MASS-VIEW
High-Tech replacement for VA meters
General
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The new MASS-VIEW® flow meter series are a digital alternative
to the conventional VA meters (variable area meters) or rotameters. The
MASS-VIEW® flow meter series incorporates a digital bar graph
of actual gas flow, which is, thanks to the OLED (organic light emitting
diode) technology, clearly visible from all angles, as well as indicating
flow units, gas type and totalised figures. Also available with an optional
in-built needle valve for flow control duties, it is designed to mimic
the straightforward features and vertical format of the VA meter, but with
the considerable added benefits of an electronic output signal, high measuring
accuracy, virtual independence from gas temperature and pressure variations,
freedom from parallax error and inherently safe construction, by eliminating
fragile glass components in the flow path.
The MASS-VIEW® series operates on the principle of direct
thermal mass flow measurement, for gas flow ranges from:
lowest range 0-0,2 ln/min
up to highest range 0-200 ln/min*
* ln/min equals SLM at 0°C and 1 atm(STP)
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It offers a standard accuracy rating of ± 2%RD if the flow is higher
than 50% of it’s maximum full scale and ±(1%RD + 0.5%FS) on lower flows, handling
pressures up to 10 barg (150 psi). Power consumption is low and mechanical
process connections are fitted for straightforward VA meter replacement.
The MASS-VIEW® incorporates the latest OLED technology, which
gives a brighter readout than LCDs, can be viewed from virtually any angle
and has fast signal response times. Alarm settings and the selection of
a pre-installed gas or pre-set range are accessed via a user-friendly menu,
using a 4-way navigation button mounted on the front plate. An analog output
signal enables data logging against various parameters and full accountability
of gas flow, such as for shared ring main applications.
Features
- Clear indication in:- actual flow rate (bar graph and value)
- desired flow units
- type of gas
- totalized flow
- Bright, wide-angle OLED display
- Free of parallax errors
- Virtually independent of pressure and temperature variations
- Low pressure drop
- Wide flow ranges
- Fast response
- High accuracy
Alarm and counter functions (2 alarm contacts available on meters)
Analog (0..5 Vdc) and digital communication (Modbus-RTU/ASCII, RS-232 interface)
- Configurable password protection
10 pre-installed gases available (Air, N2, O2, Ar, CO, CO2, CH4, C3H8,
C4H10, N2O) or H2 or He
- 4 selectable ranges (100%, 50%, 25% and 10% of maximum full scale range)
- Digitally calibrated
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