SC310
User’s Manual
129
•
Evaluation time (T) used in the measurement of spectral and overall levels. This evaluation
is carried out in consecutive intervals of T time.
To set this parameter, select the SETTINGS
Î
MEASURING
Î
SPECTRUM ANALYSER
option from the SC310 menu.
Press the key
to begin setting the T parameter and then follow the procedure below:
•
Select your numerical value using
and
and confirm by pressing
.
Evaluation time T may be set from:
o
1 to 59 seconds (1’’ – 59 ’’)
o
1 to 59 minutes (1’ – 59’)
o
1 to 99 hours (1H – 99 H)
•
Finally, select the time units: seconds ( ’’ ), minutes ( ’ ) or hours ( H ) with the help of
and
and press
to confirm. Use
to cancel or return to the
menu.
•
If you choose "t" as your numerical evaluation time value (it lies between values 1 and 99)
the evaluation time will coincide with measuring time. This option is useful when it comes
to evaluating ideal evaluation time. To apply the option, make a measurement with
evaluation time "t" and calculate the time needed for the bands in which you are interested
to stabilise.
10.5.3 Beginning measurement
First of all, be sure that the sensitivity from the accelerometer (see 10.5.1) and the evaluation
time T (see 10.5.2) have been adjust correctly.
Then, ensure that the sound level meter has no measuring process in progress ( ). If it has
( or ), press
to stop it.
Next, set the SC310 in vibration mode and choose the screen you want to display (Graphic
Spectrum analyser 1/3 + K, Numeric Spectrum Analyser 1/3 or Numeric overall analyser with
W
m
weighted), with the following keys:
Once you have selected your screen, press
to start the measurement process.
10.5.4 Function display
The
SC310
measures all functions simultaneously.
The measured values are refreshed each time that finishes the consecutive evaluation
period, each T. Except in case that you have chose an evaluation time “t”, which will be
refreshed every second.
