Sper Scientific 840005 User Manual

SPER

SOUND METER

840005

Instruction Manual

SCIENTIFIC

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:

 Sound Measurement: Set the DIAL

to either Lo or Hi and read your
results on the matching scale.

 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.

 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:

 From Objects: Place the meter 40”

from the source.

 Traffic Sounds: Place the meter

40~60” above ground level.

 Indoor Sounds: Place the meter in

the center of the room.

 Intermittent Sounds: Record the

highest value at each occurrence
and compute the average.

 Fluctuating Sound: Record

several measurements and
compute the average.

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