7.2. MFC Type 8710, MFM Type 8700

MFC Type 8710 and MFM Type 8700 use the classical bypass measuringmethod. This indirect measuring method offers the advantage that the measuring resistors are not in direct contact with the medium and there- fore can also be used to measure and control aggressive gases. Typical applications include Main technical data: Process engineering Full scale range 0.05 –30 l
N /min (N Packaging and food industries
2 at 273,15K and 1013.25 mbar)
Figure 16: MFC 8710, MFM 8700 Environmental engineering Settling time approx. 3 seconds Surface treatment Accuracy ±1.0% of rate ±0.3% F.S. Material coating Repeatability ±0.2% F.S. Characteristics: Linearity ±0.25% F.S. High level of accuracy Span 1:50 Excellent span Max. operating pressure 10 bar depending on the application Calibration of critical gases with air and conversion factor Type of protection IP 50 Optional calibration for two gases Port connection G1/4, NPT1/4,screw-in connector Integrated totalizer Mass Flow Communicator (PC configuration software) Analog signal transmission or digital communication (RS-232, RS-485, field bus) Voltage supply 24 V DC 2 binary inputs and 1 binary output (relay output) Power consumption max. 7.5 W Dimensions 80 x 109 x 25 mm Stainless steel body
15-pin socket Internal External Serial interface (RS-232) Set-point value (analog)* and binary inputs 1-2 Voltage supply Mass flow controller (MFC)Mass flow meter (MFM) Input Digital communicationI/O Output Actual value (analog)Binary output 1 (NC or NO) Sensor signal PWM signal* (valve actuation) LED-Display 1-3 Figure 17: Electrical interfaces type 8710/8700 (* Not with MFM)