audilo :: Hearing Protection

The ER-200 Personal Noise Dosimeter is an inexpensive, easy-to-use screening device that provides a good estimate of noise dose and alerts the user to the risk of over exposure. In cases of gunfire and other impulse noise, no conventional dosimeter measures the risk accurately because more specialized equipment is required.

The ER-200 has two modes of operation: Normal Mode measures and displays noise dose continuously for up to 16 hours, and Quick Check measures noise for two minutes, then calculates and displays the estimated dose per hour.

In Normal Mode, the dosimeter provides an early warning that the user is approaching over exposure and should use hearing protection.
Quick Check provides a quick and easy way to measure a specific noise source to determine if permissible exposure levels will be exceeded (e.g., loud equipment, vehicles, power tools, music concerts or sporting events).

Package Contents:
• ER-200 Personal Noise Dosimeter
• Windscreen
• Batteries: Three AAAA Alkaline
• User Guide
• Reference Card

Etymotic personal dosimeter

What the LEDs Mean

The dosimeter uses color-coded LEDs to display noise dose in percent.

Lights

Green (Safe): Noise dose is below 100%

Yellow (Borderline): Noise dose is greater than 100% and less than 200%

Red (High Risk): Noise dose is greater than 200%

LED Dose % Risk Factor

green (slow flash) < 25% No risk of hearing loss

green (fast flash) 25% No risk of hearing loss

green 50% 1/2 daily dose reached

yellow 100% Limit of permissible exposure

red 200% 2x allowable daily dose

red 400% 4x allowable daily dose

red 1600% 16x allowable daily dose

red 3200% 32x allowable daily dose

Technical Specifications

The default settings used by the ER-200 for calculation of noise dose are consistent with ANSI S1.25–1991 (R2002) Specification for Personal Noise Dosimeters.

Calibration Accuracy: ±2 dB
Dose Calculation Criteria:
      Exchange Rate: 3 dB
      Criterion Level: 85 dB
      Threshold Level: 75 dB
      Criterion Time: 8 hours
      Frequency Weighting: A
      Response: Slow
Temperature Range of Operation: -10°C to 45°C
Omni-directional Microphone: Flat from 100 Hz to 15 kHz
Earphone Monitor Jack (2.5 mm): 10 mV (-40 dB re 1V) corresponds to 94 dB SPL ±1 dB at 1 kHz
Frequency Weighting For Earphone Monitoring: Same as microphone (A)
Power Supply: Three AAAA batteries
RMS Detector: Dynamic range 60 dB (70 to 130 dB)
Battery Life: > 250 hours continuous use

ER-200 Personal Noise Dosimeter - User Manual 336KB