Working in Easy mode 5.5 Evaluating the measured data You can use the Commander to view the measured data read out from a logger and to analyse it in greater detail. 5.5.1 Calling up the measured values To call up the measured data of a logger, proceed as follows: Step 1 Description In the main menu, select the Display logger data button. Result: The loggers in the workgroup are listed in the next view.
Working in Easy mode 5.5.2 Displaying the measured values View The measured data from the loggers are shown as a bar diagram on the screen. 1 4 2 3 4 Element Description 1 Identification number and comment of the displayed logger 2 Diagram Each bar represents a single noise recording. X-axis ... course of measurement over time Y-axis ... noise level in dB The colour of the bar shows the approximate frequency of the noise.
Working in Easy mode Functions There are the following functions for analyzing the displayed data: Button Description Scroll You can use this function to view in the diagram the measurement results of the other loggers in the group. To do so, apply the button and turn the selector knob to select a logger. Apply the button again to confirm your selection. Move Cursor You can use this function to move the vertical green line in the diagram from one bar to the next.
Working in Professional mode 6 Working in Professional mode 6.1 Starting up the Commander 6.1.1 Switching on the Commander Switching on Use the I/O button to switch on the Commander. The Professional mode start image appears on the screen: Workgroup Firmware version, System date, Identification number of the Commander Main menu bar Changing the If the symbol is shown at the bottom in the middle of the screen, the user mode Commander is not in Professional mode but Easy mode instead.
Working in Professional mode 6.2 Managing the loggers All loggers to be used for a measurement must be registered in the Commander beforehand. Only registered loggers can be programmed and read. Registration is performed either by manually inputting the logger ID or by automatic wireless detection. The registered loggers are combined in groups. 6.2.1 Managing logger groups in the Commander Introduction All loggers registered in the Commander must be assigned to a group.
Working in Professional mode Renaming a group You can rename an existing logger group. First select the particular group in the list and then select the Rename button. In the following screen views, enter a group mode (see page 13) and the new name of the group. The group then appears with the new name in the group list. Copying a group You can copy an existing logger group, with all its loggers, within the list and allocate a new name and new group mode to this copy.
Working in Professional mode 6.2.2 Managing the loggers in the Commander Select the symbol in the main menu, and the Logger Management button in the next view, to go to the menu for managing loggers. The loggers of the workgroup (see page 45) are listed. If the incorrect group is displayed, you can use the pull-down menu at the top edge of the screen to change the workgroup.
Working in Professional mode Registering loggers A logger can be registered manually by entering its ID. Proceed as follows: manually Step Description 1 Apply the Add logger button. 2 Type in the logger’s six-digit ID using the displayed keyboard (see page 14). Confirm the input with the ENTER button. Result: The registered logger is now shown in the list.
Working in Professional mode Deleting loggers You can delete a logger from the displayed group. Proceed as follows: Step Description 1 Select the logger in the list. 2 Apply the Delete button and answer the confirmation query with Yes. Result: The logger is no longer contained in the list. If the logger is not contained in any other existing group, it is simultaneously deregistered from the Commander. The measured data of the logger is deleted within the group.
Working in Professional mode 6.3 Programming the loggers Introduction Each logger must be configured before each measuring session. They are assigned with all the relevant parameters before the impending measurement. Even loggers that have already been programmed and installed can usually be reprogrammed. However, to save power, all loggers in group mode “Patrol” can only receive the Commander’s signal every 10 seconds, even in the time when they are ready for wireless operation.
Working in Professional mode Measuring parameters The following parameters must be stated in order to define the measuring window: Parameter Description Measurement Beginning and end of the daily measuring window. (from … to) Select from: 0:00 to 24:00 hours Default: 2 a.m. to 4 a.m. Explanation: The logger performs measurements and saves the measurement values within the stated window. Interference from background noise (traffic, water use, etc.) should be at a minimum at this time.
Working in Professional mode Radio parameters Continuous wireless availability and frequent wireless exchange of data have a detrimental effect on the lifetime of a logger’s battery. To spare the battery, the periods of wireless availability and activity can be restricted. To do this, the following parameters must be entered: Parameter Description Radio signal (from … to) Beginning and end of the daily transmission window.
Working in Professional mode Continuing Proceed as follows to continue the programming process: programming Step Description 1 Enter the data in turn for the group or the single logger. 2 Apply the Program button in order to finish the programming. Result: The configuration data is transferred from the Commander to the group. A new view opens on the screen with two windows: The left-hand window shows the loggers in the group that have been successfully programmed.
