CS Instruments VA 500 User manual

VA 500 Bi-directional English 1.24 Seite 1 von 56
EN - English
Instruction manual
Consumption sensor VA 500
for bi-directional measurements
Stationary and mobile
flow and consumption measurement for compressed air and gases

Foreword
VA 500 Bi-directional English 1.24 Seite 2 von 56
I. Foreword
Dear customer,
thank you very much for deciding in favour of the VA 500. 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 500 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.: [phone]
Fax: [phone]
Mail: [email protected]
Web: http://www.cs-instruments.com
Sales Office North / Geschäftsstelle Nord
Gewerbehof 14
D-24955 Harrislee
Tel.: [phone]
Fax: [phone]
Mail: [email protected]
Web: http://www.cs-instruments.com

Table of Content
VA 500 Bi-directional English 1.24 Seite 3 von 56
II. Table of content
I. Foreword ....................................................................................................................... 2
II. Table of content......................................................................................................... 3
1Intended use.................................................................................................................. 5
2Instruments description ............................................................................................... 5
3Safety instructions........................................................................................................ 6
3.1 Warning and information symbols used in these instructions......................................... 6
3.2 Warnings................................................................................................................................. 6
4VA 500 with Display...................................................................................................... 8
5VA 500 without Display................................................................................................. 8
6Technical data............................................................................................................... 9
7Installation....................................................................................................................10
7.1 Pipe/tube requirements ....................................................................................................... 10
7.2 Inlet / outlet runs .................................................................................................................. 10
7.3 Installation VA 500............................................................................................................... 11
7.3.1 ½“ welded nipple with ball valve ½“ ................................................................................. 11
7.3.2 Spot drilling collar with ball valve..................................................................................... 11
7.4 Installation of the Sensor.................................................................................................... 12
7.4.1 Mounting VA 500 onto the ball valve............................................................................... 12
8Measuring ranges........................................................................................................13
8.1 ................................................................................ 14
8.2  ................................................................................... 16
8.3  ................................................................................. 18
8.4  ................................................................................ 20
9Dimension ....................................................................................................................22
10 Electrical wiring........................................................................................................23
10.1 Pining for Modbus RTU, 4..20mA, Pulse or MBus............................................................ 23
10.2 Connection diagrams .......................................................................................................... 24
10.2.1 Modbus............................................................................................................................ 24
10.2.2 Analogue output (4-20mA, Pulse).................................................................................... 24
10.2.3 MBus................................................................................................................................ 24
10.2.4 Ethernet (optional PoE) ................................................................................................... 25

Table of Content
VA 500 Bi-directional English 1.24 Seite 4 von 56
11 Operation...................................................................................................................26
Remark: In version with display only................................................................................26
11.1 Initialization .......................................................................................................................... 27
11.2 Main menu ............................................................................................................................ 27
11.3 Settings................................................................................................................................. 29
11.3.1 Sensor Setup................................................................................................................... 30
11.3.1.1 Input / change tube diameter.................................................................................... 30
11.3.1.2 Input / change consumption counter ........................................................................ 31
11.3.1.3 Definition of the units for flow, velocity, temperature and pressure ......................... 32
11.3.1.4 Advanced settings .................................................................................................... 33
11.3.1.4.1 Definition of the reference conditions................................................................... 33
11.3.1.4.2 Time setting for filtering ........................................................................................ 35
11.3.1.5 Setting of Zeropoint and Low-flow cut off................................................................. 36
11.3.2 Modbus Settings.............................................................................................................. 37
11.3.2.1 Modbus RTU Setup.................................................................................................. 37
11.3.2.2 Modbus TCP (Optional)............................................................................................ 38
11.3.2.2.1 Network Setup DHCP........................................................................................... 38
11.3.2.2.2 Network Settings static IP..................................................................................... 39
11.3.2.2.3 Modbus TCP Settings........................................................................................... 40
11.3.2.3 Modbus Settings Register (2001…2005) ................................................................ 41
11.3.2.4 Values Register (1001 …1500 / 10101… 10500) .................................................... 42
11.3.3 Pulse /Alarm..................................................................................................................... 44
11.3.3.1 Pulse output.............................................................................................................. 44
11.3.4 User Setup....................................................................................................................... 45
11.3.4.1 Password.................................................................................................................. 45
11.3.4.2 Language.................................................................................................................. 45
11.3.4.3 Display / Touch......................................................................................................... 46
11.3.5 Advanced......................................................................................................................... 46
11.3.6 4 -20mA ........................................................................................................................... 47
11.3.7 VA 500 Info...................................................................................................................... 49
11.4 MBus (optional).................................................................................................................... 50
11.4.1 Default Settings communication...................................................................................... 50
11.4.2 Default values transmitted ............................................................................................... 50
12 Status / Error messages...........................................................................................51
12.1 Status messages.................................................................................................................. 51
12.2 Error messages.................................................................................................................... 52
•Low Voltage............................................................................................................................... 52
•Heater Error............................................................................................................................... 52
•Internal Error............................................................................................................................. 52
•Temp out of Range ................................................................................................................... 52
13 Maintenance..............................................................................................................53
14 Cleaning of the sensor head....................................................................................53
15 Re-Calibration...........................................................................................................53
16 Spare parts and repair..............................................................................................53
17 Calibration.................................................................................................................53
18 Warranty....................................................................................................................53

Intended Use
VA 500 Bi-directional English 1.24 Seite 5 von 56
1 Intended use
The VA 500 consumption sensor for bi-directional measurements is used for continuous flow
measurement in both directions.
