2. SPECIFICATIONS
Circuit
Custom one-chip of microprocessor LSI
circuit.
Display
LCD size : 50 mm x 30 mm
LCD with backlight ( ON/OFF ).
Measurement
SPL
: Sound pressure level
Type
Measurement
SPL
：
30-80,50-100,80-130 , Auto ( 30 - 130 dB ).
Range
Resolution
0.1 dB.
Function
dB ( A & C frequency weighting ),
Time weighting ( Fast, Slow ),
Data hold , Peak Hold .
Record ( Max., Min. ).
4-20 mA output
Please refer chapter 4-9 ( page 9 )
Accuracy :
±
(0.5 % + 0.05 mA) ( 23 ± 5
℃
)
loop impedance : max. 200 ohm.
Accuracy
(23 ±5
℃
)
Characteristics of " A " frequency weighting
network meet IEC 61672
-1-2013,
class 2.
Under 94 dB input signal, the accuracy
are :
31.5
Hz
reading
±3.0 dB
63
Hz
reading
±2.0 dB
125
Hz
reading
±1.5 dB
250
Hz
reading
±1.5 dB
500
Hz
reading
±1.5 dB
1 K
Hz
reading
±1.0 dB
2 K
Hz
reading
±2.0 dB
4 K
Hz
reading
±3.0 dB
8 K
Hz
reading
±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.
2
