MSA Senscient ELDS 1000 series, Operating Manual

Page: 130 / 184

Problem Solving
130
Senscient ELDS™
Rev 15
GB
Event Title Event Description, Properties and Parameters
No SimuGas Fault No SimuGas Auto test was observed during the seven (7) preceding
days, leading to the diagnosis and declaration of a No SimuGas Fault
at this time. (Check Transmitter for SimuGas Auto enabled and +24V
power.)
SimuGas Auto User Req. The Transmitter was user commanded to perform a SimuGas Auto
test at this time.
SimuGas Auto Pass A SimuGas Auto test was successfully performed at this time. The
average, stable gas reading for this channel during the SimuGas Auto
test was as follows:-
SimuGas Auto Fail A SimuGas Auto test was performed and the result obtained fell
outside the pass criteria for this test. (Check optics, alignment and
general operating conditions.)
Lock Hunt Succeeded The laser diode(s) in the ELDS Transmitter were successfully locked
onto their target gas(es) at this time.
Lock Hunt Failed A cycle of the process performed to lock the laser diode(s) of the
Transmitter onto their target gas(es) has been completed, but has
failed. (Further locking cycles will be initiated automatically.)
Lost Laser Lock (F0/F1)
Lost Laser Lock (F2/F3)
One or more of the laser diodes in the ELDS Transmitter lost lock onto
their target gas(es) at this time.
(Re-locking will be initiated
automatically.)
Beam Block The ELDS signal reaching this Receiver has been zero for longer than
the configured Time-to-Beam-Block. Consequently a Beam-Block
condition has been diagnosed and declared at this time. (Check for
obstruction of beam-path, dirty optics, mis-alignment and +24V power
at Transmitter.)
Low Light The ELDS signal reaching this Receiver has been below the Low Light
threshold for long enough to require the recording of a Low Light event
log entry at this time. (Check for obstruction of beam-path, dirty optics
and mis-alignment.)
Gas Above DB Starts Target gas has been detected in the ELDS beam-path and started to
be signalled on the 4-20mA output at this time. The first gas reading
signalled was as follows:-
Gas Above DB Ends The detection and signalling of target gas ceased at this time. The
highest gas reading detected and signalled during this gas event was
as follows:-
Recovered from BB The system recovered from a previous Beam-Block condition at this
time.
Into BB The system entered and declared Beam-Block at this time. (Check for
obstruction of beam-path, dirty optics, mis-alignment and +24V power
at Transmitter.)
Recovered from BB Fault The system recovered from a previous Beam-Block Fault condition at
this time.
Into BB Fault The system diagnosed and declared a Beam-Block Fault at this time.
(Check for obstruction of beam-path, dirty optics, mis-alignment and
+24V power at Transmitter.)
Enter Ultra Low Signal The ELDS signal reaching the Receiver fell to an ultra-low level at this
time. (No further loss of signal can be tolerated. If a further loss of
signal occurs, this will result in the diagnosis and signalling of a Beam-
Block.) (Check for obstruction of beam-path, dirty optics and mis-
alignment.)