407117 Datasheet, PDF (5/6 Pages) Extech Instruments Corporation. – Heavy Duty Mini Vane CFM Thermo Anemometer

Auto Power Off
To save battery life, the meter will automatically shut off after approximately 15 minutes of
operation. To disable this feature, press the RECORD/RECALL button and enter the
RECORD mode.
Air Flow Measurements (CMM / CFM)
1. Connect the sensor to the sensor input jack on top of the meter.
2. Turn on the meter using the Power button.
3. Select the FLOW mode using the VEL/FLOW button. The LCD will display FLOW when
the flow function has been properly selected.
4. Select the desired air flow units: CMM (cubic meters per minute) or CFM (cubic feet
per minute) using the UNIT button. The LCD will reflect the selection.
5. Press the SAMPLE AREA button to begin entering the area in m² or ft². Use the
button to increment the flashing digit, use the button to decrement the flashing digit,
use the button to select the next digit, and use the MAX/MIN button to set the
decimal point. Press the ENTER/RESET button when the area has been entered. The
bottom display (normally used for the temperature display) will indicate the area
entered in ft² or m². The main LCD displays the air flow in CFM (cubic feet per minute)
or CMM (cubic meters per minute). If the CFM or CMM reading exceeds 9999, use the
displayed X10 or X100 multiplier to calculate the reading.
6. For air flow measurements, three modes apply: The normal, default mode, where the
actual flow is indicated, and the two modes described below: Press the FLOW/MODE
button to select one of the two modes listed below:
2/3V MAX MODE: LCD displays 2/3 the measured value.
AVG MODE: Up to 20 readings can be taken separately and averaged. Select the
AVG mode via the FLOW/MODE button and then press the AVG/START button to
take a reading. Up to 20 readings can be taken and averaged. The lower LCD
display provides a 1 to 20 counter that increments each time a reading is taken.
The main LCD displays the averaged air flow.
7. Note that the temperature function is not active in the AIR FLOW mode.
RS-232 PC Interface
The 407117 is equipped with a 3.5mm phone jack (meter top) for connection to a PC for
data acquisition purposes. To obtain PC interface cabling and Windows^TM data acquisition
software, contact Extech Instruments. Instructions for use are provided with the optional
data acquisition software/hardware kits.
Battery Replacement
When the LBT icon appears on the LCD, the 9V battery must be replaced.
1. Remove the rubber holster that surrounds the entire meter
2. Slide off the rear battery compartment
3. Replace the 9V battery
4. Affix the battery compartment cover and the meter holster
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.
Copyright © 2005 Extech Instruments Corporation.
All rights reserved including the right of reproduction in whole or in part in any form.
5 Model 407117 - Version 2.1 - November 2005