Extech 407412 Instruction Manual
User's Manual
Hygro Thermo-Anemometer
Model 407412
2
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects
in parts and workmanship for one year from date of shipment (a six month limited
warranty applies on sensors and cables). If it should become necessary to return the
instrument for service during or beyond the warranty period, contact the Customer
Service Department at (781) 890-7440 for authorization. A Return Authorization (RA)
number must be issued before any product is returned to Extech. The sender is
responsible for shipping charges, freight, insurance and proper packaging to prevent
damage in transit. This warranty does not apply to defects resulting from action of the
user such as misuse, improper wiring, operation outside of specification, improper
maintenance or repair, or unauthorized modification. Extech specifically disclaims any
implied warranties or merchantability or fitness for a specific 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
WARRANTY
Congratulations on your purchase of Extech's Hygro Thermo-Anemometer. This Heavy
Duty meter measures and displays Air Velocity + Temperature and Relative Humidity +
Temperature. Air flow can be displayed in the following units of measure: feet per minute,
meters per second, miles per hour, kilometers per hour, and knots. Temperature and RH
units are displayed in oC/oF and % units respectively. Careful use of this meter will provide
years of reliable service.
Specifications
General Specifications
Display Dual function, 3-1/2 digit (2000 count) LCD display
Units of measure m/s (meters per second), km/hr (kilometers per hour), ft/min (feet per
Data hold Holds reading on the LCD display when button is pressed
Sensors Air velocity sensor: Twisted vane arm with low friction ball bearing;
Max/Min Record Records highest and lowest readings for later recall
Data Output RS-232 serial PC interface
Operating Temp. 32°F to 122°F (0°C to 50°C)
Operating Humidity Max. 80% RH.
Power Supply 9V battery
Power Consumption Approx. 8.3 mA DC
Weight 0.77 lbs. (350g)
Dimensions Meter: 7.1x2.8x1.3" (180 x 72 x 32mm);
Accessories Anemometer/temperature and RH Probes, 9V battery, & case
minute), knots (nautical miles per hour), mile/hr (miles per hour);
Temperature: °C/°F; Humidity: %RH
Temperature: Precision thermistor; Humidity: Thin film capacitor
Anemometer Probe: 0.7" (17mm) Diameter x 6.7" (170mm)
Model 407412 May 2001 Rev. 1.6
3
RH Probe head
Range Specifications
Air velocity
Measurement Range Resolution Accuracy
ft/min 80-4930 ft/min 1 ft/min
m/s 0.4 - 25.0 m/s 0.1 m/s
km/hr 1.4 - 90.0 km/hr 0.1 km/hr
±(2% + 20ft/min)
±(2% +2digits)
mile/hr 0.9-55.9 mile/hr 0.1 mile/hr
knots 0.8 - 48.6 knots 0.1 knots
Temperature
Range Resolution Accuracy
32oF to 122oF / 0oC to 50oC / 0.1oC/oF ±1.5oF / ±0.8oC
Relative Humidity
Range Resolution Accuracy
10 to 70% RH 0.1% ±3% RH
70 to 95% RH 0.1% ±4% RH
Meter Description
1. LCD Display
2. POWER button
3. Data Hold button
4. °C/°F Selection button
5. Function switch
6. Data Record button
7. Data Recall button
8. Units select button
9. RS-232 output jack
10. Probe input socket
11. Battery compartment
9 10
1
3
2
6
4
5
7
8
11
(rear)
Vane
Probe head
Probe
Handles
Probe
Plugs
Model 407412 May 2001 Rev. 1.6
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