The VA 500 consumption sensor for bi-directional measurements is designed and constructed
exclusively for the intended purpose described here and may only be used accordingly.
The user must check whether the instrument is suitable for the selected application. It must be
ensured that the medium is compatible with the wetted parts. The technical data listed in the data
sheet are binding.
Improper handling or operation outside the technical specifications is not permitted. Claims of any kind
based on improper use are excluded.
Operating principle:
The VA 500 consumption probe operates according to the calorimetric measuring method.
The basis of this measuring method is the electrical heating of the mechanically protected built-in
sensor. The mass flow, the volume flow and the flow velocity can be measured and determined by the
resulting heat flow to the passing medium (gas).
With the calorimetric measurement method (based on the measurement principle), the operating
temperature and pressure of the medium have no influence on the measurement result, only the
material data of the gas component are decisive.
The integrated flow direction recognition allows the bi-directional flow measurement with display of the
flow values. The flow direction is indicated by arrows in blue and green.
A meter reading is available for each flow direction, displayed in the colours blue and green according
to flow direction.
2Instruments description
The VA 500 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 for two
directions
•Input inner tube diameter 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, Ethernet( also PoE) and MBus optional
•2x Analogoutput 4..20mA
•2x Pulse output galv. isolated.
CS Instruments Service Software
•Analogaoutput 4...20 mA scaleabler
•Selection of gas type (Air, Nitrogen, Argon, Nitrous oxide, CO2, Oxygen, Natural gas)
•Read out Service data
•Sensordiagnoses

Safety Instructions
VA 500 Bi-directional English 1.24 Seite 6 von 56
3 Safety instructions
3.1 Warning and information symbols used in these instructions
In these operating instructions, this symbol is found next to all work
safety instructions where there is danger to life and limb. Observance of these
instructions and cautious behaviour are particularly important in these cases.
All work safety instructions must also be shared with other users. In addition to
the instructions in these operating instructions, the general safety and accident
prevention regulations must be observed.
This symbol is located at points in the operating instructions where
special attention must be paid to ensure that the guidelines, regulations,
instructions and the correct procedure for the work are observed and that
damage and destruction are prevented.
This symbol indicates important information or measures for the
protection of the environment.
This symbol indicates particularly important information for operators.
3.2 Warnings
Warnings are subdivided according to the hazard levels DANGER, WARNING
and CAUTION. Meaning of the warnings:
DANGER
Immediate danger!
Failure to observe this information may result in
serious injury or death.
WARNING
Potentially dangerous situation!
Failure to observe this information may result in
serious injury or death.
CAUTION
Potentially dangerous situation!
Failure to observe this information may result in
moderate to minor injuries.
NOTE
Potentially dangerous situation!
Failure to observe this information may result in
property damage.

Scaling Analouge outputs
VA 500 Bi-directional English 1.24 Seite 7 von 56
Please check whether this manual also corresponds to the device type.
This manual must be read before installation, commissioning and maintenance.
Please observe all instructions given in this operating manual. It contains basic information that
must be observed during installation, operation and maintenance.
In addition to these operating instructions, local or national regulations must be observed where
applicable.
Make sure that the VA 500 is only operated within the permissible limits specified on the
nameplate. Otherwise there is a danger to people and material and malfunctions and operating
faults may occur
Improper handling can lead to considerable personal injury and damage to property.
All activities described in this operating manual may only be carried out by qualified personnel
with the qualifications described below
The safety ring attached to the sensor head must always be undamaged and correctly fitted..
The screw-in device must be screwed in pressure-tight.
The clamping sleeve must be tightened with a tightening torque of 20-30 Nm.
In the event of non-observance or non-compliance, the manufacturer cannot be held liable for any
resulting damage. Interventions of any kind on the device, if they do not correspond to the
intended and described procedures, lead to the warranty being voided and to the exclusion of
liability.
The device is intended exclusively for the described purpose.
We do not assume any warranty with regard to the suitability for any particular purpose and no
liability for errors contained in these operating instructions. Nor for consequential damages in
connection with the delivery, performance or use of the device.
Do not exceed the pressure range of 50 bar.
Over 10 bar we recommend using the high-pressure protection for a safe installation.
The installation has to be carried out by authorized professionals
Qualified employees from the measurement and control technology branch should only carry out
adjustments and calibrations
CAUTION
Danger of burns when touching surfaces!
During operation, the components, shaft and connection
nut, can reach a temperature close to the process temperature.
To avoid burns, protection against contact must be ensured at
elevated process temperatures, as there is a risk of medium to
light injuri.
Burnable gases
If this consumption sensor is used for measurement of burnable gases (e.g. natural gas) we
explicitly point out that the sensor has no DVGW (= German Technical Association for Gas and
Water) admission, however, it can be used for natural gas.
A DVGW admission is not mandatory.
The consumption sensor VA 500 corresponds with the latest state of technology and can
generally be used for burnable and non-burnable gases.
The area outside the pipe (environment of the sensor) is not allowed to be an explosive area (Ex-
area)

Scaling Analouge outputs
VA 500 Bi-directional English 1.24 Seite 8 von 56
4 VA 500 with Display
Input of internal pipe diameter and scaling of the analogue outputs is done via the keyboard on
the display, details and sequence see chapter "Operation".
Please enter inner diameter of the pipe!
Values indicated in the display:
Actual value in m³/h, m³/min etc.
