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Instruments decription 

 
VA 525 EN V1.01 

 

Page 5 of 41 

1  Intended use 

The VA 525 consumption sensor is used for continuous flow measurements. 

 

The VA 525 consumption sensor 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 525 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. 

 

2

 

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 525 which you would 
like to dispose of. 

Qualified employees from the measurement and control technology branch should only carry 
out adjustments and calibrations. 

 

Summary of Contents for VA 525

Page 1: ...VA 525 EN V1 01 Page 1 of 41 EN English Instruction manual VA 525 Compact inline flow sensor with integrated flow straightener...

Page 2: ...unctioning of the VA 525 are only guaranteed in case of careful observation of the described instructions and notes Sales Office South Gesch ftsstelle S d Zindelsteiner Str 15 D 78052 VS Tannheim Tel...

Page 3: ...Technical data 7 5 Scaling Analogue output Comprssed Air 8 6 Installation Description 9 6 1 Installation of VA 525 9 7 Flow measuring ranges 10 7 1 Flow for different gases 10 8 Dimensions 11 9 Electr...

Page 4: ...settings 25 10 3 2 1 Modbus RTU Setup 25 10 3 3 Ethernet Modbus TCP 26 10 3 3 1 1 Network Setup DHCP 26 10 3 3 2 Network Settings static IP 27 10 3 3 3 Modbus TCP Settings 28 10 3 3 4 Modbus Settings...

Page 5: ...y the material data of the gas component are decisive 2 Safety instructions Please read carefully before starting the device Warning Do not exceed the pressure range of 16 bar Observe the measuring ra...

Page 6: ...in existing pipelines due to integrated measuring block Sizes 1 1 1 and 2 Integrated flow straighteners no inlet runs necessary Integrated display with presentation of 2 values Flow Consumption Speed...

Page 7: ...80 C probe tube 20 70 C housing Operating pressure up to 16 bar Power supply 18 to 36 VDC Power consumption max 5W Digital output RS 485 Modbus RTU MBus optinal Ethernet oder Ethernet PoE optional Ana...

Page 8: ...Speed 0 110 m h VA 525 with integrated measuring block Low Speed 4 20 mA 0 45 m h Standard 0 85 m h Max 0 175 m h High Speed 0 215 m h VA 525 with integrated 1 measuring block Low Speed 4 20 mA 0 75...

Page 9: ...allation Description 6 1 Installation of VA 525 The sensor VA 525 is pre supplied with the measuring block An installation at customer site is only allowed in the unpressurized state of the system Tig...

Page 10: ...Low Speed 45 35 75 120 220 305 505 Standard 85 70 135 230 415 570 935 Max 170 140 275 460 830 1140 1870 High Speed 205 170 335 555 1005 1385 2265 Carbon dioxide CO2 Low Speed 25 20 45 75 140 195 320...

Page 11: ...idth Connection thread L mm B mm H1 mm H mm A mm DN 8 G 1 4 135 55 50 109 1 15 DN 15 G 1 2 135 55 50 109 1 20 DN 20 G 3 4 135 55 50 109 1 20 DN 25 G 1 135 55 50 109 1 25 DN 32 G1 1 4 135 80 80 139 1 2...

Page 12: ...53 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 vol...

Page 13: ...hable 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 i...

Page 14: ...1 page 14 o 41 9 2 4 Ethernet optional PoE Connector plug B Connection cable M12 x coded 8 pole M12 x coded to RJ45 Data LINES 1 2 und 3 4 PoE LINES 5 6 und 7 8 2 8 1 3 5 4 6 7 M12 x 1 Connection cabl...

Page 15: ...Operation VA 525 EN V1 01 Page 15 of 41 10 Operation Remark Only for version with display The operation of the VA 525 is done by the two capacitive key buttons Up and Enter Up OK...

Page 16: ...Gas Status in fo SW Version Mo dbus ID Switching to pages 2 5 or back by pressing key Available only with option Pressure AV Time Period for average value calculation could be changed under Sensor Se...

Page 17: ...otected 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 Menu items...

Page 18: ...tings Sensor Setup 10 3 1 1 Input change tube diameter For the VA 525 not adjustable suspended as voted on included measuring section with corresponding measurement block diameter For changes first se...

Page 19: ...nter 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 Confir...

Page 20: ...erature and reference pressure are 20 C 1000 hPa All volume flow values m h and consumption values indicated in the display are related to 20 C and 1000 hPa according to ISO 1217 intake condition Alte...

Page 21: ...sing 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 activat...

Page 22: ...Ref Settings Filtertime Setup Sensor Setup Advanced Ref Settings AV Time Under item Filtertime an attenuation can be defined Input values of 0 10000 in ms are possible The time period for averaging c...

Page 23: ...o point calibration is carried out In case there is already a calibration done it is indicated in menu with calibrated Leave menu with button Back With the low flow cut off activated the flow below th...

Page 24: ...e If necessary a pressure correction can be made by selecting Set pressure to Select the menu item with the key and then select it with the OK key Enter the corresponding pressure value in the input m...

Page 25: ...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 plugg...

Page 26: ...fication and description of the Modbus protocol is free to download on www modbus org Supported Modbus commands functions Command Code Description Function Code 3 Read holding register Function code 1...

Page 27: ...ubnet and Gateway selection keys must be selected and activated with OK The first data field of the selection in this case the IP address is then marked red Confirm with OK the corresponding input men...

Page 28: ...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 Input for the port is done analogue By means of the b...

Page 29: ...AB Middle Endian 10 3 3 5 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 m h R 1109 1108 4 Float...

Page 30: ...on 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 Velo...

Page 31: ...put 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 Nm s m s Nm h m h Nltr h ltr h N...

Page 32: ...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 C...

Page 33: ...ightness 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 informa...

Page 34: ...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...

Page 35: ...ed 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 condit...

Page 36: ...Info Settings Info Run Time 2d 21h 23m 12s Vin 23 8V Temp 35 8 92 7 m s 600m 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...

Page 37: ...Value 1 with Unit Consumption m Value 2 with Unit Flow m h Consumption m Value 3 with Unit Gas temperature C All Values could be changed preset in production or with CS Service software Order No 0554...

Page 38: ...ext recalibration is recommended is internally entered When this date is reached a message appears in the display with the status message CAL Note The measurement will continue without interruption or...

Page 39: ...rror the sensor has an internal read error on e g EEProm AD converter etc detected I Temp out of Range At media temperatures outside the specified temperature range the status message Temp out of Rang...

Page 40: ...r the instrument VA 525 On request and additional payment calibration certificates could be issued The precision is given due to use DKD certified flow meters and verifiable 17 Warranty If you have re...

Page 41: ...components comply with requirements of the following EU directives Elektromagnetische Vertr glichkeit Electromagntic compatibility 2014 30 EU 2014 30 EC RoHS Restriction of certain Hazardous Substance...

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