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

5.1 Sound level screen (main channel display)

Note

  • While the actual display may not look exactly like those in the figures below, the explanation is based on the assumption that the same text will be displayed.

Manual

Manual

NX-43EX

Auto or Timer Auto

Auto or Timer Auto
No. Name Description
1 Measurement mode Displays the measurement mode.
2 Windscreen correction Displays the windscreen model set with the windscreen correction function.
3 Diffuse sound field correction Appears when diffuse sound field correction is set to [On].
4 Back erase function
(Manual)		 Appears when the back erase function is set to 1s, 3s, or 5s.
5 Delay measurement function Displays the time (seconds) set with the delay measurement.
6 Trigger mode
NX-43EX		 Appears when the measurement start trigger is set.
7 SD card Appears when an SD card is installed.
8 SD card remaining capacity Displays the remaining capacity of the installed SD card.
9 Store mode Displays the store mode when saving to memory.
There are three store modes: Manual, Auto, and Timer Auto.
10 Store name Displays the store name.
11-a Address
(Manual)		 Displays the memory address. If there is already data at that address, this will be
displayed in red.
11-b Total measurement time
(Auto)
NX-43EX		 In the Auto store mode, displays the total measurement time.
Not displayed in Timer Auto mode.
12-a Calculation / measurement
elapsed time
(Manual)		 Displays the elapsed time since starting measurement in hours, minutes, and seconds.
12-b Measurement elapsed time
(Auto, Timer Auto)
NX-43EX		 Displays the elapsed time since starting measurement in days, hours, minutes, and
seconds.
13-a ---- Not displayed in Manual Store mode.
13-b Lp store interval
(Auto, Timer Auto)
NX-43EX
When the store mode is set to Auto or Timer Auto, the set Lp store interval is displayed.
14-a Calculation / measurement time
(Manual)		 Displays the total measurement time set in the store settings.
14-b Leq calculation interval
(Auto, Timer Auto)
NX-43EX		 When the store mode is set to Auto or Timer Auto, the set Leq calculation interval is
displayed.
15 Menu / Pause / Measurement
status

Touch to display the [Menu] screen.

Flashes during measurement.
In addition, the indicator LED flashes red.
Flashes during measurement standby in Timer Auto mode.
In addition, the indicator LED flashes blue.
When set to Manual store mode, if the PAUSE/CONT key is pressed while measuring, measuring will pause and this will flash.
In addition, the indicator LED flashes blue
If the PAUSE/CONT key is pressed in the current state, measuring will pause and this will appear.
Flashes when the operation is locked.
Touching the key lock on the menu ring locks all setting values.
Operations other than turning off the screen and unlocking the key lock will not provoke a response. To turn the power off, disable the key lock and then press the POWER key.

* The [Menu] screen is also displayed when you touch [Man.] in the upper left of the screen.
16 Bar graph range Displays the values from the lower limit to the upper limit of the bar graph. The range can be changed via [Display] in the [Menu] screen.
17 Bar graph Displays the sound level as a bar graph (updated every 0.1 s).
18 Frequency weighting

Displays the frequency weighting set for each channel.

A A-weighting
C C-weighting
Z Z-weighting
19 Time weighting

Displays the time weighting set for each channel.

F Fast
S Slow
I
NX-43EX		 Impulse
20 Under-range indication
UN (White on black)
(White on black)		 When a sound level under-range condition is detected, the indication is shown for at least 1 second.
UN If the calculation contains signal under-range data, the indication is shown. This indication remains on the calculation result screen until the next calculation measurement is started.
21 Overload indication
OV (White on red)
(White on red)		 When a sound level overload condition is detected, the indication is shown for at least 1 second.
OV If the calculation contains signal overload data, the indication is shown. This indication remains on the calculation result screen until the next calculation measurement is started.
22 Comparator
コンパレータ Displayed when a comparator signal (open collector signal for controlling external devices) is set.
23 Reference signal output
基準信号出力 Displayed when [Ref. Signal Output] is turned on the [I/O] screen.
24 Lp value display Displays the sound level for each channel (updated every second).
25 Information display bar

Each time you touch the [info] on the menu ring, the displayed information will switch.
[info] is displayed by touching [>] on the far right of the menu ring. See the description of the menu ring.

