Svantek SV 971A, Руководство пользователя

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SV 971A User Manual
75
LEQ detector
Following LEQ detectors are available in the instrument: Imp. , Fast and Slow .
Dosimeter specific parameters can be set in accordance with the OSHA HC
(Occupational Safety and Health Administration - Hearing Conversation),
OSHA PEL (Occupational Safety and Health Administration
– Permissible
Exposure Level) and ACGIH standards.
Criterion Level is a steady noise level permitted for a full eight-hour work shift :
60dB , 65dB , 70dB , 75dB , 80dB , 84dB , 85dB , 87dB , 90dB ;
Threshold Level is a noise level limit below which the dosimeter does not
accumulate noise dose data : None , 60dB , 65dB , 70dB , 75dB , 80dB , 85dB ,
90dB ;
Exchange Rate is an amount by which the permitted sound level may increase
if the exposure time is halved : 2 , 3 , 4 , 5 , 6 ;
ULT Threshold Level (Upper Level Time) is a threshold level for calculation of
the ULT results: 70dB
÷
140dB ;
PTC Threshold Level (Peak Threshold Counter) is a threshold level for
calculation of the PTC results: 70dB
÷
140dB .
11.4 C
HECKING MEASUREMENT RANGE
–
R
ANGE
The measurement range for the Dosimeter function is
set to Normal and you cannot change it. The detailed
description of the measurement range parameters is
given in Appendix C.
<ENT>
11.5 S
ETTING EXPOSURE TIME
–
E
XPOSURE
T
IME
The Exp. Time position enables setting the desired
value of the workday exposure time which is used for
calculation of the
LEPd results (see Appendix D).
<ENT>
11.6 S
ETTING ALARM THRESHOLDS FOR DOSE METER RESULTS
–
A
LARM
The Alarm position is active only in the Dosimeter
function and enables programming the alarm thresholds
for three profiles (
Thresh. P1 (2,3) ).
Thresholds can be set for next measurement results of
the
Dosimeter in ranges:
<ENT>
DOSE
: 1÷200%;
D_8h
: 1÷200%;
PTC
: 1÷1000;
ULT
: 1÷60s.
If Off is selected, the alarm for the measurement result
is switched off.
<ENT>