Quest Engineering 215 - Battery Replacement

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Measurement AveragedBA Maximum
Duration {C) Measured ExposureTime (T}
1 Hr. 92 6
1 Hr, 100 2
4 Hrs. 90 8
2 Hrs, 83
It is a._samed that tbe aoise levelsremain relativelyconstant
during tbe intervals between mcasurenwnL_. Some jud_nont Inuy be
required in making such an assumptiom
Substittlting those values in tile fornluhl gives tile following
result:
1 Hr @ 92 dBA = 1/6; 1 lh. @ 100dBA = 1/2;
,t llrs @ 90 dBA = d/8; 2 Hrs @ 83 dBA = 0.
Summing the exposure fractions yields
1/6 + 1/2 +,I/8 + 0 = 1.17
Since 1,0 is the maximum allowable value, the conll)tt[iltioll
indicates tbat workers ill this area were ovm'-exposed by 17%.
It is obvious that in a changing noise environment the above
procedure call be very coml)lex, tiMe.consualhlg, costly, In such on.
vironments it is suggested that tile Quest M.7 Noise Dosimeter be
used rather titan a sound level meter, The M-7 automatically accuam.
lutes all variations in noise and produces a continuous readout of tile
percentage of permissible exposure, No operator or calculations are
required.
BA'I'rERY REPLACEMENT
Batteries should be replaced whenever a battery test gives a low
indication on tim meter, To replace batteries, remove tile rear cover
plate by talscmwing tbe retaining screws. The batteries are located in
the upper section of the unit. Carefully remove the used batteries
and replace them with two itew 9-volt batteries, Bttrgess 2U6 or
equivalent.
CAUTION
Tile batteries must be replaced with tile ON-OFF-flAT switch
in tbe OFF position to avoid possible damage to tile unit.
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