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Rion NL-52 Sound Level Meter Manual

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Optional Accessories
Level recorder LR-07/LR-20A
By connecting a level recorder to the unit, the sound level changes over time
can be recorded.
Sound level recording
The procedure for recording sound level changes over time is described
below. Turn power to the NL-42/NL-52 and the level recorder on. The steps
described in the chapter “Preparations” (page 9) should be completed. For
details about level recorder operation, refer to the documentation supplied
with the level recorder.
1. To select the AC signal output to the recorder, press the MENU/EN-
TER key to bring up the menu list screen.
2. Use the keys to select [I/O] and press the MENU/EN-
TER key. The I/O screen appears.
3. Use the keys to select [AC OUT] and press the MENU/ENTER
key. The AC OUT setting screen appears.
4. Use the keys to select the frequency weighting characteristic
(Interlock, A, C, Z) and press the MENU/ENTER key.
5. Press the START/STOP key to return to the measurement screen.
6. To adjust the level of the recorder, press the CAL key to set the unit
to the internal calibration mode.
7. Adjust the level control (Level adj) of the level recorder so that the
pen registers at -6 dB from the top of the scale.
Sound level meter scale upper limit
-6 dB position
Recording pen
When recording range is 50 dB
… 134 …


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