1/1 Octave ( 11 bands )

16 Hz, 31.5 Hz, 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1 KHz, 2 KHz, 4 KHz, 8 KHz, 16 KHz

1/3 Octave ( 34 bands )

10 Hz (ST-105D), 12.5 Hz, 16 Hz, 20 Hz, 25 Hz, 31.5 Hz, 40 Hz, 50 Hz, 63 Hz, 80 Hz, 100 Hz, 125 Hz, 160 Hz, 200 Hz, 250 Hz, 315 Hz, 400 Hz, 500 Hz, 630 Hz, 800 Hz, 1 KHz, 1.25 KHz, 1.6 KHz, 2 KHz, 2.5 KHz, 3.15 KHz, 4 KHz, 5 KHz, 6.3 KHz, 8 KHz, 10 KHz, 12.5 KHz, 16 KHz, 20 KHz (ST-105D)

Function

Noise’s real-time octave and 1/3 octave spectral analysis and integrating measurement

Frequency weighting

Parallel (simultaneous) A, C, Z. The spectral analysis interface is composed by the frequency spectrum. The total analysis interface is realized by digital filtering

Filter type

Parallel (real-time) octave and 1/3 octave band filter, G=2, digital filter. The noise exposure (E)’s measuring range is 0 – 65.535 Pa2h

Measurement parameter

Lxyp, LAFp, LAFmax, LAFmin,LAF5, LAF10, LAF50, LAF90, LAF95, SD, LAeq1s, LAeqT, LAE, LAfeqT, LD, LN, LDN, Lxyi, Lxeq1s, LxeqT,  E, Cpeak+, Cpeak-,  Lfmeq1s, LfmeqT , Cpeak

Applications

Environmental noise measurement

Machine’s noise analyses

Noise spectrum analyzer

Display

LCD with back light (240 x 160 dots)

Statistic analysis

Yes

24H measurement

Yes

Integrating

Yes

1/1 OCT

Yes

1/3 OCT

Yes

128 records storage

Yes

IEC 61672-1:2002 Class 1

ANSI Si.4 Type 1

CNS No. 7129 Type 1

JJG-188:2002 Class 1

Yes

IEC 61260-1995 Class 1

Yes

Display refresh

10 Hz for value; 1 Hz for graph

Microphone

½” pre-polarized condenser microphone build in preamplifier

Sensitivity : 50 mV/Pa

Frequency range : 10 Hz – 20 KHz

Heat noise : < 16 dB(A)

Measurement range

25 dB – 140 dB (A)

30 dB – 140 dB (C)

35 dB – 140 dB (Z)

Dynamic range

>  90 dB

Instrument background noise

<  13 dB (A),  15 dB (C), 25 dB (Z)

Maximum Peak C sound level measurement

50 dB – 143 dB

Time weighting

Fast, Slow, Impulse, PeakC+, PeakC-

Frequency weighting

A / C / Z

Integrating time

1 second – 24 hour, set in a given range or randomly

Frequency range

10 Hz – 20 KHz

Range gain

- 10 dB, 0 dB, 10 dB, 20 dB, 30 dB, 40 dB

Range error

Self-generated noise voltage

< 4µV (1 Hz – 23 KHz)

Measuring voltage range

15 µV – 10 Vrms

Sampling frequency

20.8 µs (48 KHz)

Analog output

A C

Starting time

< 10 seconds

Interface

USB  interface, mini B type, complying with USB 1.1, compatible with USB 2.0 which can transfer the measuring result to PC and transfer the data to the flash disk up to 8 G

Power

1.5V x 4 alkaline batteries

External power

AC 100 – 240V to DC 5V

Dimension

285 x 90 x 39 mm (L x W x H)

Weight

500g including batteries; 2.5 kgs including packaging