The GAS-VIEW FAQ page displays all frequently asked questions to us and displays the answers.
GAS-VIEW
What happens with the counter values when there is no powersupply?
The flowmeter saves all the parameters in the built-in nonvolatile memory (EEPROM).
Backup processing will be performed, if circuit voltage falls and it is less than a steady value by the battery’s having died or having intercepted the external power supply.
Therefore, when a power supply is recovered, the parameters (when the power was turned off) are reproduced.
IP Rating and NEMA Rating
| The IP Rating (Ingress Protection Rating) of an instrument consists of the letters IP followed by two digits and an optional letter. As defined in international standard IEC 60529, it classifies the degrees of protection provided against the intrusion of solid objects including body parts like hands and fingers, dust, and accidental contact (the first digit after IP), and water (the second digit after IP) in electrical enclosures. |  |
| The National Electrical Manufacturers Association (NEMA) in the United States also publishes protection ratings for enclosures similar to the IP rating system published by the International Electrotechnical Commission (IEC). NEMA however also dictates other product features not addressed by IP codes, such as corrosion resistance, gasket aging, and construction practices. |  |
| For this reason while it is possible to map IP Codes to NEMA ratings that satisfy or exceed the IP Code criteria, it is not possible to map NEMA ratings to IP codes, as the IP Code does not mandate the additional requirements. |  |
What is the maximum flow capacity for different GAS-VIEW models?
This table shows the maximum flow capacities for different GAS-VIEW models in several flow units. Please note, these capacities are all shown for Air. Use Fluidat on the Net to calculate to other flow units.
Nominal Bore size |
Max. Flow |
Max. Flow in other units (Air equivalent) |
| 4 mm | 17 l/min |
|
| 8 mm | 90 l/min |
|
| 15 mm | 283 l/min |
|
| 25 mm | 850 l/min |
|
What is Aeration?
Aeration is a process which circulates mixes or dissolves air (or other gases) in a liquid or other substance. 
Industrial sectors:
• Ice Cream / Whipped Cream
• Beverage
• Soil
• Waste Water Treatment
• Fermentation
• Fish or algae farms
Application requirements:
• High repeatability
• Robustness
• Dirt resistivity
• Easy to check actual flow
• Gas totalization
What happens during measurement with a vortex meter when the tube vibrates ?
In general, vortex meters are sensible for vibrations and impact shocks. Therefore vibrations and impact shocks should be prevented in the neighbourhood of the meter.
What kind of output pulse is generated from the vortex meter?
| The output pulse is of the “open collector” type.
Instead of outputting a signal of a specific voltage or current, the output signal is applied to the base of an internal NPN transistor whose collector is externalized (open) and available on the wire. The emitter of the transistor is connected internally to the ground pin.If we supply for instance 24Vdc to the pulse line and we keep the maximum current to 20mA, then we need a “pull-up” resistor of 24(VDC) / 20 (mA) = 1.2 (k Ohm) Note: if the readout unit is a NPN Open collector receiver, there is no need for a pull-up resistor. |
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Vortex technology, how does it work?
A Kármán vortex street is a term for a repeating pattern of swirling vortices caused by the unsteady separation of flow of a fluid over bluff bodies. It is named after the engineer and fluid dynamicist, Theodore von Kármán.
Can GAS-VIEW meters be used at vacuum conditions?
No, our vortex meters will not work in vacuum.
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