The possible status messages and indicators are summarized in Table 6 below.
Table 6: Status messages and indicators
Message
Condition
Description
Status OK
Info
Aurora H2O
is operating normally, no faults or other indications.
No CH4 detected
Info
Aurora H2O
is reading moisture, but cannot detect the presence
of methane.
H2O under range
Info
The moisture level is below the system detection limits.
Warning - system overheating
Fault
The temperature inside the electronics module exceeds 85°C or the
air temperature inside the sample system enclosure exceeds 68°C.
The laser is powered off until the electronics module temperature
is below 80°C, and the sample system enclosure temperature is
below 65°C.
FAULT: Temperature
Fault
The temperature transducer is operating out of limits, is disconnected,
or has failed.
FAULT: Sample pressure
Fault
The internal (sample) pressure transducer is operating out of limits,
is disconnected, or has failed.
FAULT: Line pressure
Fault
The external (line) pressure transmitter is operating out of limits,
is disconnected, or has failed. Occurs if source of the line pressure
measurement is set to “live”, and no pressure transmitter is attached.
Laser temp unstable...
Warning
The temperature of the laser is not stable. This warning occurs briefly at
power on, as the
Aurora H2O
sets the correct operating temperature.
The laser is powered off until the temperature has stabilized.
Laser Adjust at limits
Info
Aurora H2O
has reached the limit for adjusting the laser power.
Contact the factory for assistance.
Laser reference fail
Fault
Aurora H2O
could not detect any signal from the laser.
Contact the factory for assistance.
Weak signal return - check mirror
Info
Aurora H2O
could not detect a signal returned from the sample cell,
or the signal is below allowed limits. Check mirror for contamination.
FAULT: TEC FAIL
Fault
Aurora H2O
has detected a failure in the laser temperature control.
Contact the factory for assistance.
WARNING -
Sample pressure TOO HIGH
Warning
The pressure in the
Aurora H2O
sample cell is greater than
212 kPa (30.75 psia). Verify regulator and flow settings;
check for blocked vent line or excessive back pressure.
ERROR: TEC setpoint out of range
Fault
The
Aurora H2O
temperature controller is/was set beyond its
operating limits. Contact the factory for assistance.
Service req: ###
Fault
Aurora H2O
has detected a fault condition that has no associated
status message. Contact the factory for assistance.
72
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