Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 186)

<3. Basic Operation and Startup>
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IM 11B08A01-01E
(4) Press Stream sequence and select a Stream sequence number to be measured, and then
press OK.
(5) Press Run in Operation mode. The operation mode becomes Run and the measurement of
the sample in the specifi ed stream starts.
3.3.4 Stopping operation
Stop operation according to the following procedure:
(1) Change the user level.
(2) Press
the (OPR) in the navigation bar on the analyzer operation screen.
(3) Open the GCM tab.
(4) Press Stop in Operation mode. After the measurement of the stream is fi nished, the
operation mode becomes Stop and the measurement of the sample of the specifi ed stream
stops. To cancel the Stop mode, press Cancel button.
IMPORTANT
To stop supplying the power after the operation stops, follow the procedure below. Otherwise, it
may damage the detectors, columns, etc.
(1) As for TCD, turn off TCD and leave it for at least four hours until it cools. For this procedure,
see 3.2.4 On/Off operation of detectors.
As for FID, FID with a methanizer, or FPD, stop the supply of combustion hydrogen or
nitrogen and combustion air (close the main valve of the cylinder) while continuing the
supply of carrier gas. Leave the detector for at least four hours after combustion stops.
(2) Turn off the heaters of the isothermal oven, LSV, and FPD while continuing the supply of
carrier gas. For this procedure, see Procedure to Turn off the Heater below. Leave the
isothermal oven for at least one hour until it cools.
(3) Stop the power supply.
Continue the supply of carrier gas.
 Procedure to Turn off the Heater
(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) Open the SYS tab.
(6) Press
Temperature Controller.
(7) When the ON/OFF button is pressed, the message “Are you sure you want to turn off the
temperature controller?” appears on the screen, and then press Yes.
3.3.5 Checking data in upper systems
If GC8000 communicate with or transfer signals to/from upper systems, confi rm that the
measured value of GC8000 is identical to the indication of the system.
3.3.6 Storing parameters
Read parameters from the GC8000 settings and store the initial parameters at startup.
2nd Edition : May 11, 2012-00
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