Class 1 Sound Level Meter NL-53 / Class 2 Sound Level Meter NL-43
with Extended Function Program NX-43EX Instruction Manual Operation Guide

10.6 Card capacity and store time

L_p Store Interval setting only

In the case of 4 measurement channels.

Lp store time	SD card capacity
	512 MB	2 GB	32 GB
100 ms	56 hours	243 hours	3,540 hours
200 ms	116 hours	468 hours	7,040 hours
1 s	579 hours	2,260 hours	34,490 hours

L_eq Store Interval setting only

In the case of 4 measurement channels.

	SD card capacity
	512 MB	2 GB	32 GB
Data sets	1,260,000 sets	5,100,000 sets	77,880,000 sets

Number of bytes per header file

Approx. 1,555 Byte per file

The measurement time/number of data sets increases as the number of measurement channels decreases.

Number of channel(s)	Measurement time compared to measuring with 4 channels
1	Approx. 2.4 times as long
2	Approx. 1.6 times as long
3	Approx. 1.2 times as long