Casella CEL CEL-35X dBadge - Manual (Page 27)

Casella CEL-35X dBadge Users Handbook – Page 27
Display
Setup Blue LED
Off Blue LED Flashing
Slow Blue LED
Flashing Fast
ISO Leq <=79.9dB(A)
AND
Lpk <=134.9dB(C) Leq >=80 & <=84.9
dB(A)
OR
Lpk >=135 &
<=136.9 dB(C ) Leq >=85dB(A)
OR
Lpk >=137dB(C)
OSHA Lavg (T=80)
<=84.9dB(A)
AND
Lpk <=139.9dB(Z) Lavg (T=80) >=85
(A)
OR
Lpk >=140dB(Z) Lavg (T=80)
>=85dB(A)
AND
Lpk >=140dB(Z)
For the ISO mode, the alarm levels are based upon the EU directive
2003/10/EC. OSHA levels are based upon the American
Occupational Safety and Health Administration (OSHA) regulations.
As an example, if the CEL-35X is in ISO mode, and the Leq rises
above 80dB(A) then the LED will flash slowly (approx once per
second). If an impulsive noise occurs above 137dB(C) peak, the blue
LED will flash quickly (approximately twice per second). Note that for
peak levels the action level only needs to be exceeded once during
the day for the employee to be over the relevant action level.
However, for the time-averaged data (Leq and Lavg) the LED may
switch on and off depending on how the employees‟ exposure varies
throughout the day. It is important to realise alarm indications are
based on the average or peak levels since the start of the run, and not
averaged to 8 hours.