Xylem 45158 User Manual

User's Manual

Model 45158 Mini Hygro Thermo-Anemometer

Introduction

Congratulations on your purchase of Extech’s Model 45158 Anemometer. The dual display indicates Air Velocity and Humidity, Dew Point, Ambient Temperature, or Temperature with wind-chill factor. With careful use, this meter will provide years of reliable service.

Specifications

Range Specifications

Measurement Range Resolution Accuracy (% of reading)

MPH (Miles per hour) 1.1 to 62.5 MPH 0.2 MPH ± (3% + 0.4 mph)

km/hr (kilometers per hour) 1.8 to 100.6 km/h 0.7 km/h ± (3% + 1.4 km/hr)

Knots (nautical miles per hour) 1.0 to 54.3 knots 0.3 knots ± (3% + 0.6 knots)

m/sec (meters per second) 0.50 to 28.00 m/s 0.01 m/s ± (3% + 0.2 m/s)

ft/min (feet per minute) 100 to 5500 ft/min 20ft/min ± (3% + 40 ft/min)

Beaufort force 1 to 17 BF 1 BF ± 1

Temperature 0 to 122oF (-18 to 50oC) 0.1oF/C ± 1.8oF (± 1oC)

Relative Humidity 10 to 95% 1% ± 5% RH

Dew Point 32 to 122 oF (0 to 50oC) 0.1oF/C ± 3.6oF (2oC)

General Specifications

Display Dual LCD with low battery and multifunction indicators

Sensors Sapphire bearing, non-corrosive vane for air velocity; Precision

Average Mode Choice of 5 or 10 reading averaging (2 second factory default)

Max and Data Hold Displays Max recalls the highest reading; Data Hold freezes the display

Sample time 1 reading per second for air velocity and temperature

Water-resistant To 3’ (1m)

Operating conditions 5 to 122oF (-15 to 50oC) / < 80% RH

Power supply Lithium battery (CR-2032 or equivalent) / 400 hour battery life

Dimensions / Weight Instrument: 5.25 x 2.75 x 0.75” (133 x 70 x 19mm)

thermistor for temperature measurements

(1 reading per 15 seconds for humidity with 2 second updates)

Vane: 1” ( 24mm ) diameter / 3 oz. ( 95 g )

Meter Description

1 Vane impeller

2 Impeller set screw (on rear of meter)

3 Relative Humidity sensor

4 Temperature sensor

5 LCD display

6 ON/OFF, HOLD key

7 UNITS, MODE key

8 Battery compartment (on rear)

9 Tripod mounting hole

10 Lanyard (neckstrap)

1 2

Operation

Turning the meter ON and OFF

• Press the ON/OFF/HOLD button to turn the meter ON

• Press and hold the ON/OFF/HOLD buttons for approx. 3 seconds to turn it OFF

• The meter’s Auto Power OFF feature turns the meter OFF after 10 minutes of inactivity

Change the lower display parameter

• With the meter ON, press and hold down the ON/OFF/HOLD button

• While continuing to hold the ON/OFF/HOLD button, press the UNITS/MODE button

repeatedly to step through Temperature ( Temperature with wind-chill factor (WCI). Note that the center display is Air Velocity.

Change the Air Velocity unit of measure

• Turn the meter OFF. Press and hold down both buttons until the display turns on and begins blinking

• Press the UNITS/MODE button repeatedly to step through the units (see specs for list)

• After 5 seconds the meter switches back to normal operation mode automatically

Select temperature units (

• Turn the meter OFF first. Press and hold down both buttons until the display turns on and begins blinking

• Press both buttons momentarily to change temperature units

• After 5 seconds the meter switches back to normal operation mode automatically

Taking Measurements

Position the meter so that the airflow enters the meter vane from the rear of the meter (opposite side of front panel logo). A tripod mount is located on the bottom of the meter.

Max Hold

• Max Hold represents the highest measurement taken since the meter was turned on

• Press the UNITS/MODE button to display the Max reading (MAX icon appears)

• Press the UNITS/MODE button repeatedly to step through to the normal operating mode

Average mode

• 5 or 10 reading averages can be displayed in the Average Mode.

• Press UNITS/MODE 3 times for 5 reading averaging or 4 times for 10 readings

• To exit this mode, press the UNITS/MODE button until the icons on the left disappear

Data Hold

• Data Hold freezes the most recent displayed reading

• Press and hold

• As long as the ON/OFF/HOLD button is held the reading will remain on the LCD

then release both buttons

the ON/OFF/HOLD button to activate Data Hold

oF/o

C or oF)

then release the buttons

C), Humidity (RH%), Dew Point (TD), &

Model 45158 - Version 1.8 - May 2003

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