English User`s Manual
Contents
1. A Width W x Height H Area equation for circular ducts Area A Tx r Where T 3 14 and r radius x radius Cubic equations CFM ft min Air Velocity ft min x Area ft CMM m3 min Air Velocity m sec x Area m x 60 NOTE Measurements made in inches must be converted to feet or meters before using the above formulae Unit of Measure Conversion Table m s ft min knots km h MPH 1 MPH 0 4464 87 89 0 8679 1 6071 1 5 Model EZ30 Version 1 1 04 06 Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies on sensors and cables If it should become necessary to return the instrument for service during or beyond the warranty period contact the Customer Service Department at 781 890 7440 ext 210 for authorization or visit our website at www extech com for contact information A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse improper wiring operation outside of specification improper maintenance or repair or unauthorized modification Extech specifically disclaims any implied warranties or merchantability2. and Minimum MIN air velocity and temperature readings press the MAX MIN key and the RECORD icon will appear in the display 2 Now use the MAX MIN key to toggle the view from MIN to MAX to RECORD The MAX or MIN will appear along with the recalled reading for convenience In RECORD mode the meter will display the current reading but will continue to capture MAX and MIN readings 3 To return to normal operation press and hold the MAX MIN key for 3 seconds to clear and stop MAX MIN recording The meter will beep twice and the MAX MIN and RECORD icons will switch off 3 Model EZ30 Version 1 1 04 06 Maintenance Battery Replacement When the battery power falls low the low battery icon ia will appear on the LCD Replace the 9V battery by removing the Phillips screw on the battery compartment door and accessing the battery compartment Ensure that the compartment cover is securely fastened when finished Cleaning and Storage Wipe the meter and vane with a damp cloth as needed Do not apply abrasive solvents or other cleaners to the surface of the meter or vane Store with the battery removed and avoid extreme temperature and humidity Specifications Circuit description Display Measurement units Data hold Sensor Structure Memory Recall Auto Power off Operating Temperature Operating Humidity Power Supply Power Consumption Custom LSI microprocessor design Dual function 9999 count
3. LCD display m s km h ft min knots mph Temperature C F Freezes reading on the display Air velocity sensor Conventional twisted vane arm with low friction ball bearing Temperature sensor Type K Record and Recall Maximum Minimum MAX MIN readings After 15 minutes with disable feature 32 F to 122 F 0 C to 50 C 9V battery Approx 8 3mA DC 7 4 oz 210g Main instrument 6 42 x 1 77 x1 34 163 x 45 x 34mm Sensor Head 0 7 17 8 mm diameter Max 80 RH Air Velocity Range Specifications Measurement ft min feet per minute m s meters per second km h kilometers per hour mph miles per hour Range Resolution Accuracy of reading 80 5900 ft min 3 40 ft min 0 40 30 00 m s _ 0 01 m s 3 0 20 m sec 0 9 67 0 mph 0 1 mph 3 0 4 mph knots nautical miles per hour 0 8 58 0 knots 3 0 4 knots Temperature Range Specifications 32 F to 122 F 0 C to 50 C 0 1 F 0 1 C 4 0 F 2 C 1 4 108 0 km h 0 1 km h 3 0 8 km hr 4 Model EZ30 Version 1 1 04 06 Useful Equations and Conversions Volume Measurements To determine CFM cubic feet per minute or CMM cubic meters per minute in a duct the area of the duct must first be measured use the equations below Then multiply an air velocity measurement by the area measurement to obtain CFM or CMM Area equation for rectangular or square ducts Height H Width W Area
4. User s Guide EXTECH INSTRUMENTS EzFlex Thermo Anemometer Model EZ30 Introduction Congratulations on your purchase of the Extech EZ30 Thermo Anemometer The EZ30 measures air velocity in five units of measure feet per minute ft min meters per second m sec miles per hour MPH kilometers per hour km hr amp nautical miles per hour knots An internal Type K sensor allows the EZ30 to measure air temperature in Celsius or Fahrenheit units The 16 406mm flexible gooseneck provides easy access for air velocity and temperature measurement in difficult to reach locations This meter is shipped fully tested and calibrated and with proper use will provide years of reliable service Meter Description 1 2 3 4 5 6 Note Display LCD display Vane sensor Hold Backlight key Units F C key Max Min key On Off key Battery compartment is on rear of unit MAX MIN Record mode 1 2 3 pa oa Temperature display Da a 8 Ces OOO 7 CS ft min 4 LI WIL Low battery indicator AX MIN E Cc Temperature display n E E Velocity units Hold mode MAX or MIN mode Velocity display 2 Model EZ30 Version 1 1 04 06 Operation Meter Power 1 Press the POWER button to turn the meter on If the display does not switch on check that a fresh 9V battery is installed Press the POWER button to turn the meter off 3 The meter is equipped with an AUTO POWER OFF fea
5. or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product The warranty set forth above is inclusive and no other warranty whether written or oral is expressed or implied Calibration and Repair Services Extech offers repair and calibration services for the products we sell Extech also provides NIST certification for most products Call the Customer Service Department for information on calibration services available for this product Extech recommends that annual calibrations be performed to verify meter performance and accuracy Lamy Aa Support Hotline 781 890 7440 Tech support Ext 200 Email support extech com Repair R eturns Ext 210 Email repair extech com Product specifications subject to change without notice For the latest version of this User s Guide Software updates and other up to the minute product information visit our website www extech com Extech Instruments Corporation 285 Bear Hill Rd Waltham MA 02451 Copyright 2006 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 6 Model EZ30 Version 1 1 04 06
6. ture The meter automatically shuts off after 15 minutes to conserve battery energy To disable this feature hold down the UNITS key while turning the meter on disAPO will appear in the display to indicate that Auto Power Off has been disabled Measuring Air Velocity and Temperature 1 Place the sensor in the air stream under test 2 Read the Air Velocity and Temperature measurements directly on the LCD 3 To calculate Air Volume in CFM cubic feet per minute or CMM cubic meters per minute refer to the Useful Equations and Conversions section Selecting the Temperature unit of measure C F Press and hold the UNITS key for 3 seconds to select the temperature unit of measure The meter will beep twice and the display will indicate the currently selected unit of measure Selecting the Air Velocity unit of measure Press the UNITS key to change the unit of measure for Air Velocity measurements The display will reflect the current selection A list of measurement units is printed in the specifications later in this manual Data Hold Backlight To freeze the LCD display momentarily press the HOLD key The HOLD icon will appear on the LCD and the reading will remain unchanged Momentarily press the HOLD button again to return to normal operation the HOLD icon will switch off Press and hold the key for 3 seconds to turn the backlight on off Record and Recall MAX Min Function 1 To begin capturing the Maximum MAX
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