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SL355-en-GB_V1.8 8/17
2. Introduction
Congratulations on the purchase of the Model SL355. The SL355 is a combination Noise
Dosimeter, Datalogger, and Sound Level Meter (SLM). The SL355 can be configured manually via
push-button navigation of the menu system or through the PC interface using the supplied software
(recommended for ease of use). Refer to the dedicated software User Guide on the supplied CD-
ROM for detailed instructions on using the software program for downloading data, configuring the
SL355 meter, and remotely controlling the meter.
The
SL355 Noise Dosimeter
is designed to test noise exposure and provide noise surveys for
compliance with OSHA, MSHA, DOD, ACGIH, and ISO standards. The SL355 monitors
accumulated noise exposure and measures frequency weighted noise exposure and peak sound
level simultaneously for % dose and TWA (time weighted average or sound exposure in dB).
Up to twenty (20) noise surveys can be recorded and up to five (5) automated dose tests can be
programmed up to 30 days in advance. Each test includes a ‘repeat’ feature where tests can be
rerun a pre-programmed number of times. Criterion Level, Threshold, Exchange rate and other
parameters are user-programmable. Noise Survey results can be viewed on the meter’s display and
downloaded using the supplied PC software.
The
SL355 Sound Level Meter (SLM)
displays real-time sound pressure level (SPL) readings
along with LEQ, SEL, and elapsed time as a typical type 2 SLM would. The SLM has selectable
measurement ranges: 60 to 130 & 70 to 140dB, ‘A’ and ‘C’ frequency weightings, Linear ‘Z’, and ‘C’
Peak weightings, Fast & Slow response time settings, and an adjustable energy exchange rate (Q).
The
SL355 Datalogger
has a built-in real-time clock for date/time stamped data records. The
datalogger can store up to 14,400 readings in the meter’s memory. Sampling time (rate) is
programmable from 1 second per reading up to 1 hour per reading. Logged readings are
downloaded using the supplied PC software.
This device has been calibrated and tested before shipment. With proper care, years of reliable
service can be expected.
Conventions of this User Guide
The SL355 is a sophisticated device with a variety of features. This User Guide is intended to
optimize the user experience with regard to ease of use and convenience.
To accomplish this, most sections of this User Guide include instructional text, a Menu table, and a
section that illustrates the actual “Screen shots” seen by the user while programming the meter.
Be sure to review all three of these approaches (instructional text, menu tables, and screen shots)
and determine if one, or a combination of the three, work best for the application at hand. If
questions arise please contact our technical support staff.
