B&K 2250 Light Manual de usuario Pagina 258

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246
Hand-held Analyzer Types 2250 and 2270 User Manual
A.15 L
den
Periods
Note: If Evening Start is set between Night Start and Day Start, then the L
evening
parameter
will be undefined.
A.16 Occupational Health
Table A.15 L
den
Periods parameters
*
*. For Enhanced Logging (BZ-7225) templates and microphone input only.
Parameter Values Comment
Day Start 00:00:00 to 23:59:59 Determines the start of the day period for the
L
day
calculation
Evening Start 00:00:00 to 23:59:59 Determines the start of the evening period for
the L
evening
calculation
Night Start 00:00:00 to 23:59:59 Determines the start of the night period for the
L
night
calculation
Evening Penalty 0 to 20 dB The Evening Penalty will be added to L
evening
when calculating L
den
Night Penalty 0 to 20 dB The Night Penalty will be added to L
night
when
calculating L
den
Table A.16 Occupational Health Parameters
*
Parameter Values Comment
Exposure Time 00:01:00 to 1.00:00:00 Set the Exposure Time to the actual time that
you are exposed to noise during a workday.
Used for calculation of L
ep,d
and L
ep,d,v
.
Note: Exposure Time can be changed after
the measurement has been done
Reference Time 00:01:00 to 5.00:00:00 Set the Reference Time as required for
calculation of Sound Exposure Level or Time
Weighed Average with a reference time other
than 8 hours.
Used for calculation of L
ep,d,v
and TWA
v
Threshold Level 0 to 140 dB Any sound levels below the threshold value do
not contribute to the Dose measurement data.
The time resolution for this calculation is 1 s
for calculation of Dose and ProjDose – and
10 ms for calculation of TWA, TWA
v
, DoseUQ
and ProjDoseUQ.
Used for calculation of Dose, ProjDose, TWA,
TWAv, DoseUQ, ProjDoseUQ.
U = Time Weighting for Lav: F or S
Q = Exchange Rate for Lav: 4, 5 or 6 dB
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