Meter specifications (PCE-428)

Measuring range

25 ... 136 db(A)

Accuracy

Class 2

Frequency range

20 Hz ... 12.5 kHz

Standards

GB/T 3785.1-2010

GB/T 3785.2-2010

IEC 60651:1979

IEC 60804:2000

IEC 61672-1:2013

ANSI S1.4-1983

ANSI S1.43-1997

Frequency analysis

1/1 Octave band filter: 20 Hz ... 8 kHz

1/3 Octave band filter: 20 Hz ... 12.5 kHz

Microphone

1/2"

Microphone Class: 2

Sensitivity: 40 mV/PA

Frequency range: 20 Hz ... 12.5 kHz

Connection: TNC

Power supply: ICCP Standard

Data-logging interval

1 s ... 24 h (adjustable)

Measuring functions

LXY (SPL), LXeq, LXYSD, LXSEL, LXE, LXYmax, LXYmin, LXPeak, LXN

X = Frequency weighting: A, B, C, Z

Y = Time weighting: F, S, I

N = Statistics in %: 1 ... 99 %

Frequency weightings

A, B, C, Z

Time weightings

Fast (F) 125ms, Slow (S) 1 sec, Impulse (I) 35 ms

Inherent noise

Microphone: 20 db(A), 26 db(C), 31 db(Z)

Electronics: 14 db(A), 19 db(C), 24 db(Z)

AD converter

24 Bit

Sample rate

Standard: 48 kHz

LN Mode: 20 ms

Measuring display

Numerical

Bar graph

Graphical

Display

160 x 160 pixel LCD with backlight

Memory

4 GB Micro SD card

Interface

USB (Memory readable via software or directly as mass storage)

RS-232

Voltage output

AC 5V RMS

DC 10 mV/db

Alarm

Adjustable

Power supply

4 x 1.5 V AA Batteries

12 V / 1 A Power plug

5 V / 1 A USB

Battery life

Min. 10 h continuous use

Dimensions

70 x 300 x 36 mm / 2.76 x 11.81 x 1.42" (W x H x D)

Weight

Approx. 620 g / 1.4 lbs incl. batteries

Acoustic calibrator specifications (PCE-SC 42)

Frequency

1 kHz / ± 0.1 %

Sound pressure levels

94 decibels (dB) and 114 dB

Accuracy

± 0.3 dB (at 20 °C / 68 °F and 760 mm Hg / 101325 Pa)

Microphone

1/2 " and 1 " microphone opening

Standard

IEC 942 class 2

Power supply

1 x 9 V battery (block, NEDA 1604, Burgess 2U6 or similar)

Battery life

Approx. 100 hours

Environmental conditions

-10 ... +50 °C / +14 ... +122 °F

Storage conditions

-40 ... +65 °C / -40 ... +149 °F (remove battery beforehand)

Temperature coefficient

0 ... 0.01 dB / °C

Altitude effect

Reduction of approx. 0.1 dB per altitude gain from 2000 ft from the sea level up to 12000 ft or comparable changes of the atmospheric pressure (approx. at every decrease of 50 mm Hg)

Dimensions

Approx. 48 x 48 x 138 mm / 1.89 x 1.89 x 5.43"

Weight

Approx. 250 g / 0.56 lb