The FMA1700A/1800A Series eletronic gas mass flow meters allow users to monitor 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 3½ digit display and analog output. The display is tiltable over 90 degrees for viewing convenience. The display is calibrated standard to readout 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 FMA1700A/1800A Series are ideal substitutes for many rotameter 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 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 FMA1800A 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.
SPECIFICATIONS Accuracy: ±1% of full scale, including linearity over 15 to 25°C and 5 to 60 psia (0.35 to 4.2 kg/cm²)(For sizes up to 100SLM), ±1.5% of full scale, including linearity over 15 to 25°C and 5 to 60 psia (0.35 to 4.2 kg/cm²)For larger sizes) Turn-Down Ratio: 100:1 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) Response Time: 800 msec time constant; 2 seconds (typical) to within ±2% of set flow rate over 25 to 100% of full scale Power Requirements:12 to 26 Vdc power @200 mA maximum Maximum Gas Pressure: 1000 psig (70 kg/cm² gauge) for ranges upto 100 SLM; 500 psig (35 kg/cm² gauge)Above 100 SLM; 20 psig optimum Gas and Ambient Temperature: 0 to 50°C (0 to 122°F) Leak Integrity: 1 x 10-9; std cc/sec of helium maximum 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 minimum load 4 to 20 mA: 50 to 250 Ω loop resistance Transducer Power: 12 to 26 Vdc @ 200 mA maximum (FMA178PW) Shipping Weight: 1.1 kg (2.5 lb) Compliance: EN55011 class 1, class B; EN50082-1
Rated 4 out of
Sr. Engr. Tech.Always happy with the Omega flow meters. Will keep buying this product.
Date published: 2017-04-05
Rated 2 out of
Poor performanceGenerally unsatisfied with the quality and reliability of this product. For research grade purposes, save your money or go for more reliable and more expensive models.
For the 1700a/1800a series, is there a way to hook up the flow meter (using the serial port) to a computer to export the digital output in order to be able to plot the flow data over time (i.s- use a program such as excel)?
Asked by: Anonymous
No. The FMA1700/1800A series do not have serial communication output. They need a module to have RS232 or RS485 communication. Review module FMI series https://br.omega.com/omegaFiles/green/pdf/FMI-100.pdf
Answered by: ASE HPO
Date published: 2020-02-20
What is the difference between the 1800 and 1800A series flowmeters?
Asked by: JDMorrow
The main difference is the power supply. FMA1800A has range 12-26 VDC for input power supply. The FMA1800 can only take 12 VDC.
Answered by: ASE HPO
Date published: 2020-01-10
Does the FMA1804A come with a standard power supply or does that need to be purchased separately?
Asked by: Anonymous
Hi and thanks for connecting with Omega. The FMA1800A Series comes complete with compression fittings, operator’s manual, and NIST certificate. Power supplies sold separately. The FMA178PW is the recommended power supply per the data sheet on the product page.