RHT10-EN v4.0 4/14
10
RHT10 LED STATUS GUIDE
LEDs Meaning Action
Record Alarm
No LEDs flashing
-No logging in process
Or
-No battery found
Or
-Battery completely discharged
Fit battery in place
Replace the battery and
download the data
Record Alarm
Green single flash every 10 sec. *
-Logging, no alarm**
Green double flash every 10 sec. *
-Delayed start
To start, Hold the start button
until Green and Yellow LED
flash
Record Alarm
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
†
Logging, if enabled, will stop
automatically. No data will be
lost. Replace battery
Record Alarm
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.
- RHT10 memory full
Download data
* To save power, the RHT10’s LED flashing cycle can be changed to 20s or 30s via the supplied software.
** To save power, alarm LEDs for temperature can be disabled via the supplied software.
†
When the battery is low, all operations will be disabled automatically. NOTE: Logging automatically stops when
the battery weakens (logged data will be retained). The supplied software is required to restart logging and to
download logged data.
‡ When both temperature and relative humidity readings exceed alarm level simultaneously, LED status indication
alternates every other cycle.
