B&K 2250 Light Bedienungsanleitung PDF herunterladen (Seite 150)

138

Hand-held Analyzer Types 2250 and 2270 – User Manual

13.1.1 Setting up the Analyzer

1) Select a Sound Level Meter project template or a Frequency Analyzer project template.

(see section 3.3.1 for more details on templates.)

2) Depending on your memory device:

• Insert an SD memory card in a SD card slot at the bottom of the analyzer

• If you have hardware versions 1 – 3, you can insert a CF memory card in the CF card

slot at the bottom of the analyzer

• With hardware version 4, you can use a USB Type A stick at the bottom of the

analyzer

Note: You cannot record the signal on the internal disk.

3) Tap the Main Menu icon and select Explorer from the list of options. Navigate to

the memory card, create a job folder for the measurements and set the default

measurement job/path as described in Chapter 6.

4) Tap the Main Menu icon and select Setup from the list of options. Set all the

parameters as required for the Sound Level Meter or Frequency Analyzer measurement,

see Chapter 3 and Chapter 10, respectively.

5) Under Signal Recording you can specify the Recording Control parameters as follows:

• Automatic, if you want to start the recording when you start the measurement and stop

when you pause the measurement, and to limit the recording to Maximum Duration, if

Duration Limit is set to On

• Manual Event, if you want to start and stop the recording using the Manual Event

pushbutton during the measurement and to limit the duration of the recording, if

Duration Limit is set to On. In this case the recording will be at least Minimum Dura-

tion long, but no longer than the Maximum Duration. Use Pre-recording Time and

Post-recording Time to specify how much extra you want to be recorded before and

after the event

• External Event, if you want to start and stop the recording using an external trigger

signal, connected to the Trigger Input. See details in Appendix A

• Image Event (Type 2270 only), if you want to make a short recording together with

capturing an image. The recording will be "Pre-recording Time + Post-recording Time

+ 1" second long. See details in Appendix A

• Off, if you do not want to record the signal

6) Set Recording Quality to High, Medium, Fair or Low in accordance with your needs.

Note: High quality requires more disk space than low quality – details in Appendix A.

7) Set Recorded Signal to either Input A/B-weighted, Input C-weighted or

Input Z-weighted

(A/B-weighting is determined by setting the parameter in Setup > Frequency

Settings > Broadband (excl. Peak)). Input C-weighted is suitable for recordings used

afterwards to identify the sound source – it contains all the audible content of the signal,

but reduces the low-frequency noise from wind, etc.

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B&K 2250 Light Bedienungsanleitung Seite 150