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CR811C
Class 1 Sound Level Meter
- IEC 61672-1:2003 Class
1
- Type
1 to IEC 60651, IEC 60804 and ANSI S1.4
- Simultaneous Leq, SPL, Lmax, Peak and Ln's (L10,
L50, L90, etc).
- "A", "C" and "Z" (flat from
10 Hz to 20 kHz ± 1.5 dB) frequency weightings on
channel 1.
- "C" weighting on channel 2 for simultaneous Peak
measurements.
- RMS "Fast", "Slow" and "Impulse" time
weightings.
- Clear graphical display with backlight.
- Rugged cast aluminum case.
- Seven Measurement ranges, covering:
- 21 to 140 dB(A), Peak 143 dB(C).
- Noise floor 18 dB(A).
- Powered by two AA cell batteries - over 30 hours operation.
- Dimensions:
- 13.3" x 2.9" x 0.9", 15.8 ounces
- 340mm x 75mm x 25mm, 450g
- Measurements stored for display or transfer to computer
using the software provided.
- Available in a weatherproof Outdoor
Measurement Kit
- 2
to 12 Year Warranty
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This precision grade sound level meter is particularly suitable
for environmental noise measurement, including BS4142 surveys.
With its Class
1 performance, removable microphone stem (can take a microphone
extension cable), data storage and automatic timing functions it
meets most environmental applications. It is also perfectly suited
for the professional acoustician involved in noise at work applications.
Environmental and BS4142 Noise Surveys
The CR811C meter is ideal for general environmental noise surveys
and for BS4142 (mixed residential and industrial) assessments.
The ability to measure down to 21 dB(A) makes it suitable for locations
with low ambient noise levels. For this type of survey it is often
necessary to make repeating, timed measurements (e.g. measure every
15 minutes). The CR811C can be set to make such measurements, automatically
restarting and storing parameters such as LAeq, L90,
Lmax, and many others. It also stores the Leq every second, giving
a graph of the noise level over time for further reporting and
analysis.
Noise at Work Surveys
The European Noise at Work Regulations and HSE's Guidelines (Controlling
Noise at Work) require the use of at least a Class 2 Integrating
Sound Level Meter. The CR811C is a Class 1 meter and so is more
than adequate. For more information, please visit our Noise
at Work information pages.
Deaf Defier Software
The Deaf Defier software and download cable are provided at
no extra cost with the CR811C. Click
here for more information.
Additional Documentation |
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