BRUEL & KJAER 2230 - Checking Procedure

BRUEL & KJ.LER
Nrerum-Denmark
Sensitivity
POWER: "On "
REF., TEST, OPERATE: "Operate"
FSD: "100"
FREQ. WEIGHTING: "Lin 1\ "
EXT. FIL TEA: "Out"
SOUND INCIDENCE: "Frontal "
DISPLAY:
"SPL"
TIME WEIGHTING: "Fast"
DETECTOR: "RMS"
ALL-MAX/MIN-PAUSE: "All"
Linearity
FSD to "120"
Frequency Response
FSD to "100"
Weighting Filters
FREQ. WEIGHTING to "A " or "C"
4.83
Checking Procedure
2230.1
Input
Voltage
DC Output
Voltage
Input signal through a 15 pF capacitor ' (Adaptor Type WA 0302) to Preamplifier
ZC 0020 input: 50 mV , 1kHz.
Check the Display reading: 94, 0.
If necessary adjust " Sens. Adj." on the right side of the instrument.
If not consult 2230.2 Analog Circuit.
L ....L..III:il..
l• ""'-....,
~ ~
OdB
-10dB -20dB -30dB
- 40dB -SO dB
3,000V
2,500V 2, 000V 1,500 v 1,000 v O,SOOV
Input signal 1 kHz corresponding to 3,000 V at "DC Output".
Decrease the Input voltage in 10 dB step and check that the DC Output de-
creases by 500 mV.
Tolerance:
± 30 mV.
Display reading
Freq.
Hz
unn
Lin
10
87,9 ± 2,0 93,4 ± 0,5
20
93,1 ± 0,5 93,7 ± 0,3
40
93,9 ± 0,3 93,9 ± 0,3
80
94,0
± 0,3
94,0
± 0,3
1,0
k 94,0 94,0
2,5 k 94,0 ± 0,3
94,0 ± 0,3
S,Ok 94,0
± 0,3
94,0
± 0,3
10
k
94,0 ± 0,3 94,0 ± 0,3
20k
93,9 ± 0,3 93,5 ± 0,5
Input signal 1 kHz corresponding to 94,0 on the Display.
Check the frequency response according to the table above.
Display reading
Freq.
Tolerance
Hz
A
c
+
dB -
10
79,7
1,5 2,0
20
435
87,8
1,0 1,0
40
59,4
92,0 0,5
0,5
80
71,5 93,5
0,5
0,5
160
80,6
93,9
0,3 0,3
315
87,4
94,0
0,3 0,3
1,0
k
94,0
94,0
0
0
2,5 k
95,3
93,7
0,3 0,3
S,Ok
94,5
92,7 0,5
0,7
10
k
91,5
89,6
1,0 1,5
20k
84,7
82,8
1,0 1,5
Input signal 1 kHz corresponding to 94,0 on the Display .
Check the frequency response according to the table above .
If not consult 2230.2 Analog Circuit.
Valid from serial no. 1 028 340
1-1