Etymotic ER•200DW8 Personal Noise Dosimeter with Data Logging - Manual (Page 15)

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Reading the Display:
What the LEDs Mean
LED Color
The dosimeter uses color-coded LEDs to display noise dose
in percent.
Green (Safe): Noise dose is below 50%
Yellow (Borderline): Noise dose is
greater than 50% and less than 100%
Red (High Risk): Noise dose is greater
than 100%
LED Flash Rate In Normal mode:
· A slow flashing LED at 12.5% means that the noise dose
is at or below 12.5% (i.e., between 0% and 12.5%). A
fast flash at 12.5% indicates the dose exceeds 12.5%
(i.e., dose is between 12.5 and 25%)
· LEDs 25% to 4x flash rapidly when that dose level is
exceeded
· For the bottom LED (8, 16, 32x):
- Regular flash: dose exceeds 8x
- Double flash: dose exceeds 16x
- Fast continuous flash: dose exceeds 32x
In QuickCheck mode:
· All LEDs are solid except the bottom LED, which flashes
green to indicate QuickCheck mode.
· If dose per hour exceeds 8x the bottom LED flashes
alternately red and green.