Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 357)

<6. Maintenance>
6-4
IM 11B08A01-01E
(3) When cleaning inside of a pipe, do not use any solvent containing non-volatile impurities, as
they will contaminate inside of the pipe and will prevent normal analysis. This contamination
might necessitate parts replacement to restore the system to normal.
When the pipes need to be cleaned, use highly-pure acetone.
(4) After replacing piping parts, always perform leak tests.
This section shows the replacement procedures for the maintenance (replacement) parts that are
used in the following sections of GC8000.
1. Protection system
2. Electronics section
3. Pressure and fl ow control section
4. Isothermal oven
5. Sample processing section (GCSMP)
Protection system A
(2)
Control Unit
Electronics
section
(1)
Protection System
(2)
Electronics section
(4)
Isothermal Oven
(5)
Sample Processing
Section
Oven Unit 1
Electronics
section
Oven Unit 2
Electronics
section
(3)
Pressure
and Flow
Control
Section
Control Unit
Pressure and
Flow Control
Section
Oven Unit 1
Pressure and
Flow Control
Section
Oven Unit 2
Pressure and
Flow Control
Section
Protection system B
Control Unit
Analyzer Base
Sampling Unit (GCSMP)
Display
(3)
Pressure Control
Section
(2)
EPC Box
Oven Unit 1
Large
Isothermal Oven
Oven Unit 2
Isothermal Oven
Figure 6.1
Confi rm the location of each replacement part referring to Figure 6.1.
6.2.1 Parts for the Protection system
The instructions for replacing parts in the protection system are explained.
(1) Pressure switch
(2) Fuse
(3) Relay and Relay board
There are 2 types of protection systems depending on type of GC8000, as shown in Fig. 6.2. No
enclosure is mounted for FM/CSA explosionproof Y-purge type.
2nd Edition : May 11, 2012-00