Counter in m³, l, cf
as well as pulse output, 1 pulse per m³, l, cf
are calculated according to the diameter set. Please take the analogue value for flow rate
4…20 mA from the tables on pages13 to 20
4 mA always corresponds with the starting value 0 m³/h, 0 m³/min. The final value 20 mA can be taken
from the tables on pages 13 to 20
Example VA 500 Standard:
1" with inner diameter 25.0 mm, 4 mA = 0 m³/h and 20 mA = 122.2 m³/h
2" with inner diameter 53.1 mm, 4 mA = 0 m³/h und 20 mA = 600.0 m³/h
5 VA 500 without Display
No adjustments are necessary at the consumption sensor.
The respective final values for the flow rate can be taken from the tables on the pages 13 to 20.
Analogue start value 4 mA is always set as scaling value 0 m³/h, 0 m³/min etc.
Analogue end value 20 mA is the final value, see tables pages 14 -19.
Example VA 500 Standard:
1" with inner diameter 25.0 mm, 4 mA = 0 m³/h and 20 mA = 122.2 m³/h
2" with inner diameter 53.1 mm, 4 mA = 0 m³/h und 20 mA = 600.0 m³/h

Technical data
VA 500 Bi-directional English 1.24 Seite 9 von 56
6Technical data
Measurement: Flow, Consumption and Velocity
Reference: Standard settings ex works:
DIN 1945, ISO 1217 at 20°C and 1000 mbar
other standards can be adjusted by Display keys (optional)
or means of the CS Service Software.
Selectable Units: m³/h (Standard settings ex- factory)
m³/min, l/min, l/s, ft/min, cfm, m/s, kg/h, kg/min, kg/s, °C, °F
Measuring principle: calorimetric measurement
Sensor: Pt45, Pt1000
Measuring medium: Air, gases
Operating temperature: -20 ... 70°C housing
-30 ... 100°C probe tube
Relative humidity for
measuring medium: < 95 % r.H (no condensation on the sensor element allowed)
Operating pressure: up to 50 bar
Power supply: 18 to 36 VDC
Power consumption: max. 5W
Digital output: RS 485 (Modbus RTU)
Optional Ethernet (also PoE) and MBus
Analog output: 4...20 mA (see tables page 13 -20),
max. burden < 500 Ohm
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: optional TFT 1.8“ Resolution 220 x 176
Mounting thread: G ½“, optional ½” NPT
Material: Stainless steel 1.4301 / 1.4404
Protection class IP65
‘* m.v. = measured values
f.s. = full scale

Installation
VA 500 Bi-directional English 1.24 Seite 10 von 56
7 Installation
7.1 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
•.
7.2 Inlet / outlet runs
In order to maintain the accuracy stipulated in the data sheets, the sensor must be inserted in the
centre of a straight pip e section with an undisturbed flow progression.
An undisturbed flow progression is achieved if the sections in front of the sensor (inlet) and behind the
sensor (outlet) are sufficiently long, straight and without any obstructions such as edges, seams,
curves etc.
Therefore, it is necessary to ensure the recommended inlet and outlet runs.
Table Inlet / Outlet runs
Flow obstruction before the measurement
section
Min length
Inlet run (L1)
Slight curve
(elbow < 90°)
12 x D
Reduction
(Pipe narrows to the measurement section)
15 x D
Expansion
(Pipe expands to the measurement section)
15 x D
90° elbow or T-piece
15 x D
2x elbow á 90°
in einer Ebene
20 x D
2x elbow á 90°
3-dimensional
35 x D
Control valve
45 x D
15x D 15x D
15x D 15x D
15x D 15x D
20 x D 20 x D
35 x D 35 x D
45 x D 45 x D
The values represent the min. lengths. In case the min. inlet / outlet runs could not be ensured, it must
be expected to get increased or significant deviations of the measurement values.

Installation
VA 500 Bi-directional English 1.24 Seite 11 von 56
7.3 Installation VA 500
The installation of the sensor is done via a ball valve ½ ".
If no valid measuring point with a ball valve ½ " is available there are following ways to set up a
measuring point.
7.3.1 h 
7.3.2 Spot drilling collar with ball valve
In case the system could not be shut down, means to be set depressurized, there could be used the
CS spot drilling collar (Order-No. 0530 1108) and drilling jig (Order-No. 0530 1108) to drill through the
ball valve.
Important:
Ensure that the system is in shut down, ie. depressurized.
Note for installation with ball valve
Ball valve R 1/2“, DN 15
Passage ball valve: Minimum Ø15 mm

Installation
VA 500 Bi-directional English 1.24 Seite 12 von 56
7.4 Installation of the Sensor
7.4.1 Mounting VA 500 onto the ball valve
•Assembly is carried out by inserting the connection thread with gasket. (G1/2“
thread, SW 32) into the ball valve with ½"internal thread.
The sensor has be tighten by hand as far as possible and then tighten with
stipulated torque of 25-30 Nm.
It must be ensured that the installation is pressure-tight.
•The sensor is then inserted to the required immersion depth (sensor tip in the
middle of pipe) and aligned according to the direction of the airflow.
A depth scale engraved on the probe tube, a flow alignment arrow and an
aligning device will be of help for you.
Once the sensor has been aligned the adapter sleeve must be tighten
with stipulated torque of 20-30Nm (SW 17).
WARNING
Components under high pressure! Risk of injury if the flow sensor
is not installed in a pressure-tight manner.
