Principle Of Flow Measurement; Special Functions; Communication Interfaces; Physical Data - IMT Analytics FlowMeter F1 User Manual

Specifications
4.2 Principle of flow
measurement
4
4.3

Special functions

4.4

Communication interfaces

4.5

Physical data

10
Flow in the flow channel is determined by differential pressure measurement. To build
up differencial pressure Δp, a measuring disc is used to provide flow resistance. For
flow rates > 50 L/min the differential pressure Δp2 is used. For lower flows, the Flow-
Meter uses Δp1 to improve the accuracy at lower flow rates.
ƞ: dynamic viscosity of the gas [Pa s]
ρ: gas density [kg/m
]
3
c1, c2: device-specific constants (channel geometry)
Dynamic viscosity
The viscosity of a medium is its resistance to the flow and shear of the current. Vis-
cosity is extremely dependent on temperature. The viscosity of a medium is slightly
dependent on the pressure and moisture content of the medium.
Density
Density is the unit for the mass per unit volume of the medium. Density is very de-
pendent on pressure and temperature.
The impact of ambient conditions is hence the reason why flow is occasionally con-
verted to standard conditions.
(4.8 Gas standards for flow and volume
Automatic battery operation in the event of a power failure.
• USB-A: for data recording and software updates
• USB-C: no communication, used only for charging
• RJ-10 (serial port) to stream measurement values and set up the device
Weight: 350 g
Size (l × w × h): 200 × 80 × 60 mm
Gas types: Air, O , N
2 2
measurement)
and mixtures: Air/O
2
IMT Analytics AG