In-Line Immersible Thermal Gas Mass Flow Meter with Flow Conditioning
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In-Line Immersible Thermal Gas Mass Flow Meter with Flow Conditioning ■ Direct mass flow monitoring eliminates need for seperate temperature and pressure inputs ■ Built-in flow conditioner which eliminates velocity-profile distortions caused by upstream disturbances ■ Accuracy +/- 1% of reading plus 0.5% of full scale ■ Patented Dry-Sense™ technology eliminates sensor drift ■ State-of-the-art calibration facility insures a highly accurate calibration that matches the application ■ Field validation of meter electronics and sensor resistance verifies flow meter performance ■ One-second response to changes in flow rate ■ FM, CSA, PED and ATEX certified for hazardous areas ■ CE approved ■ Multipoint options available ■ Integrated purge option available ■ Optional HART, Modbus and Profibus DP available, Foundation Fieldbus Ohe FlatTrak™ 780S flow body eliminates velocity profile distortions, swirl and temperature stratifications in the gas stream and reduces the amount of upstream piping required for accurate flow measurement. The versatile microprocessor-based transmitter integrates the functions of flow measurement, flow-range adjustment, meter validation and diagnostics, in either a probe-mounted or remote housing. Mass flow rate and totalized flow, as well as other configuration variables, are displayed on the meter's optional 2 x 12 LCD display. The programmable transmitter is easily configured via an RS-232 communication port and Sierra's Smart Interface™ software, or via the display and magnetic switches on the instrument panel. Sierra's state-of-the-art calibration facility insures that the calibration will match the application, and our patented Dry-Sense™ thermal sensor insures the 640S will hold this calibration over time. Sierra's Smart Interface™ software guides you through a procedure to fully validate instrument performance. The meter is available with a variety of input power, output signals, mounting and packaging options.

DIMENSIONAL SPECIFICATIONS 1-inch Through 8-Inch NPT—Front View (E2) 1-inch Through 8-Inch NPT—Side View (E2) 1/2 and 3/4-inch 150 lb Flange— Front View (E2) Male Male NPT NPT ThreadThread 1/2 and 3/4-inch 150 lb Flange— Side View (E2) Sizes for 150 lb ANSI Flange H1 Sizes For 150 Lb Ansi Flanges 3/4-inch NPT Typ. All dimensions are inches. Millimeters are in parentheses. All drawings have a +/-.25-inch (6.4 mm) tolerance. Certified drawings are available on request.

Sizes For 150 Lb Ansi Flanges All dimensions are inches. Millimeters are in parentheses. All drawings have a +/-.25-inch (6.4 mm) tolerance. Certified drawings are available on request.

PERFORMANCE SPECIFICATIONS Repeatability +/- 0.2% of full scale Temperature Coefficient +/- 0.02% of reading per °F within +/- 50° F of customer specified conditions +/- 0.03% of reading per °F within +/- 50° F to 100° F of customer specified conditions +/- 0.04% of reading per °C within +/- 25° C of customer specified conditions +/- 0.06% of reading per °C within +/- 25° C to 50° C of customer specified conditions Pressure Coefficient .02% per psi for air, consult factory for other gases Response Time One second to 63% of final velocity value OPERATING SPECIFICATIONS Gases Most gases...

PHYSICAL SPECIFICATIONS Wetted Materials 316L stainless steel Carbon steel flow bodies available in some sizes Displays Alphanumeric 2 x 12 digit backlit LCD Adjustable variables via on-board switches (password protected) or with Smart Interface™ software Adjustable variables Full scale (50 to 100 %) Time Response (1 to 7 seconds) Correction factor setting (0.5 to 5) Zero and span High and low alarm settings Totalizer Seven digits (9,999,999) in engineering units Resettable by software, on-board switches or external magnet Software Smart Interface™ Windows®-based software Minimum 8 MB of...

Features Option Note: Carbon steel, Hastelloy®, PVC, and Kynar flow bodies are available. Consult Factory for information.

1 Correlation calibration - consult Gas Table for accuracy. Note: Consult Product Data Sheet for flow rate, pressure, and temperature limits. Option 1 : Digital Communications Note: All except Pulse require DC power (P2). Note: Consult factory for O2 Cleaning of meters over 4-inches (DN100).

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