Flow Totalizer
20Pages

The Thermal Mass Flow Meter for High Accuracy Air, Gas, and Mixture Flow Measurement

Manufacturing and industrial process control depend on the highest accuracy air, natural gas, and gas mixture flow measurement possible to assure maximum productivity, efficiency and end-product quality. Today, Sierra's revolutionary QuadraTherm® 640i and 780i deliver the world's most accurate thermal mass flow measurements. Accuracy is as good as, if not better, than Coriolis, at a fraction of the price. Now experience precise mass flow rate, temperature and pressure measurement from a single device. Dry Sensor Breakthrough In the late 1990's, Sierra experienced its first...

640i/780i Highlights • Accuracy: +/- 0.5% of reading (inline); +/- 0.75% of reading (insertion) • Gases: Air, natural gas, mixtures, flammables, inert gases • Flow rates: Down to 0.03 smps (0.1 sfps) & up to 305 smps (60,000 sfpm) • Pipe/duct sizes up to 72” (182 cm) • Hot-tap probe retractor • 100:1 turndown • Free user software • Multivariable: Mass flow rate, temperature & pressure • In-Situ calibration validation • Built in flow conditioning • No moving parts, low pressure drop • Patented QuadraTherm four-sensor design • DrySense no-drift sensor with lifetime warranty • Raptor OS...

The user can also collect flow and composition trend analysis, flow alarming, and triggers. Sierra has many more apps under development to enhance your product experience. When released, you can immediately download and begin using them. SierraLoop World Class Calibration Designed by Sierra and located at our metrology headquarters in Monterey, California, SierraLoop™ is among the world's most accurate private gas flow calibration facilities. Rated at +/- 0.3% of reading, all calibrations follow the guidelines of ISO 17025 and are traceable to national standards such NIST (United States...

Gas Measured All inert gases and all non-condensing clean gases Flammable gases: methane, propane, hydrogen, digester gas, natural gas Corrosive gases compatible with 316L stainless steel qTherm Gas Library: most common gases and mixtures; air is standard; qTherm Dial-A-Gas option for choice of three additional gases Mass Velocity Range for Air 0 to 60,000 sfpm (0 to 305 smps) at 21.1 °C (70°F), 1 atm Multivariable Outputs Mass flow rate (standard) Temperature (standard) Pressure (optional) Totalized flow: totalized value is stored in non-volatile memory Mass Flow Accuracy 780i Inline...

Notes: (1) Number of diameters (D) of straight pipe required between upstream disturbance and the flow meter (2) Number of diameters (D) of straight pipe required downstream of the flow meter Mass Flow Rate scfm (3) (nm3/h) (4) Notes: (1) For air and nitrogen at 20°C temperature and 1 atmosphere pressure (3) At base conditions of 21.1°C temperature and 1 atmosphere pressure (2) 1 inch of water at 60°F = 0.0361 psi (4) At base conditions of 0°C temperature and 1 a

640i INSERTION DIMENSIONAL DRAWINGS P2-DD—Side View P2-DD Flange Fitting—Side View cFMus, ATEX, IECEx Approved Probes ( > 13” ) P2-DD Compression Fitting—Side LView Note: All dimensions in inches with (mm) in brackets; certified drawings available upon request. All drawings have ± .25 inch (6.4 mm) tolerance. Length Chart 640i Compressions Fittings Code Length Chart 640i Flange Mounting

640i INSERTION DIMENSIONAL DRAWINGS Remote Probe VT—Side View Remote Probe VT—Front View 6.7 Remote Electronics VT, VTP—Side View (170) PER CUSTOMER CABLE LENGTH Per customer REQUIREMENT cable 200 FEET MAXIMUM length requirement 200 feet maximum Remote Probe VTP—Front View Remote Probe VTP—Side View 4.7 (120) P3-DD Remote Bracket—Side View P2-DD Remote Bracket—Side View Remote Bracket—Front View Note: All dimensions in inches with (mm) in brackets; certified drawings available upon request. All drawings have ± .25 inch (6.4

Mounting Holes for Remote Bracket Length Chart 640i Remote Mount Junction Box 640i INSERTION LOW PRESSURE HOT TAP to 150 psig (10.3 barg) 6.7 (170) Variables L = Nominal Probe Length D = Duct O.D. C = Duct I.D. T = Height of "Threadolet” or Customer Provided Weldolet R = Restraint Cable Length Formula L > 12.3 + T + D/2 So L must be equal or greater than 12.3-inches plus the height of the "Threadolet” plus half the duct O.D. R = D/2 + T + 7.3 B= Distance From Duct OD To Flange Face C= Duct Inner Diameter D= Duct Outer Diameter

1/2" Through 1 1/2" NPT—Front View Flow Conditioning Element (see TABLE 2, page 5) 1/2" Through 11/2" 150 Class Flange-Side View1/2" Through 1 1/2" 150 Class Flange-Front View Sizes For ANSI Class 150 Flange

2" Through 8" 150 Class Flange—Side View 2" Through 8" 150 Class Flange—Front View Sizes for ANSI Class 150 Flanges 2" Through 8" NPT—Side View 2" Through 8" NPT—Front View Flange Remote—Front View

Dial-A-Gas Selection Instructions: To order a 640i, please fill in each feature number block by selecting the codes from the corresponding features below. *Feature 10 is air (always included)

ORDERING THE 640i INSERTION (continued) Feature 4B: Sensor Shield & Mounting Option Kits: Add 1-inch (25.4 mm) diameter stainless steel welded-on sensor shield to the end of the insertion probe for improved sensor protection. Note: Available with cFMus and ATEX/IECEx except DP1. All Digital Communications options available in P2 only.

Dial-A-Gas Selection Option 1 Instructions: To order a 780i, please fill in each feature number block by selecting the codes from the corresponding features below. *Feature 9 is air (always included) Note: Put N/A in feature block 9 for VT or E4 meters. Maximum operating pressure must not exceed the full scale of the pressure transducer if the VTP option is ordered or damage may occur.