Etymotic ER•200DW8 Personal Noise Dosimeter with Data Logging - Manual (Page 46)

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The Raw Data are used by the PC Interface program for
calculations.
Text File:
The text file contains a data table documenting: Time;
Dose%; Leq; and Predicted Time and Predicted Dose%
(QuickCheck only). Values are shown for each 3.75 minute
time block. The Data Table can be used to create graphs if
desired, using a program such as Excel.
Data are recorded as fractions of an hour; data at 3.75
minutes is written as 0.062 (3.75 minutes ÷ 60 minutes =
0.062).