CESVA SC-30, Руководство пользователя, Страница: 33 / 76

SC-30
User’s Manual
31
3.2 Making a recording
A recording consists of making a measurement and storing a series of functions in the
memory with defined periods. These functions and the periods are specified in the recording
configuration. The recordings in sound level meter mode are configurable. The main
difference between the different kinds of recording lies in the “number of functions / storage
time” ratio (see
3.3). The spectrum analyser mode has only one kind of recording.
Before beginning a recording, make sure no measurement is in progress ( ).
Begin a recording by pressing . The screen will display the kind of recording together
with the register number. The functions selected in the kind of recording will be periodically
stored in the memory until you terminate the recording by pressing
.
During the
recording process, the measurement in progress icon ( ) will flash on and off.
3.3 Kinds of recording
3.3.1 Recording in sound level meter mode
The option SETTINGS SLM RECORDING configures the periods and the functions that
SC-30 stores in the memory while recording in sound level meter mode. Four possibilities
exist:
•
ALL each second: this saves all the functions measured in sound level meter mode (see
3.1.) second by second.
•
F1, F2 AND F3 each second: this saves the 3 programmed functions on the preferential
screen second by second.
•
F1 each second: this saves the main programmed function on the preferential screen
second by second.
The 3 types of recording are intended for measurements of short duration periods.
•
L
T
and partial percentiles every T seconds: this saves every T seconds (integration
time) the equivalent continuous level with A, C and Z weighting together with the partial
percentile levels corresponding to 1, 5, 10, 50, 90, 95 and 99 % of the T seconds interval
with frequency weighting A.
This kind of recording is designed for measurements of long duration, such as environmental
noise or traffic noise studies.
The following table shows the memory storage capacity of the different kinds of sound level
meter mode recordings.
Type of recording Storage capacity
ALL each second 1 hour 23 minutes
F1, F2 AND F3 each second 33 hours 37 minutes
F1 each second 78 hours 28 minutes
L
T
and partial percentiles every T seconds
T= 1 s 11 hours 12 minutes
T= 1 min 28 days
T= 5 min 4 months 20 days
T= 1 hour 4 years 8 months