4
SW-BA-e-2020
1.
Introduction
1.1 General description
The new measuring instruments
SW 1000/ SW 2000
are upgrades of a new generation
of octave sound meters according to the market requirements for the basic instrument
SW 1000/200, which meets the requirements of the IEC standard as well as the
Chinese GB/T standard for 1/1 octave measuring instruments.
The SW 1000/ SW 2000 is a digital sound pressure measuring instrument developed
and produced by the Kern company. The high-precision 24-bit A/D converter makes
the instrument the ideal choice for various measurement tasks, for example, for
measuring environmental noise, vehicle noise and for industrial applications.
The new types contain two cores (DSP+ARM) in a single chip ARM with floating point
display and instead of the fixed point calculation a floating point calculation, which
significantly improves accuracy and stability. The redesign of the analog front-end
circuit also reduces the background noise and increases the linear measuring range
of the product. The newly developed algorithm has only one measurement range with
a dynamic range of more than 120 dB, but still meets the standard.
SW 1000
is a
class 1
measuring instrument and the
SW 2000 is
a
class 2 measuring
instrument
.
1.2 Applications
⚫
Simple noise measurement
⚫
Determination of environmental noise
⚫
Product Quality Control
⚫
Evaluation of technical measures
for noise reduction
1.3 Functions
⚫
Class 1 (
SW 1000
) and Class 2
(SW 2000)
Sound pressure measuring device
⚫
Complies with IEC 61672-1:2013, ANSI S1.4-1983 and ANSI S1.43-1997
⚫
1/1 octave according to the standards IEC 61260-1:2014 and ANSI S1.11-2004.
⚫
Linearity range: 20 dBA to 134 dBA (
SW 1000),
25 dBA to 136 dBA
(SW 2000
)
⚫
Dynamic measuring range over 123 dB for model
SW 1000
and 122 dB for model
SW 2000
.
⚫
Frequency weighting: A/B/C/Z. Time weighting: fast/slow/pulses
⚫
3 profiles and 14 user-defined measurements are calculated in parallel with different
frequency/time weightings.
⚫
Calculation of SPL, LEQ, Max, Min, Peak, SD, SEL, E
⚫
LN statistics and display of the time curve
⚫
User defined integral period measurement, integral period up to 24 hours.
⚫
Wide frequency response, high dynamic range and low background noise due to
high-speed ARM core with floating point unit
⚫
4G-Micro SD card (TF card) as mass storage