Bypass Mass Flow Meter (MFM) for gases

8700 Bypass Mass Flow Meter (MFM) for gases • Bypass MFM with Capillary technology for nominal flow rates from 5 mlN/min to 1 lN/min Type 8700 stand...
Author: Hilary Tyler
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8700

Bypass Mass Flow Meter (MFM) for gases

• Bypass MFM with Capillary technology for nominal flow rates from 5 mlN/min to 1 lN/min Type 8700 standard version

• Suitable for aggressive gases • Fieldbus option

Type 8700 sub-base version

Type 8700 can be combined with...

Type 1150

Type 0330

Type 6013

MFC

Multi-channel programme controller

3/2 or 2/2way valve

2/2-way valve

Configuration software

Mass flow meters are used in Process Technology for the direct measurement of the mass flow of gases. In case of volumetric flow meters, it is necessary to measure the temperature and the pressure either the density, because gases change their density or rather their volume depending on the pressure. The measurement of the mass flow, on the other hand, is independent of the pressure and the temperature. The digital mass flow meter Type 8700 uses a classic bypass sensor (see the description on page 2). The actual flow is given as an analog output signal or could be read out over RS-communication, also fieldbus devices are available. Type 8700 can optionally be calibrated for two different gases, the

user is able to switch between these two gases. The materials of the parts that come into contact with the medium are selected according to customer specification so that the unit can be operated with the complete range of standard process gases. Typical application areas are gas flow measurement in • Test benches • Environmental technology • Medical technology and • Analysis technology

Technical data Full scale ranges1) (Qnom) Operating media Max. operating pressure (inlet pressure) Calibration medium Medium temperature Ambient temperature Accuracy (after 30 min. warm up time) Linearity Repeatability Control range Settling time (t95%) Body material Electr. housing material Sealing material Port connections Electr. connection

1)

5 to 1000 mlN/min N2 equivalent neutral, non-contaminated gases, other gases on request 10 bar (145 psi) operating gas or air with conversion factor -10 to +70°C -10 to +50°C ±1.5% of Rdg. ±0.3% F.S. ±1% F.S. ±0.5% F.S. 1:50