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Aalborg XFM17A-VAN6-A2-3CA-01-SS
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<p><strong>Aalborg, XFM17A-VAN6-A2-3CA-01-SS, XFM Digital Mass Flow Meter Aluminum, Viton-A Seals, 1/4" Compression, No Display, Universal 11 to 26 VDC, 0-5 VDC, RS232, Carbon Dioxide CO2 0-10, mL/Min, 14.7 psia Metering Pressure, 21.1 Deg C / 70 Deg F Temperature </strong> </p> <p><strong>Principle of Operation </strong> </p> <p>The stream of gas entering the Mass Flow transducer is split by shunting a small portion of the flow through a capillary stainless steel sensor tube. The remainder of the gas flows through the primary flow conduit. The geometry of the primary conduit and the sensor tube are designed to ensure laminar flow in each branch. According to principles of fluid dynamics, the flow rates of a gas in the two laminar flow conduits are proportional to one another. Therefore, the flow rates measured in the sensor tube are directly proportional to the total flow through the transducer. In order to sense the flow in the sensor tube, heat flux is introduced at two sections of the sensor tube by means of precision-wound heater sensor coils. Heat is transferred through the thin wall of the sensor tube to the gas flowing inside. As gas flow takes place, heat is carried by the gas stream from the upstream coil to the downstream coil windings. The resultant temperature dependent resistance differential is detected by the electronic control circuit. The measured temperature gradient at the sensor windings is linearly proportional to the instantaneous rate of flow taking place. An output signal is generated that is a function of the amount of heat carried by the gases to indicate mass molecular based flow rates. </p>

Attributes

Key ^Value
Attitude SensitivityDeviation of up to 1% from stated accuracy, after re-zeroing
CalibrationsPerformed at standard conditions [14.7 psia (101.4 kPa) and 70 ?F (21.1 ?C)]
CE ComplianceEMC Compliance with 89/336/EEC as amended. Emission Standard: EN 55011:1991, Group 1, Class A Immunity Standard: EN 55082-1:1992
Digital InterfaceRS232
DisplayNo Display
Environmental (PER IEC 664)Installation Level II; Pollution Degree II
Fittings1/4" Compression
Flow Accuracy?1% of FS at calibration temperature and pressure
Flow MediumPlease note that XFM Mass Flow Meters are designed to work only with clean gases. Never try to measure flow rates of liquids with any XFM
Flow Pressure Coefficient0.01% of full scale/psi (6.895 kPa) or better
Flow Response Time600 ms time constant; approximately 2 seconds to within ?2% of set flow rate for 25% to 100% of full scale flow
Flow Temperature Coefficient0.15% of full scale/ ?C or better
Gas ans Ambient Temperature32 F to 122 ?F (0 ?C to 50 ?C). 14 ?F to 122 ?F (-10 ?C to 50 ?C) - Dry gases only
MaterialAluminum
Output Signal0-5 VDC
PowerUniversal 11 to 26 VDC
Relative Gas HumidityUp to 70%
Repeatability?0.25% of full scale
SealsViton-A
Transducer Input PowerCircuit board have built-in polarity reversal protection, 300 mA resettable fuse provide power input protection