2. SPECIFICATIONS
Circuit
&XVWRPVLQJOHFKLSPLFURSURFHVVRU
LSI
circuit.
Display
LCD size : 35 x 30 mm.
LCD with green backlight ( ON/OFF ).
Measurement
SPL
: Sound pressure level
Type
Dose
：
test noise exposure
Measurement
SPL
：
Auto 35 - 130 dB.
Range
Dose
：
70
～
130dB
Resolution
0.1 dB.
Function
dB ( A & C frequency weighting ),
Time weighting ( Fast, Slow ),
Data hold
Record ( Max., Min. ).
Accuracy
Characteristics of " A " frequency weighting
(23 ±5
℃
)
network meet IEC 61672 class 2.
Under 94 dB input signal, the accuracy
are :
31.5
Hz
±3.0 dB
63
Hz
±2.0 dB
125
Hz
±1.5 dB
250
Hz
±1.5 dB
500
Hz
±1.5 dB
1 K
Hz
±1.0 dB
2 K
Hz
±2.0 dB
4 K
Hz
±3.0 dB
8 K
Hz
±5.0 dB
Remark :
The above spec. are tested under the
environment RF Field Strength less
than 3 V/M & frequency less than 30
MHz only.
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