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HFM-305 / HFC-307

HFM-305 / HFC-307
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TELEDYNE HASTINGS HIGH CAPACITY FLOWMETERS AND CONTROLLERS INSTRUMENTS DESIGN FEATURES Teledyne Hastings Instruments (THI) products represent over 55 years of experience in the design and manufacture of mass ﬂow products. The 300 Series is a culmination of this experience with patented technologies that make these the ﬁnest ﬂowmeters and controllers available today. FEATURES • Range — 1000-2500 slm (Air Equivalent); Higher Flows Available • ±1.0% of Full-Scale Accuracy1 • Rapid Settling Times: HFM-305 ≤ 0.4 seconds HFC-307 ≤ 2.0 seconds • Operating Pressures to 500 PSI • NIST Traceable Calibration APPLICATIONS • • • • Gas Blending Research R&D and Process Flows Pollution Monitoring The THI Mass Flow 300 Series products are designed to accurately measure mass ﬂow without corrections or compensations for gas pressure and temperature. They are accurate to better than ±1.0% of full scale. THI mass ﬂow instruments do not require any periodic maintenance under normal operating conditions with clean gases. No damage will occur from the use of moderate overpressures (~500 psi) or overﬂows. Instruments are normally calibrated with the appropriate standard calibration gas (air), then a gas conversion factor (GCF) is used to adjust the output for the intended gas. Special calibrations for other gases, such as oxygen, helium and argon, are available upon special order. 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 linear 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 removable/replaceable sensor module.

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MODELS HFM-305/HFC-307 DESIGN FEATURES (cont) Optional Features ® Fittings–VCR , VCO and Swagelok Cleaned for oxygen service Power supplies/readouts Flow totalizers Alarm set points Interconnecting cables *Note: After changing components, instruments require recalibration to meet accuracy speciﬁcations. Maximum Operating Pressure Pressure Coefﬁcient Leak Integrity Temperature Coefﬁcient (zero) Temperature Coefﬁcient (span) Standard Output Optional Output Attitude Sensitivity of Zero Attitude Sensitivity of Span SPECIFICATIONS HFM-305 Settling Time Power Requirement Wetted Materials Weight...

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All dimensions shown are in inches [mm].

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MODELS HFM-305/HFC-307 Selection Chart Typical instrument ordering/options number: Model No. Circuit Board 500 psi (Standard) Calibration Type Circuit Board NIST 5 Point (Standard) NIST 10 Point Range Information Viton (Standard) Flow Units __________________________ Standard Conditions* _________________ *Referenced to standard temperature and pressure (0°C and 760 Torr, respectively). Selection Chart Typical instrument ordering/options number: Model No. Circuit Board Calibration Type 500 psi (Standard) Calibration Type NIST 5 Point (Standard) NIST 10 Point NIST 20 Point Curve Range...

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