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5. CALIBRATION PROCEDURES
① Make the following switch
settings:
Frequency weighting: A-weighting
Time weighting: FAST
Level range: 50 ~100dB
②Insert the microphone housing carefully
into the 1/2 inch insertion hole of the
calibrator（94dB @ 1kHZ）.
③ Turn on the switch of calibrator and
adjust the CALL potentiometer of the
unit 94.0dB is displayed.
NOTE: All products are well calibrated
before shipment. Recommended
recalibration cycle: 1 year.
Acoustic Calibrator
REC
FAST
A/C
DC 9V
OUTPUT
CAL
6. MEASUREMENT PREPARATION
① Remove the battery cover on the back
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