Economical Gas Mass Flow meters For Clean Gases with Optional Integral Display FMA1828A, shown smaller than actual size. U eads Gas Mass Flow R Without Temperature or Pressure Compensation A U vailable in Economical Aluminum or CorrosionResistant 316 SS U iltable LCD Display T for Easy Reading N U IST Traceable temperature and pressure, the Calibration Included FMA1700A/1800A Series are ideal The FMA1700A/1800A Series eletronic gas mass flow meters provide for monitoring the flow of a wide variety of gases from 10 SCCM up to 1000 SLM. Utilizing heat transfer through a heated tube to measure molecular gas flow rate, the FMA1700A/1800A provides measurement of direct gas mass flow rate, without the need to compensate for variations in gas temperature or pressure (within stated limits). They are available in an economical aluminum/brass construction for typical gas flows and a 316 SS construction for applications requiring more corrosion resistance. The FMA1700A series without integral display is supplied with a field selectable analog 0 to 5 Vdc or 4 to 20 mA output for remote monitoring; the FMA1800A series has both an integral 3¹⁄₂ digit display and analog output. The display is tiltable over 90 degrees for viewing convenience. The display is calibrated standard to read out directly in SCCM or SLM for nitrogen (other gas calibrations available on special order). Due to their low cost, digital display, analog output capability, and insensitivity to variations in gas substitutes for many variable area flow meter applications. When used with the FMA178BP portable battery pack, the FMA1800A Series are ideal for in-the-field calibration of flow meters or testing of air sampling equipment. The FMA178BP battery pack includes batteries, recharger, and carrying case with shoulder strap and belt loop. With the FMA178BP, the flow meter can operate in excess of 40 hours; the batteries can be recharged at least 200 times. The FMA1700A/1800A Series require 12 to 26 Vdc power @ 200 mA maximum, which can be supplied by the FMA178PW plug-in socket power supply. The electronics are reverse polarity protected and has externallyaccessible fusing. Model number FMA178C (supplied separately) provides a mating 9-pin “D” connector with 3 feet of ribbon cable for accessing the 0 to 5 Vdc output signal and power input connections (use FMA178C-MA for 4 to 20 mA output signal connection). The LCD supplied with the FMA1800A Series is connected to the lower electronics via a modular plug. The LCD can be remotely located by purchasing an FMA18RC remote cable assemblyyou must then build your own assembly for panel mounting the LCD. D-11 Accuracy: ±1% of full scale, including linearity over 15 to 25°C and 5 to 60 2) psia (0.35 to 4.2 kg/cm Repeatability: ±0.5% of full scale and for units ≥100 scm from 0 to 20% of range Temperature Coefficient: 0.15% of full scale per °C or better Pressure Coefficient: 0.01% of full scale per psi (0.07 bar) Maximum Pressure Drop: SLM in. W.C. SLM in W.C. 10 1 80 168 20 14 100 227 30 34 200 112 50 90 500 140 60 129 1000 252 Response Time: 800 msec time constant; 2 seconds (typical) to within ±2% of set flow rate over 25 to 100% of full scale Maximum Gas Pressure: 500 psig (35 kg/cm2 gage);1000 psig (70 kg/cm2 gage) for ranges up to 100 SLM; 20 psig optimum Gas and Ambient Temperature: 0 to 50°C (0 to 122°F) Leak Integrity: 1 x 10- std cc/sec of helium maximum to outside environment Ma erials in Fluid Contact: t Aluminum models: Anodized aluminum, 316 SS, brass and

Dimensions: cm (inch) Stainless Steel models: 316 SS and FKM O-rings Output Signal Linear 0 to 5 Vdc: 1000 Ω minimum load 4 to 20 mA: 50 to 250 Ω loop resistance Transducer Power: 12 Vdc @ 200 mA maximum Shipping Weight: 1.1 kg (2.5 lb) Compliance: EN55011 class 1, class B; EN50082-1 ConnectionCompression Fitting Unit Maximum Flow Rate Lay Length with Fittings Maximum Height Maximum Width Maximum Flow Rate 10 sccm 20 sccm 50 sccm 100 sccm 200 sccm 500 sccm 1 SLM 2 SLM 5 SLM 10 SLM 15 SLM 20 SLM 30 SLM 40 SLM 50 SLM 60 SLM 80 SLM 100 SLM 200 SLM 500 SLM 1000 SLM* ** Insert range code, see table...