrated 1" meas. section
4… 20 mA =
0...290 m³/h
0695 1526
0695 0526
VA 520 with integrated 1 1/4" meas. section
4… 20 mA =
0...530 m³/h
0695 1524
0695 0524
VA 520 with integrated 1 1/2" meas. section
4… 20 mA =
0...730 m³/h
0695 1525
0695 0525
VA 520 with integrated 2" meas. section
4… 20 mA =
0…1195m³/h
Page 12
Dimensions
VA 520 EN V1.13 page 12 o 32
6.2 With measurement section and flange (Material stainless steel 1.4404):
Flange DIN EN 1092-1
Pipe size
AD/ID
(mm)
L
(mm)
L1
(mm)
H
(mm)
H1
(mm)
Ø D
in mm
Ø K
in mm
nxØL
in mm
VA 520 1/2“
DN 15
21,3 / 16,1
300
210
213,8
166,3
95
65
4 x 14
VA 520 3/4“
DN 20
26,9 / 21,7
475
275
218,8
166,3
105
75
4 x 14
VA 520 1“
DN 25
33,7 / 27,3
475
275
223,8
166,3
115
85
4 x 14
VA 520 1 1/4"
DN 32
42,4 / 36,0
475
275
263,3
166,3
140
100
4 x 18
VA 520 1 1/2“
DN 40
48,3 / 41,9
475
275
2 40,7
166,3
150
110
4 x 18
VA 520 2“
DN 50
60,3 / 53,1
475
275
248,2
166,3
165
125
4 x 18
VA 520 2 1/2“
DN 65
76,1 / 68,9
475
275
268,2
175,7
185
145
8 x 18
VA 520 3“
DN 80
88,9 / 80,9
475
275
275,7
175,7
200
160
8 x 18
Order-No.
Description
Analogue output
0695 2521
VA 520 with integrated 1/2" meas. section with weld neck flange
4… 20 mA =
0...90 m³/h
0695 2522
VA 520 with integrated 3/4" meas. section with weld neck flange
4… 20 mA =
0...170 m³/h
0695 2523
VA 520 with integrated 1" meas. section with weld neck flange
4… 20 mA =
0...290 m³/h
0695 2526
VA 520 with integrated 1 1/4" meas. section with weld neck flange
4… 20 mA =
0...530 m³/h
0695 2524
VA 520 with integrated 1 1/2" meas. section with weld neck flange
4… 20 mA =
0...730 m³/h
0695 2525
VA 520 with integrated 2" meas. section with weld neck flange
4… 20 mA =
0…1195m³/h
0695 2527
VA 520 with integrated 2 1/2" meas. section with weld neck flange
4… 20 mA =
0…2050m³/h
0695 2528
VA 520 with integrated 3" meas. section with weld neck flange
4… 20 mA =
0…2840m³/h
Page 13
Electrical wiring
VA 520 English V1.13 Page 13 of 32
7 Electrical wiring
7.1 Electrical wiring
Attention: Not required connections NC must not be connected to a voltage and/or to protection
earth. Cut and insulate cables.
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Connector plug A
+VB
RS 485 (A)
-VB
RS 485 (B)
I+
4..20 mA
Connector plug B
Pulse output (standard)
NC
GND
DIR
Pulse
galv. isolated
Pulse gavl.
isolated
Connector plug B
Option MBus
NC
NC
NC
MBus
MBus
Colours pulse cables
0553 0106 (5 m)
0553.0107 (10 m)
brown
white
blue
black
grey
Legend:
-VB
Negative supply voltage 0 V
Pulse
Pulse for consumption
+VB
Positive supply voltage 18...36 VDC smoothed
NC
Must not be connected to a voltage
and/or to protection earth. Please cut
and isolate cables.
I +
Current signal 4...20 mA – selected measured
signal
RS 485 (A)
RS 485 (B)
Modbus RTU A
Modbus RTU A
MBus
MBus (reverse polarity protected)
If no connection cable/ pulse
cable is ordered the sensor will
be supplied with a M12
connector plug. The user can
connect the supply and signal
cables as indicated in the
connection diagram.
.