After installation, be sure to check and ensure the pressure tightness
of the connection. Do not work directly over the sensor, but next to it to
minimise possible hazards.
Attention: Alignment of the sensor must not be modified when tightening the connection thread and
adapter sleeve. In this case, please check the immersion depth and alignment again and
correct it if necessary. The angular deviation should not be greater than 2° in relation to
ideal position as otherwise the measuring accuracy will decrease.
Calculation mounting depth: Alignment flow direction
Mounting depth = X + Y
dA = outer diameter
X = dA / 2
y
dA
x
160
170
180
Installation depth
Engraved depth scale for
accurate installation
Safety ring
Adapter sleeve
Connection thread
Sensor alignment
A max. angle deviation of ±2° is permitted in order to ensure correct measured values.
Indication flow directions

Measuring ranges
VA 500 Bi-directional English 1.24 Seite 13 von 56
8Measuring ranges
The consumption sensor VA500 is available in 4 different versions:
•Low Speed max. measuring range of 50 m/s
•Standard max. measuring range of 92,7 m/s
•Max–Version max. measuring range of 185.0 m/s
•High speed–Version max. measuring range of 224 m/s
The sensors are programmed to pipe inner diameter of 53,1 mm.
Measuring range Analogoue output Scaling
•Low Speed 0… 323,6 m³/h 4mA = 0 m³h, 20mA = 323,6 m³/h
•Standard 0 … 600 m³/h 4mA = 0 m³h, 20mA = 600 m³/h
•Max–Version 0 ... 1197,59 m³/h 4mA = 0 m³h, 20mA = 1197,59 m³/h
•Highspeed–Version 0 … 1450,06 m³/h 4mA = 0 m³h, 20mA = 1450,06 m³/h
In case of use in other inner pipe diameter the diameter, using the display version, the diameter has to be
set first.
The corresponding scale values for the respective version could be found in sections 5.1 to 5.3.
Example:
Pipe 1“, Inner diameter 25mm Measuring range Analogoue output Scaling
•Low Speed 0 … 65,9 m³/h 4mA = 0 m³h, 20mA = 65,9 m³/h
•Grundversion( Standard) 0 … 122,2 m³/h 4mA = 0 m³h, 20mA = 122,2 m³/h
•Max–Version 0 ... 243,88 m³/h 4mA = 0 m³h, 20mA = 243,88 m³/h
•Highspeed–Version 0 … 295,30 m³/h 4mA = 0 m³h, 20mA = 295,30 m³/h
For changing the inner pipe diameter and adjusting the 4…20mA scaling, please refer to chapter
“Operation”.
Please note:
The consumption sensor VA 500 Bi directional corresponds with the latest state of technology and can
generally be used for burnable and non-burnable gases.
If this consumption sensor is used for measurement of burnable gases (e.g. natural gas) we explicitly
point out that the sensor has no DVGW admission, however, it can be used for
burnable gases. A DVGW admission is not mandatory.
For the use in e.g. natural gas, the sensor will be calibrated in natural gas. The calibration protocol
(inspection certificate) is included in the scope of delivery.
The area outside the pipe (environment of the sensor) is not allowed to be an explosive area. (Ex area) .

Measuring ranges
VA 500 Bi-directional English 1.24 Seite 14 von 56
8.1 
Inner diameter
of the pipe
Flow
(final value of measuring range in Nm³/h)
Max.
Inch
mm
Air2)
Air 3)
Ar3)
CO23)
N23)
O23)
N2O3)
Natural
gas3)
Methan
m/s
1/4"
6,0
2,5
2,3
4,0
2,5
2,3
2,4
2,5
1,5
50
10,0
8,1
7,4
12,6
8,0
7,4
7,7
7,9
4,8
50
15,0
21,0
19,3
32,8
20,8
19,3
20,0
20,6
12,4
50
1/2"
16,1
24,6
22,6
38,4
24,3
22,6
23,4
24,1
14,6
50
3/4"
21,7
48,1
44,2
75,1
47,6
44,2
45,8
47,1
28,4
50
1"
25,0
65,9
60,6
103,1
65,2
60,6
62,8
64,6
39,0
50
26,0
71,7
65,9
112,1
70,9
65,9
68,3
70,3
42,4
50
27,3
79,7
73,2
124,5
78,8
73,2
75,9
78,1
47,1
50
28,5
87,4
80,4
136,6
86,5
80,4
83,3
85,7
51,7
50
30,0
97,6
89,7
152,6
96,6
89,7
93,0
95,7
57,7
50
1 1/4"
32,8
118,0
108,5
184,5
116,8
108,5
112,5
115,8
69,8
50
36,0
143,6
132,1
224,6
142,1
132,1
136,9
140,9
85,0
50
36,3
146,2
134,5
228,6
144,7
134,5
139,4
143,4
86,5
50
1 1/2"
39,3
172,9
159,0
270,4
171,1
159,0
164,9
169,6
102,3
50
40,0
179,4
164,9
280,4
177,5
164,9
171,0
175,9
106,1
50
41,9
196,9
181,0
307,8
194,8
181,0
187,7
193,1
116,5
50
43,1
210,1
193,2
328,5
207,9
193,2
200,3
206,1
124,3
50
45,8
238,4
219,3
372,8
235,9
219,3
227,3
233,8
141,1
50
2"
50,0
286,3
263,3
447,6
283,3
263,3
272,9
280,8
169,4
50
51,2
300,6
276,4
469,9
297,4
276,4
286,5
294,8
177,9
50
53,1
323,7
297,6
506,1
320,3
297,6
308,6
317,5
191,5
50
54,5
341,4
313,9
533,8
337,8
313,9
325,5
334,8
202,0
50
57,5
382,3
351,6
597,8
378,4
351,6
364,5
375,0
226,3
50
60,0
417,3
383,8
652,5
413,0
383,8
397,9
409,3
247,0
50
64,2
479,5
441,0
749,8
474,6
441,0
457,2
470,3
283,8
50
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring ranges
VA 500 Bi-directional English 1.24 Seite 15 von 56
Inner diameter
of the pipe
Flow
(final value of measuring range in Nm³/h)
Max.
