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SVAN 971 User Manual
33
Threshold level
The threshold level of the triggering signal (
Level
) can be set in the range from
24 dB to 136 dB. The instantaneous value of the LEQ result measured with the
Filter
and the
Detector
constant selected for the first profile (
path: <Menu> /
Measurement / Profiles
) compares with the
Level
value every 0,5 milliseconds.
Speed of Source value changing
This position appears when the
G
trigger is chosen. The speed of the
Source
value changing (
Gradient
) can be set in the range from 1 dB/ms to
100 dB/ms.
5.3 S
ETTING PARAMETERS FOR PROFILES
–
P
ROFILES
Parameters for three profiles can be set in the
Profiles
list (in case of
Lev. Met.
function) or in the
Profile x
lists
(in case of
Dosimeter
function).
Following parameters can be programmed independently
for each profile: weighting filters
for other than peak
results
calculations
(
Filter
), weighting filters for peak
results calculations (
Filter Peak
) and LEQ detectors type
(
Detector
).
<ENT>
Weighting filter selection
Next weighting filters for both
Filter
and
Filter Peak
positions can be selected:
•
Z
class 1 according to IEC 61672-1:2013 standard,
•
A
class 1 according to IEC 651 and IEC 61672-1:2013 standards,
•
C
class 1 according to IEC 651 and IEC 61672-1:2013 standards,
•
B
class 1 according to IEC 651 standard,
•
LF
low frequency filter according to China requirements.
LEQ detector selection
Available LEQ detectors (time constants):
Impulse
,
Fast
and
Slow
.
Time constants are applied always to the
Lmax
,
Lmin
,
L
(SPL),
Ltm3
and
Ltm5
results and to the
Leq
,
LE
(SEL),
LEPd
and
Lden
results in the case the
Exponential
LEQ detector is selected in the
General Settings
list (see Appendix
D).
5.4 S
ETTING THE ALARM THRESHOLDS FOR DOSE METER FUNCTIONS
–
A
LARM
The
Alarm
position is active only in the
Dosimeter
function and is described in detail in the
DOSIMETER
section of this manual.
<ENT>
5.5 S
ETTING UP THE DATA LOGGING
–
L
OGGING
Main measurement results or Summary Results (
L
(SPL),
Leq
,
LE
(SEL),
Lden
,
LEPd
,
Ltm3
,
Ltm5
,
Lnn
,
OVL
,
Lpeak
,
Lmax
,
Lmin
) are measured and saved in the file with the step defined by the
Integration Period
parameter as many times as defined by the
Repetition Cycles
parameter.
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