M12 Connector plug
View from back side
(terminal side)
Connector plug A (M12 - A-coding) Connector plug B (M12 - A-coding)
3
4
5
1
2
+ VB
- VB
4 … 20mA
+ -
Grau / Grey
Blau / Blue
Weiss / White
Schwarz / Black
Modbus (B)
Modbus (A)
Braun / Brown
3
4
5
1
2
Grau / Grey
Schwarz / Black
Impulsausgang / Pulse output
Remark: If the sensor is placed at the end of the Modbus system a termination is required. The sensors have an
internal switchable termination, therefore the 6 fastening screws from the lid are to be released and set
the internal DIP Switch to “On”. It must be ensured that the connection plugs are still plugged and the
gasket is installed correctly, see also chapter 4.1.
Alternatively, a 120R resistor can be installed in the plug between pin 2 and pin 4.
- Connector plug
- Connector plug B
Page 14
Operation
VA 520 English V1.13 Page 14 of 32
8 Operation
Remark: Only for version with display
“Up“ ( ) “OK“ ( )
The operation of the VA 520 is done by the two capacitive key buttons Up () and Enter ()
Page 15
Operation
VA 520 EN V1.13 page 15 o 32
8.1 Initialization
8.2 Main menu
Switching to pages 2-4 or back by pressing key „ “
AV-Time ( Period for average value calculation) could be changed under Sensor Setup.-Advanced– AV-Time
HW Version
Page-No.
*** VA 520 ***
Gas /
Status Info
SW Version
Modbus ID
*** VA 520 ***
391.23
391
1 minutes
410,34
1 minute
91,3282.46
After switching on the VA 520, the initialized
screen is displayed followed by the main
menu.
Page 16
Operation
VA 520 EN V1.13 page 16 o 32
8.3 Settings
The settings menu could accessed by pressing the key „OK“.
But the access to the settings menu is password protected.
8.3.1 Sensor Setup
Setup Sensor Setup
8.3.1.1 Input / change tube diameter
For VA 520 not adjustable (suspended) as voted on included measuring section with corresponding pipe
diameter.
53.1 mm
For changes, first select the menu item
with key „ “ and then confirm it with
“OK“.
Selection of a menu item or to change a value
is done with the key „ “, a final move to the
chosen menu item or takeover of the value
change needs the confirmation by pressing the
key „OK“
Factory settings for password at the time of
delivery: 0000 (4 times zero).
If required the password could be changed at
Setup–User setup-Password.
.
Page 17
Operation
VA 520 EN V1.13 page 17 o 32
8.3.1.2 Input / change consumption counter
Setup Sensor Setup Total Counter Unit button
Important!
When the counter reach 100000000 m³ the counter will be reset to zero.
8.3.1.3 Definition of the units for flow, velocity, temperature and pressure
Setup Sensor Setup Units
In order to change, e.g. the unit, first select by
pressing key „ “ the button “Unit” and then
key “OK”.
Select with the key „ “ the correct unit and
then confirm selection by pressing 2x „OK“.
Entering / changing the consumption counter
via button „“ , select the respective position
and activate the position with the "OK"
button.
By pressing „“ the position value is
incremented by 1. Complete with "OK" and
activate next number position.
Confirm entry by pressing „OK“.
To make changes to the unit for the respective
measurement value, first select by pressing
„“ the field of the „measurement value“ and
activate „it with „OK“ .
Selection of the new unit with „“
In case the quantity of units selectable are not
presentable on one page, pleas move to next
page by pressing „<<“ .
Confirm selection by pressing 2x „OK“.
Procedure for all 4 measurement variables is
analogous.
Page 18
Operation
VA 520 EN V1.13 page 18 o 32
8.3.1.4 Definition of the reference conditions
Here can be defined the desired measured media reference conditions for pressure and temperature
and times for the filter and averaging.
Factory presetting for reference temperature and reference pressure are 20 °C, 1000 hPa
All volume flow values (m³/h) and consumption values indicated in the display are
related to 20 °C and 1000 hPa (according to ISO 1217 intake condition)
Alternatively 0 °C and 1013 hPa (=standard cubic meter) can also be entered as a reference.
Do not enter the operation pressure or the operation temperature under reference conditions!
Setup Sensor Setup Advanced
Setup Sensor Setup Advanced Ref.Pref
Setup Sensor Setup Advanced
Ref.Temp
To make changes, first select a menu with
button „“ and confirm selection by pressing
„OK“ .
