DVM1356 SOUND LEVEL CALIBRATOR
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(6) Place the Sound-level calibrator over the microphone of the
sound-measuring instrument being calibrated.
(7) Set the LEVEL RANGE control on the instrument being tested to
the range with 100dB as its upper limit if 94dB was selected on
the Sound-level calibrator. If 114dB was selected on the Sound-
level calibrator, choose a range with an upper limit of 120dB. The
instrument may be set to FAST or SLOW response and C or A
weighting.
(8) Read the level on the instrument being tested and adjust the
sensitivity control for the correct indication of the Sound-level
calibrator level selected in step.
(9) When the calibrator is not in use, please switch it OFF to save the
battery.
CAUTION
Ambient sources of noise or vibration can cause a false calibration
indication, this can be especially significant at the lower 84dBA
level.
