Specification; Measured Values; Technical Data - Wohler SP 22 Bedienungsanleitung

1. Specification

1. Specification
The digital sound level meter SP 22 provides automatic or manual ranging in six
measurement ranges from 30 to 130 dB. The unit meets ANSI S 1.4 and IEC 651 Type 2
standards, and features 0.1 dB resolution.
A background noise absorber permits you to measure sound levels accurately even in
the presence of high background noise.
The meter allows you to select between fast and slow response times and A and C
weighting. A maximum hold function is provided.
Jacks on the meter provide both AC and DC analog output, while an RS-232 interface
allows you to use an optional cable to capture sound level data on a PC.

1.1 Measured Values

Applicable Standards
Measurement Frequency Range
Accuracy
Measurement Level A Weighting
Measurement Level C Weighting
Measurement Level Range
Automatic Range
Digital Display
Quasi-Analog Bar Indicator
Range
Time Weighting

1.2 Technical Data

Microphone
Analog Output
Manual instruction
IEC 651 Type 2, ANSI S 1.4 Type 2
31.5 Hz ... 8 KHZ
± 1,5 dB (under reference conditions)
30 dB ... 130 dB
35 dB ... 130 dB
6 ranges i n 10 dB steps:
30 ... 80 dB, 40 ... 90 dB
50 ... 100 dB, 60 ... 110 dB
70 ... 120 dB, 80 ... 130 dB
30 ... 130 dB
3 1/2 digit LCD,
resolution: 0.1 dB
update: every 0.5 seconds
1 dB display steps, 50 dB display range,
updated every 50ms
50 dB
FAST (F): 125 ms
SLOW (S): 1 s
6 mm diameter Electret condenser
microphone
AC: 0.707 Vrms (at full scale)
DC: 10 mvDC/dB
10