In order to change, e.g. the unit, first select by
pressing key „ “ the field “Units” and then
key “OK”.
Select with the key „ “ the correct unit and
then confirm selection by pressing 2x „OK“.
Input / change of the value by selecting the
respective position with button „“and
entering by pressing button „OK“ .
By pressing „“ the position value is
incremented by 1. Complete with "OK" and
activate next number position.
Procedure for changing the reference
temperature is the same.
Page 19
Operation
VA 520 EN V1.13 page 19 o 32
Setup Sensor Setup Advanced Filtertime
Setup Sensor Setup Advanced AV-Time
Under item "Filtertime" " an attenuation can
be defined.
Input values of 0 -10000 in [ms] are possible
The time period for averaging can be entered
here.
Input values of -1440 1 [minutes] are possible.
For average values see display window 3 + 4
Page 20
Operation
VA 520 EN V1.13 page 20 o 32
8.3.1.5 Setting of Zeropoint and Low-flow cut off
Setup Sensor Setup ZP Adjust
1, 03
Setup Sensor Setup ZP Adjust ZeroPnt
Setup Sensor Setup ZP Adjust CutOff
Setup Sensor Setup ZP Adjust t Reset
1,03
To make changes, first select a menu with
button „“ and confirm selection by pressing
„OK“ .
When, without flow, the installed sensor shows
already a flow value of > 0 m³/h herewith the
zero point of the characteristic could be reset.
For an input / change of the value select with
the button „“ the respective number position
and activate it with „OK“.
By pressing „“ the position value is
incremented by 1. Confirm the input with „OK“
and activate next number position.
Leave menu with button „Back“
With the low-flow cut off activated, the flow
below the defined "LowFlow Cut off" value will
be displayed as 0 m³/h and not added to the
consumption counter.
For an input / change of the value select with
the button „“ the respective number position
and activate it with „OK“.
By pressing „“ the position value is
incremented by 1. Confirm the input with „OK“
and activate next number position.
Leave menu with button „Back“
By selection of „Reset“ all settings for
„ZeroPnt“ and. „CutOff“ are reset.
Menu item to be select with button „“ and
confirm the reset with „OK“ .
Leave menu with button „Back“
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Operation
VA 520 EN V1.13 page 21 o 32
8.3.2 Modbus Setup
The Flow sensors VA 520 comes with a Modbus RTU Interface.
Before commissioning the sensor the communication parameters
Modbus ID, Baudrate, Parity und Stop bit
must be set in order to ensure the communication with the Modbus master.
Settings Modbus Setup
Default values out of factory: Modbus ID: 1
Baud rate: 19200
Stopbit: 1
Parity: even
Byte Order: ABCD
Remark: If the sensor is placed at the end of the Modbus system a termination is required. The sensors have an
internal switchable termination, therefore the 6 fastening screws from the lid are to be released and set
the internal DIP Switch to “On”.
Alternatively, a 120R resistor can be installed in the plug between pin 2 and pin 4.
It must be ensured that the connection plugs are still plugged and the gasket is installed correctly
For changes, e.g. the sensor ID,
first select by pressing key „“ the field
“ID” and then key “OK”.
Select the desired position by pressing the
">" and select with "OK" button.
Change values by pressing the „“ values
takeover by pressing "OK".
Inputs for baudrate, stopbit and parity is
done analogue.
By means of the button "Byte Order" it is
possible to change the data format (Word
Order). Possible formats are "ABCD" (Little
Endian) and "CDAB" (Middle Endian)
Saving the changes by pressing "Save",
therefore select it with key „“ and then
confirm it with "OK".
