620 Series
7
Introduction
The 620 series is a range of Integrating Sound Level Meters
designed to meet the demands of worldwide industrial health and
safety professionals as well as general noise measurement
applications fully compliant with international application and
instrument standards.
The 620 series is based on the very latest digital signal processing
(DSP) technology and has a colour TFT display with an intuitive user
interface. It encompasses functionality from basic sound level
measurement to integrating and real-time octave band analysis ,
the latter depending on the exact model.
Data is stored in a Comma Separated Variable (.csv) format,
compatible with Microsoft Office applications, and files may be
copied to a PC using a USB connection without the need for any
propriety software packages.
Instrument features
The 620 series comprises several variants, where the letters (A or B)
determine the model variant e.g. A for broadband and B for 1/1
octave band. A chargeable upgrade from A to a B model is
available. Models are available in Class 1 or Class 2 accuracy
signified by a number 1 or 2 (after the letter A or B). See Part
Numbers and Accessories later for more information.
Key features
The 620 series provides A, C, and Z frequency weightings, Fast Slow
and Impulse time weightings with cumulative storage and PC
connectivity functions. A single measurement range of 140dB RMS is standard. Simultaneous
L
Aeq
and L
Ceq
values are measured which may be used in the selection of hearing protection
using the HML method. L
avg
(used in the US) is available with a selectable threshold.
New features for 2023
New features for 2023 include audio voice notes, time history profiling and GPS location.
Frequency analysis
‘B Models’ provide integrating functionality combined with 1/1 octave band frequency
analysis. Advanced DSP processing provides fast parallel processing of octave band results
from 16Hz to 16kHz which may be displayed graphically or in numerical form and may be A,
C or Z frequency weighted.
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