Casella CEL CEL-63X - Manual (Page 13)

CEL-63x Environmental & Occupational Noise Meter
13 Casella CEL
3.3 Set the time and date
Follow the steps below to set the clock.
1. Press and release the ON/OFF key to switch the instrument ON.
2. Wait approximately 10 seconds until the instrument‟s initialization
screen changes to the Status screen.
3. Press the Menu Soft key to see the instrument‟s Settings menu.
4. Follow the instruction steps shown in Figure 2 to set the time and the
date.
NOTE
You can set the instrument‟s clock to the exact time by setting the hour and the minute,
and then pressing the Save Soft key when the second hand of a reference clock
reaches the start of the minute.
Figure 2. Setting the time and date
3.4 Calibrating the instrument
The CEL-63x is a precision measuring instrument. You should calibrate it
before each measurement run and again after each measurement run so that
you can be certain its measurements are accurate.
To calibrate the instrument you will need a suitable calibrator that generates a
1 kHz reference tone. Depending on the type of calibrator, the reference tone
can have a nominal sound pressure level of either 94 dB or 114 dB. Check the
information supplied by the calibrator manufacturer to find the exact sound
pressure level that the calibrator generates.