Larson Davis System 824 Training Manual

6-46 System 824 Training Manual 2/19/98
This menu item defines the mini-
mum time period that the SPL level
must be above the established thresh-
old level before it will register it as
an exceedance. With the “Excd
Threshold” set to 85dB and if we
establish a “Min Duration” of 5 sec-
onds, the 824 will log an exceedance,
in the exceedance history, when the
SPL level is above 85dB for a time
period at least 5 seconds long. Let’s
set the “Min Duration” to 5 sec-
onds.
Step 13 Now, press u or d to highlight “Min
Duration”.
Step 14 Press c to enter the “Min Duration” menu.
Step 15 Use u and d increment through “Min
Duration” values. l and r toggles
between the three numeric fields. Enter 5 sec-
onds. Then press c.
Step 16 Next, push u and d to highlight “Excd
Time-Hist”. With this menu item set to “Yes”,
a time history of the event will be saved when

Larson Davis System 824 Specifications

General

Brand	Larson Davis
Model	System 824
Category	Measuring Instruments
Language	English