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Operation
VA 520 EN V1.13 page 22 o 32
8.3.2.1 Modbus Settings (2001…2005)
Modbus
Register
Register
Address
No.of
Byte
Data
Type
Description
Default
Setting
Read
Write
Unit /Comment
2001
2000 2 UInt16
Modbus ID
1
R/W
Modbus ID 1…247
2002
2001 2 UInt16
Baudrate
4
R/W
0 = 1200
1 = 2400
2 = 4800
3 = 9600
4 = 19200
5 = 38400
2003
2002 2 UInt16
Parity 1 R/W
0 = none
1 = even
2 = odd
2004
2003 2 UInt16
Number of Stopbits
R/W
0 = 1 Stop Bit
1 = 2 Stop Bit
2005
2004 2 UInt16
Word Order
0xABCD
R/W
0xABCD = Big Endian
0xCDAB = Middle Endian
8.3.2.2 Values Register (1001 …1500)
Modbus
Register
Register
Address
No.of
Byte
Data Type
Description
Def
ault
Read
Write
Unit /Comment
1101
1100
4
Float
Flow in m³/h
R
1109
1108
4
Float
Flow in Nm³/h
R
1117
1116
4
Float
Flow in m³/min
R
1125
1124
4
Float
Flow in Nm³/min
R
1133
1132
4
Float
Flow in ltr/h
R
1141
1140 4 Float
Flow in Nltr/h
R
1149
1148 4 Float
Flow in ltr/min
R
1157
1156 4 Float
Flow in Nltr/min
R
1165
1164 4 Float
Flow in ltr/s
R
1173
1172 4 Float
Flow in Nltr/s
R
1181
1180 4 Float
Flow in cfm
R
1189
1188 4 Float
Flow in Ncfm
R
1197
1196 4 Float
Flow in kg/h
R
1205
1204 4 Float
Flow in kg/min
R
1213
1212 4 Float
Flow in kg/s
R
1221
1220 4 Float
Flow in kW
R
Page 23
Operation
VA 520 EN V1.13 page 23 o 32
Modbus
Register
Register
Address
No.of
Byte
Data
Type
Description
Default
Read
Write
Unit /Comment
1269
1268
4
UInt32
Consumption m³ before
comma
x R
1275
1274
4
UInt32
Consumption Nm³ before
comma
x R
1281
1280
4
UInt32
Consumption ltr before comma
x R
1287
1286
4
UInt32
Consumption Nltr before
comma
x R
1293
1292
4
UInt32
Consumption cf before comma
x R
1299
1298
4
UInt32
Consumption Ncf before
comma
x R
1305
1304
4
UInt32
Consumption kg before
comma
x R
1311
1310
4
UInt32
Consumption kWh before
comma
x R
1347
1346 4 Float
Velocity m/s
1355
1354 4 Float
Velocity Nm/s
1363
1362 4 Float
Velocity Ft/min
1371
1370 4 Float
Velocity NFt/min
1419
1418 4 Float
GasTemp °C
1427
1426 4 Float
GasTemp °F
Remark:
For DS400 / DS 500 / Handheld devices - Modbus Sensor Datatype
„Data Type R4-32“ match with „Data Type Float“
For more additional Modbus values please refer to
VA5xx_Modbus_RTU_Slave_Installation_1.04_EN.doc
Page 24
Operation
VA 520 EN V1.13 page 24 o 32
8.3.3 Pulse /Alarm
Setup Sensor Setup Pulse/ Alarm
8.3.3.1 Pulse output
The maximum frequency for pulse output is 50 pulses per second (50Hz).
The Pulse output is delayed by 1 second.
Pulse value
[m³ /h]
[m³ /min]
[l/min]
0.1 ltr / Pulse
1,8
0,3
300
1ltr / Pulse
18 3 3000
0.1m³ / Pulse
18000
300
300000
1 m³ / Pulse
180000
3000
3000000
Table 1 Maximum flow for pulse output
Entering pulse values that are not allow a presentation to the full scale value, are not allowed. Entries are
discarded and error message displayed.
The galvanically isolated output can be
defined as pulse- or alarm output.
Selection of field „Relay Mode” with key „“
and change modus by pressing key „OK“.
For alarm output following units could be
chosen: kg/min, cfm, ltr/s, m³/h, m/s, °F, °C
and kg/s.
„Value“ defines the Alarm value, „Hyst.“
defines the desired hysteresis and with „Hi-
Lim“ or. „Lo-Lim“ the alarm settings when
the alarm is activated
Hi-Lim: Value over limit
Lo-Lim: Value under limit
For the pulse output following units could be
chosen: kg, cf, ltr and m³. The pulse value
definition to be done in menu „Value“ . Lowest
value is depending on max. flow of sensor and
the max frequency of pulse output of 50Hz.
