CMR3 Calibrated Measuring Receiver

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Ampetronic CMR3 Calibrated Measuring Receiver - Main Image
Ampetronic CMR3 Calibrated Measuring Receiver - Image 1
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Price:
RRP: £201.36 inc VAT
Code:
AMPCMR3
Manufacturer Code:
CMR3/ TCMR03
Brand:
Ampetronic

Quantity required:

Main Features

  • Designed for measuring the performance of audio frequency induction loop systems
  • Intended to be used as a calibrated probe with audio analysers
  • Including software based audio analysers running on portable or fixed computers
  • When used with a suitable signal source and analyser the magnetic field strength, background noise, frequency response and field distribution can be measured accurately
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CMR3 Calibrated Measuring Receiver

The CMR3 calibrated receiver is designed for measuring the performance of audio induction loop systems. The audio output is within ±0.25 dB over the frequency range and where used with a suitable audio analyser such as the Minilyser from Neutrik Ltd, the frequency response and field distribution of the magnetic field from any audio induction loop system can be plotted.

Calibrated to provide 0dBu output for a field strength of 400mA/m RMS, in accordance with the international induction loop standard IEC60118-4 it is an essential tool for anyone wishing to assess loop system performance for analyses or certification.

Product Features

  • Designed for measuring the performance of audio frequency induction loop systems
  • Intended to be used as a calibrated probe with audio analysers
  • Including software based audio analysers running on portable or fixed computers
  • When used with a suitable signal source and analyser the magnetic field strength, background noise, frequency response and field distribution can be measured accurately
  • Works in accordance with the requirements of the international defining standard EN 60118-4
  • Enables easy assessment of the system to the international induction loop standard IEC60118-4
  • Accuracy to within 0.5dB
  • Compatible with most audio analysers

 

Product Specifications

General

  • 400mA/m RMS: 0dBu audio output (0.775V)
  • Field strength: Coil orientation vertical as indicated on unit

Frequency response

  • 50Hz to 8kHz: ±0.25dB
  • 30Hz and 14kHz: -3dB
  • A-weighting filter: EN61672-1:2003 sound level meter (Switched)

Gain stability

  • Output variation over battery life: <0.1dB
  • Output variation due to loading: <0.1dB
  • Output variation over temperature range: <0.25dB
  • Overall gain variation: <0.5dB

Output

  • Output type: Active Balanced
  • Load impedance: >600Ω
  • Connector: 3.5mm stereo jack socket

Power

  • Battery: 2 x AA alkaline
  • Battery life: Approximately 200 hours
  • Battery condition: OK when LED illuminated

Physical & Dimensions

  • Dimensions: 62 w x 26 d x 112 h (mm)
  • Weight: 84g (excluding batteries)
  • Temperature range: -10°C to +45°C

 

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