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MASS-VIEW - Model MV-102 -Direct Thermal Mass Flow Meters (MFMs)
MASS-VIEW model MV-102 Direct Thermal Mass Flow Meters (MFMs) are suited for precise measurement of flow ranges between 20…200 mln/min and 20…2000 mln/min at operating pressures up to 10 bar(g). The MFM has an integrated graphical OLED display, clearly visible at wide angles, which allows reading of actual flow (value and a bar graph), total flow and type of gas. The display features easy set up via a user-friendly menu, using a 4-way navigation push button. The pre-installed gases eliminate the need to recalibrate for different gases and therefore reduce the cost of ownership. Additional features & functions include a variety of alarm and counter functions, an analog output signal, digital interfaces and two relay contacts. The MASS-VIEW series provides modern, novel and economical alternative to variable area meters (VA meters), also known as purge meters. Unlike conventional VA meters these new flow meters measure mass flow instead of volume flow.
Measurement / control system
- Flow range (intermediate ranges available) : min. 20…200 mln/min max. 20…2000 mln/min (based on N2)
- Accuracy (incl. linearity) (based on actual calibration) :
- ± 2% Rd for flow > 50% of max. capacity;
- ± (1% Rd + 0,5% FS) on lower flows
- Repeatability : < 0,2 % FS typical
- Turndown ratio : up to 1 : 100
- Operating pressure : 0…10 bar(g) / 0…150 psi(g)
- Pressure coefficient : ± 0,2% Rd/bar typical at Air
- Pre-installed gases : Air, Ar, N2, O2, CO2, CH4, C3H8, N2O, CO and C4H10
- Standard calibration gas : Air, other gases are converted using our Fluidat® conversion model which will introduce extra inaccuracy
- Response time (sensor) : 2 sec.
- Operating temperature : 0 … 50 °C (32 … 122°F)
- Temperature coefficient : Zero: <0,1% FS/°C, Span: <0,2% Rd/°C
- Leak integrity, outboard : tested < 2 x 10-9 mbar l/s He
- Attitude sensitivity : < 0,1 % FS
Mechanical parts
- Material (wetted parts) : Aluminium
- Test pressure : 21 bar(a) / 300 psi(a)
- Process connections : G 1/4” BSPP female thread
- (compression fittings optional)
- Seals : Viton®
- Weight : 0,7 kg
- Ingress protection : IP40
Electrical properties
- Power supply : +15 … 24 Vdc (+/- 10%)
- Max. power consumption : approx. 135 mA
- Analog output : 0 … 5 Vdc
- Digital communication : RS232 / RS485 (Modbus RTU/ASCII)
- Min. and max. relay contacts : switching current 0,5 A, 24 Vdc, one side grounded (0 Vdc power)
- Electrical connection : 8-pin RJ-45 modular jack
- 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