User`s Manual Model 407123 Hot Wire Thermo - Cole
Contents
1. beyond the waranty period contact the Customer Service Department at 781 890 7440 ext 210 for authorization 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 merchantability 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 Copyright 2001 Extech Instruments Corporation All rights reserved including the right of reproduction in whole orin part in any form B Tech Support Hotlines 781 890 7440 ext 200 extech extech com 2 407123 Ver 2 4 01 01 Meter Description 1 LCD Display 2 Keypad 3 Protective Holster 4 Battery compartment rear 5 RS 232 output jack 6 Probe input 1 7 Telescoping probe 2 3 Meter Operation 4 Plug the probe into the probe input socket at the top of the meter Press the Power Off On key to turn the instrument power O2. N Select the temperature units by pressing the C F key The display will indicate C or F as selected Select the air velocity units by pressing the UNIT key The display will indicate m s km h ft min knot or mile h as selected Zero Setting a On the sensor head slide the cover to the UP position to isolate the sensing element from the environment b Press the ZERO button Measurements a Slide the sensor cover to the DOWN position to allow the air velocity sensor to contact the air flow b Extend the telescoping probe to the desired length c Place the sensor head into the air stream with the mark facing towards the direction of the flow Sensor cover in Direction mark up position Sensor open Do Not Touch Probe handle Cover down Direction mark towards wind 3 407123 Ver 2 4 01 01 Data Hold 1 Press the DATA HOLD key to freeze the displayed reading the LCD will display the DH indicator Press the HOLD key again to return to normal operation Data Record Max Min reading 1 When selected the DATA RECORD function records and stores the max and min readings 2 To initiate the DATA RECORD function a Press the RECORD key The REC indicator will appear on the display b Press the RECALL key to enter the MAX mode The MAX indicator along with the maximum values will appear on the LCD display c Press the RECALL key again and the MIN indicator along with the minim
3. User s Manual EXTECH Model 407123 Hot Wire Thermo Anemometer Hot Ware Thermma Petomommeter Introduction Congratulations on your purchase of Extech s Hot Wire Anemometer This meter is equipped with a telescoping antenna indicates air flow in 5 units measures temperature and provides data recording With proper care this meter will provide years of safe reliable service Specifications General Specifications Custom one chip LSI microprocessor circuit Display Dual function 0 5 13 mm 1999 count LCD display Measurement m s meters per second km h kilometers per hour ft min feet per minute knots nautical miles per hour MPH miles per hour Temperature C F Sensor Structure Air velocity sensor Glass bead thermistor Temperature sensor Precision thermistor Main instrument 7 1 x 2 8 x1 3 180 x 72 x 32 mm Probe 12 mm diameter x 940mm maximum length Range Specifications Units Range Resolution Accuracy 3 1d rdg or 1 1d FS whichever is greater Note m s meters per sec km h kilometers per hour ft min feet per min Knots nautical miles per hour MPH miles per hour Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for three years 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
4. on integrity 4 407123 Ver 2 4 01 01 Useful Equations and Conversions Area equations The volume of air flowing through a duct or vent can be determined by taking the area of the duct in square units i e square feet and multiplying this value by the measured linear velocity i e feet per minute This gives ft min x f ft min CFM Cubic equations CFM ft min Air Velocity ft min x Area ft CMM m min Air Velocity m sec x Area m x 60 Units Conversion Table Se a a E mms 1 187 1 944 224 0 00508 1 0 00987 aoe oe rare 01138 Tot 0 5144 101 27 ee EE Ei 1 1523 0 2778 54 69 0 6222 HPS 0 4464 87 89 0 8679 T 07 aor a 5 407123 Ver 2 4 01 01
5. um values will appear on the LCD display d To disable the Data Record function press the RECORD key again The display indicators REC MAX and MIN will disappear Battery Replacement The low battery indication appears as a LBT on the left corner of the display When LBT appears replace the battery as soon as possible Reliable readings can be obtained for several hours after the first appearance of the low battery indication To replace the battery a Remove the meter s protective rubber holster by pulling it over the bottom of the meter b Pry off the rear battery compartment cover with a small coin or screwdriver and remove the batteries b Replace the six AAA batteries and reinstall the cover and holster c Make sure the battery cover is secured after changing the battery RS232 PC Interface The meter is equipped with an RS232 serial data port This interface was designed to operate with the Extech Data Acquisition Software part no 407000 and enables the user to capture store and display readings on a PC For more information contact Extech or refer to the 407000 user s manual Calibration and Repair Services Extech offers complete repair and calibration services for all of the products we sell For periodic calibration NIST certification or repair of any Extech product call customer service for details on services available Extech recommends that calibration be performed on an annual basis to insure calibrati
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