Etymotic ER•200 Personal Noise Dosimeter - Manual (Page 5)

6 7
Operating Instructions
Note: Use the foam windscreen when measurements are made outdoors. Do not blow into the
microphone opening because incorrect noise dose readings will result.
Normal Mode (Daily Dose) Test Time: Up to 16 hours
Power ON:
• Press and release the power button. The red 3200% LED is stead y,
followed by one LED sweep.
• The previously measured dose displays for about 10 seconds while the
red 3200% LED remains steady.
• If the previous dose was 3200%, the red 3200% LED flashes.
• When the red 3200% LED turns off, a slow flashing of the green 25%
LED begins, indicating the start of the measurement.
• The dosimeter continuously displays the current dose, indicated by a
flashing LED.
• After 16 hours, the accumulated dose is displayed for about 8 minutes.
• During the display period, the red 3200% LED is steady and the
flashing LED indicates the dose. In cases where the accumulated
dose is 3200%, the red 3200% LED flashes.
• At the end of 8 minutes, the dosimeter automatically shuts off.
• The dose is stored in memor y and is displayed when the device is
powered on again.
Power OFF:
• To power off the dosimeter prior to its automa tic shutdown: Press and hold
the power button until a pair of lights flashes (about 3 seconds) then release
the button.
• Wait 5 seconds before powering ON again.
Interpreting Results — Normal Mode
Operating Instructions
(continued)
Quick Check (Estimated Hourly Dose) Test Time: 2 minutes
Note: Use the foam windscreen when measurements are made outdoors. Do not blow into the
microphone opening because incorrect noise dose readings will result.
Power ON:
• Press and hold the power button for 5 seconds . The red 3200% LED
is steady, followed by several LED sweeps. Release power button.
• The previously measured dose is displayed for about 10 seconds while
the red 3200% LED remains stead y.
• When the red 3200% LED turns off and the green 25% LED flashes,
the two-minute Quick Check starts.
• After 2 minutes, the steady red 3200% LED indicates the test is over.
• The flashing LED indicates the estimated dose per hour.
•
During the display period, the red 3200% LED remains steady, unless
the estimated dose is 3200%, then the red 3200% LED flashes.
•
The estimated dose per hour displays for 1 minute, then the
dosimeter shuts off.
•
The dose is stored in memor y and is displayed when the device is
powered on again.
Power OFF:
• To power off the dosimeter prior to its automa tic shutdown: Press and
hold the power button until a pair of lights flashes (about 3 seconds)
then
release the button.
• Wait 5 seconds before powering ON again.
Interpreting Results — Quick Check (2-minute test)
LED Dose % Risk Factor Hearing Protection Needed
green (slow flash) < 25% No risk of hearing loss NO
green (fast flash) 25% No risk of hearing loss NO
green 50% 1/2 daily dose reached NO
yellow 100% Limit of permissible exposure YES
red 200% 2x allowable daily dose YES
red 400% 4x allowable daily dose YES
red 1600% 16x allowable daily dose YES
red 3200% 32x allowable daily dose YES
Muffled hearing and
ringing in the ears is
likely after unprotected
exposure
If the LED color is: The estimated dose The estimated dose
per hour is: per 8 hours is:
green (slow flash) < 25% < 200%
green (fast flash)
25% 200%
green 50% 400%
yellow 100% 800%
red 200% 1600%
red 400% 3200%
red 1600%
red 3200%