Sper Scientific 840005 Sound Meter - Analog - Manual (Page 2)

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Introduction: Use to measure sound
levels in the workplace, environmental
noise pollution, QC inspection of
products, background sounds, traffic
and more. Uses the "A" decibel
frequency weighting. CE Approved.
Operating Procedures:
ƒ Sound Measurement: Set the DIAL
to either Lo or Hi and read your
results on the matching scale.
ƒ Battery Check: Set the dial to
BATT. If the reading is not in the
B. OK zone, replace the battery
with a new 9V battery.
ƒ Internal Calibration: Set the
DIAL to CAL and use a small
screwdriver to turn the CAL ADJ
calibration screw until the
indicator points to CAL 70 dB.
Tips on Measuring Sound:
ƒ
From Objects: Place the meter 40”
from the source.
ƒ Traffic Sounds: Place the meter
40~60” above ground level.
ƒ Indoor Sounds: Place the meter in
the center of the room.
ƒ Intermittent Sounds: Record the
highest value at each occurrence
and compute the average.
ƒ Fluctuating Sound: Record
several measurements and
compute the average.