16
V5-02-2010
MAXIMUM VELOCITY OF THE DIFFERENT GASES
[J/kg*K] Luft/Gas
VA 400 Standard
VA 400 Max.
VA 400 HighSpeed
Max. velocity
[m/s]
Max. velocity
[m/s]
Max. velocity
[m/s]
Reference DIN1945/ ISO 1217: 20°C, 1000 mbar (reference at calibration of the sensors)
Air
## ##
92.7
185.0
224.0
Adjustment to DIN 1343: 0°C, 1013.25 mbar
Air
##
##
85.2
170.1
206.0
Argon Ar
## ##
144.9
289.2
350.2
Carbon dioxyde
CO
2
## ##
91.7
183.1
221.6
Nitrogen N
2
## ##
82.4
164.5
199.2
Oxygen O
2
## ##
88.4
176.4
213.6
Nitrous oxide
N
2
O
## ##
90.9
181.4
219.7
Natural gas
NG
## ##
54.8
109.4
132.5
Maximum velocities of VA 400 for different gases and reference standards
Please note:
The consumption sensor VA 400 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.
Summary of Contents for VA 400
Page 27: ...27 V5 02 2010 DECLARATION OF CONFORMITY...
Page 28: ...28 V5 02 2010 DECLARATION OF CONFORMITY...
Page 29: ...29 V5 02 2010 NOTES...
Page 30: ...30 V5 02 2010 NOTES...
Page 31: ...31 V5 02 2010 NOTES...
