El-usb-2, Led flashing modes, Humidity, temperature and dewpoint usb data logger – Martel Electronics EL-USB-2 User Manual
Page 3: Leds meaning action

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