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2250 Light – User Manual
Note:
You are not required to set any measurement ranges on 2250 Light; the instrument has a
dynamic range of more than 120 dB, from 140 dB down to the noise floor of the instrument, (if
the microphone has nominal sensitivity).
3.1.1
Congratulations!
You should now be familiar with the basic principles of the 2250 Light. If you need more help,
the following section goes into the measurement process in more detail. If not, please refer to
Chapter 4.
3.2
Making a Measurement
3.2.1
What is a Project Template?
A Project Template contains all the common display settings and measurement setups required to
perform a noise measurement. The template does not contain any measurement data – this data
is saved as individual projects, stored in job folders, see section 6.1.1. The Project Templates
covered by this manual, are:
•
Sound Level Meter Project Template (included in BZ-7130 software)
•
1/1-octave Frequency Analysis Project Template (included in BZ-7131 software)
•
1/3-octave Frequency Analysis Project Template (included in BZ-7132 software)
•
Logging Project Template (included in BZ-7133 software)
Note 1:
Signal Recording Option BZ-7226 does not contain a specific template – signal
recording options are available in all templates.
Note 2:
Tone Assessment Option BZ-7231 does not contain a specific template – tone
assessment options are available in all templates included with BZ-7132/33.
If you make any changes to the settings in a Project Template, an ‘*’ will appear next to the
template name to indicate that the new settings have not been saved. Select
Save Template
from the Main Menu
to save the settings in the current template.
3.2.2
Switching On
Switch 2250 Light on by pressing
.
The start-up time depends on the state the instrument
was in when last switched off and it may take up to 2 minutes from a cold start, or up to 10
seconds if the instrument is already in Standby Mode (that is, from a warm start).
Note:
A cold start is described as a re-boot of the instrument from ROM. This normally occurs
after the instrument has been turned off for some time, either by the user or following an
automatic power-down. A warm start takes the instrument quickly from Standby Mode to
Operating Mode without having to re-boot. (The battery needs to be charged for this to happen,
see section 2.5.1.)
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