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 such as Radio Shack)
Identification of Parts

Battery Insertion
On the back side of the dosimeter, locate the arrow on the battery compartment.
- Press down and slide the cover off
- Insert three AAAA batteries (supplied)
- Replace cover