Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 80)

<1. Overview>
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IM 11B08A01-01E
● In the case where a pause command is received during the run mode in the stream
specifi cation status [2H2]
The operation mode is immediately prepared to be changed to the pause mode in the
stream specifi cation status.
The operation mode changes to the pause mode in the stream specifi cation status at a
preset time during the measurement of the currently-measured stream.
The pause command can be canceled with a cancel command until the operation mode
changes to the pause mode.
● In the case where a run command is received during the pause mode in the stream
specifi cation status [2G6]
The suspended measurement is resumed.
Run Run Pause
Rest of W1
Rest of S1
W1 W1 W1
S1 S1 S1
W1
S1
W1 W1
S1
Time
Stream sequence 1
Run command
[2H2] [2G6]
Pause command
(4) Calibration and validation
Three types of calibration and validation methods are available as follows.
Manual Selection of a calibration (or validation) number, switching of stream valves to fl ow the
standard sample, and issue of a calibration (or validation) start command are all performed
manually.
Semiautomatic Once a calibration (or validation) number is selected, stream valves are automatically
switched to fl ow the standard sample, then calibration (or validation) starts automatically.
Automatic Stream valves are automatically switched to fl ow the standard sample, then calibration (or
validation) starts automatically at a preset date, time, and interval. The preset calibration (or
validation) patterns of which automatic execution is enabled are automatically executed.
The details of these three types of calibration and validation are described below.
(a) Manual calibration
• To select the calibration (or validation) method, touch the “Calibration (validation) method”
button to open the selection window on the GCM operation status screen on the GC-HMI
analyzer operation display (Figure 1.23) or select it on the “Calibration/validation setting”
screen on the EtherLCD (Figure 1.24). A set of stream numbers and the numbers of times
of measurement is specifi ed for each of Calibration 1 to 6 and Validation 1 to 6 on the
“Calibration/validation setting” screen on the EtherLCD. Users at Level C or higher are
allowed to select the calibration (or validation) method.
• Next, issue a command to change the measurement status to a preset status among
Calibration 1 to 6 or Validation 1 to 6 on the calibration (validation) window on the GCM
operation status screen. Calibration (or validation) numbers for which stream numbers are
not specifi ed are not in the options. If there is no calibration (or validation) numbers for which
stream numbers are specifi ed, the operation button is invalid and is displayed in gray.
Select a calibration (or validation) number, and then touch the “OK” button. Then the
waiting measurement status is changed to the selected calibration (or validation) number
on the overall GCM information screen. Users at Level B or higher are allowed to select the
calibration (or validation) number.
Users at Level C or higher can cancel the command to change the measurement status
to the specifi ed calibration (or validation) status until the waiting measurement status is
changed to the selected calibration (or validation) number and the measurement of the
currently-measured stream is completed.
2nd Edition : May 11, 2012-00
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