General Tools and Instruments DSM8925 - Manual (Page 3)

INTRODUCTION
Thank you for purchasing General Tools &
Instruments’ DSM8925 Digital Sound Meter
with Jumbo Display. Please read this user’s
manual carefully and thoroughly before using
the instrument.
The DSM8925 uses an integrated condenser
microphone to measure the noise level of an
environment or the loudness of a machine,
typically in order to comply with health and/or
safety rules. The meter has a range of 30 to
130 dB and an accuracy of ±2 dB. Real-time
measurements are shown within a backlit
liquid-crystal display window in two forms: as
a three- or four-digit number, and as a line on
an analog bar graph.
Several features improve the meter’s
versatility. Among them are two user-
selectable operating modes: “A” or “C”
frequency weighting, and fast or slow time
response. Users also can override autoranging
(the default mode) and manually select a fixed
measurement range, improving the meter’s
response time and measurement resolution.
The meter can display the minimum and
maximum sound levels measured during a
recording session, as well as hold a maximum
level on-screen until it is exceeded.
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