Xylem WQL-pH pH DATALOGGERS - Manual (Page 47)

WQL-pH Logging
121 ba75821e01 10/2009
7.4 Signal LED to indicate the operating conditions of the
logger
Next to the key button on the control panel of the logger there is a signal LED.
When the logger is not connected to the WQL-Log PC program, this red LED
indicates the different operating conditions of the logger as follows:
Mode of flashing Operating condition
One short flashing per second z The logging job is completed.
z The power supply of the logger
was interrupted. The logger has to
be connected to the PC program in
order to set the date and time.
Two short flashings, then a pause
of 3 seconds The logger is ready to log and can be
started with the logger key button.
A short flashing every 15 seconds The logging job is running (the logger
is logging).
Notes
z The flashing stops after 2 minutes to save energy. Pressing the logger
key button starts the flashing for 2 minutes again.
z Important: The logger can be started with the logger key button only while
the signal LED is flashing (if starting the logger with the key button was
set during the setting up of the logging job).