Extech Instruments SL250W, 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 battery icon appears on the display, replace the batteries immedi-
ately 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 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 in hand, set it on a desk or table, or mount it on a tripod in
the area under test.
3. Read the sound level measurement on the LCD. Sound level measure-
ments are presented in A-weighted decibel units. A-weighted measure-
ments simulate the response curve of the human ear to sound.
4. If the measurement is over range, OL will appear on the display in place of
a typical reading. If the measurement is under range, UN will appear.
CAUTION
Do not touch or otherwise obstruct the microphone.
Do not allow liquids to come in contact with the microphone.
Do not allow dust or other particles to enter the microphone.
Use the windscreen to cover the microphone in windy environments.
#NAS100077; r. AA/78958/78963; en-US 6