99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 User's Guide Visit us at www.TestEquipmentDepot.com Heavy Duty CFM Thermo-Anemometer Model 407113 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 FAX 781.665.0780 - TestEquipmentDepot.
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. Introduction Congratulations on your purchase of the Extech 407113 CFM meter. This handheld meter can display Air Flow (CFM) with Area or Air Velocity with Temperature on a 10,000-count (0 to 9999) dual display LCD.
Range Specifications Air Velocity Measurements Range Resolution Accuracy (%rdg) m/s (meters per second) 0.50 - 40.00 m/s 0.01 m/s ± (2% + 0.2m/s) km/h (kilometers per hour) 1.8 – 144.0 km/h 0.1 km/h ± (2% + 0.2km/h) ft/min (feet per minute) 100 – 7880 ft/min 1 ft/min ± (2% + 20ft/min) 1.1 – 89.4 mph 0.1 mph ± (2% + 0.2m/h) 1.0 to 78.1 knots 0.1 knots ± (2% + 0.2knots) Range Resolution Area 3 0.
Meter Description 1. Sensor Input 2. RS-232 PC Interface jack 1 3. LCD Display 2 4. Keypad 5. Rubber Holster 6. Sensor 7. Battery compartment (rear) 6 3 4 5 7 Note: To access the rear battery compartment, first remove the rubber holster that surrounds the meter. 4 Model 407113 Version 1.
Operation Air Velocity Measurements 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 VELOCITY function using the FLOW / VELOCITY button. The LCD will display VEL when the velocity mode is selected. 4. Select the desired temperature units using the C/F select button. The LCD will reflect the current unit selection. 5. Select the desired air velocity units using the UNIT button. The LCD will reflect the current unit selection. 6.
Air Flow (Volume) 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 FLOW/VELOCITY button. The LCD will display FLOW CFM or FLOW CMM when the flow function has been 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.
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 Useful Equations and Conversions Area equation for rectangular or square ducts Area (A) = Width (W) x Height (H) Height (H) Width (W) Area equation for circular ducts Area (A) = Radius Where x r2 = 3.
