Casella CEL CEL24X - Manual (Page 7)

4. GENERAL OPERATION
1. Press and release the Power ON/OFF key to switch ON. During the software
initiation the screen will display the firmware version (e.g. V035-05 indicates issue
5 of the firmware) and the serial number (such as 0108121) followed by the Main
Measurement screen. (Refer to Figure 3).
Note: During power-up, CEL-242 and CEL-246 models will display time/date and
memory settings as described in Section 8 . If you do not wish to alter these settings
on CEL-242/246 models do not press any keys and the instrument will proceed to the
main measurement shown below.
2. If the instrument requires calibration, refer to CALIBRATION for details.
3. Fit the windshield over the microphone before attempting any measurement.
CEL-240/242 CEL-244/246
A. – Battery Indicator. B. – Over Range Indicator. C. – Sound Pressure Level.
D. Analogue Display Bar. E. Measurement Scale. F. Maximum Sound Pressure Level.
G. Instrument Settings. H. Reset. I. Average Sound Pressure Level.
Figure 3 Main Measurement Screen
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