Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 67)

<1. Overview>
1-40
IM 11B08A01-01E
Table 1.7
Validation stream Measurement frequency Automatic validation
Validation 1 Stream 8 2 Invalid
(2) Operation in the stream sequence status
• Streams are measured in series in a preset sequence.
• The measurement status is set to “Stream sequence” when the equipment is turned on.
• Eight patterns of stream sequence can be stored. To select a sequence, touch the “Stream
sequence” button to open the selection window on the GCM operation status screen on the
analyzer operation display (Figure 1.20).
Users at Level B or higher are allowed to select stream sequences and change the
measurement status.
• A sequence of up to 31 streams can be specifi ed in sequence for each stream sequence.
To defi ne a sequence, touch the “Stream sequence setting” button to open the setting
window on the GCM operation status screen on the analyzer operation display (Figure 5.3)
or defi ne it on the “Stream sequence setting” screen on the EtherLCD (Figure 1.21).
Users at Level C or higher are allowed to defi ne stream sequences.
• When a command is issued to change the measurement status to the stream sequence
status during the pause mode in the stream sequence status or the stream specifi cation
status, the measurement status is changed to the requested status but the operation mode
changes to the stop mode and valves are all turned off. Then change the operation mode (to
the run mode or pause mode).
• If a run command is issued while a completely undefi ned stream sequence is selected,
an “ALM#455: Failed to change measurement status, Level 3” alarm is activated and the
measurement status is not changed.
2nd Edition : May 11, 2012-00