Rion NL-21 - Page 155

143
Specifications
(7 ranges when optional 1/1, 1/3 Octave Filter Card NX-21SA or optional
Universal Filter Card NX-21VA is ON)
10 to 70 dB (selectable only when NX-21SA or
NX-21VA is ON)
20 to 80 dB
30 to 90 dB
40 to 100 dB
50 to 110 dB
60 to 120 dB
70 to 130 dB
Frequency range
Overall characteristics including microphone:
NL-21: 20 to 8000 Hz NL-31: 20 to 20000 Hz
Electrical circuit characteristics (AC output):
NL-21: 10 to 20000 Hz NL-31: 10 to 20000 Hz
Electrical circuit characteristics (detector):
NL-21: 10 to 20000 Hz NL-31: 10 to 20000 Hz
Frequency weighting A, C, FLAT
RMS detection Digital processor
Characteristics: Fast, Slow, Impulse*
* Impulse is selectable only for auxiliary processing
functions
Calibration
Electrical calibration with 1-kHz sine wave signal from built-in oscillator
Calibration using sound calibrator or pistonphone
Back-erase function
Pause key can be set to erase data from preceding 5 seconds
Processing functions
Digital processing
Sampling interval
NL-21: 30.3 µs (L
eq
, L
max
, L
min
, L
E
)
100 ms (L
N
)
NL-31: 20.8 µs (L
eq
, L
max
, L
min
, L
E
)
100 ms (L
N
)