6
3-D. CALIBRATION
Use Sper Scientific Acoustical Calibrator
850016 (or equivalent) to calibrate the meter.
Perform the calibration at temperatures
between 58-78°F (15-25°C). The calibrator
and meter should be at the same temperature.
• Remove the
WINDSCREEN
(1) and
turn on the meter by pressing the
POWER
(9) button.
• Turn the acoustical calibrator on to 94.0 dB
and place it onto the
MICROPHONE
(2).
• With the meter in FAST response mode
and A (dBA) weighting, press and hold the
A/C
(4) button.
• Without releasing the
A/C
(4) button,
press and hold the
HOLD
(5) button.
The display will go blank.
• Release both buttons and “94.0” ± 0.2
is displayed.
• The calibration process can be repeated
until the meter reads the desired value.
• This completes the calibration process.
4. AUTO POWER OFF
If no buttons are pushed for about 3 minutes,
the meter will automatically turn off.
