Internal Calibration:
Slide the
POWER
selector to an ON position.
Slide the
RANGE
selector to the 50 ~ 100 dB position.
Slide the
RESPONSE
selector to FAST.
Slide the
WEIGHTING
selector to CAL.
Use the calibration screw driver to gently turn the
CALIBRATION
ADJUSTMENT
until the display reads 94.0 dB.
External Calibration:
Use Sper Scientific's Acoustical Calibrator 840031 (or equivalent) to
calibrate the unit, including the microphone, in compliance with OSHA.
Slide
POWER
selector to an ON position.
Power on the acoustical calibrator and place the calibrator onto the
Sound Level Meter's
MICROPHONE
.
Slide the
RANGE
selector to the 50 ~ 100 dB position.
Slide the
RESPONSE
selector to FAST.
Slide the
WEIGHTING
selector to "A".
Use the calibration screw driver to gently turn the
CALIBRATION
ADJUSTMENT
until the display reads 94.0.
E. PRECAUTIONS
Do not store or operate the unit in high temperatures or in a
high humidity environment for long periods.
Keep the microphone dry and avoid intense vibrations.
Do not force the
CALIBRATION ADJUSTMENT,
doing so may
damage the mechanism and void the warranty.
F. BATTERY REPLACEMENT
Replace the battery when "BAT" is displayed. Accurate measurements
may be made for several hours after the low battery indicator appears.
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