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Summary of Contents for Dostmann Electronic VA893
- Page 1 User's Manual VA893 Thermo Anemometer...
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Page 2: Meter Description
Introduction The VA893 Thermo Anemometer instrument measures Air Velocity, Air Flow (volume) and Temperature. The large, easy-to-read backlit LCD includes primary and secondary displays plus numerous status indicators. The meter is shipped fully tested and calibrated and with proper use will provide years of reliable service. -
Page 3: Display Layout
Display Layout • MAX (top of LCD): Max Hold function engaged for the Air Temperature function • HOLD (top of LCD): Data Hold function engaged for the Air Temperature function • VEL: indicates that meter is in air velocity mode •... -
Page 4: Operation
Operation Connecting the Vane 1. The vane plug is inserted in the meter’s sensor jack at the top of the meter. The plug and jack are keyed so that the plug can only fit in the jack one way. 2. Turn the plug carefully until it lines up with the jack and then firmly push the plug in place. - Page 5 Air Flow Measurements (CMM / CFM) Turn on the meter using the ON/OFF button Side view of Press the UNITS button to select the desired air flow Vane units: CMM (cubic meters per minute) or CFM (cubic Arrow feet per minute). NOTE: At power up the meter will display the last unit of measure previously entered.
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Page 6: Battery Replacement
Data Hold (Air Velocity/Air Flow) 1. While taking measurements, press the HOLD button to freeze the air velocity/air flow reading. 2. The HOLD indicator will appear in the bottom of the LCD display. 3. Press HOLD again to return to normal operation. MAX/MIN/AVG Record (Air Velocity/Air Flow) This allows the user to record and view the highest (MAX), lowest (MIN) and average (AVG) readings. -
Page 7: Specifications
Specifications Air Velocity Range Resolution Accuracy m/s (meters per sec) 0.40 - 30.00 m/s 0.01 m/s ± (3% + 0.20 m/s) km/h (kilometers/hour) 1.4 - 108.0 km/h 0.1 km/h ± (3% + 0.8 km/hr) ft/min (feet per minute) 80 – 5900 ft/min 1 ft/min ±... -
Page 8: Useful Equations And Conversions
Useful Equations and Conversions Area equation for rectangular or square ducts Height (H) Area (A) = Width (W) x Height (H) Width (W) Area equation for circular ducts Area (A) = Radius Where = 3.14 and r = radius x radius Cubic equations CFM (ft /min) = Air Velocity (ft/min) x Area (ft...
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