B&K 2250 Light Uživatelský manuál stáhnout pdf (Strana 145)

CHAPTER 12

Enhanced Logging (Optional Module)

133

Note: All other measured broadband and spectral parameters are logged automatically per

report period.

Then you can select:

• Number of CICs

• Desired time periods for calibration

6) Under the Logged Spectrum parameters, you can choose to log Full Spectral Statistics per

Logging Period or not.

Note: Logging the full spectral statistics at a short logging period (for example, every

second) takes up a lot of space on the memory card.

7) Under Triggers, you can specify a Signal Recording Timer for periodically starting a

signal recording (for example, five minutes per hour) and you can specify up to four

independent Level Triggers to be active at four different times during the day. Each level

trigger works as specified in section 11.1. In addition, you can specify a Hold Off period –

this means that during this period, new triggers are inhibited. You also have the ability to

trigger L

Xeq

(f1–f2).

Note: You can trigger on a specific frequency band by setting f1 = f2.

8) Under L

den

Periods parameters you can set up the day, evening and night periods and the

penalties in accordance with your local legislation.

To exit the screen, tap the icon.

12.2 Controlling the Measurement

The measurement is controlled in the same way you would control a normal Sound Level

Meter measurement, using Start/Pause , Continue , Back-erase and Reset

pushbuttons, see Chapter 3 for more details.

However, during the measurement, data are automatically saved in projects, one per day. The

projects are automatically saved at the time specified in the Save Project Data at parameter in

Setup > Measurement Control. The next project is (automatically) started immediately after the

first one, without any data loss.

Note: When Preset Logging Time has elapsed, or you pause the measurement, then the project

will not be saved automatically. This has to be done manually.

In the case of power failure, or other failures, the software is rebooted automatically. This

means that the measurement data collected up until the time of the reboot is saved in a project

and a new measurement is started. The new measurement is started in a new project.

The projects are named as specified in Preferences > Storage Settings.

Example: If you select Auto-naming of Projects, and start the measurement on the 13th of

November, then your projects for measuring 48 hours (assuming you have started in the middle

of the day, and have set Save Project Data at parameter to 00:00:00) will be:

051113 001 (containing data from the middle of the day November 13th until midnight)

1 2 ... 140 141 142 143 144 145 146 147 148 149 150 ... 331 332

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