CA-J2 CALIBI{A'rlON
The CA-12 Calibrator was precisely calihratvd in the Quest
laboratory with special zleoustiea[ hlslrunlelltation traceable to the
U.S, Bureau of Standards. The 0A-12 is v(_ry stable, but since it is
um_l to e_llibmte other equipment, it should I)e perindiclllly checked
wiih ]ahoratory standards. 1¢ is recommended that tile Calibrator be
returned [o the factory zlt [eilst ollco eaell y(_ar for recalibratioll, or
',vJleney(_rthere is a qtleStion Ill)out its 11CCtlfilcy,
MODEL RA-10OMV RECORDER ADAPTOR
(for DC Input Chart Recorders)
The Mode] RA-IOOIMV Recorder _"_)_'_ /
Adaptor converts the AC OLItl)LIL(!loc-
trical siglm] froln the Quest 2IIA,
211FS or 215 Sound Level Meters to
a DC signal for chart recording )Lit-
poses. With this adalltar mo[ule tie ___J,_
sound level meters can be used with
100 millivolt high iml_edltnee inl)ut
DC recorders for stlch jltlrl)oses as
short or long term indttstrial noise Figure 19.
nlonitorillg, scientific analysis or vehicle noise level monitoring.
RA.100MV Specifications
lnl)ut voltage: 0-1.8V RMS AC from Quest 211A, 211FS, or
215 Sottnd Level_letors.
Ou_LpuLvoltage;100 lllillix'ottsDC, adjustal)le,
Res!_onse.:Slow
Range: Approximately 25 d B
Tracking ]inearity:nelu'log;trackssaln_)as Sound LevelMeter
softie,"
Power Source: Non_, IIllssi'.'_, rllOdtlle
Size: 2 x 1-1/8 dim inches
o _I' _ 0
Inpul 1,5K -- [ OUtpUt
Figure20. Model RA*IOOMV SchematicDiztgranl
26
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