8. CALIBRATION
The sound level meter is built in the internal
" Calibration VR " ( 3-10 ) on the front panel.
Please according the following procedures to calibrate
the instrument accurately, if it is necessary.
1. Prepare the optional " SOUND CALIBRATOR, model:
SC-941 or SC-942 ". Power on the Sound calibrator
& plug calibrator output into the " Electric microphone "
( 3-1 ) of the Sound Level Meter.
2. Slide the Range selector ( 3-6) to "50 - 100 dB" position.
3. Slide " Time Weighting selector " ( 3-5 ) to " SLOW "
position.
4. Slide the " A/C weighting & Calibration selector " ( 3-4 )
to " A weighting " position.
5. Carefully adjust the " Calibration VR " ( 3-10 ) with " - "
screw driver, until the display read within " 94.0 ± 0.2 " dB.
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