Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 185)

<3. Basic Operation and Startup>
3-34
IM 11B08A01-01E
3.3 Normal operation (continuous
measurement of process sample)
After fi nishing the procedures above, do the normal operation.
3.3.1 Setting Stream sequence
Unless otherwise specifi ed, streams are set at the factory in descending order in Stream
sequence 1. To change the number of times, order, etc. of the stream to be measured, change
the setting of Stream sequence. For the change method, see 5.1.2 Operation of Stream
Sequence.
3.3.2 Setting pressure and fl ow rate of process samples
Set the pressure and fl ow rate of a sample in each stream according to the following procedure.
For set values of pressure and fl ow rate, see the Operation data.
 Automatic stream valve
(1) Change the user level.
(2) Press
the (OPR) in the navigation bar on the analyzer operation screen.
(3) Open the GCM tab.
(4) Set the operation mode to Manual.
(5) Press GCM VLV Control in the GCM tab.
(6) Press ON/OFF under Str VLV.
(7) Press ON and select the number of the valve to be operated, and then press OK.
(8) The message “Turn on the stream valve number *” appears on the screen, and then press
Yes.
(9) The stream valve switches.
(10) Adjust the throttle valve of the sample process section and set the pressure and fl ow rate of
the process sample.
Repeat steps (7) to (10) to set the pressure and fl ow rate of all process sample streams.
(11) After fi nishing the setting of the pressure and fl ow rate of the process samples, operate the
stream valve again to turn it off.
 Manual stream valve
(1) Confi rm that the operation mode is not Run.
(2) Confi rm that all stream valves are closed.
(3) Manually open the stream valve of the sample process section.
(4) Adjust the throttle valve of the sample process section to set the pressure and fl ow rate of
the process sample.
Repeat steps (2) to (4) to set the pressure and fl ow rate of all process sample streams.
(5) Open only the stream valve to be used, and confi rm the pressure and fl ow rate of process
samples.
3.3.3 Starting operation
Start operation according to the following procedure. When the operation mode is not Stop,
change the operation mode to Stop and follow the procedure below:
(1) Change the user level.
(2) Press
the (OPR) in the navigation bar on the analyzer operation screen.
(3) Open the GCM tab, and set the operation mode to Process.
2nd Edition : May 11, 2012-00