Rion NC-74, Инструкция по эксплуатации

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7
Measurement
To make the measurement, place the units in a perpendicular position, as
shown in the illustration at left.
1. Make sure that the power switch of the NC-74 is OFF.
2. Carefully insert the microphone of the sound level meter all the
way into the coupler of the sound calibrator.
Important
The microphone of the sound level meter must always be
inserted or removed slowly and carefully, to avoid the pos-
sibility of damage to the microphone diaphragm caused by
abrupt changes in air pressure.
When mounting and dismounting the microphone and sound
calibrator, do not rotate the sound level meter or sound
calibrator. Otherwise the protective grid of the microphone
may become loose or detached, causing damage to the
microphone diaphragm.
ON OFF
PUSH