Battery Replacement - Extech Instruments 45118 Manual De Instrucciones

4. OPERATION
4.1 Select the desired units for air velocity and temperature by momentarily pressing
the UNITS/MODE key from a powered down condition. The LCD will show
temperature units (
repeatedly until the desired units are displaying. When finished, press the
ON/OFF/HOLD key momentarily to restart the meter with the desired units.
4.2 Power the meter by pressing the ON/OFF/HOLD key momentarily. The Dual
Display will illuminate. The top (larger) display indicates air speed and the lower
display indicates temperature.
4.3 Position the meter so that the measured airflow enters the meter vane from the
rear of the meter (opposite side from the front panel logo, part number, etc.).
4.4 Activate Data Hold (to freeze the most recent display), by pressing and holding
the ON/OFF/HOLD key while taking measurements. To return to normal operation,
release the key and restart the meter.
4.5 Max operation: After a measurement session, press and hold the UNITS / MODE
key until the MAX icon appears on the lower left-hand side of the LCD. Both the Air
Velocity and Temperature indication will represent the highest readings measured
since the meter was last powered.
4.6 Average mode operation: Normally the meter averages readings every 2
seconds. To select 5, 10 or 13 second averaging, first press and hold the
UNITS/MODE key until the MAX icon appears. Next, press the key again
momentarily and the AVG icon will appear. The 13 second average mode is
selected. Now press the key again and the number 5 will appear. Leave it there if
an average of 5 seconds is desired. Press the key once more for a 10 second
average mode. To return to normal operation press the UNITS/MODE key
repeatedly until all lower left-hand icons disappear.
4.7 Wind chill indicator: Press and hold the UNITS/MODE key until the MAX icon
appears. Press the key repeatedly until the WCI icon appears. The temperature
display will now factor in the wind chill. To return to normal operation, press the
UNITS/MODE key again and the WCI icon will disappear.
4.8 AUTO POWER OFF: After approx. 20 mins, if meter keys are not touched, the
meter automatically shuts down to preserve battery life.

5. BATTERY REPLACEMENT

If the meter will not power up as usual or the display contrast becomes weak and difficult
to read, replace the lithium battery. To do so, turn the battery compartment cover in a
CLOCKWISE direction to remove it. The battery will be visible in the battery compartment,
observe the position of the battery and replace the new one in the same position. Affix the
battery compartment cover by turning it in a COUNTER-CLOCKWISE direction. Dispose
of the lithium battery in accordance with local, state, or national waste disposal codes.
6. VANE IMPELLER REPLACEMENT
NOTE: The anemometer is very accurate at low and mid-range air speeds. Constant use at
very high speeds may damage the impeller's bearing and reduce over-all accuracy.
6.1 To replace the impeller, remove the set screw next to the impeller assembly (on the
rear of the meter). Twist the impeller assembly counter-clockwise to the "O" (open)
position and remove it.
6.2 Install the new impeller by inserting and twisting the new impeller assembly
clockwise then tighten the set screw.
o o
C or F) and Air Velocity units. Press the UNITS/MODE key
3 45118es Ver. 2.1 05/03