B&K 2250 Light Manual do Utilizador descarregar pdf (Página 258)

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

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

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

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

, 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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