NSRTW_mk3
User’s Manual
3
1
Introduction
NSRTW_mk3
is the third generation of Convergence Instrument’s
WiFi™
enabled smart integrating
sound-level meter/datalogger. It includes a type 1 digital MEMS microphone, an accurate date/time
clock, a non-volatile 128 Mb recording memory and
wireless
connectivity with fast USB and
WiFi™
download (“
W”
model only).
Running on battery, it can record sound pressure levels and report them through
WiFi™
for a week.
Connected to an external USB charger it can record and report for months. Its very small size allows it
to be attached to or embedded within the monitored equipment.
The
NSRTW_mk3
includes the following features:
•
Type I precision.
•
A, C and Z weighting curves.
•
Integrating
Sound-Level Meter, records L-max, L-min and Leq levels.
•
Log interval adjustable from 125 ms (8 points per second) up to hours.
•
Individual Manufacturer’s Certificate of Calibration from Convergence Instrument provided with
every instrument purchased.
•
WiFi™
connectivity to report measured levels remotely and automatically at preset intervals
(
“W”
model only).
•
Email alarms for sound detected over specified threshold, as well as low-battery.
•
Digital very sensitive MEMS microphone (30 dBA typical noise floor).
•
Completely sealed weatherproof enclosure designed for outdoors applications.
•
All-digital design.
•
Ultra-stable sensitivity (field recalibration is easily done, but seldom required).
•
Very low sensitivity variation due to temperature changes.
•
Very low sensitivity to vibrations.
•
Software function calculates global Leq and/or dose, according to ISO and OSHA methods.
•
Adjustable response time.
•
Preprogrammed recording start date/time.
•
Integrated oscilloscope function that can show the acoustic signal in real time.
•
Integrated spectral analyzer function that can show the spectrum (or 3
rd
-octave bands) in real
time.
•
Can be used as a high-quality USB digital microphone.
•
Allows the observation of recorded levels while the recording is ongoing.
•
Works standalone, or USB connected.
•
Long life internal rechargeable battery that recharges from USB and most USB chargers.
•
Can be field-calibrated.
•
Observes and records 100% of the acoustic signal (no missed samples).
•
Editable individual custom ID for easier instrument management.
•
All settings are stored in non-volatile memory. So the instrument will regain full functionality
and
WiFi™
connection from hard-reset or battery loss.
•
Compatible with Convergence Instrument’s Cloud service.
2
Applications
•
Sound level and acoustic dose measurement and recording.
•
Monitoring of safe working conditions.
•
24/7 monitoring of construction noise.
•
Email Alarms when the noise is too loud.
•
Activity detection and logging.
•
Long-term measurement and recording of acoustic levels for environmental impact studies.
