NL-28聲級(jí)計(jì)是日本理音推出的聲級(jí)計(jì)，NL-28是替代原來(lái)NA-27的新產(chǎn)品!

上海熙浩代理銷售日本理音噪音計(jì)， ：（銷售部）

Sound Level Meter and 1/3 octave band real-time analyzer NA-28

1. Real Time Octaves （16 Hz to 16 kHz） or 1/3 octaves （12.5 Hz to 20 kHz）
2. Real Time Simultaneous Octaves （16Hz to 8kHz） and 1/3 Octaves （12.5Hz to 12.5kHz）
3. Data stored as text files direct to CF card
4. Measures and logs eq, max, min and 5 percentile values （LN） in octaves and/or 1/3 octaves
5. Auto Stores 300 000 data sets or 1 000 hours of 1 second 1/3 octaves onto 1 GB CF card
6. Auto Stores 1000 data sets or 10 000 of 1 second 1/3 octaves to internal memory
7. Manual Storage for 1 000 data sets internally or 100 000 data sets to 1 GB CF card
8. Linearity 110 dB in Sound Level Meter Mode and 95 dB in Analyzer Mode
9. 16 hours battery life with 4 Alkaline"C" Cells
10. Main and Sub-Channel for simultaneous selection of 2 time or frequency weightings F（Fast）, S（Slow）, 10 ms Time Weightings plus Peak & Impulse on Sub-Channel
11. Data transfer using CF card or USB （meter/CF card appearing as virtual disk）
12. Measurement can be started by internal or external trigger
13. Comparator output to trigger external devices
14. AC and DC outputs of main and/or sub-channel
15. Expandable functionality using programme cards
16. IEC 61672-1:2002 Class 1，IEC 61260:1995 Class1，ANSI S1.4-1983 Type 1，ANSI S1.11-2004 Class 1

Specification ：