Working in Professional mode 6.5 Reading out the measured data After a group has been installed for at least one measuring day, the recorded data can be called up with the Commander. The same group mode for which the workgroup was configured is used (see page 13). Furthermore, you can always read just a single logger instead of a group. 6.5.1 Quick query of the workgroup The button on the very left of the main menu bar is always used as a quick-start button for reading the workgroup.
Working in Professional mode 6.5.2 Standard query of a single logger If you only wish to read a single logger with the commander, proceed as follows: Step 1 2 Description Select the symbol in the main menu bar. In the next menu, select the Read measurement data button. Result: The loggers in the workgroup are listed in the next view. 3 If necessary, call up another logger group using the drop-down list at the very top of the screen. 4 Select the concerning logger in the list.
Working in Professional mode 6.6 Evaluating the measured data 6.6.1 Calling up the measured values Calling up recent To view the measured values from a logger on the Commander’s screen, select the measured data symbol in the main menu and then the Display logger data button. The loggers in the workgroup are listed in the next view: If necessary, you can call up a different group using the drop-down list at the very top of the screen.
Working in Professional mode 6.6.2 Displaying the measured values Introduction In Professional mode the measured data from the loggers is shown as a bar diagram on the screen just as in Easy mode (see page 42). But, additionally the Professional mode provides the opportunity to compare the measured data of two loggers. Comparing After the measured data of a logger has been called up, this data can be compared to measured data the data of another logger in the group. To do so, select the Compare button.
Additional measuring functions 7 Additional measuring functions 7.1 Real time measurement Introduction The “Real time measurement” function allows you to follow, in real time, the current noise level and the frequency in a pipe directly on location and without additional measuring devices. A logger measures continuously and immediately transfers the data to the Commander. Purpose The real time measurement can be useful in many situations.
Additional measuring functions Display of The course of the real time measurement is shown on the Commander’s screen with a measured data running bar diagram: 1 2 4 5 3 6 Element Description 1 Identification number and comment of the observed logger 2 Diagram Each bar represents a single noise recording. X-axis ... course of measurement over time Y-axis ... noise level in dB The colour of the bar represents the frequency of the noise.
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.
Additional measuring functions 7.2.2 Playing back the audio data Introduction After an audio file is sent from a logger to the Commander, it can be played back with the Commander and listed to over headphones. First, connect the supplied headphones to the Commander via the 5-pin headphone socket . White markings on the plug and socket show the correct position of the plug. You must feel the plug engage.
Additional measuring functions 7.2.3 Displaying the frequency spectrum of the leak noise (in Professional mode only) Introduction In Professional mode, you can view the frequency spectrum of the saved leak noise for an even more in-depth analysis. Purpose Sometimes the assumed leak noise stems from a known source of interference (e.g. 50 Hz/100 Hz mains voltage or a pump in operation).
Additional measuring functions 7.2.4 Recording a noise directly (in Professional mode only) Introduction The “Direct recording” function of a Log N-3 logger enables you to listen in on the current noise in a pipe without using additional equipment (sensor rod microphone or similar). If “Direct recording” is performed with a logger already installed, you do not even have to open the shaft to listen to the pipe.
Professional 8 Increasing the wireless range of the loggers with repeaters when patrolling (in mode only) Increasing the wireless range of the loggers with repeaters when patrolling (in Professional mode only) Introduction The actual wireless range of a noise logger depends on the conditions at the place of use. If a logger is installed in a shaft, its radio signal sometimes does not reach far enough above the surface to be received properly during “patrolling”. In such cases a repeater can be used.
Increasing the wireless range of the loggers with repeaters when patrolling (in Professional mode only) 8.
Professional 8.2 Increasing the wireless range of the loggers with repeaters when patrolling (in mode only) Installing the wireless extension Before the wireless extension via repeaters can be set up, the logger concerned must already be programmed and installed at its place of use. Proceed on location as follows: Step 1 Description symbol in the main menu and the Select the Connect Repeater to Logger button in the next view.
Increasing the wireless range of the loggers with repeaters when patrolling (in Professional mode only) Step 5 Description Apply the Start button. The logger and repeater are connected. The vertical blue line in the bar indicator shows the strength currently of the wireless connection between the logger and repeater. 6 • Green area • Yellow area good connection poor connection Look for a suitable place around the installed logger for fitting the repeater.