Inch
mm
Air 2)
Air 3)
Ar3)
CO23)
N23)
O23)
N2O3)
Natural gas3)
Methan
m/s
2 1/2"
65,0
492,2
452,6
769,5
487,1
452,6
469,2
482,7
291,2
50
70,3
577,8
531,3
903,4
571,8
531,3
550,9
566,7
341,9
50
71,1
591,0
543,5
924,1
584,9
543,5
563,5
579,7
349,7
50
76,1
678,7
624,1
1061,2
671,7
624,1
647,1
665,7
401,6
50
3"
80,0
751,9
691,4
1175,5
744,1
691,4
716,8
737,4
444,9
50
82,5
799,6
735,3
1250,2
791,3
735,3
762,3
784,2
473,2
50
84,9
846,8
778,7
1324,0
838,0
778,7
807,3
830,5
501,1
50
90,0
952,7
876,1
1489,6
942,8
876,1
908,3
934,4
563,8
50
4"
100,0
1177,6
1082,9
1841,2
1165,4
1082,9
1122,7
1155,0
696,9
50
107,1
1352,4
1243,7
2114,5
1338,4
1243,7
1289,4
1326,4
800,3
50
110,0
1426,6
1311,9
2230,5
1411,8
1311,9
1360,2
1399,2
844,2
50
5"
125,0
1844,5
1696,1
2883,8
1825,3
1696,1
1758,5
1809,0
1091,5
50
133,7
2110,1
1940,5
3299,2
2088,2
1940,5
2011,8
2069,6
1248,7
50
6"
150,0
2659,2
2445,4
4157,6
2631,6
2445,4
2535,3
2608,1
1573,6
50
159,3
2999,2
2758,0
4689,2
2968,0
2758,0
2859,4
2941,6
1774,8
50
182,5
3941,1
3624,2
6161,8
3900,1
3624,2
3757,4
3865,4
2332,1
50
190,0
4271,6
3928,2
6678,7
4227,3
3928,2
4072,6
4189,6
2527,8
50
8"
200,0
4738,8
4357,7
7409,0
4689,5
4357,7
4517,9
4647,7
2804,2
50
206,5
5051,8
4645,6
7898,4
4999,3
4645,6
4816,4
4954,8
2989,4
50
10"
250,0
7413,2
6817,1
11590,4
7336,1
6817,1
7067,7
7270,8
4386,8
50
260,4
8052,4
7404,9
12589,8
7968,7
7404,9
7677,1
7897,7
4765,0
50
12"
300,0
10687,7
9828,3
16710,1
10576,6
9828,3
10189,6
10482,4
6324,5
50
309,7
11390,0
10474,2
17808,1
11271,6
10474,2
10859,2
11171,2
6740,1
50
339,6
13695,5
12594,2
21412,7
13553,1
12594,2
13057,2
13432,4
8104,4
50
400,0
19000,4
17472,6
29706,8
18802,9
17472,6
18114,9
18635,4
11243,6
50
500,0
29688,1
27300,9
46416,9
29379,5
27300,9
28304,5
29117,7
17568,1
50
600,0
42750,8
39313,3
66840,4
42306,5
39313,3
40758,4
41929,6
25298,0
50
700,0
58188,6
53509,8
90977,1
57583,9
53509,8
55476,8
57070,8
34433,4
50
800,0
76001,4
69890,3
118827,3
75211,6
69890,3
72459,4
74541,4
44974,3
50
900,0
96189,3
88454,9
150390,8
95189,7
88454,9
91706,5
94341,5
56920,6
50
1000,0
118752,2
109203,6
185667,6
117518,1
109203,6
113217,9
116471,0
70272,3
50
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring ranges
VA 500 Bi-directional English 1.24 Seite 16 von 56
8.2 Maximum Flow Ranges Standard
Inner diameter
of the pipe
Flow
(final value of measuring range in Nm³/h)
Max.
