Extech Instruments 250W Series, Руководство пользователя

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Operation
5
5.1 Powering the Meter
The meter operates on three (3) 1.5 V (AAA) batteries, installed in the rear
compartment.
Long press the power button to switch the meter on. Short press the power
button to switch the meter off. If the meter does not switch on, check the bat-
teries for proper orientation.
When the low battery symbol appears on the display, replace the batteries
immediately to ensure accurate readings.
5.2 Auto Power Off (APO)
The meter switches off automatically five (5) minutes after the last button
press.
The default mode for APO is ON (the APO symbol on the display indicates
that APO is enabled).
To switch the APO function off, with the meter switched on, long press the
power
and data hold ( H ) buttons. The APO symbol will switch off, indicating
that the function is disabled. APO is reset each time the meter’s power is
cycled.
Repeat this process to switch APO back on manually.
5.3 Taking Measurements
1. Long press the power button to switch the meter on.
2. Hold the meter with the vane positioned in the flow of air. Allow the air to
enter the vane from the back of the meter. The meter can also be tripod
mounted.
3. Read the velocity measurement on the top row of the LCD. The air temper-
ature reading is shown on the bottom row.
4. The Beaufort scale readings (1 to 12), are represented in the text boxes
on the left side of the LCD.
5. If an air velocity or air temperature measurement is outside the specified
range, OL will appear on the display in place of a typical reading.
6. Short press the power button to switch the meter off.
#NAS100075; r. AA/78827/78827; en-US 6