Sper Scientific 850014 Sound Level Meter - Mini User Manual

Page 4

3. OPERATING INSTRUCTIONS
Keep the microphone dry and avoid strong

vibrations. Use the

WINDSCREEN (1) at wind

speeds over 10m/sec.

3-A. MEASURING PROCEDURE
• Turn the meter on by pressing the

POWER (9)

button. The meter defaults to the A frequency

and FAST response.

• Press the

A/C (4) button to toggle between

frequency scales. The A scale is shown as

“dBA” and the C scale is shown as “dBC”.

Select the A scale to simulate the human ear’s

response. A is generally used for environmental

measurements. The C scale approximates a

flat response and is typically used to measure

low-frequency machinery noise where the

target sound level is already known.

• Press the

FAST/SLOW (6) button to toggle

between response-time scales. Select FAST

for general applications and SLOW to check the

avg. level of fluctuating noise, like machinery.

• Point the

MICROPHONE (2) at the sound

source. The decibel level is displayed.

•

Press the

BACKLIGHT (7) button to turn

on/off the illuminated display. The backlight

auto-matically turns off after 15 seconds.

•

Press the

POWER (9) button to turn the meter off.