Inch
mm
Air2)
Air 3)
Ar3)
CO23)
N23)
O23)
N2O3)
Natural gas3)
Methan
m/s
1/4"
6,0
4,7
4,3
7,4
4,7
4,3
4,5
4,6
2,8
92,7
10,0
14,9
13,7
23,4
14,8
13,7
14,2
14,7
8,8
92,7
15,0
38,9
35,8
60,9
38,5
35,8
37,1
38,2
23,0
92,7
1/2"
16,1
45,6
41,9
71,3
45,1
41,9
43,4
44,7
27,0
92,7
3/4"
21,7
89,1
81,9
139,3
88,2
81,9
84,9
87,4
52,7
92,7
1"
25,0
122,2
112,4
191,1
120,9
112,4
116,4
119,9
72,3
92,7
26,0
132,9
122,2
207,8
131,5
122,2
126,5
130,3
78,6
92,7
27,3
147,7
135,8
230,9
146,1
135,8
140,6
144,8
87,4
92,7
28,5
162,0
149,0
253,3
160,3
149,0
154,3
158,9
95,9
92,7
30,0
180,9
166,4
282,9
179,0
166,4
172,3
177,5
107,1
92,7
1 1/4"
32,8
218,8
201,2
342,1
216,5
201,2
208,4
214,6
129,5
92,7
36,0
266,3
244,9
416,4
263,5
244,9
253,6
261,2
157,6
92,7
36,3
271,1
249,3
423,9
268,3
249,3
258,2
265,9
160,4
92,7
1 1/2"
39,3
320,6
294,8
501,3
317,3
294,8
305,3
314,5
189,7
92,7
40,0
332,6
305,8
519,9
329,1
305,8
316,7
326,2
196,8
92,7
41,9
365,0
335,6
570,6
361,2
335,6
347,6
358,0
216,0
92,7
43,1
389,5
358,2
609,0
385,4
358,2
370,9
382,0
230,5
92,7
45,8
442,0
406,5
691,1
437,4
406,5
421,0
433,5
261,6
92,7
2"
50,0
530,8
488,1
829,8
525,2
488,1
505,5
520,6
314,1
92,7
51,2
557,2
512,4
871,2
551,4
512,4
530,7
546,5
329,7
92,7
53,1
600,1
551,8
938,2
593,8
551,8
571,5
588,6
355,1
92,7
54,5
632,9
582,0
989,5
626,3
582,0
602,7
620,8
374,5
92,7
57,5
708,9
651,9
1108,3
701,5
651,9
675,8
695,2
419,5
92,7
60,0
773,7
711,5
1209,7
765,6
711,5
736,8
758,9
457,9
92,7
64,2
889,1
817,6
1390,0
879,8
817,6
846,7
872,0
526,1
92,7
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring ranges
VA 500 Bi-directional English 1.24 Seite 17 von 56
Inner diameter
of the pipe
Flow
(final value of measuring range in Nm³/h)
Max.
Inch
mm
Air 2)
Air 3)
Ar3)
CO23)
N23)
O23)
N2O3)
Natural gas3)
Methan
m/s
2 1/2"
65,0
912,5
839,1
1426,6
902,9
839,1
869,0
895,0
540,0
92,7
70,3
1071,2
985,1
1674,8
1060,0
985,1
1020,2
1050,7
633,9
92,7
71,1
1095,8
1007,7
1713,1
1084,3
1007,7
1043,5
1074,7
648,4
92,7
76,1
1258,3
1157,2
1967,3
1245,2
1157,2
1198,3
1234,2
744,6
92,7
3"
80,0
1394,0
1281,9
2179,4
1379,4
1281,9
1327,5
1367,2
824,9
92,7
82,5
1482,5
1363,3
2317,7
1466,9
1363,3
1411,8
1454,0
877,2
92,7
84,9
1570,0
1443,7
2454,5
1553,5
1443,7
1495,1
1539,8
929,0
92,7
90,0
1766,4
1624,3
2761,6
1747,9
1624,3
1682,1
1732,4
1045,3
92,7
4"
100,0
2183,3
2007,8
3413,5
2160,5
2007,8
2079,2
2141,4
1292,0
92,7
107,1
2507,4
2305,7
3920,1
2481,1
2305,7
2387,8
2459,2
1483,7
92,7
110,0
2645,0
2432,3
4135,3
2617,3
2432,3
2518,9
2594,2
1565,2
92,7
5"
125,0
3419,6
3144,7
5346,3
3383,8
3144,7
3256,6
3353,9
2023,6
92,7
133,7
3912,2
3597,6
6116,5
3871,3
3597,6
3725,7
3837,0
2315,1
92,7
6"
150,0
4930,2
4533,7
7708,0
4878,6
4533,7
4695,1
4835,4
2917,4
92,7
159,3
5560,5
5113,3
8693,4
5502,3
5113,3
5295,3
5453,6
3290,4
92,7
182,5
7306,7
6719,2
11423,6
7230,3
6719,2
6958,3
7166,4
4323,8
92,7
190,0
7919,6
7282,8
12381,8
7836,8
7282,8
7542,0
7767,5
4686,5
92,7
8"
200,0
8785,7
8079,2
13735,8
8693,8
8079,2
8366,8
8616,9
5199,0
92,7
206,5
9366,0
8612,9
14643,2
9268,0
8612,9
8919,4
9186,1
5542,4
92,7
10"
250,0
13744,0
12638,9
21487,8
13600,2
12638,9
13088,7
13480,0
8133,1
92,7
260,4
14929,1
13728,7
23340,6
14772,9
13728,7
14217,2
14642,3
8834,4
92,7
12"
300,0
19815,0
18221,7
30979,4
19607,7
18221,7
18870,1
19434,3
11725,6
92,7
309,7
21117,1
19419,1
33015,1
20896,1
19419,1
20110,1
20711,4
12496,1
92,7
339,6
25391,4
23349,7
39697,7
25125,7
23349,7
24180,6
24903,6
15025,5
92,7
400,0
35226,7
32394,1
55074,4
34858,0
32394,1
33546,9
34549,9
20845,6
92,7
500,0
55041,6
50615,8
86053,8
54465,7
50615,8
52417,0
53984,3
32571,2
92,7
600,0
79260,0
72886,8
123917,4
78430,6
72886,8
75480,5
77737,4
46902,5
92,7
700,0
107881,6
99207,0
168665,4
106752,8
99207,0
102737,4
105809,2
63839,5
92,7
800,0
140906,6
129576,5
220297,7
139432,2
129576,5
134187,6
138199,7
83382,2
92,7
900,0
178334,9
163995,2
278814,3
176468,9
163995,2
169831,2
174909,1
105530,6
92,7
1000,0
220166,6
202463,2
344215,1
217862,8
202463,2
209668,2
215937,1
130284,7
92,7
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring ranges
VA 500 Bi-directional English 1.24 Seite 18 von 56
8.3 Maximum Flow ranges Max speed
Inner diameter
of the pipe
Flow
(final value of measuring range in Nm³/h)
Max.