With „Polarity“ the switching state could be
defined. Pos. = 0 1 neg. 1 0
pos
neg
open
closed
Page 25
Operation
VA 520 EN V1.13 page 25 o 32
8.3.4 User Setup
8.3.4.1 Password
Settings UserSetup Password
8.3.4.2 Language
Settings UserSetup Language
To make changes, first select a menu with
button „“ and confirm selection by pressing
„OK“ .
It is possible to define a password. The
required password length is 4 digits.
Please select with button „“ a figure and
confirm it with „OK“ .Repeat this 4 times.
With „“ the last figure could be deleted.
Password input have to be inserted twice.
Confirmation of input/password by pressing
„OK“.
Factory settings for password at the time of
delivery: 0000 (4 times zero).
Currently 4 languages have been implemented
and could be selected with button „“
Change of language by confirming with “OK”.
Leaving the menu with button “back”.
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Operation
VA 520 EN V1.13 page 26 o 32
8.3.4.3 Display / Touch
Settings UserSetup Display / Touch
8.3.5 Advanced
Settings Advanced
By pressing „Factory Reset“ the sensor is set
back to the factory settings.
With the button „-“ and with button „+“ it is
possible to adjust the backlight / display
brightness.The actual / adjusted backlight
brightness is showed in the graph „Backlight.“
By activation “Dimming after” and entering a
time a display dimming could be set.
With „Rotate Screen“ the display information
could be rotated by 180°.
By activation of „Key Lock“ the operation of
the sensor locked.
Unlocking the keyboard is only possible by
restarting the sensor and calling the operating
menu within the first 10s. To do this, use the
"OK" button to enter the operating menu during
this period
Page 27
Operation
VA 520 EN V1.13 page 27 o 32
8.3.6 4 -20mA
Settings 4-20mA
Settings 4-20mA Channel 1
0.000 m³/h
1098.9 m³/h
169,8 m/s 1098.9 m³/h
1098.9 m³/h
0.000 m³/h
169,8 m/s 1098.9 m³/h
To make changes, first select a menu with button
„“ and confirm selection by pressing „OK“ .
The 4-20 mA Analogue output of the Sensor VA 520 can
be individually adjusted.
It is possible to assign following values „Temperature“,
„Velocity“ und „Flow“ to the channel CH 1.
To make changes, first select the value item with button
„“ .and confirm
Moving between the different measurements values or
to deactivate the 4-20mA with setting to „unused“ by
pressing „OK“.
To the selected measurement value a corresponding /
appropriate unit needs to be defined. Select „Unit“ with
„“ and open menu with „OK“.
Select required unit with „“ and take over by pressing
„OK“.
Here e.g. for the measurement value Flow, procedure
for the other measurements values is analog.
For saving the changes done press button „Save“ to
discard the changes press button “Cancel”.
Leaving the menu with „Back“.
Page 28
Operation
VA 520 EN V1.13 page 28 o 32
Settings 4-20mA Channel 1 AutoRange
Settings 4-20mA Error Current
End Range 169,8m/s 1098,9 m³/h
1098,9 m³/h
The scaling of the 4-20mA channel can be done
automatically "Auto Range = on" or manual "AutoRange
= off" .
With button „“ select the menu item „AutoRange“
select with „OK“ the desired scaling method.
(Automatically or manually)
In case of AutoRange = off with „Scale 4mA“ und
„Scale 20mA“ the scale ranges needs to be defined.
Select with button „“ the item „Scale 4mA“ or „Scale
20mA“ and confirm with „OK“ .
Input of the scaling values will be analogous as
described before for value settings.
Using „CLR“ clears up the complete settings at once.
For „Auto on“ , the max. scaling is calculated based on
the inner tube diameter, max. measurement range and
the reference conditions settings.
Take over of the inputs with „Save“ and leaveing the
menu with „Back“.
This determines what is output in case of an error at the
analog output.
2 mA Sensor error / System error
22 mA Sensor error / System error
None Output according Namur (3.8mA – 20.5 mA)
< 4mA to 3.8 mA Measuring range under range
>20mA to 20.5 mA Measuring range exceeding
To make changes first select a menu item "Current Error"
with button „“ and then select by pressing the „OK“
the desired mode
For saving the changes done press button „Save“ to
discard the changes press button “Cancel”.
