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Svantek SVAN 977A - Page 127

Svantek SVAN 977A
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127
SVAN 977A User Manual
Integration Period consists and stops the measurement
cycle.
Grad +
Type of trigger that starts the 1-second measurement/
integration under the condition: value of the RMS result
(Source) integrated during 0,5 ms is greater than the
threshold level (Level) and the gradient of this Source is
greater than the threshold level (Gradient). In other
cases, the instrument continues checking the trigger
condition every 0,5 mc. During one measurement cycle
the instrument performs as many 1-second integrations
as many seconds the Integration Period consists and
stops the measurement cycle.
This type of trigger has the same logic as Level + trigger,
but the trigger condition requires also gradient level to be
exceeded.
Chapter
5.2
External
Type of trigger that starts the measurement/integration
when the trigger signal appears on the I/O socket of the
instrument. After the measurement/ integration start from
the trigger, the measurement/integration will continue by
the Integration Period.
Chapter
5.2
Source
Measured result that is compared with the threshold level
(Level) for triggering RMS measured in the first profile:
Leq(1) in sound modes and RMS(1) in vibration modes.
Chapter
5.2
Level
Threshold level of Source for triggering condition
fulfilment.
Chapter
5.2
Gradient
Threshold level of the Source gradient for triggering
condition fulfilment.
Chapter
5.2
RPM
Measurement
Screen that enables configuring measurement of the
rotation per minute/second. To perform the RPM
measurement the RPM probe should be connected to the
I/O socket.
Chapter
5.8
Exposure Time
Screen that enables setting a duration of worker’s
exposition to the noise. This duration is considered in
LEPd calculations.
Chapter
5.9
Appendix D
D.1.2
Statistical Levels
Screen that enables setting a boundary level (Lnn)
surpassed by the temporary noise level values in not
more than nn% of the observation period. The user can
define ten statistical levels, named from N1 to N10, to be
calculated, displayed and saved in the files together with
the main results.
Chapter
5.10
Appendix D
D.4

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