Inch
mm
Air 2)
Air 3)
Ar3)
CO23)
N23)
O23)
N2O3)
Natural gas3)
Methan
m/s
1/4"
6,0
9,4
8,7
14,7
9,3
8,7
9,0
9,2
5,6
185,0
10,0
29,8
27,4
46,6
29,5
27,4
28,4
29,2
17,6
185,0
15,0
77,7
71,4
121,4
76,9
71,4
74,1
76,2
46,0
185,0
1/2"
16,1
91,0
83,7
142,2
90,0
83,7
86,7
89,2
53,8
185,0
3/4"
21,7
177,8
163,5
278,0
176,0
163,5
169,5
174,4
105,2
185,0
1"
25,0
243,9
224,3
381,3
241,3
224,3
232,5
239,2
144,3
185,0
26,0
265,2
243,9
414,6
262,4
243,9
252,8
260,1
156,9
185,0
27,3
294,7
271,0
460,8
291,7
271,0
281,0
289,1
174,4
185,0
28,5
323,3
297,3
505,5
320,0
297,3
308,3
317,1
191,3
185,0
30,0
361,1
332,0
564,5
357,3
332,0
344,3
354,1
213,7
185,0
1 1/4"
32,8
436,7
401,6
682,8
432,2
401,6
416,3
428,3
258,4
185,0
36,0
531,5
488,7
831,0
526,0
488,7
506,7
521,3
314,5
185,0
36,3
541,1
497,6
845,9
535,4
497,6
515,8
530,7
320,2
185,0
1 1/2"
39,3
639,8
588,4
1000,4
633,2
588,4
610,0
627,6
378,6
185,0
40,0
663,7
610,3
1037,7
656,8
610,3
632,7
650,9
392,7
185,0
41,9
728,4
669,8
1138,9
720,8
669,8
694,5
714,4
431,0
185,0
43,1
777,3
714,8
1215,4
769,3
714,8
741,1
762,4
460,0
185,0
45,8
882,2
811,2
1379,3
873,0
811,2
841,1
865,2
522,0
185,0
2"
50,0
1059,2
974,1
1656,1
1048,2
974,1
1009,9
1038,9
626,8
185,0
51,2
1112,1
1022,6
1738,7
1100,5
1022,6
1060,2
1090,7
658,1
185,0
53,1
1197,6
1101,3
1872,4
1185,1
1101,3
1141,8
1174,6
708,7
185,0
54,5
1263,1
1161,6
1974,9
1250,0
1161,6
1204,3
1238,9
747,5
185,0
57,5
1414,7
1300,9
2211,8
1400,0
1300,9
1348,7
1387,5
837,1
185,0
60,0
1544,1
1420,0
2414,2
1528,1
1420,0
1472,2
1514,5
913,7
185,0
64,2
1774,3
1631,7
2774,1
1755,9
1631,7
1691,6
1740,2
1050,0
185,0
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring ranges
VA 500 Bi-directional English 1.24 Seite 19 von 56
Inner diameter
of the pipe
Flow
(final value of measuring range in Nm³/h)
Max.
