407114 Datasheet, PDF (4/8 Pages) Extech Instruments Corporation. – CFM Thermo Anemometer Air Velocity, Air Flow, and Temperature

Meter Description
1. Sensor plug. Can be inserted in the
sensor jack from only one direction.
Ensure proper orientation before
exerting force to plug in the sensor.
2. PC Interface jack (RS-232). For
use with the interface cable
provided in the optional 407001 PC
Data Acquisition kit.
3. LCD Display for Air Velocity, Air
Flow, and Temperature. Units of
measure and user alerts are also
displayed on the LCD.
4. Vane Sensor. Hold the sensor in
the flow of air to initiate a reading.
5. Protective rubber holster. Must be
removed to access the rear battery
compartment.
6. Keypad (see below)
• POWER Press to turn the
meter ON or OFF
• HOLD Press to freeze the
displayed reading. Press again
to unlock display
• C/F Press to select the unit of measure for Temperature readings
• RECORD/RECALL Used to store the highest, lowest, and average readings for
later recall. Refer to the Operation section of this manual for more details. This
button also functions as the DECIMAL point when programming.
• UNIT Press to select the unit of measure for Air Velocity. This button also
functions as the DOWN ARROW button when programming
• FLOW/VELOCITY Press to select the mode of operation. In FLOW mode, the
meter displays air volume. In VELOCITY mode, the meter displays air speed.
•
RIGHT Arrow button. Used when programming.
• UP Arrow button. Used when programming.
• FLOW MODE Press to select the Normal, AVG, or 2/3 MAX Air Flow operational
mode. Refer to the Operation section of this manual for more details.
• AVG/START In the FLOW mode, press to store a reading in the AVERGGE utility.
Up to 20 readings can be averaged. Refer to the Operation section of this manual
for more details.
• ENTER/RESET Used in the Flow mode while entering the duct area. Refer to the
Operation section of this manual.
• AREA Used when manually entering the area of a duct. Refer to the Operation
section of this manual.
7. Battery compartment located on the back of the instrument. The rubber protective
jacket must be removed from the meter to access the compartment.
4
Model 407114 Version 2.0 November 2005