
12
LED STATUS GUIDE
LEDs
Meaning
Action
REC
ALM
No LEDs flash
-No logging started
Or
-No battery fitted
Or
-Battery completely discharged
Fit battery
Data won’t lose. Replace
battery and download
data
REC
ALM
Green single flash every 10 sec. *
-Logging, no alarm**
Green double flash every 10 sec. *
-Delayed start
Press the yellow button
in housing of datalogger
until Green and Yellow
LED
flash
synchronously, and then
logging will start
REC
ALM
Red single flash every 10 sec. *
-Logging, low alarm for RH***
Red double flash every 10 sec. *
-Logging, high alarm for RH***
Red single flash every 60 sec.
- Low Battery****
If logging, it will stop
automatically. Data won’t
lose. Replace battery
and download data
REC
ALM
Yellow single flash every 10 sec. *
-Logging, low alarm for TEMP***
Yellow double flash every 10 sec. *
-Logging, high alarm for TEMP***
Yellow single flash every 60 sec.
- Logger memory full
Download data
* To save power, the logger’s LED flashing-cycle can be changed to 20s or 30s via the
supplied software.
Green LED
Red / yellow LED