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| Interactive Catalog Replaces Catalog Pages Honeywell Sensing and Control has replaced the PDF product catalog with the new Interactive Catalog. The Interactive Catalog is a power search tool that makes it easier to find product information. It includes more installation, application, and technical information than ever before. These PDF files are no longer being updated and will be removed by January 2001. Sensing and Control Honeywell Inc. 11 West Spring Street Freeport, Illinois 61032 w w w aS .D et at o .c w aS he m w w Click this icon to try the new Interactive Catalog. .D at et 4U .c om he 4U Airflow Sensors Microbridge Mass Airflow/Unamplified Figure 1 Heater Control Circuit AWM1000 Series FEATURES Cost-effective microbridge technology Accurate, repeatable airflow sensing Bi-directional sensing capability Low differential pressure sensing Take advantage of microbridge mass flow sensor technology. The AWM1000 series mass flow sensor provides all of the outstanding performance benefits of the standard AWM2000 series in a more costeffective sensor platform. This device provides accurate, repeatable flow sensing. Sensor to sensor interchangeability specifications are approximately twice as large as compared to the AWM2000 series. The heater control circuit in Figure 1 and the sensing bridge supply circuit in Figure 2 are both required for operation per specification. These two circuits are NOT on board the sensor and must be supplied in the application. The differential amplifier circuitry in Figure 3 may be useful in providing output gain and/or introducing voltage offsets to the sensor output (Ref. Equation 1). NOTE: For applications involving sensing hydrogen (H2) gas or helium (He) gas, see Application Note 3, page 131. Figure 2 Sensing Bridge Supply Circuit Figure 3 Differential Instrumentation Amplifier Circuit Airflow Equation 1: Vo 2R2+R1 R1 ( )( )( ) R4 R3 V2-V1 +V offset where V offset VS () R6 R6+R5 Honeywell MICRO SWITCH Sensing and Control 1-800-537-6945 USA 1-815-235-6847 International 1-800-737-3360 Canada 65 Airflow Sensors Microbridge Mass Airflow/Unamplified AWM1000 SERIES ORDER GUIDE (Performance Characteristics @ 10.0 0.01 VDC, 25C) Catalog Listings Flow Range (Full Scale) Pressure Range (See Application Note #1) Output Voltage @ Trim Point Null Voltage Shift, Typ. +25 to -25C, +25 to 85C Output Voltage Shift, Max. +25 to -25C +25 to +85C Repeatability & Hysteresis, Max. Excitation (VDC) (Note 1) Power Consumption (mW) Null Voltage (mV) Response Time (msec) Common Mode Pressure (psi) Sensor Resistance (k) Pin 2-Pin 1, Pin 6-Pin 1 Sensor Current (mA) Pin 2-Pin 1, Pin 6-Pin 1 Temperature Range Termination Weight (grams) Shock Rating 30 mV @ 100 sccm 0.7 mV (max.) 4% Full Scale 4% Full Scale 1% Full Scale Min. 8.0 -- -1.0 -- -- -- -- AWM1100V 200 sccm 4.0 H2O (10 mBar) 20 mV @ 2.0 H2O 0.7 mV (max.) +22% Reading (Note 2) -22% Reading 1% Full Scale Typ. 100.01 30 0.0 1.0 -- 5 0.3 AWM1200V AWM1000 Series AWM1300V +1000 sccm to -600 sccm 50 mV @ 650 sccm 0.7 mV (max.) 4% Full Scale 4% Full Scale 1% Full Scale Max. 15 50 +1.0 3.0 25 -- 0.6 Operating: -25 to +85C (-13 to +185F); Storage: -40 to +90C (-40 to +194F) 2,54 mm (.100 ) centers, 0,635 mm (0.025 ) square 10.8 100 g peak (5 drops, 6 axes) Notes: 1. Output Voltage is ratiometric to supply voltage. 2. Temperature shifts when sensing differential pressure correlates to the density change of the gas over temperature. See Application Note 1. 3. Maximum allowable rate of flow change to prevent damage: 5 SLPM/1.0 sec. MOUNTING DIMENSIONS (for reference only) 66 Honeywell MICRO SWITCH Sensing and Control 1-800-537-6945 USA 1-815-235-6847 International 1-800-737-3360 Canada Airflow Sensors Microbridge Mass Airflow/Unamplified OUTPUT FLOW VS INTERCHANGEABILITY (Note 1) AWM1100V Press mBar 0.49 0.35 0.21 0.09 0 -0.09 -0.21 -0.35 -0.49 Flow sccm 200 150 100 50 0 -50 -100 -150 -200 Nom. mV 44.25 38.75 30.00 18.40 0.00 -18.40 -30.00 -38.75 -44.25 Tol. mV 4.25 3.00 1.00 2.00 1.00 3.90 5.00 7.65 9.75 AWM1200V Flow sccm 120 90 60 30 0 -30 -60 -90 -120 Press. H2O 4.00 3.00 2.00 1.00 0.00 -1.00 -2.00 -3.00 -4.00 (Note 2) Nom. mV 31.75 26.75 20.00 11.20 0.00 -11.20 -20.00 -26.75 -31.75 Tol. mV 8.0 6.0 3.0 4.0 1.0 7.0 7.0 11.0 15.0 AWM1300V Press mBar 3.4 2.4 1.8 0.83 0.31 0 -0.31 -0.83 -1.6 AWM1000 Series Performance Characteristics @ 10.0 0.01 VDC, 25C Flow sccm 1000 800 650 400 200 0 -200 -400 -600 Nom. mV 55.50 52.90 50.00 42.50 29.20 0.00 -28.90 -41.20 -48.20 Tol. mV 7.0 6.0 5.0 6.0 5.0 1.5 15.0 26.0 30.0 Notes: 1. Numbers in BOLD type indicate calibration type, mass flow or differential pressure. Tolerance values apply to calibration type only. 2. Differential pressure calibrated devices are not recommended for flow measurement. Use flow calibrated devices for flow measurement. OUTPUT CURVES Airflow Honeywell MICRO SWITCH Sensing and Control 1-800-537-6945 USA 1-815-235-6847 International 1-800-737-3360 Canada 67 |
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