Product Description
Atmosphere Engineering / UPC-Marathon Flow Controller FM-3988
Part#: FM-3988
- Measurement Technology: Differential Pressure (No Moving Parts in Fluid Path)
- Calibrated Fluid: Liquid Methanol (Nitrogen-Methanol Furnace Atmospheres)
- Flow Range: 0–75 cc/min (cc/M)
- Turndown Ratio: 10:1 (Effective Control Down to ~10–15% of Scale)
- Flow Accuracy: ±4% of Reading / Full Scale (NIST-Traceable 10-Point Calibration)
- Repeatability: 2%
- Max Operating Pressure: 5 psig (Standard Model)
- Operating Temperature: 32°F to 130°F–150°F (0°C to 54°C–65°C) Ambient
- Wetted / Body Materials: Stainless Steel Manifold Block and Compression Tube Fittings
- Power Requirement: 24 VDC Input via DB9 Connector (Pin 1 +24 VDC, Pin 2 COMMOM)
- Setpoint Control Input. Linear 4–20 mA Analog Signal (Pins 5 & 6) or Digital Setpoint Over Serial Comms
- Flow Retransmission Output: Linear 4–20 mA Analog Output Proportional to Measured Flow Rate (Pins 3 & 4)
- Serial Communications: RS-485 Two-Wire Interface (Pins 7 & 8) Running Modbus-RTU protocol
- Alarm Output: Integrated Flow Alarm Relay Output (Pin 9) for High/Low Flow Fault Signaling
