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

7.2 Store operation in Auto mode NX-43EX

The device performs continuous recording of the time-weighted sound level (Lp) at the configured Lp store interval (Lp store) and continuous recording of the calculation results (Leq, LIeq, Leq,mov, LE, Lmax, Lmin, LN, Lpeak, Ltm5) at the configured Leq calculation interval (Leq store). In Lp store, the device simultaneously records Leq, LIeq, Lmax, Lmin, and Lpeak, along with Lp. 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 time reaches the set total measurement time.
  • When the number of file splits per hour in Lp store reaches 9,999.
  • When the Leq store reaches 60,000,000 entries (with files split every 60,000 entries reaching 1,000).
  • When the capacity of the SD card becomes insufficient.
Item Description
Lp store Continuously auto-saves the sound level Lp along with the calculated values Leq, LIeq, Lmax, Lmin, and Lpeak.
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.
Leq Store Continuously auto-saves all calculated values except the sound level Lp as a single data set, with up to 60 million data sets (60,000 data sets × 1,000 files).
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, Lp store and Leq store are performed simultaneously (they can also be performed separately).

1Touch [Menu] on the measurement screen.

Touch [Menu] on the measurement screen.

The [Menu] screen appears.

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

Touch [Store] on the [Menu] screen.

The [Store] screen appears.

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

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

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

Select [Auto], and touch [Apply].

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

Set 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.

Set 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.

Set 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], Lp store will not be performed.
  • In accordance with the selected Lp store interval, Leq, LIeq, Lmax, Lmin, and Lpeak are stored simultaneously along with Lp. However, except for Lp, the data cannot be displayed during recall on the device and is only viewable on a computer.

8Set the Leq Calc.Interval.

Set the Leq Calc.Interval.

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

2. Select a calculation interval.

  • If this setting is set to [Off], Leq 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.
  • The stored calculation data corresponding to the selected Leq calculation interval can be recalled on the device itself and viewed on a computer.

Note

  • You cannot set both the Lp store interval and Leq 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.

Press the START/STOP key on the measurement screen to start measurement.
  • Each time the set Lp store interval and Leq 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 Lp 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].

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

Note

  • The relationship between the elapsed measurement time and data quantity If the Lp store interval is set to 100 msec in Auto mode, 10 data items are saved per second, so if the elapsed measurement time is 10 seconds, the number of data items that will be saved is 100.
    If the Lp store interval is set to 1 sec, 10 data items will be saved.
  • The pause function cannot be used while in Auto mode.

7.2.2 Loading the saved data

For the operation method, refer to “Loading the saved data”.

7.2.3 Deleting the saved data

For the operation method, refer to “Deleting the saved data”.