Dwyer GFM3 Series Gas Mass Flow Meter and Controllers

Wiratama Mitra Abadi 01 18.17 flow measurement,

Dwyer GFM3 Series Gas Mass Flow Meter and Controllers is an ideal choice for the measurement of flow rates of a wide variety of gases. This digital flow meter features a 12-digit totalizer for total gas volume indication, and is available in the choice of 0 to 5 VDC, 0 to 10 VDC, or 4 to 20 mA output signals.

Standard LCD and four-button keypad allow easy access to the many features of the GFM3. The digital interface operates through available RS-485 or RS-232, providing access to internal data parameters and multi-drop capability of up to 255 units (RS-485 only).

Set alarms remotely via the digital interface for flow to alert users of high or low thresholds being exceeded. With a high ±1% FS accuracy and ±0.25% FS repeatability, the GFM3 is the optimal choice in gas flow metering and monitoring.

The GFM3 comes with a NIST traceable certificate. Flow Monitoring, Push-Button Configuration. The unit can be calibrated for a variety of gases via push-button with 0-5 VDC, 0-10 VDC or 4-20 mA and relay outputs.

Dwyer GFM3 Series Features

Multi-drop capability of up to 256 units (for RS-485 option).
Programmable 12 digit totalizer indicates total gas volume.
Four button keypad and large 128x64 graphical LCD with backlight.
Internal conversion factors for up to 32 gases.
Automatic zero adjustment.
Self diagnostic tests.
Free communication software available for download at www.dwyer-inst.com.
Set alarms remotely via digital interface for flow to alert user of high or low thresholds being exceeded.
NIST traceable certificate included.

Application

Gas Monitoring
Operating Pumps and Valves
Process Equipment
Vacuum Processes
Glass and Metal Coating
Film Deposition

Dwyer GFM3 Series Specification

Service	Clean gases compatible with wetted parts.
Wetted Materials	316 SS, 416 SS; Fluoroelastomer, Buna-N, EPR or PTFE O-rings.
Accuracy	±1% FS.
Repeatability	±0.25% FS.
Response Time	0.6 to 1.0 s to within ±2% of setpoint over 20 to 100% FS.
Output Signal	Output Signal: Linear 0 to 5 VDC (3000 Ω min. load impedance); 0 to 10 VDC (6000 Ω min. load impedance); 4 to 20 mA (500 Ω max. loop resistance).
Relay Rating	1 amp @ 24 VDC.
Max. Particulate Size	5 microns.
Temperature Limits	Ambient: 32 to 122°F (0 to 50°C); Dry Gases: 14 to 122°F (-10 to 50°C).
Power Supply	12 VDC; 15 VDC; ±24 VDC.
Process Connections	1/8" compression fitting for flow rates ≤ 10 L/min; 1/4" for ≤ 50 L/min; 3/8" for ≤ 100 L/min.
Pressure Limits	500 psia (35 bar).
Leak Integrity	1 x 10-9 smL/sec of helium.
Display	128 x 64 graphic LCD with backlight.
Weight	1 lb (.45 kg).