B&K 2250 Light Manual do Utilizador descarregar pdf (Página 154)

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Hand-held Analyzer Types 2250 and 2270 – User Manual

If you set Recording Control to Automatic, the recording will start when the measurement is

started and last for Maximum Duration or Elapsed Time, whichever is smallest. If you continue

a paused measurement, then a new recording is started.

If you set Recording Control to Manual Event, the recording will start the first time you press

the Manual Event pushbutton during the measurement (this starts a Manual Event marker and

a Sound marker), and stop the second time you press it; if you press it a second time before

Minimum Duration has elapsed, then the recording will continue until Minimum Duration has

elapsed; if you press it a second time after

Maximum Duration has elapsed, then the recording

has already stopped when Maximum Duration elapsed, and the pressing the button will have no

effect on the signal recording (the Manual Event marker, however, is stopped).

If you set Recording Control to Exclude Event, the recording will start the first time you press

the Back-Erase pushbutton during the measurement (this starts an Exclude Event marker and a

Sound marker), and stop the second time you press it – the behaviour will be similar to control

by the Manual Event pushbutton.

When Recording Control is set to External Event, and Trigger Input is set to Voltage Level,

then recording is started when the voltage level is ‘high’ and stopped when voltage level is

‘low’ (details in Appendix A). Duration Limit has no effect on this setting.

If you set Recording Control to Level Event, the recording will start, controlled by the level

trigger – see Chapter 11 for details.

When Recording Control is set to Image Event (Type 2270 only), then you will record 1s plus

the Pre- and Post-recording Time

If you set Recording Control to All Events, the recording will start when any of the events

above become active, and stop when all events are inactive again.

If Pre-recording Time has been set, then the recording will start this time before the Event

appears. This is possible because the recording is done continuously in an internal buffer, ready

to be saved as a wave file. The Pre-recording Time is limited by this buffer size and the

Recording Quality – details in Appendix A.

Note: Very long signal recordings will be split into wave files containing maximum 10

minutes, that is, a 35-minute signal recording will consist of 4 wave files, three with 10 minutes

of sound and one with 5 minutes of sound.

13.2.3 Control Recording using the Stylus

If Recording Control is set to any of the events, or to All Events, the recording can also be

controlled using the stylus directly on the profile, in the same way as you mark sound categories –

details in Chapter 11.

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B&K 2250 Light Manual do Utilizador Página 154