User's Manual

Additional measuring functions

7.2 Audio recordings

Loggers in the Sebalog N-3 series are able to save recorded noises as audio files and to

send them to the reading device. This means the user is no longer reliant on the

measurement values alone (level/frequency/ESA value) when evaluating a noise. You

can actually listen to the suspected leak.

Firstly, the loggers automatically save the quietest noise in the measuring period as an

audio file. This file can, for example, be called up later with the Commander and

replayed.

Secondly, you can get a recording of the current noise in the pipe from each installed

logger. This allows you to listen on a pipe, almost in real time, without any additional

equipment (sensor rod microphone or similar).

7.2.1 Reading out the audio data

Each logger automatically records the quietest noise (leak noise) in a measuring period

and saves it as an audio file. To spare the logger’s battery, this file is not automatically

sent to the reading device when the logger is read. It must be queried separately.

To query audio data in a logger, proceed as follows:

Step Description

In Easy mode … In Professional mode …

… select the button in the

main menu.

… select the symbol in the main

menu bar.

2 Select the Read / Play audio data

button.

Select the Read audio data button.

Result: The loggers in the workgroup are listed in the next view.

If necessary, you can call up another

group using the drop-down list at the

very top of the screen.

Select the logger list and then the logger from which you wish to call up the leak

noise.

5 Apply the Read audio data button to continue.

Result: The ID and comment of the logger, from which the audio data is called

up, are shown once again in the next view. Data transfer starts automatically. A

blue bar shows the progress of the transfer. After the transfer has been

successfully completed, the display automatically switches to the menu for

playing back audio data (see page 61). You can then listen to the leak noise

that has just been read.

An error message appears on the screen if the data transfer fails. Ensure the

Commander is in the wireless range of the logger concerned. Press Start to

repeat the procedure.

Introduction

Procedure