Instruction manual

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Optional Accessories
Level Recorder (LR-04, LR-06)
Connection of a sound level recorder
By connecting a level recorder to the NA-27, the sound pressure level changes over time
can be recorded.
Connect the AC output on the side of the NA-27 to the level recorder, as shown above.
Recording procedure
The steps for recording the sound pressure level on a level recorder are shown below.
Turn the power switch of the NA-27 on and perform the preparation steps as described in
the section "Preparations" on page 16.
For information on how to operate the level recorder, refer to its instruction manual.
The description below applies to recording main channel data.
1. Press the CAL key on the NA-27 to activate the calibration mode.
2. Activate paper feed and pen operation of the level recorder.
3. Adjust the level control (Level ADJ) of the level recorder so that the pen registers
-6 dB.