Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 48)

<1. Overview>
1-21
IM 11B08A01-01E
 SYS
SYS is the smallest analysis unit with an independent analysis cycle. Up to six SYSs can be
set in the GCM. This enables the GCM to repeat the measurement of only components which
require relatively short-time analysis among the process stream component group, in a short
period of time. Respective SYSs in the same GCM synchronously analyze. SYSs in different
GCMs asynchronously analyze.
1.9 User Program Function
The user program function is to achieve a more complex and advanced value analyses and GC
operation, based on scripts created by the user. The script is described using an interpreter-type
language based on the YM-BASIC developed by Yodogawa. There are two timing options to
execute the script: at the end of peak detection and regular cycle.
Specifi c examples of functions achieved by the user program function are as follows:
• Calculations (temperature correction, atmospheric pressure correction, etc.) by acquiring
analog input or contact input from other analyzers
• Range changes depending on concentration values
• BTU value calculations
• Backup GC analysis start command when a malfunction arises in the main GC
* This function is optional. To use it, an UP card is necessary
1.10 Confi guration
1.10.1 Type and Appearance
The GC8000 Process Gas Chromatograph consists of a protection system*, control unit, oven
unit, and stanchion or analyzer base sampling unit (GCSMP)**.
* The specifi cation decides the number of the fl ameproof enclosure.
** A GCSMP can be mounted on the self-standing type. External sampling systems can be connected as
needed.
The oven unit can contain a large isothermal oven (volume: 40 L) or isothermal oven (31 L).
Thus, the GC8000 has four major models by type and number of oven units. Moreover, each
model comes with the self-standing type and wall-mounting type.
The control unit consists of the electronic section and the fl ow control section. In some
specifi cations, a 12-inch color LCD touch panel is mounted on the front as the GC-HMI.
Each oven unit can contain a large isothermal oven or isothermal oven and its pressure and
fl ow control section and electronic section. An EPC box is mounted in the electronic section
depending on the specifi cations.
The electronic section of the control unit and the electronic section of oven units 1-3 (including
the EPC box) connect with one another to form a single pressurized enclosure.
Refer to Figures 1.3 to 1.5.
2nd Edition : May 11, 2012-00
1