Elma DT171
side 12
LED Status Guide
LED Status Guide
LEDs
Indication
Action
REC ALM
Both LED lights OFF
Logging not active
Or
Low Battery
Start logging
Replace
battery
and
download the data
REC ALM
One green flash every 10 sec. *
Logging, no alarm condition**
Green double flash every 10 sec. *
Delayed start
To start, hold the start
button until Green and
Yellow LED flash
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 low battery: If logging,
it will stop automatically.
No data will be lost.
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, th
e logger’s LED flashing-cycle can be changed to 20s or 30s via the
supplied software.
** To save power, alarm LEDs for temperature and humidity can be disabled via the
supplied software.
***When both temperature and relative humidity readings exceed alarm level
synchronously, LED status indication alternate every cycle. For example: If there is
only one alarm, the REC LED blinks for one cycle and alarm LED will blink for next
cycle. If there are two alarms, REC LED will not blink. First alarm will blink for first cycle
and the next alarm will blink for next cycle.
****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.
REC
ALM
Gr e e n LED
Re d /Ye l l o w LED
Summary of Contents for DT171
Page 15: ...Elma DT171 side 15 ...