Extech 407113 Operating Manual

User's Guide

Heavy Duty CFM Thermo-Anemometer
Model 407113

3

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. Other functions include MIN/MAX
Record/Recall, RS-232 PC interface, and Data Hold. The metal vane sensor offers
rugged durability and higher temperature withstand than comparable devices. Careful
use of this meter will provide years of reliable service.

Specifications

General Specifications

Display Dual Display Multi-function 10,000-count (0 to 9999) LCD
Measurements Air Velocity: m/s, km/h, ft/min, knots, mph;

Air Flow: CMM (m

Temperature: °C and °F
Data Hold Freezes displayed reading
Sampling rate One (1) reading per second
Sensors Air velocity/flow sensor: Metal angled vane arms with low-

friction ball bearing. Temp. Sensor: Precision thermistor
MIN/MAX Records/Recalls lowest and highest readings
Auto Power OFF Automatic shut off after 15 minutes
PC Interface RS-232 Serial Communications (16-bit data stream)
Over range indication 1___ appears on the LCD
Low battery indication LBT appears on the LCD
Power supply 9V Battery (consumption 8.3mA approx.)
Operating conditions Meter: 32 to 122
Sensor: 32 to 175

Dimensions / Weight Main instrument: 7.1 x 2.8 x1.3" (180 x 72 x 32mm)

Sensor head: 2.8” (72mm) diameter
Weight 0.84 lbs. (381g) for meter and sensor

3

/min) and CFM (ft3/min);

o

F (0 to 50oC); 80% RH max.

o

F (0 to 80oC)

2

Model 407113 V3.2 07/07

Range Specifications

Air Velocity Measurements Range Resolution Accuracy (%rdg)

m/s (meters per second) 0.50 - 35.0 m/s 0.01 m/s<10

± (2% + 0.2m/s)

0.1 m/s >10
km/h (kilometers per hour) 1.8 – 126.0 km/h 0.1 km/h ± (2% + 0.8km/h)
ft/min (feet per minute) 100 – 6890 ft/min 1 ft/min ± (2% + 40ft/min)
mph (miles per hour) 1.1 – 78.3 mph 0.1 mph ± (2% + 0.4m/h)
knots (nautical miles per hour ) 1.0 to 68 knots 0.1 knots ± (2% + 0.4knots)
Air Flow Measurements Range Resolution Area
CMM (cubic meters per minute) 0-999,900 m3/min 0.001 to 100 0 to 9,999m2
CFM (cubic feet per minute) 0-999,900 ft3/min 0.001 to 100 0 to 9,999ft2

Air Temperature Range Resolution Accuracy
32 to 175oF (0 to 80oC) 0.1o F/C 1.5oF (0.8oC)

3

Model 407113 V3.2 07/07