Omega Products FMA1702 User Manual

ECONOMICAL GAS MASS FLOWMETERS

For Clean Gases With Optional Integral Display

FMA1700/1800 Series

Standard

U Reads Gas Mass Flow

Without Temperature or Pressure Compensation

U Available in Economical

Aluminum or CorrosionResistant 316SS

U Tiltable LCD Display

for Easy Reading

U NIST Traceable Calibration

FMA1700/1800 Series are ideal substitutes for many rotameter

The FMA1700/1800 Series eletronic 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 316 SS 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 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 temperature and pressure, the

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 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 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.

FMA1828,

shown smaller

than actual size.

SPECIFICATIONS

Accuracy: ±1.5% of full scale,

including linearity over 15 to 25°C and 5 to 60 psia (0.35 to 4.2 kg/cm ±3% of full scale, including linearity over 0 to 50°C and 1 to 500 psia (0.07 to 10 kg/cm

Repeatability: ±0.5% of full scale and for units ≥100 scm from 0 to 20% of range 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 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

Max Gas Pressure: 500 psig (35 kg/cm Gas and Ambient Temp: 0 to 50°C (0 to 122°F) Leak Integrity: 1 x 10 helium max. to outside environment

Ma terials in Fluid Contact:

Aluminum Models: Anodized aluminum, 316 SS, brass and FKM O-rings Stainless Steel Models: 316 SS and FKM O-rings

)

gauge); 20 psig optimum

);

std cc/sec of

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Dimensions: cm (in)

Output Signal Linear 0 to 5 Vdc: 1000 Ω min load; 4 to 20 mA: 50 to 250 Ω loop resis Transducer Power: 12 Vdc @

200 mA max.

Shipping Weight: 1.1 kg (2.5 lb) Compliance: EN55011 class 1, class B;

EN50082-1

Connection Unit Max Lay Length Maximum Maximum Compression Flow Rate with Fittings Height Width Fitting

10 SCCM to 10 SLM 12.8 (5.02) 14.2 (5.60) 2.5 (1.00) ¹⁄₄" 15 to 50 SLM 15.6 (6.15) 15.2 (5.98) 3.2 (1.25) ¹⁄₄" 60 to 100 SLM 15.9 (6.27) 15.2 (5.98) 3.2 (1.25) ³⁄₈" 200 SLM 22.4 (8.83) 16.8 (6.60) 4.4 (1.75) ³⁄₈" 500 SLM 24.6 (9.67) 19.3 (7.60) 7.6 (3.00) ¹⁄₂" 1000 SLM 18.5 (7.30) 21.8 (8.60) 10.2 (4.00) ³⁄₄ FNPT

To Order Visit omega.com/fma1700_1800 for Pricing and Details

Model No. Model No. Model No. Model No. Aluminum/Brass Stainless Steel Aluminum/Brass Stainless Steel Range Maximum Body with Display Body with Display Body without Display Body without Display Code** Flow Rate

FMA1802 FMA1802ST FMA1702 FMA1702ST 02 10 sccm FMA1804 FMA1804ST FMA1704 FMA1704ST 04 20 sccm FMA1806 FMA1806ST FMA1706 FMA1706ST 06 50 sccm FMA1808 FMA1808ST FMA1708 FMA1708ST 08 100 sccm FMA1810 FMA1810ST FMA1710 FMA1710ST 10 200 sccm FMA1812 FMA1812ST FMA1712 FMA1712ST 12 500 sccm FMA1814 FMA1814ST FMA1714 FMA1714ST 14 1 SLM FMA1816 FMA1816ST FMA1716 FMA1716ST 16 2 SLM FMA1818 FMA1818ST FMA1718 FMA1718ST 18 5 SLM FMA1820 FMA1820ST FMA1720 FMA1720ST 20 10 SLM FMA1823 FMA1823ST FMA1723 FMA1723ST 23 15 SLM FMA1824 FMA1824ST FMA1724 FMA1724ST 24 20 SLM FMA1826 FMA1826ST FMA1726 FMA1726ST 26 30 SLM FMA1827 FMA1827ST FMA1727 FMA1727ST 27 40 SLM FMA1828 FMA1828ST FMA1728 FMA1728ST 28 50 SLM FMA1840 FMA1840ST FMA1740 FMA1740ST 40 60 SLM FMA1841 FMA1841ST FMA1741 FMA1741ST 41 80 SLM FMA1842 FMA1842ST FMA1742 FMA1742ST 42 100 SLM FMA1843 FMA1843ST FMA1743 FMA1743ST 43 200 SLM FMA1844 FMA1844ST FMA1744 FMA1744ST 44 500 SLM FMA1845 FMA1845ST FMA1745 FMA1745ST 45 1000 SLM

Comes with dual

Insert range code, see table above.

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. To request a custom calibration add the gas abbreviation and pressure as a suffix to the model number.

⁄

FNPT connections instead of compression fittings.

Accessories

Model No. Description FMA178PW Socket plug-in power supply for 115 Vac (recommended) FMA178C Female 9-pin D-connector with 1 m (3') of ribbon cable, 0 to 5 Vdc output FMA178C-MA Female 9-pin D-connector with 1 m (3') of ribbon cable, 4 to 20 mA output FMA178PW-220VAC Socket plug-in power supply for 220 Vac, VDE plug type FMA178BP Portable battery pack, with recharger for 115 Vac FMA178BP-220VAC Portable battery pack, with recharger for 220 Vac FMA18RC10 3 m (10') cable for remotely locating LCD of FMA1800 FMA18RC25 7.6 m (25') cable for remotely locating LCD of FMA1800

Comes complete with compression fittings, operator’s manual, NIST certificate. Power supplies sold separately. For 24 Vdc powered units, add suffix “-24VDC” to model number, no additional price. For oxygen cleaned units, add suffix “-02CLEAN” to model number for additional price.

Ordering Examples: FMA1712, AL/BR body flowmeter without an integral display, calibrated for nitrogen at 20 psig, ambient temperature from 0 to 500 SCCM.

FMA1810, AL/BR body with display and FMA178PW, power supply.

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