89
MAN0530 Issue 10 - 11/09
Searchline Excel
2104M0506
self test
This starts the system self test process.
The following message is displayed:
Press Enter to
Perform checks
This message is displayed during the self test process after pressing
Enter
.
Processing Data
Please Wait
This message is displayed for three seconds at the end of a successful self test process.
Checks Passed
alignment
This starts the alignment process.
The following message is displayed:
Press Enter to
Align Unit
This message displays the system output and reference signal values.
SIG:
MAX:
where:
A bar graph representing the current signal magnitude -
siG:
A bar graph representing the target signal -
tGt:
Important Notes:
1)
The overall objective of alignment is to maximise the
siG level. Maximised siG
corresponds
to optimal alignment.
2)
The Instrument Assisted Alignment (IAA) system only allows Excel to be initialised if the
siG
level is greater than or equal to the
tGt
level when
enter is pressed.
3)
The smallest
tGt
signal level that is initially set will be equivalent to 70% (0.700) of the
signal expected for the installation’s path length.
4)
The
tGt
level will increase gradually if the current
siG
level is larger than the
tGt level.
The tGt
signal level only ever increases. If the current
siG
level falls below the
tGt
level,
tGt
will remain at its previous highest value. In order to initialise the gas detector
the siG
level must be brought back above the
tGt level.
5)
If the
siG leve
l is less than 50% of the expected level, the bar graphs are
not
displayed.
Instead both
siG and tGt
levels are displayed as
numbers.
APPENDIX A - HANDHELD INTERROGATOR
