Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 407)

<6. Maintenance>
6-54
IM 11B08A01-01E
IMPORTANT
• During the purge, purge gas may fl ow into the sample return line, causing pressure
fl uctuation.
Prepare the sample return line and collection tank, if necessary.
• Prepare the sample return line so that the sample does not return.
CAUTION
The isothermal oven is extremely hot after turning off the power immediately. Keep the purging
air supplied for more than an hour after turning off the power. Keep hands away from the oven
components.
(5) Remove the four pipes connected to the fl owmeter.
(6) Loose the mounting screws at the base and remove the fl owmeter.
(7) Replace
the fl owmeter in the reverse order of steps (5) and (6).
(8) Confi rm that there are no leaks in the piping.
K9805WA, K9805WC for gas samples (Gasket: Viton)
K9805WE
for liquid samples (Gasket: Tefl on)
K9805WB, K9805WD for gas samples (Gasket: Tefl on)
K9805WF
for liquid samples (Gasket: Daiel Par-Flour)
F0247.ai
Nut 1
Taper tube
Gasket
Connector
Nut 2
Screw (two)
Base
Figure 6.47 Taper Tube
When replacing only the taper tube, follow the procedure below (see Figure 6.47).
(1) Stop the operation. (See “3.3.4 Stopping operation” for this procedure).
(2) Turn off the supply of the sample.
(3) If the sample is liquid, purge the sample line with the purge gas (nitrogen gas or instrument
air).
2nd Edition : May 11, 2012-00