CS Instruments VA 520 User manual

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

Foreword

VA 520 EN V1.13 page 2o 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: [email protected]

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: [email protected]

Web: http://www.cs-instruments.com

Table of Content

VA 520 English V1.13 Page 3 of 32

II. Table of Contents

I. Foreword ..........................................................................................................................2

II. Table of Contents.........................................................................................................3

1Safety instructions ..........................................................................................................5

2Instruments description..................................................................................................6

3Technical data..................................................................................................................7

4Installation Description...................................................................................................8

4.1Pipe/tube requirements......................................................................................................... 8

4.2 Inlet / outlet runs.................................................................................................................... 8

4.2.1 Installation of VA 520........................................................................................................ 9

4.3 Displayhead Position............................................................................................................. 9

5Flow measuring ranges.................................................................................................10

5.1 Flow air.................................................................................................................................. 10

5.2 Flow for different gases....................................................................................................... 10

6Dimensions ....................................................................................................................11

6.1 With measurement section and screw-in thread.............................................................. 11

6.2 With measurement section and flange (Material stainless steel 1.4404):...................... 12

7Electrical wiring .............................................................................................................13

7.1 Electrical wiring.................................................................................................................... 13

Table of Content

VA 520 EN V1.13 page 4o 32

8Operation........................................................................................................................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

9Maintenance...................................................................................................................31

10 Cleaning of the sensor head .....................................................................................31

11 Re-Calibration.............................................................................................................31

12 Spare parts and repair ...............................................................................................31

13 Calibration...................................................................................................................31

14 Warranty......................................................................................................................31

Safety instructions

VA 520 English V1.13 Page 5 of 32

1Safety 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.

Instruments decription

VA 520 English V1.13 Page 6 of 32

2Instruments 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

Technical data

VA 520 English V1.13 Page 7 of 32

3Technical 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

Installation

VA 520 EN V1.13 page 8o 32

4Installation 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.

Installation

VA 520 EN V1.13 page 9o 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.

Measuring ranges

VA 520 English V1.13 Page 10 of 32

5Flow measuring ranges

5.1 Flow air

Pipe size

Inner pipe

Pipe size

VA 520

Consumption

Inch

Meas. ranges from … to

Standard setting

1/4“

8,5

DN 8

0,8…90 l/min

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 ¼"

1 ½"

2 ½"

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]

Reference DIN1945/ ISO 1217: 20°C, 1000 mbar (Reference during calibration)

Air

170

290

530

730

1195

2050

2840

Adjustment to DIN 1343: 0°C, 1013,25 mbar

Air

82,76

156,33

266,68

487,38

671,29

1098,91

1885,16

2676,01

Argon

140

275

460

830

1140

1870

3205

4440

Carbon dioxide

CO2

175

290

525

720

1185

2030

2810

Nitrogen

155

260

485

650

1060

1820

2610

Oxygen

165

280

505

695

1140

1955

2710

Nitrous oxide

N2O

170

285

520

715

1170

2010

2785

Natural gas

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.

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