407355 Datasheet, PDF (13/17 Pages) Extech Instruments Corporation. – Noise Dosimeter with PC Interface

AVERAGE
When AVERAGE is selected the
window shown in the accompanying
diagram opens. In the AVERAGE
mode, the user selects a sampling
interval and the software shows a
value that represents the average of
all the readings taken during the
sampling interval.
The USER field can be used to personalize the data record (optional).
The DATE field is automatically filled-in with the START DATE/TIME and the
user-selected Time Interval (time between records).
The METER SET TO field is automatically filled-in with the Criterion level and
Exchange rate. If these fields do not automatically fill in, go to the EVENTS menu
item and download the EVENT register information.
The MEASUREMENT SUMMARY window automatically fills in when the test is
stopped. The RUN TIME is total test time. The SPL MAX field is highest average
reading taken during the course of the test. The DOSE field automatically fills in
the %DOSE value for the test (in noise survey mode).
OPTION
TWA (Time Weighted Average) Information Window
TWA is the 8-hour projected average sound level in dB based on data collected from the
start of the test up to the time the TWA is checked. See the information window below.
TWA is automatically calculated in the EVENTS window, discussed previously.
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407355 Version 2.4 9/07