Extech 407112 Instruction Manual

User's Manual

Model 407112
Heavy Duty Vane Thermo-Anemometer

2

Introduction

Congratulations on your purchase of Extech's Heavy Duty Anemometer. The Heavy Duty
Anemometer is an instrument used for measuring the speed (velocity) at which air is flowing.
Extech's vane anemometers indicate air flow in five units of measure: Feet per minute,
Meters per second, Miles per hour, Kilometers per hour, Knots.
Vane anemometers use a remote wheel that freely rotates in response to air flow. In addition
to air velocity, Extech's Vane Anemometers measure temperature in both Centigrade and
Fahrenheit via a built in thermistor.

Specifications

Circuit Custom LSI microprocessor circuit.
Display Dual function , 13 mm(0.5") Super large 1999 count LCD

Measurement units m/s, km/h, ft/min, knots , mph, Temp.- OC, OF.,
Data hold Retain reading in display
Sensor Structure Air velocity sensor :Conventional twisted vane arms and low -

Memory Recall Records Max, Min and Average readings with RECALL.
Power off Auto shut off saves battery life, or manual off by push button.
Data Output RS 232 PC serial interface.
Operating Temp.
(instrument only)
Operating Humidity Max. 80% RH.
Power Supply 006P DC 9V battery (Heavy duty type).
Power Current Approx. DC 8.3 mA.
Weight 0.84 LB / 381 g (included batteries & probe)
Size Main instrument: 7.1 x 2.8 x1.3 inch (180 x 72 x 32 mm)

Accessories Instruction manual, Sensor probe

Air Velocity Specifications

Measurement Range Resolution Accuracy

ft/min (feet/min) 80 - 4921 ft/min 1 ft/min ± (2% + 20ft/min)

m/s (meters/sec) 0.4 - 25.0 m/s 0.1 m/s

km/h (kilometers/hour) 1.4 - 90.0 km/h 0.1 km/h

mph (miles/hour) 0.9 - 55.9 mph 0.1 mph

knots (nautical miles/hour ) 0.8 to 48.6 knots 0.1 knots

Temperature Specifications:

Range (probe only) Resolution Accuracy +/­32OF to 122OF / 0OC to 50OC 0.1OF / 0.1OC 1.5OF / 0.8OC

display with contrast adjustment for best viewing angle.

friction ball-bearing design. Temperature sensor :Precision
thermistor.

0 °C to 50 °C (32 °F to 122 °F).

Sensor Head: Round, 72 mm diameter

(% of full scale)

± (2% + 1d)

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