Svantek SVAN 958A - Page 34

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SVAN 958A User Manual
Time period between two writings to the logger’s file
The Logger Step defines the period of the data logging in a file. It can be set
from 10 ms to 1 s in 1, 2, 5 sequence, the values from 1 second to 59 seconds,
the values from 1 minute to 59 minute and 1 hour.
The main measurement results (depending on the sound or vibration mode measurements) can be saved in
the result files of the instrument’s memory by means of the Save or Auto Name function (path: <Menu> / File
/ Save). The structure of the files is described in App. B. In case when Int. Period is greater than 25 seconds,
it can be done also by means of the Auto Save function. The name of the file for that operation is set in the
File Name list (path: <Menu> / File / Save Options). In case the Cycles Number is greater than one, the
Auto Save operation will be performed after the period set in the Int. Period. The name of the file with the main
results is changed after each saving.
In the same, when the Logger is On, the partial measurement results are calculated with the Logger Step
period.
Relations between Measurement Cycle (Integration Period) and Logger Step
During measurements, from each profile of the Sound channel, the user can select up to four results (PEAK /
MAX / MIN / RMS) to be logged with logger step down to 10 ms. From each Vibration channel, the user can
select up to five results. (PEAK / P–P / MAX / RMS / VDV). Additionally, three Auxiliary results can be also
logged in this mode, namely Vector, RPM and Meteo. These results are saved in one logger file of the
instrument’s memory in the Sound or Vibration Level Meter as well as for other functions.
The name of the logger file is predefined and consists of word "Buffer" and a number, but is limited to 8
characters. For example, "Buffer1" "Buf12345" "B1234567".
The registration in the logger’s memory is stopped after the period, which is equal to Int. Period multiplied by
Cycles Number, or after pressing the <Stop> key or after stopping the measurement remotely.
time
signal amplitude
Measurements started by <START/STOP> push-button, ended by last repetition cycle
INTEGR. PERIOD
T
INTEGR. PERIOD
T
INTEGR. PERIOD
T
INTEGR. PERIOD
T
startstart
REP. CYCLE
n=1
REP. CYCLE
n=1
REP. CYCLE
n=N-1
REP. CYCLE
n=N
AUTO SAVE AUTO SAVE AUTO SAVE AUTO SAVE
0 T 2T NT(N-1)T(N-2)T
main results
integration period
from 0 to T
main results
integration period
from T to 2T
main results
integration period
from (N-2)T
to (N-1)T
main results
integration period
from (N-1)T
to NT
@sig1.svn @sig2.svn @sigN-1.svn @sigN.svn
time
time history
PEAK, MAX, MIN or RMS
LOGGER STEP
0 NT
LOGGER: ON
RMS results logged
with LOGGER STEP.
Number of results
equal NT / LS
&logger1.svn
LS
main results
files
measurements
end