Leaving the menu with „Back“.
Page 29
Operation
VA 520 EN V1.13 page 29 o 32
8.3.7 VA 520 Info
Settings Info
Run Time: 2d 21h 23m 12s
Vin: 23,8V Temp: 35,8
92,7 m/s 600m³/h
20 °C
53,1 mm
23 °C
10
Here you get a brief description of the sensor data
incl. the calibration data.
Under Details, you are able to see in addition the
calibration conditions.
Page 30
Operation
VA 520 EN V1.13 page 30 o 32
8.4 MBus
8.4.1 Default Settings communication
Primary Adress*: 1
ID: Serialnumber of Sensor
Baud rate*: 2400
Medium*: depending on medium (Gas or Compressed Air)
Manufacturer ID: CSI
VIF coding: Primary VIF
Both addresses, Primary address and ID, could be automatic searched in the M-Bus system.
8.4.2 Default values transmitted
Value 1 with [Unit]*: Consumption [m³]
Value 2 with [Unit]*: Flow [m³/h]Consumption [m³]
Value 3 with [Unit]*: Gas temperature [°C]
*All Values could be changed / preset in production or with CS Service software (Order-No. 0554 2007)
The Sensor offers two possibilities for coding the
Value Informaition Field (VIF).
Primary VIF (The units and multiplier
correspond to MBus specification 4.8
chapter 8.4.3
Plain text VIF ((units are transmitted as
ASCCII characters. So units that are not
included in MBus specification chapter 8.4.3
are possible
Switch to Plain Text VIF by activation of „Units as
String“.
Page 31
Maintenance / warranty
VA 520 English V1.13 Page 31 of 32
9 Maintenance
The sensor head should be checked regularly for dirt and cleaned if necessary. Should dirt, dust or oil
accumulate on the sensor element, a deviation will occur in the measuring value. An annual check is
recommended. Should the compressed air be heavily soiled this interval must be shortened.
10 Cleaning of the sensor head
The sensor head can be cleaned by carefully moving it in warm water with a small amount of washingup liquid. Avoid physical intervention on the sensor (e.g. using a sponge or brush). If soiling cannot be
removed, service and maintenance must be carried out by the manufacturer.
11 Re-Calibration
If no customer specifications are given then we recommend to carry out calibration every 12 months.
For this purpose the sensor must be sent to the manufacturer.
12 Spare parts and repair
For reasons of measuring accuracy spare parts are not available.
If parts are faulty, they must be sent to the supplier for repair.
If the measuring device is used in important company installations, we recommend keeping a spare
measuring system ready.
13 Calibration
According to DIN ISO certification of the measuring instruments we recommend to calibrate and if
applicable to adjust the instruments regularly from the manufacturer. The calibration intervals should
comply with your internal specification. According to DIN ISO we recommend a calibration interval of
one year for the instrument VA 520.
On request and additional payment, calibration-certificates could be issued.
The precision is given due to use DKD-certified flow meters and verifiable
14 Warranty
If you have reason for complaint we will of course repair any faults free of charge if it can be proven
that they are manufacturing faults. The fault should be reported immediately after it has been found
and within the warranty time guaranteed by us. Excluded from this warranty is damage caused by
improper use and non-adherence to the instruction manual.
The warranty is also cancelled once the instrument has been opened - as far as this has not been
mentioned in the instruction manual for maintenance purposes - or if the serial number in the
instrument has been changed, damaged or removed.
The warranty time for the VA 520 is 12 months. If no other definitions are given the accessory parts
have a warranty time of 6 months. Warranty services do not extend the warranty time.
If in addition to the warranty service necessary repairs, adjustments or similar are carried out the
warranty services are free of charge but there is a charge for other services such as transport and
packaging costs. Other claims, especially those for damage occurring outside the instrument, are not
included unless responsibility is legally binding.
After sales service after the warranty time has elapsed
We are of course there for you even after the warranty time has elapsed. In case of malfunctions,
please send us the instrument with a short-form description of the fault. Please do not forget to
indicate your telephone number so that we can call you in case of any questions.
Page 32
CE Conformity
VA 520 English V1.13 Page 32 of 32
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