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EL-USB-2
LED FLASHING MODES
Humidity, Temperature and Dewpoint USB Data Logger
LEDs
Repeating
sequentially
RH T
RH T
after 10s
Meaning
No LEDs flash
- No logging started.
or
- Battery fitted but completely discharged.
or
- No battery fitted.
Plug the data logger into the PC and run the control software
to find out which condition applies.
Alternating green double flash every 10 seconds
- Logger configured for delayed start.
Action
Start logging.
Replace battery.
Fit battery, start logging.
No action needed,
logger will start at a
later date and time.
Alternating green single flash every 10 seconds
RH T
10s
- Logger operating.
- Last stored Humidity and Temperature readings within set
alarm levels.
(if latching is enabled, then a flashing Green LED indicates that no
alarm condition has ever been logged)
Alternating between green and red single flash every 10 seconds
- The green LED indicates the parameter that is within set
None
RH T
RH T
10s
or
10s
or
RH T
RH T
10s
10s
alarm levels.
- The red LED indicates the parameter for which the Low
Alarm level has been exceeded.
(if latching is enabled, then the alarm condition may have
been triggered a while ago)
Alternating between green single and red double flash every 10 seconds
- The green LED indicates the parameter that is within set
alarm levels.
- The red LED indicates the parameter for which the High
Alarm level has been exceeded.
(if latching is enabled, then the alarm condition may have
been triggered a while ago)
RH T
RH T
RH T
RH T
Alternating between green or red triple flash every 10 seconds
Warning : Logger memory is full.
Download data.
In this condition, latching is automatically enabled, and a flashing Green
10s
or
10s
or
10s
or
10s
LED indicates that no alarm condition has ever been logged.
Simultaneous red single flash every 60 seconds
RH T
Warning : Battery is nearly discharged.
No alarm conditions are indicated.
Fit new battery and
download data.
60s
Once the battery is exhausted, no LEDs will flash.
DT-EL-USB2
Martel Electronics Corporation
3
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