Svantek SV 971A, Руководство пользователя

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SV 971A User Manual
46
The Field Compensation position enables you to
switch off (Off) the compensation filter or to select the
compensation filter for sound measurements in the free-
field (
Free Field ), diffuse field ( Dif. Field ) conditions or
for the permanent outdoor monitoring application as a
part of the
SV 271 monitoring station: Environment
(when the acoustic signal is parallel to the microphone’s
grid) or
Airport (when the acoustic signal is
perpendicular to the microphone’s grid).. By default, it is
set to
Free Field .
◄
The Windscreen position is active when the field
compensation is on and switches on the compensation
when the windscreen is applied. By default, it is
On
◄
Note: In the Simple interface mode, the Comp. Filter position is hidden, but the instrument
will use settings previously defined in the Advanced mode or default settings (Microphone:
On; Field Comp.: Free Field; Windscreen: On)
.
Note:
For laboratory instrument’s tests, the compensation filters should be set in accordance
with the Appendix C .
4.8 S
ETTING STATISTICAL LEVELS
–
S
TATISTICAL
L
EVELS
In the Stat. Lev. screen, you can define ten statistical
levels, named from N1 to N10 , to be calculated,
displayed and saved in a file as Summary Results (see
Appendix D).
Default statistical levels have following settings: 1 , 10 ,
20 , 30 , 40 , 50 , 60 , 70 , 80 and 90 . All values should be
within the integer range [1, 99]. Each value can be set
independently from others.
<ENT>
4.9 P
ROGRAMMING INSTRUMENT
’
S INTERNAL TIMER
–
T
IMER
The Timer function is used to programme the automatic start-up of the measurement at a given time and
day of a week and with the parameters set in the Measurement section.
Note: In the Simple interface mode, the Timer position is hidden, but the instrument will use
settings previously defined in the Advanced mode or default settings (Timer: Off)
.
The Timer position allows you to programme the internal
real-time clock to act as a delayed start timer. The
instrument will be switched on automatically at the
programmed time and will perform the measurement
with the same settings used before the instrument was
turned off with one exception (see below Note).
<ENT>
Note: When Timer is On, measurements will be performed from defined Start to Stop times
because the Repetition Cycles parameter will be changed to Inf (path: <Menu> /
Measurement / General Set.). The last integration may be cut.