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

7.2 Store operation in Auto mode

The device continuously records the sound level (L_p) of the set L_p store interval and the result calculated during the L_eq calculation interval. This mode can be used by installing an SD card.
When one of the following conditions occurs, the store is stopped and data is saved.

When the total measurement time reaches the set value
When the L_eq store reaches 1,000 sets
When the capacity of the SD card becomes insufficient

Item	Description
L_p store	Continuously auto-saves the sound level L_p. This store function is useful when recording sound level fluctuations. For the store interval, you can select from Off, 10ms, 25ms, 100ms, 200ms, and 1s.
L_eq Store	All calculated values except sound level L_p are considered as a single data set, and up to 1,000 data sets can be stored continuously and automatically. This is optimal for measurements taken over a fixed long time duration. For the calculation interval, you can select from Off, 10s, 1m, 5m, 10m, 15m, 30m, 1h, 8h, 24h, and User Setting (up to 24 hours).

7.2.1 Saving to memory

An SD card must be inserted.
In Auto mode, L_p store and L_eq store are performed simultaneously (they can also be performed separately).

1Touch [Menu] on the measurement screen.

The [Menu] screen appears.

2Touch [Store] on the [Menu] screen.

The [Store] screen appears.

3On the [Store] screen, touch [Store Mode].

4Select [Auto], and touch [Apply].

5Set the store name (only when an SD card is inserted).

1. On the [Store] screen, touch [Store Name].
The input screen for the store name appears.

2. Enter the store name (4-digit number).
The setting range is from 0000 to 9999.
(BE: Deletes one character. AC: Deletes all entered characters.)

3. Touch [Apply].

6Set the total measurement time.

(s = seconds, m = minutes, h = hours)

1. On the [Store] screen, touch [Total Meas. Time].

2. Select a total measurement time, and touch [Apply].

If you select [User Setting], you can set the total measurement time to a time of your choice. The maximum time that can be set is 1000 hours.
When [Continue] is selected, the measurement will continue until the SD card runs out of space.

7Set the Lp store Interval.

(ms = milliseconds, s = seconds)

1. On the [Store] screen, touch [Lp Store Interval].

2. Select a store interval, and touch [Apply].

If this setting is set to [Off], L_p store will not be performed.
If this setting is set to [100ms], L_p, L_eq, L_max, and L_min will be stored at a 100 ms interval. L_eq, L_max, and L_min are not displayed when recalling on the main unit. They can only be viewed on a computer. Select anything other than [100ms], only L_p will be stored.

8Set the L_eq Calc.Interval.

1. Touch [L_eq Calc.Interval] on the [Store] screen.

2. Select a calculation interval.

If this setting is set to [Off], L_eq store will not be performed.
If you select [User Setting], you can set the calculation interval of your choice. The maximum time that can be set is 24 hours.

Note

You cannot set both the L_p store interval and L_eq calculation interval to [Off].

9Touch [Back] or press the START/STOP key to return to the measurement screen.

10Press the START/STOP key on the measurement screen to start measurement.

Each time the set L_p store interval and L_eq calculation interval elapse, the measurement amount is automatically saved.
After saving this data to the memory, the store name turns red.
The measurement stops when the specified total measurement time has elapsed. To finish in the middle of measuring, press the START/STOP key.
If the L_p store interval is set in Auto mode, you can mark the data if necessary (“Markers”).

11When measuring again, press the START/STOP key and select from [Increment the store name], [Overwrite], and [Cancel].