!
Effect of Vibration; When the sound level meter with attached
mieropbone is placed on a surhlce having an acceleration of 0.1g, the
:_ highest meter indications not influenced by background noise are ,19
dBA at 63 Hz. 72 dl:IA at 250 Ilz, mid 83 cll:IAat I000 IIz. A similar
+;
test with the microphone replaced with an equivalent impedance
I
:.,iolds]1o meter indication,
' Batteries: Two NEDA 16{),t standard type 9V transistor radio
[ battery, Burgess 2U6, Eveready 216, or equivalent. Olmrating life is
approxin_ately 70 hours, (Battery life is affected by temperature --
! '*vhic]l depellds oil bilLtery tlsed. Collsult nmrmfacturer's data for
specific battery at ,I nlil]iaiilpdrain level. Cold temperatures at freez-
ing or below greatly reduce effective battery life.)
Tripod Mount: 1/,1.20 threaded insert in rear cover accepts
standar_d t-l_il)O_lmortaring screws.
Dimensions: Case: 6 x 2-1/2 x 1-5/8 inches
Overall: 7 x 3 x 2-1/8 inches
Weight: 19 ouilces including batteries.
Construv!,iol__!:Solid state integrated circuitry iri rugged alumin-
um housillg.
ACCF,SSOI_.|ES
Aeeessm'ies awfilahle for use with the 215 meter include the
OB-,15 Octave Braid FilLer Set, CA-12 Calibrator, EC.9A Earphone
Coupler, Pli-35 Peak Ilohl Module, ItA-10OMV Recorder Adaptor,
WS-3 Windscreen, and TP-1 Tripod.
CONTIIOLS
ON-OFF-BAT Switch -- A 3-position rocker switch to turl'L ill-
strument on and off and to check battery condition.
FAST-SLOW Switch -- A 2-position rocker switch to select fast
or SlOW illeter resi)onse,
dB RANGE Switch --A 10*position rotm'y switch, graduated in
10 dB increments from ,10 to 130, to select sotlnd level range.
WEIGIITING Switch - A 5-position rotary switch to select A,
B or C scale weighted response, or tIN (linear -- no weighting)
response. In tile EXT {external) position tile switch provides for
tislng tileO1]-,t5 Octave Band FilLer and the PII,35 Peak field Meal-
tile with the sound level meter,
3
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