Extech Instruments SL400 User Manual page 13

Noise Dose Measurement Procedures
Press the button to turn on the meter. The LCD will display the SPL (sound pressure level
icon). If SLM is showing in the lower line, Press SET and press the down arrow to change SLM
to NDM. Press the Enter button to exit setup. Press the button to enable noise dose
testing. Press the button again to pause testing. Press to stop testing.
Press the button to scroll the available test options: SPL, Dose%, LPMAX, LPMIN, PKMAX, LEQ,
SEL, LEP8, TWA8, LVAG, LN5%, LN10%, LN50%, LN90%, and LN95%.
Press the button to view the start test time and date. Press the button to change the view
from time to date and back to the time display. The time format is HH:MM:SS and the date format
is YY‐MM‐DD.
View Logged Sound Level Readings
For Sound level readings, SLM must appear on the lower line. Press and hold the button for
more than 1 sec to enter the viewing mode. Press the or button to scroll through the
readings.
Press the button to select the dose record information (Noise Dose Meter mode): Test mode,
Start Time, Test duration, Total pause time, Test end time.
Press the button to view the test start date, Press the button to view the test start time. The
time format is HH:MM:SS and the date format is YY‐MM‐DD.
Press and hold the button for more than 1 sec again to exit the logged data viewing mode.
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SL400‐en‐GB_V1.0 2/16
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