ACO Low Frequency Sound Pressure level Meter, Model 6238L
In accordance with growing environment conservation, the evaluation of environmental noise such
as traffic noise or industrial equipment noise, or better understanding of the labour health
environment at offices, factories, etc. are getting more important than ever before. On-site
measurement of environmental noise is strongly expected to have high resolution and real-time
analysing function on the spot.
Low frequency sound pressure level meter, Precision sound level meter TYPE 6238L displays its
greatest force in these cases.
In Low frequency sound pressure level meter TYPE 6238L, replacing the card with G-card enables to
measure G-weighted sound pressure level and 1/3-octave real-time analysis. This equipment is
symbolizing the next-generation sound level meter with extremely high resolution and reliability.
In Precision sound level meter TYPE 6238L, the function can be extended quite easily to those such
as measurement of various parameters, only by inserting option FFT Analysis Card into the card slot.
Part No
1) ACO Model 6238L – Low Frequency Sound Pressure Level Meter
Specification
Applicable Standards : JIS C 1514:2002 Class I
ISO 7196:1995
Frequency Range : FLAT(FLAT: 1 – 100Hz)
G-weighted sound pressure level: LG(G ISO 7196 Reference)
1/3-octave (FLAT:1 – 80Hz)
Microphone Type : (Sensitivity) TYPE 7146NL(-28dB, Stand-alone -26dB)
Frequency analysis band : 1/3-octave
1Hz, 1.25Hz, 1.6Hz, 2Hz, 2.5Hz, 3.15Hz, 4Hz, 5Hz, 6.3Hz, 8Hz,
10Hz, 12.5Hz, 16Hz, 20Hz, 25Hz, 31.5Hz, 40Hz, 50Hz, 63Hz,
80Hz, OA, AP, G
Measurement Level : G:40dB – 130dB
FLAT : 50dB – 130dB
1/3-octave : 30dB – 130dB
Overload characteristic : +3dB from upper limited scale
Time weighting : Fast, Slow, 10sec
Measurement items : LP, LG, Leq, Lmax
Measurement time : 1s, 3s, 5s, 10s, 1min, 5min, 10min, 15min, 30min, 1h, 8h, 12h, 24h Manual (Max. 199h59m59s)
Sampling Time : 20.8μs(Leq, Lmax, Lmin, Lpeq, Lpmax)，666μs(LGeq,LGmax),64ms(LN)
Data clear Function : Pause, and a function that deletes preceding 3 or 5 sec.
Memory start；Selectable Auto or Manual
Timer function : A marker can be set to start and stop the measurement at any specified moments.
Display : Liquid crystal and Backlight(128×64 points)
Display range : 4digit display
Date : year/month/day/hour：minute：second
Data Storage Functions : Sound pressure level or Processed values stored in built-in
Memory or Memory card.
Manual Storage : Sound level, Calculation value, Memory time, Store the
Sampling to Built-in memory or on Memory card.
Auto Storage : Sampling interval 100ms, 200ms, sound level,Leq etc.
Battery life (continuous time) : Alkaline dry cell ; Approx.9hours when Switch on a back
light ; Approx.1/3 Consumption ampere:150mA (6V input)
when processing function is OFF
When AC adaptor is used ; Approx.2.7VA
Operating temperature : Temperature：-10 – 50 o C
Humidity : 30%～90%RH(no condensation)
Size : 85(W) x 328(H) x 48(D)
Weight : Less than Approx.450g(including Batteries)
1/1 and 1/3-octave Real-time Analysis Card
Applicable Standards : JIS C 1514 (IEC61260) : Class I
Measurement mode : Lp, Leq, LE, Lmax (One of the measurement modes selected as above is displayed.)
Frequency analysis band : 1/1-octave filter:
16Hz, 31.5Hz, 63Hz, 125Hz, 250 Hz, 500Hz, 1kHz, 2kHz,
4kHz, 8kHz, AP, OA
1/3-octave filter:
12.5Hz, 16Hz, 20Hz, 25Hz, 31.5Hz, 40Hz, 50Hz, 63Hz, 80Hz,
100Hz, 125Hz, 160Hz, 200Hz, 250Hz, 315Hz, 400Hz, 500Hz,
630Hz, 800Hz, 1kHz, 1.25kHz, 1.6kHz, 2kHz, 2.5kHz, 3.15kHz,
4kHz, 5kHz, 6.3kHz, 8kHz, 10kHz, 12.5kHz, 16kHz, AP, OA
