Personal Noise Dosimeter
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.
Package Contents
• ER-200 Personal Noise Dosimeter
• Windscreen
• Batteries: Three AAAA Alkaline*
• User Guide
• Reference Card
*(AAAA batteries are available at retail locations and electronics retailers)
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 (14°F to 113°F)
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