Casella CEL CEL-393 User Manual
Page 71
1.
Switch the instrument on, and check the battery level.
For correct operation with alkaline manganese batteries, the
voltage should be greater than 8V. Replace the batteries if the
indication is below this level.
2.
Calibrate the sound level meter with a CEL-284/2 Calibrator
Type 1 to obtain a reading of 114.0dB as described in Section
8.2.
3.
Mount the sound level meter on the CEL-4627 Tripod, and fit
the CEL-2962 Windshield.
4.
Position the instrument in the required location.
5.
Move the F-P-I-S switch to P for peak time weighting.
6.
Ensure that the Off-F1:1-F1:3 switch is off.
7.
Move the Lin-A-POWER OFF switch to Lin for linear frequency
response.
When the instrument is switched on, it defaults to measurement
in the 70-130dB range (Lin=SPL).
8.
Press 8R (8 immediately followed by R) to select the measure-
ment range between 80 and 140dB (SPL).
This will set the trigger level automatically for data collection at
80 + 20 = 100dB.
9
Press 1015C (if the actual time is 10.15 am for example) to set
the correct time into the instrument's real time clock.
10.
Press 0C to clear the memory of any calculated data from
previous measurements, and to set it for event mode storage.
393 Handbook
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