146
Specifications
I/O connector
Sound level meter control from and data output to a computer
Data output to printer DPU-414/CP-11/CP-10
RS-232-C
Transfer principle: asynchronous
Data word length: 8 bit
Stop bits: 1 bit
Parity check: none
Baud rate: 4800, 9600 or 19200 bps
Flow control: yes
Select X parameter control or
RTS/CTS control
Comparator output
Open collector output; goes ON when set level is exceeded
Maximum voltage: DC 24 V
Maximum current: DC 60 mA
Level setting range: 30 to 130 dB, 1-dB steps
Power requirements
Four IEC R6P (size "AA") batteries
Battery life (23°C)
NL-21: Approx. 32 h (alkaline batteries),
12 h (manganese batteries)
NL-31: Approx. 27 h (alkaline batteries),
10 h (manganese batteries)
With backlighting, battery life is reduced to about half.
When auxiliary processing functions are enabled, bat-
tery life is reduced by about 20%.
When the optional filter is enabled, battery life is re-
duced by about 20%.
AC adapter (option)
NC-34: 100 V AC
NC-34A: 120 V AC
NC-34B: 220 V AC
NC-98A: 100 to 240 V AC (CE-marked)
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