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NGA-2000 System Calibration
90003482(2) [NGA-e (MLT-Software 3.2.X)] 07/98 NGA 2000 Supplement - 13
3.4 Controlling System Calibration
After setting-up there is the possibility to start 3 different modes:
system zero-calibration: In this mode a zero-cal of all modules, which are enabled
for SYSCAL, will be performed. The order of modules
depends on purge time for zero-valves because the whole
calibration is time optimized.
system zero/span-calibration: In this mode will be performed a zero-cal and a span-cal
for every enabled AM. The order of calibration is
optimized to have a minimum of calibration time. The only
condition is to have for each AM first the zero-cal and after
this the span-cal. With zero-cal an AM is zeroed with all
ranges together, the span-cal is done separately for all
available ranges. A range is available if its span-gas value
is > 0.0.
user defined sequence program: In this mode the user is responsible for the optimization.
See setup of this mode.
gas test: It is also possible to switch for test purposes onto a
special gas of a specific module. A calibration is not
done.
Any mode can be started by the following instances:
• Manually by operator interaction
• Triggered by programmable input (DIO)
• AK-protocol command
• Programmed time-automatic (no gas test possible!)
• LON-Variable CMFUNC
It is also possible to cancel a running system calibration. This can be done by the following
instances:
• Manually by operator interaction
• Triggered by programmable input (DIO)
• AK-protocol command
• LON-Variable CMFUNC
There is no priority by which way SYSCAL can be started. If SYSCAL was started it cannot
be restarted by a further instance. Only after canceling it can be restarted.