Extech Instruments 45158 User Manual

Model 45158 - Version 1.8 - May 2003
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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)
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 (
o
F/
o
C), Humidity (RH%), Dew Point (TD), &
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
then release both buttons
• 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 (
o
C or
o
F)
• Turn the meter OFF first. Press and hold down both buttons until the display turns on
and begins blinking
then release the buttons
• 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
the ON/OFF/HOLD button to activate Data Hold
• As long as the ON/OFF/HOLD button is held the reading will remain on the LCD
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Extech Instruments 45158 Specifications

General

Brand	Extech Instruments
Model	45158
Category	Measuring Instruments
Language	English