Inch
mm
Air 2)
Air 3)
Ar3)
CO23)
N23)
O23)
N2O3)
Natural gas3)
Methan
m/s
2 1/2"
65,0
1821,0
1674,6
2847,2
1802,1
1674,6
1736,2
1786,1
1077,6
185,0
70,3
2137,9
1966,0
3342,5
2115,6
1966,0
2038,2
2096,8
1265,1
185,0
71,1
2186,8
2011,0
3419,0
2164,1
2011,0
2084,9
2144,8
1294,0
185,0
76,1
2511,2
2309,3
3926,3
2485,1
2309,3
2394,2
2463,0
1486,0
185,0
3"
80,0
2781,9
2558,2
4349,5
2753,0
2558,2
2652,3
2728,5
1646,2
185,0
82,5
2958,5
2720,6
4625,6
2927,8
2720,6
2820,6
2901,7
1750,7
185,0
84,9
3133,1
2881,2
4898,6
3100,6
2881,2
2987,1
3073,0
1854,1
185,0
90,0
3525,1
3241,7
5511,5
3488,5
3241,7
3360,8
3457,4
2086,0
185,0
4"
100,0
4357,2
4006,9
6812,5
4311,9
4006,9
4154,1
4273,5
2578,4
185,0
107,1
5003,9
4601,5
7823,5
4951,9
4601,5
4770,7
4907,8
2961,1
185,0
110,0
5278,6
4854,1
8253,0
5223,7
4854,1
5032,6
5177,2
3123,6
185,0
5"
125,0
6824,5
6275,7
10670,0
6753,6
6275,7
6506,4
6693,4
4038,4
185,0
133,7
7807,5
7179,7
12207,0
7726,4
7179,7
7443,7
7657,5
4620,1
185,0
6"
150,0
9839,0
9047,9
15383,2
9736,8
9047,9
9380,5
9650,0
5822,3
185,0
159,3
11096,9
10204,6
17349,9
10981,6
10204,6
10579,7
10883,7
6566,7
185,0
182,5
14581,9
13409,4
22798,7
14430,4
13409,4
13902,4
14301,8
8628,9
185,0
190,0
15805,1
14534,2
24711,1
15640,8
14534,2
15068,5
15501,5
9352,7
185,0
8"
200,0
17533,5
16123,6
27413,4
17351,3
16123,6
16716,3
17196,7
10375,5
185,0
206,5
18691,7
17188,7
29224,2
18497,4
17188,7
17820,6
18332,6
11060,9
185,0
10"
250,0
27428,8
25223,2
42884,5
27143,7
25223,2
26150,4
26901,8
16231,1
185,0
260,4
29793,8
27398,1
46582,2
29484,2
27398,1
28405,2
29221,4
17630,6
185,0
12"
300,0
39544,5
36364,7
61827,4
39133,6
36364,7
37701,5
38784,8
23400,7
185,0
309,7
42143,0
38754,3
65890,2
41705,1
38754,3
40179,0
41333,5
24938,4
185,0
339,6
50673,3
46598,7
79227,1
50146,7
46598,7
48311,6
49699,8
29986,2
185,0
400,0
70301,3
64648,4
109915,3
69570,8
64648,4
67024,9
68950,8
41601,2
185,0
500,0
109845,8
101013,2
171742,6
108704,3
101013,2
104726,4
107735,6
65001,8
185,0
600,0
158177,9
145459,0
247309,4
156534,3
145459,0
150806,1
155139,3
93602,6
185,0
700,0
215297,7
197985,8
336615,6
213060,5
197985,8
205263,8
211161,8
127403,5
185,0
800,0
281205,2
258593,7
439661,2
278283,1
258593,7
268099,7
275803,2
166404,6
185,0
900,0
355900,4
327282,7
556446,2
352202,1
327282,7
339313,7
349063,4
210605,9
185,0
1000,0
439383,1
404052,7
686970,6
434817,4
404052,7
418905,8
430942,5
260007,2
185,0
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring ranges
VA 500 Bi-directional English 1.24 Seite 20 von 56
8.4 Maximum Flow ranges 
Inner diameter
of the pipe
Flow
(final value of measuring range in Nm³/h)
Max.
Inch
mm
Air 2)
Air 3)
Ar3)
CO23)
N23)
O23)
N2O3)
Natural gas3)
Methan
m/s
1/4"
6,0
11,4
10,5
17,8
11,3
10,5
10,9
11,2
6,7
224,0
10,0
36,1
33,2
56,4
35,7
33,2
34,4
35,4
21,4
224,0
15,0
94,1
86,5
147,0
93,1
86,5
89,7
92,2
55,7
224,0
1/2"
16,1
110,2
101,3
172,2
109,0
101,3
105,0
108,0
65,2
224,0
3/4"
21,7
215,3
198,0
336,7
213,1
198,0
205,3
211,2
127,4
224,0
1"
25,0
295,3
271,6
461,7
292,2
271,6
281,5
289,6
174,7
224,0
26,0
321,1
295,3
502,0
317,8
295,3
306,1
314,9
190,0
224,0
27,3
356,9
328,2
557,9
353,1
328,2
340,2
350,0
211,2
224,0
28,5
391,5
360,0
612,1
387,4
360,0
373,2
384,0
231,7
224,0
30,0
437,2
402,0
683,6
432,7
402,0
416,8
428,8
258,7
224,0
1 1/4"
32,8
528,7
486,2
826,7
523,3
486,2
504,1
518,6
312,9
224,0
36,0
643,5
591,8
1006,1
636,8
591,8
613,5
631,2
380,8
224,0
36,3
655,1
602,4
1024,3
648,3
602,4
624,6
642,5
387,7
224,0
1 1/2"
39,3
774,7
712,4
1211,3
766,7
712,4
738,6
759,8
458,5
224,0
40,0
803,6
739,0
1256,4
795,2
739,0
766,1
788,2
475,5
224,0
41,9
882,0
811,0
1378,9
872,8
811,0
840,9
865,0
521,9
224,0
43,1
941,2
865,5
1471,6
931,4
865,5
897,3
923,1
557,0
224,0
45,8
1068,1
982,2
1670,0
1057,0
982,3
1018,4
1047,6
632,1
224,0
2"
50,0
1282,5
1179,4
2005,2
1269,2
1179,4
1222,8
1257,9
758,9
224,0
51,2
1346,5
1238,2
2105,2
1332,5
1238,2
1283,7
1320,6
796,8
224,0
53,1
1450,1
1333,5
2267,1
1435,0
1333,5
1382,5
1422,2
858,1
224,0
54,5
1529,4
1406,4
2391,2
1513,5
1406,4
1458,1
1500,0
905,0
224,0
57,5
1712,9
1575,2
2678,1
1695,1
1575,2
1633,2
1680,0
1013,6
224,0
60,0
1869,6
1719,3
2923,2
1850,2
1719,3
1782,5
1833,7
1106,4
224,0
64,2
2148,4
1975,6
3359,0
2126,1
1975,6
2048,3
2107,1
1271,3
224,0
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar