HFM-306
4Pages

Catalog excerpts

www.teledyne-hi.com HFM--306 ((Fllow meter)) • Available flow ranges: 0-2500 slm to 0-8000 slm (N2) FEATURES • Rapid Settling Times • Operating Pressure to 300 PSI • NIST Traceable Calibration APPLIICATIIONS • Delivery Systems • R&D and Process Flows • Petrochemical • Fuel Cell TELEDYNE HASTINGS INSTRUMENTS The 300 Series products contain a number of features that set them apart from other, available instruments: 1. They are inherently linear; no linearization circuitry is employed. Should recalibration in the field be desired (a calibration standard is required), the customer needs to simply set the zero and span points. 2. The output signal is usable for very large overflows and will not come back on scale when a flow an order of magnitude over the full scale flow rate is measured. 3. The instrument incorporates a replaceable sensor module. 4. The unit has very fast settling times. For a full explanation, please see the 300 Series white paper on www.teledyne-hi.com When viewing the electronic version of this Product Bulletin, use this link: http://www.teledyne-hi.com/tech-papers/Flow-Reading.pdf The heart of the instrument is a high speed thermal transfer sensor and a linear laminar flow shunt assembly. The sensor has been optimized to minimize the thermal transfer time in order to speed up the flow response. HFM-306, High Capacity Meter DESCRIPTION Teledyne Hastings Instruments (THI) products represent over 60 years of experience in the design and manufacture of flow instrumentation. The 300 Series is a culmination of this experience with patented technologies that make these the finest flow meters and controllers available today. The THI Mass Flow 300 Series meters and controllers are designed to accurately measure mass flow without corrections or compensations for gas pressure and temperature. The HFM-306 version is accurate to better than ±3.0% of full scale. THI mass flow instruments do not require any periodic maintenance under normal operating conditions with clean gas. In the HFM-306, this pressure drop is measured in an annular region around the laminar flow shunt after the entrance effects and before the exit effect occur. This vastly improves the linearity of the flow divider and minimizes the large changes in linearity that typically occur when the specific gravity of the flowing medium changes. The HFM-306 includes a flow straightening section which helps establish well defined flow for higher accuracy. Instruments are normally calibrated with the appropriate standard calibration gas (air), then a correction factor is used.

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www.teledyne-hi.com Specifications & Standards Hastings Instruments reserves the right to change or modify the design of its equipment without any obligation to provide notification of change or intent to change. Viton® is a registered trademark of Dupont Performance Elastomers Kalrez® Is a registered trademark of DuPont Dow Elastomers Teflon®is a registered trademark of E.I. Dupont de Nemours & Co. VCR® is a registered trademark of Swagelok Company. Standards • EN61010-1 Safety of Electrical Equipment for Measurement, Control and Laboratory Use • EN 61326:1997/A2:2000 Radiated Emissions...

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www.teledyne-hi.com HFM-306 Outline Drawing

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www.teledyne-hi.com Selection Chart PB-164_10/10 © Teledyne 2010 All Rights Reserved. Telephone: (757) 723-6531 Toll Free: (800) 950-2468 Fax: (757) 723-3925 World Wide Web: http://www.teledyne-hi.com E-mail: hastings_instruments@teledyne.com P.O. Box 1436 Hampton, VA 23661 01 02 01 02 01 02 03 01 02 01 01 02 03 04 Curve Pinout H (Std) Pinout U 0-5 Volts (Std) NIST 5 Point (Std) NIST 10 Point 4-20 mA 2” Compression 300 psig (Std) Viton® (Std) Model No. Circuit Output Fittings Seals Pressure Cal Board Order No. Opt ions HFM-306 NIST 20 Point Circuit Board Seals Output Pressure Fittings 1”...

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