Midas Safety Services Ltd
PAT Testing        Software                 Training                Cirrus Sound Level Meters

Telephone : 01454-632967                            Fax: 01454-633832
 Enquiries: chrisgray@midaselectronics.co.uk            PAT Testing, or Training  pat-testing@midaselectronics.co.uk
 

CR:270 Series of Integrating Sound Level Meters

The CR:270 series is a range of instruments designed for the measurement of industrial and environmental noise levels. The main application for the instruments is to measure noise levels for compliance with Noise at Work regulations.

The instrument are capable of measuring Leq (Average Noise Level) and Peak levels, with the parameters being calculated simultaneously. The CR:272 and CR:271 instruments provide the measurement of both A and C weighted levels, allowing the prescription of hearing defenders using the HML method. The CR:274 and CR:273 instruments have the addition of internal octave band filters and dB(Lin), which allow the use of the Octave Band method for the accurate selection of hearing protection.

The units provide a range of features including:

Type 1 or Type 2 versions

Simultaneous measurement of Leq, Peak (C) and SPL

dB(A) for Leq & SPL, dB(C) for Peak

dB(Lin) for Octave Bands on CR:274 and CR:273

AC & log DC Outputs

Maximum Hold for SPL

'F' (Fast), 'S' (Slow) & 'I' (Impulse) response for SPL

Full range of accessories available

Specifications
Standardisation CR:272 Type 2 of IEC 60651 & IEC 60804
CR:271 Type 1 of IEC 60651 & IEC 60804
CR:274 Type 2 of IEC 60651 & IEC 60804, Octave Band Filters to IEC 61260
CR:273 Type 1 of IEC 60651 & IEC 60804, Octave Band Filters to IEC 61260
     
Measurement Range CR:272 32 dB(A) to 140dB(A), 50dB(C) to 140dB(C)
CR:271 27 dB(A) to 140dB(A), 50dB(C) to 140dB(C)
CR:274 32 dB(A) to 140dB(A), 50dB(C) to 140dB(C)
CR:273 27 dB(A) to 140dB(A), 50dB(C) to 140dB(C)
All instruments 60dB(C) to 143dB(C) Peak
     
Frequency Weighting CR:272 & CR:271 dB(A) & dB(C) to IEC 60651
CR:274 & CR:273 dB(A) and dB(Lin), 10 Octave Bands
     
Time Weighting All Instruments Fast, Slow, Impluse to IEC 60651
   
Display 3 1/2 Digit LCD with Overload & Battery
Outputs AC and Log DC
     
Size & Weight CR:272 & CR:274 255mm x 75mm x 25mm, 380 gms
CR:271 & CR:273 325mm x 75mm x 25mm, 430 gms
Power All Instruments 2 x 6LR61 (9v PP3)