FMA1700/1800美國OMEGA氣體質量流量計，The FMA1700/1800 Series electronic gas mass flowmeters，經濟型流量計，應用于潔凈氣體，顯示屏可選。無溫度壓力補償，鋁或316SS材質可選，量程：0-1000SLM可選。

FMA1700/1800美國OMEGA氣體質量流量計產品特點：
Mass Flow meters With or Without Integral Display
? Reads Gas Mass Flow Without Temperature or Pressure Compensation
? Flow ranges specified are for nitrogen or air at 20 psig
? Available in Economical Aluminum or Corrosion-Resistant 316 SS
? Tiltable LCD Display for Easy Reading
? NIST Traceable Calibration
 
The FMA1700/1800 Series electronic gas mass flowmeters 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 FMA1700/1800 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 316SS construction for applications requiring more corrosion resistance. The FMA1700 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 FMA1800 series has both an integral 3? digit display and analog output. The display is tiltable over 90° 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 temperature and pressure, the FMA1700/1800 Series are ideal substitutes for many rotameter applications. When used with the FMA178BP portable battery pack, the FMA1800 Series are ideal for in-the-field calibration of flowmeters 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 flowmeter can operate in excess of 40 hours; the batteries can be recharged at least 200 times.

The FMA1700/1800 Series require 12 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 externally accessible 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 FMA1800 Series is connected to the lower electronics via a modular plug. The LCD can be remotely located by purchasing an FMA18RC remote cable assembly-you must then build your own assembly for panel mounting the LCD.

Flow ranges specified are for nitrogen or air at 20 psig. When used for other gases, a multiplication factor is used to determine the flow rate, and the digital display must be rescaled in the field. Or request a custom calibration by adding the gas and pressures as a suffix to the model number. All calibrations done at ambient (20C/70F) temperature only. Questions? Please contact Omega Flow Engineering!

FMA1700/1800美國OMEGA氣體質量流量計技術參數：
Accuracy: ±1.5% of full scale, including linearity over 15 to 25°C and 5 to 60 psia (0.35 to 4.2 kg/cm2);± 3% of full scale, including linearity over 0 to 50°C and 1 to 500 psia (0.07 to 10 kg/cm2) and for units ≥100 SLM from 0 to 20% of range.
Repeatability: ±0.5% of full scale
Temp 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	10	20	30	50	60	80	100	200	500	1000
inH2O	1	14	34	90	129	168	227	112	140	252

Response Time: 800 msec time constant; 2 seconds (typical) to within ±2% of set flow rate over 25 to 100% of full scale
Max Gas Pressure: 500 psig (35 kg/cm2 gauge); 20 psig optimum
Gas and Ambient Temp: 0 to 50°C (0 to 122°F)
Leak Integrity: 1 x 10-7 std cc/sec of helium max. to outside environment
Materials in Fluid Contact:
   Aluminum Models: Anodized aluminum, 316 SS, brass and FKM O-rings
   Stainless Steel Models: 316 SS and FKM O-rings
Output Signal
   Linear 0 to 5 Vdc: 1000 Ω min load;
   4 to 20 mA: 50 to 250 Ω loop resistance
Transducer Power: 12 Vdc @ 200 mA max.
Shipping Weight: 1.1 kg (2.5 lb)
Compliance: EN55011 class 1, class B; EN50082-1 Δ

FMA1700/1800美國OMEGA氣體質量流量計選型指南：

型   號 Al/Br機身 帶顯示屏		型   號 SS機身 帶顯示	型   號  Al/Br機身 不帶顯示屏	型  號 SS機身 不帶顯示	*大流量
FMA1802	FMA1802ST		FMA1702	FMA1702ST	10SCCM
FMA1804	FMA1804ST		FMA1704	FMA1704ST	20SCCM
FMA1806	FMA1806ST		FMA1706	FMA1706ST	50SCCM
FMA1808	FMA1808ST		FMA1708	FMA1708ST	100SCCM
FMA1810	FMA1810ST		FMA1710	FMA1710ST	200SCCM
FMA1812	FMA1812ST		FMA1712	FMA1712ST	500SCCM
FMA1814	FMA1814ST		FMA1714	FMA1714ST	1SLM
FMA1816	FMA1816ST		FMA1716	FMA1716ST	2SLM
FMA1818	FMA1818ST		FMA1718	FMA1718ST	5SLM
FMA1820	FMA1820ST		FMA1720	FMA1720ST	10SLM
FMA1823	FMA1823ST		FMA1723	FMA1723ST	15SLM
FMA1824	FMA1824ST		FMA1724	FMA1724ST	20SLM
FMA1826	FMA1826ST		FMA1726	FMA1726ST	30SLM
FMA1827	FMA1827ST		FMA1727	FMA1727ST	40SLM
FMA1828	FMA1828ST		FMA1728	FMA1728ST	50SLM
FMA1840	FMA1840ST		FMA1740	FMA1740ST	60SLM
FMA1841	FMA1841ST		FMA1741	FMA1741ST	80SLM
FMA1842	FMA1842ST		FMA1742	FMA1742ST	100SLM
FMA1843	FMA1843ST		FMA1743	FMA1743ST	200SLM
FMA1844	FMA1844ST		FMA1744	FMA1744ST	500SLM
FMA1845	FMA1845ST		FMA1745	FMA1745ST	1000SLM