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Range selector
Time weighting
( Fast & Slow )
Calibrator
Output Signal
Output terminal
Calibration VR
Manual range: 3 ranges ( 30 to 80 dB,
50 to 100 dB, 80 to 130 dB ).
Auto range: 30 - 130 dB.
Fast - t= 200 ms, Slow - t = 500 ms,
* "Fast" range is simulated the
human ear response time.
* "Slow" range is easy to get the avg.
values of vibration sound level.
* The "Fast" & "Slow" response
range are designed to meet IEC 61672
class 2 requirement.
B & K (Bruel & kjaer), MULTIFUCTION
ACOUSTIC CALIBRATOR 4226.
* AC output :
AC 0.5 Vrms corresponding to each
range step.
Out put impedance - 600 ohm.
* RS232 output.
Terminal 1 :
RS232 computer interface terminal,
photo couple isolated.
Terminal 2 :
AC output terminal.
Terminal socket size :
3.5 mm dia. phone socket.
Build in external calibration VR, easy to
calibrate on 94 dB level by screw driver.
3
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