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8702 Mass Flow Meter
Brand: Burkert Fluid Control Systems
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 tem perature 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 8702 uses a sensor on silicon chip basis located directly in the bypass channel. Due to the fact that the sensor is directly in the bypass channel a very fast response time of the MFM is reached.
The actual flow is given as an Analog output signal or could be read out over fieldbus communication. Type 8702 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. The MassFlowCommunicator software can be used for parameterisation and diagnosis.
Specifications
Accuracy
- After 1 Minute Warm-Up Time: ± 0.3% of Full Scale
- After 1 Minute Warm-Up Time: ± 0.8% of Reading
Ambient Temperature Range
- -10° to 50° C (14° to 122° F)
Applications
- Biotechnology
- Environmental Technology
- Gas Flow Measurement
- Packaging & FoodStuff Industry
- Pharmaceutical
- Test Bench Equipment
Approvals & Certifications
- CE
BSP Connection
- G 1/4" Female
Communication
- DeviceNet Bus
- Digital
- Fieldbus, CANopen
- Modbus RTU
- Profibus DP
- RS-232
- RS-422
- RS-485
- USB
Consumption
- Power Consumption: 2.5 W (Analog Communicator)
- Power Consumption: 5 W (Digital Communicator)
Electrical Connectors
- D-Sub 15-Pin Connector
- PROFIBUS-DP, DeviceNet & CANopen: D-Sub 9-Pin Connector
- PROFIBUS-DP, DeviceNet & CANopen: Socket M12 Plug, 5-Pin (for IP65)
- Socket M16, 8-Pin Round Connector
Electrical Contacts
- Normally Closed
- Normally Open
Enclosure, Body Material
- Polycarbonate
- Stainless Steel
Environmental Protection
- Typical of Protection: IP65
Flow Rate
- Nominal Flow Range: 0.01 to 80 LPM
Indication
- LED Indication for Power, Communication, Limit & Error
Media
- Air
- Neutral Gasses
Mounting Position
- Horizontal
- Vertical
NPT Connection
- 1/4" NPT Female
Operating Pressure
- Maximum
Operating Voltages
- 24 Vdc
Output
- 0-10 V
- 0-20 mA
- 0-5 V
- 4-20 mA
- Maximum
Output Load
- Maximum
Principle of Operation
- Thermal, Calorimetric
Process Temperature
- -10° to 60° C (14° to 140° F) with Oxygen
- Gas: -10° to 70° C (14° to 158° F)
Relay Output
- Two Relay Outputs: 1 A at 60 V, 60 VA
Repeatability
- ± 0.1% of Full Scale
Response Time
- Settling Time (t95%): < 300 milliseconds
Seat / Seal Material
- Seal: EPDM
- Seal: FKM
Sensor Circuit
- Residual Ripple: < 2%
Tolerance
- Voltage: ± 10%
Turndown
- 1:50
