Rion NL-42A, Instruction Manual, Page: 56 / 154

38
Calibration
4. When calibration to 124.0 dB is completed, press the CAL key once
more to return to the measurement screen.
Note
If the bar graph upper limit setting is not 130 dB,
bring the level indication to a value that is 6 dB below
the upper limit of the bar graph scale.
Signal output for calibration of external equipment
The normal level range setting for calibration is scale upper limit 130 dB,
but for calibration of external equipment, another level range setting can also
be chosen. In this case, “xx dB” fl ashes on the calibration value indication.
The calibration value indication will always be 6 dB below the upper limit
of the level range setting.
Using the AC or DC output, calibration of connected equipment can be car-
ried out as follows.
1. Press the CAL key.
2. Use the keys to adjust the level indication to scale upper limit
−6 dB.
A calibration signal is supplied at the AC OUT and DC OUT con-
nector on the bottom panel of the unit.
3. Press the CAL key once more to return to the measurement screen.
Note
During a measurement of a quantity other than sound
level (including when a triangle symbol is fl ashing
in the top left of the display, and when the unit is
in pause mode), calibration cannot be performed.
Perform calibration after measurement is completed
(START/STOP key has been pressed).