Stream Step; Valve On And Valve Off; Tic Mark; Skip Next Tcf On Alarm - ABB PGC2000 Operation And Service Manual

If any of the above conditions exist, an error will occur.

Stream Step

Stream Step begins the automatic sample purge of the sample stream being analyzed. It must occur
after completion of the sample inject for this stream. This is particularly important when the current
stream being analyzed requires multiple sample injections.
The analyzer samples the active streams in sequential order. However, you can change the order by
setting a random stream-stepping order (using the Random Stream Step table accessed from the
Commands screen).
You may request calibration, benchmark, or analysis of a specific stream at any time. The GCC
stacks and executes multiple stream analysis requests on a last in - first out basis following the next
stream step. The controller will step to any manually requested stream regardless of its
active/inactive status. Only after all requested stream analyses are completed does the controller
step to the next active stream in the routine sequence.
When the screen displays the desired method table, you can change the timing of the stream step or
add a stream step if the method table does not contain one.
Each method table must contain a stream step in order for the equipment to
operate properly. If a method table does not have a stream step, the controller will
continue to process the last-identified stream, repeating it until the purge stream is
manually changed or a stream step is inserted into the method table.

Valve On and Valve Off

Valve On and Valve Off control the operation of a selected valve. Each method table should contain
the valve on and off sequences required for the selected stream. The time of the first "Valve On" in a
method table is used in all reports as the sample inject time. Occasionally you may have to add a
valve on-off sequence, delete a sequence, or change the timing of a sequence.
To turn on a valve: access the method table, set the desired time to turn on the valve, and then select
"Valve On" and the valve number.
To turn off a valve: access the method table, set the desired time to turn off the valve, and then select
"Valve Off" and the valve number.

Tic Mark

This allows you to generate positive or negative event markers for the reconstructed chromatogram.
Tic marks identify a particular point in time on the chromatogram that you select. A tic mark can go
upward from the analysis line (positive) or downward (negative).

Skip Next TCF On Alarm

This allows you to skip the next time-coded function if any sensor alarm is active. This allows you to
bypass sample injection if the chromatographic sensors indicate that the analyzer is not operating
according to preset parameters, such as temperature.
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NOTE
NOTE
2000-OSM, F1