Information display bar

AC AC
Displays the frequency weighting of the AC output set in [Signal Output] - [AC OUT] on the [I/O] screen.
[Main] will be displayed if linked with Main, and [A] if A-weighting is selected.
The character color changes depending on the setting of [Output Level Range].
・The output level range is linked to the graph upper limit or set to [Off]: Black text Main
・The output level range is set to 70 dB to 130 dB: Red text Main
If the sound level exceeds the value set in [Signal Output] - [Output Level Range] on the [I/O] screen, the background color of letters AC turns red AC and is shown for at least 1 second. In this case, set [Output Level Range] to a larger value.
DC DC
Displays the target channel of the DC output set in [Signal Output] - [DC OUT]on the [I/O] screen. If it is linked with Main, [Main] will be displayed.
The character color changes depending on the setting of [Output Level Range].
・The output level range is linked to the graph upper limit or set to [Off]: Black text Main
・The output level range is set to 70 dB to 130 dB: Red text Main
If the sound level exceeds the value set in [Signal Output] - [Output Level Range] screen, the background color
of letters DC turns red DC and is shown for at least 1 second.
In this case, set [Output Level Range] to a larger value.
DC Displays the recording mode of the waveform recording function and the number of files recorded in each recording mode (M: Manual, L: Level, I: Interval, T: Total).

* Even if the optional program NX-43WR is not installed, this information is displayed but waveform recording cannot be selected.
26 Menu ring

Each time you touch [>] on the far right of the menu ring, the displayed menu switches.
Each time you touch [＞] on the far right of the menu ring, the displayed menu switches.

Range Sets the upper and lower limits of the bar graph.
Freq. Weight Sets the frequency weighting for each channel.
Time Weight Sets the time weighting for each channel.
Cal. Displays the calibration screen.
Disp Switches the screen display.
Leq Store
Lp Store
(Manual)		 Displayed when in Manual mode.
Even if you select [Cancel] to save data after measurement, you can save the data again. “Leq Store” appears in the menu ring. Touch it to save the Leq store data (Leq, LE, Lmax, etc.).
When paused, [Lq Store] appears. Touch it to save the Lp store data.
Screen Shot Saves a screenshot of the displayed screen.
Print Prints a screenshot of the displayed screen.
Lock Turns on/off the key lock function.
Operations other than turning off the screen and unlocking the key lock will not provoke a response.
To turn the power off, disable the key lock and then press the POWER key.
Light Off Turns off the backlight.
info Switches the display of the information display bar.
27 Battery level / Power status

Displays the power status.
Check this indicator when using the device on batteries. As the batteries are used, the remaining level decreases.

Full Full
Low Low
In this state, the backlight dims regardless of the brightness setting. Replace the batteries. In this state, the backlight dims regardless of the brightness setting.
Replace the batteries.
Measurements cannot be taken when the display starts flashing (the battery will run out soon, so do not perform measurement operations).
Replace the batteries immediately.
Appears when using the AC adapter or battery pack. Appears when using the AC adapter or battery pack.
Appears when USB power is being supplied from a USB charger. Appears when USB power is being supplied from a USB charger.
28 I/O communication Appears when [I/O Port] is set on the [I/O] screen.
29 USB communication Appears when USB is set on the [I/O] screen.
30 LAN communication
NX-43EX		 Appears when LAN is set on the [I/O] screen.
31 Date / Current time Displays the current date and time.

Please scroll left and right to see the table.

Note

  • When operating the device with just an external power supply, if the device is turned off when the external power supply turns off, the auto-, file-closing and auto-shutdown operations will not be performed, and so we recommend installing new batteries in the main unit. However, make sure to set the power-on mode switch to the A side (“Turning on/off the power”).