Instruction manual
Casella CEL-35X dBadge Users Handbook – Page 18 
Figure 17 
Casella CEL recommends the dBadge is locked to prevent the wearer 
from tampering with the unit.  To do this, press and hold  the  „R‟ key 
whilst pressing the „L‟ key 3 times, as shown in Figure 18. 
Figure 18 
This  will  lock  the  keypad  so  any  random  presses  of  keys  will  not 
accidentally effect the measurement.  The display of the CEL-35X will 
also  change  so  as  not  to  show  any  SPL  values.    This  removes  the 
temptation to shout into the microphone, as it has no visual effect.  A 
padlock  symbol    will  be  shown  in  the  bottom  left  of  the  screen  to 
indicate the keypad is locked, as shown in Figure 19. 
Figure 19 
To unlock repeat the process shown in Figure 18. 
Note:  If  „Autolock‟ is  enabled  from  configuration  menu,  (section  5.6) 
the dBadge will automatically lock. 
LAF 112.3
dB
DUR 07:45:12
DURATION
07:55:12
15Hrs
145Hrs
2. Press 3 times 
1. Press and 
hold  










