Dwyer DMF Series Digital Mass Flow Meter and Controller an auto tune function to optimize control response for a specific gas under actual process conditions. Self-diagnostic tests are run at power-up to ensure the controller is in optimum working condition. Calibration information for up to 10 gases and conversion factors for up to 256 different gases are stored in memory. High and low gas flow alarm limits are programmed via the RS-485 interface. The software supports programmable flow modes, allowing the execution of custom programming of up to ten steps.
Program, record, analyze, and control flow rates of various gases with Series DMF Digital Mass Flow Controller. Controllers are designed with straight tube sensors with restrictor flow elements to ensure laminar gas flow for accurate and repeatable results. Series DMF is unaffected by temperature and pressure variations.
Controllers can be programmed for various control functions including flow set point, totalizer, stop totalizer, totalize from preset flow, stop and preset total, auto-zero, and more. Auto zero feature utilizes an automatic balancing circuit that virtually eliminates drift of zero and span. In addition, Series DMF controllers have two dry contact closures to operate pumps, valves, or other process equipment.
Dwyer DMF Series Features
- High and low gas flow alarm limits are programmed via the RS-485 interface
- Calibration information for up to 10 gases and conversion factors for up to 256 different gases are stored in memory
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Specification
| Service | Clean gases compatible with wetted parts. |
| Wetted Materials | 316 SS, 416 SS, fluoroelastomer o-rings. |
| Accuracy | ±1% FS including linearity between 59 to 77°F (15 to 25°C) and 10 to 60 psia (0.7 to 4 bar); ±2% FS from 32 to 122°F (0 to 50°C) and 5 to 150 psia (0.3 to 10 bar). |
| Repeatability | ±0.15% of full scale. |
| Output | Linear 0-5 VDC (2000 Ω min. load impedance); 0-10 VDC (4000 Ω min. load impedance). |
| Maximum Particulate Size | 100 microns. |
| Temperature Limits | 41 to 122°F (5 to 50°C). |
| Power Supply | ±15 VDC; 13.5 watts maximum. |
| Process Connections | 1/4″ compression fitting for flow rates ≤50 L/m; 3/8″ for flows ≥60 L/m. |
| Pressure Limits | 500 psig (34.5 bar). |
| Leak Integrity | 1 x 10-9 sccs of Helium. |
| Computer Interface | RS-485. |
| Agency Approvals | CE. |
Download Data Sheet: Series DMF Digital Mass Flow Meter and Controller
Ref: dwyer-inst.com