Safety instructions
VA 520 Bi directional English V1.21
Page 6 of 45
3 Safety instructions
Read this manual carefully before installing the VA 520. If the instructions
given in this manual, in particular the safety instructions, are not observed,
this may result in hazards for people, equipment and plants
Please read carefully before starting the device!
Warning: Do not exceed the pressure range of 16 bar!
Observe the measuring range of 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.
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.
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