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Measuring ranges 

VA 521 English V1.20 

 

Page 11 of 39 

7

 

Flow measuring ranges  

7.1  Flow for different gases 

 

1/2" 

3/4" 

1" 

1 ¼" 

1 ½" 

2" 

Analog 

output 

20mA

 

Analog 

output 

20mA

 

Analog 

output 

20mA

 

Analog 

output 

20mA

 

Analog 

output 

20mA

 

Analog 

output 

20mA

 

[m³/h] 

[m³/h] 

[m³/h] 

[m³/h] 

[m³/h] 

[m³/h] 

Reference DIN1945/ ISO 1217: 20°C, 1000 mbar 

(Reference during calibration)

 

Air 

Low Speed 

20 

45 

75 

140 

195 

320 

Standard 

45 

85 

145 

265 

365 

600 

Max 

90 

175 

290 

530 

730 

1195 

High Speed 

110 

215 

355 

640 

885 

1450 

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

Air 

Low Speed 

20 

40 

70 

130 

180 

295 

Standard 

40 

80 

135 

240 

335 

550 

Max 

80 

160 

270 

485 

670 

1100 

High Speed 

100 

195 

325 

590 

815 

1330 

Argon 
(Ar) 

Low Speed 

35 

75 

120 

220 

305 

505 

Standard 

70 

135 

230 

415 

570 

935 

Max 

140 

275 

460 

830 

1140 

1870 

High Speed 

170 

335 

555 

1005 

1385 

2265 

Carbon dioxide 
(

CO

2

Low Speed 

20 

45 

75 

140 

195 

320 

Standard 

45 

85 

145 

260 

360 

590 

Max 

90 

175 

290 

525 

720 

1185 

High Speed 

105 

210 

350 

635 

875 

1430 

Nitrogen  
(N

2

Low Speed 

20 

40 

70 

130 

180 

295 

Standard 

40 

80 

135 

240 

335 

550 

Max 

80 

160 

270 

485 

670 

1100 

High Speed 

100 

195 

325 

590 

815 

1330 

Oxygen f 
(O

2

Low Speed 

20 

45 

75 

135 

185 

305 

Standard 

40 

80 

140 

250 

345 

570 

Max 

85 

165 

280 

505 

695 

1140 

High Speed 

105 

205 

340 

610 

845 

1380 

Nitrous oxide 
(N

2

O) 

Low Speed 

20 

45 

75 

140 

190 

315 

Standard 

40 

85 

140 

260 

355 

585 

Max 

85 

170 

285 

520 

715 

1170 

High Speed 

105 

210 

345 

630 

865 

1420 

Other gases on request 

 
Please note: 

 
The area outside the pipeline (ambient area of the sensor) must not be an explosive area.

Summary of Contents for VA 521

Page 1: ...VA 521 English V1 20 Page 1 of 39 Instruction manual VA 521 Compact inline flow sensor with integrated flow straightener with Display 4 20 mA and pulse output galv isolated EN English...

Page 2: ...nctioning of the VA 521 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 4...

Page 3: ...ehler Textmarke nicht definiert 5 2 Inlet outlet runs Fehler Textmarke nicht definiert 5 3 Installation of VA 521 Fehler Textmarke nicht definiert 5 4 Displayhead Position 10 6 Flow measuring ranges 1...

Page 4: ...9 3 3 1 Network Setup DHCP 23 9 3 3 2 Network Settings static IP 24 9 3 3 3 Modbus TCP Settings 25 9 3 3 4 Modbus Settings 2001 2005 26 9 3 3 5 Values Register 1001 1500 26 9 3 4 Pulse Alarm 28 9 3 4...

Page 5: ...eration 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 521 w...

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

Page 7: ...andling or operation outside the technical specifications is not permitted Claims of any kind based on improper use are excluded Operating principle The VA 521 consumption probe operates according to...

Page 8: ...ature 30 80 C probe tube 20 70 C housing Operating pressure up to 16 bar special version PN 40 40 bar Power supply 12 to 36 VDC Power consumption max 5W Digital output RS 485 Modbus RTU Analog output...

Page 9: ...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 521 with integrated 1 measuring block Low Speed 4 20 mA 0 75 m h Standard 0 145 m h Max 0 290 m h High Speed 0 355 m h VA...

Page 10: ...torque of 25 30 Nm It has to be checked whether the VA 521 is correctly installed in the measuring section the flow direction arrows must point from the integrated flow straightener away 6 2 Display h...

Page 11: ...Argon Ar Low Speed 35 75 120 220 305 505 Standard 70 135 230 415 570 935 Max 140 275 460 830 1140 1870 High Speed 170 335 555 1005 1385 2265 Carbon dioxide CO2 Low Speed 20 45 75 140 195 320 Standard...

Page 12: ...ize Thread L mm B mm H mm H1 mm A1 mm A mm VA 521 1 2 DN 15 G1 2 135 55 190 65 50 25 20 VA 521 3 4 DN 20 G3 4 135 55 190 65 50 26 20 VA 521 1 DN 25 G1 135 55 190 65 50 33 25 VA 521 1 1 4 DN 32 G1 1 4...

Page 13: ...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 s...

Page 14: ...nection 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 cable Cat 6 Remark VA521 Power Classification acc IEEE 802 3af Clas...

Page 15: ...Operation VA 521 English V1 20 Page 15 of 39 10 Operation Remark Only for version with display Up OK The operation of the VA 521 is done by the two capacitive key buttons Up and Enter...

Page 16: ...g 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 3...

Page 17: ...s 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...

Page 18: ...on 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...

Page 19: ...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 butt...

Page 20: ...rtime 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...

Page 21: ...By pressing the position value is incremented by 1 Confirm the input with OK and activate next number position Leave menu with button Back Men punkt mit Taste anw hlen und anschlie end mit Taste OK au...

Page 22: ...eleased 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...

Page 23: ...ification 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...

Page 24: ...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 25: ...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 26: ...DAB Middle Endian 10 3 2 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 Floa...

Page 27: ...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 28: ...layed 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 chos...

Page 29: ...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 30: ...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 31: ...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 32: ...ribed 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 con...

Page 33: ...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 34: ...e 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 2007...

Page 35: ...e next 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...

Page 36: ...message Internal Error the sensor has an internal read error on e g EEProm AD converter etc detected Temp out of Range At media temperatures outside the specified temperature range the status message...

Page 37: ...for the instrument VA 521 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...

Page 38: ...Notes VA 521 English V1 20 Page 38 of 39...

Page 39: ...CE Conformity VA 521 English V1 20 Page 39 of 39...

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