9
MEASUREMENT PROCEDURES
Note…
Wind blowing across the microphone may cause additional noise and
affect the reading. When taking measurements in a windy environment,
the windscreen must be used to prevent interference.
A-Weighting:
Per the IEC 61672:2003, it is weighting applied to account
for relative loudness perceived by the human ear.
C-Weighting:
Mandated to Class I sound level.
1. Press
POWER
to turn the meter on.
2. Press
FAST/SLOW
to toggle between fast and slow response time.
a. Select “FAST” response time to measure sound peaks or short
bursts of sound across 125 miliseconds.
b. Select “SLOW” response time to measure average sound levels
across 1 second.
3. Press
A/C
to toggle between A- and C-weighting.
a. Select A-weighting.
b. Select C-weighting.
4. Hold the instrument in your hand or fix it on a tripod and point the
microphone at the source of the sound.
5. The sound pressure level displays.
Backlight
1. Press
BACKLIGHT
to illuminate the LCD screen.
2. The backlight will shut off automatically after 30 seconds, or press
BACKLIGHT
to turn it off sooner.
Minimum/Maximum Mode
1. Press
MIN/MAX
to enter Minimum/Maximum Mode and record
minimum and maximum values. “MAX” displays along with the
maximum value.
2. Press
MIN/MAX
. “MIN” displays along with the minimum value.
3. Press
MIN/MAX
. “MIN MAX” blinks to indicate that the meter
is recording minimum and maximum values. The current value
displays on the LCD.
4. Press and hold
MIN/MAX
for 2 seconds to exit Minimum/Maximum
Mode and clear the readings.
