Quest Engineering 215 - Page 26

SPECIFiCATiONS
Acoustic Output
1'Trcqucncy; 1000 Hz ± 3%,
Sound Pressure Level: ll0 dB ref_,rencc 20pN/n12.
2'*cctlravy: ± 0.5 dB (23_C, 700 nun Ilg).
Temperature Range: 0 to 50°C operating, -.10 to +65°C star-
ago (batteries removed}.
Temperature Coefficient; 0 to 0,01 d B/°C,
Altitude Effects: Approxhnately 0,1 clB decrease for each 2000
foot increase in altitude fronl sea level to 12,[}00 feet elevation, or
comparable atmosplmric pressure chnngc (approximately avery 50
nnn of I lg decrease).
Oeaend
Power Source: Two 9V tr;msistor hatterit,s NEI)A I(i0,1,
Btlrgc_ 2U6 or cquiwllmlt. Battery life appra.Xinlately 100 hours.
Operating Temperature: 0° to 50_C,
Construction: I{tlgged ldUlllilltlal housing.
Case Size: ,I inelms by 2-3/8 hlehes dhuneter.
Weight: 13 oz. including Imlterics.
OPI_IIA'rlON
The CA-12 Calibratm. is designed Io check the accurtlcy of
Illaay typs of SOtllltl illstrtllll(_llI.S, llOt only Qtlest nlallll['aCttlriJd
equipnlent. Quest izlstrtlnlents colllnlonly Use Lilt,standard 1.1/8-hlch
dianteter ceramic nlierophone which fits directly into the calibrator
coupler cllvity. For other nlicraphones with smalk,r diam(_ters, nn
adlllltor Illtlst he tlsed, The next nlost COlllnlDII sizl2 lllierol)holle iS
tile 1-inch (actually 15/lfi inch). When testing all hl..itl'tlllloa[, wiUI a
l-inch microphone, tile adaptor ring (furnislled) nltlSt ['irst ht_ insert-
ed in the coupler. This keeps i1close to]o_lne¢_ fit around tht! micro-
llhone head. Bc sure tile microphone fits down inside, tile adallLor
and rests on tile lower rinl. This rim supports tile microphone and
fOrlll_ tile necessary inllel" s(21ll,
OPEIIATINCl PROCEDUIIE
NOTE
l"or calibration specifically of tile Quest model 215 or 215R
S0ulld Level Meter, see pag_ 12 of this nllllltllll,
2't