B&K 2250 Light Uživatelský manuál stáhnout pdf (Strana 52)

Hand-held Analyzer 2250 Light – User Manual

Type 4950 is the default entry. Change Microphone Type if you are using a different Type. For

known microphone types, a number of parameters are automatically set.

Note: For Type 4950 the parameters Nominal Sensitivity, Free-field and Capacitance are set

automatically. See details in Appendix C. The analyzer can then make sound field corrections

and windscreen corrections as specified in the setup. To confirm which type of correction is

being applied, an icon is displayed in the measurement Status field. If the microphone is

unknown to the analyzer, no corrections can be made and no icon appears in the Status field.

The parameters mentioned above have to be set manually (that is, typed in). We recommend

that you insert the value for Nominal Sensitivity directly from the calibration chart. Nominal

Sensitivity is used in the automatic level detection calculations, when calibrating using Sound

Calibrator Type 4231, to determine whether the level is 94 or 114 dB.

In the top line of the status field you can select which transducer is currently connected to the

analyzer. This can also be done via the Setup screen by selecting Input, then selecting the

transducer in the Transducer Used: field.

At the bottom of the parameter list you can select the calibration history for the currently

selected transducer by tapping on the Calibration History link. See section 5.4 and Fig.5.2.

When you have finished, tap to return to the measurement screen.

5.6 Calibration Reminder

The Calibration Reminder tab, see Fig.5.6, allows you to keep track of when you need to run

your next Accredited/Traceable calibration, and shows you the date of your last calibration.

Fig.5.6

Calibration reminder tab

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 211 212

Žádné komentáře

B&K 2250 Light Uživatelský manuál Strana 52