Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 113)

<1. Overview>
1-86
IM 11B08A01-01E
The following table shows processing designation of peak individual settings for the tracking
(correction) target.
Processing designation Tracking
specifi cation
Tracking
(correction)
items
Stream type Concentration
calculation
Type Details
Peak processing External Tertiary No tracking
Tracking
Standard*1
Gate ON time
Gate OFF time
Calibration,
Measurement,
Validation
Standard
External straight
line
Calibration,
Measurement,
Validation
Indirect method Calibration,
Measurement,
Validation
Standard,
Correction area
fraction
Calculation
processing
Base level No tracking
Tracking
Operation time Calibration,
Measurement,
Validation
*1 “No tracking” or “Tracking” is settable for tracking specifi cation when the gate processing method is “Zone gate.” Only the setting
for zone gate head peak becomes valid for tracking specifi cation.
11/03/22
15:15:45
Peak Setup-Specifi c (4/5)
Stream #1 Peak #1 External 3rd
> - Auto tracking req Tracking std
- Peak std time 100.0 s
- Tracking coef a 1.0
- Tracking coef b 0.0
Menu Copy1 Copy2 Atm Strm# Peak#
F1 F2 F3 F4 F5 F6
Figure 1.44 Tracking specifi cation and tracking factor a/b in peak individual setting (GC-HMI
EtherLCD)
 Tracking factor a/b
Tracking factor a/b is a factor to perform correction of gate ON/OFF time and operation time of
base level processing by straight-line approximation. When the tracking factor b is 0, proportional
correction by tracking factor a is performed.
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Gate ON time after tracking = Gate ON time × Tracking factor a + Tracking factor b
Gate OFF time after tracking = Gate OFF time × Tracking factor a + Tracking factor b
Base level operation time after tracking = Base level operation time × Tracking factor a + Tracking
factor b
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Tracking factor a/b can be obtained by auto-calculation or by entering a set value.
To obtain tracking factor a/b by auto-calculation, set “Update” for “Automatic renewal of tracking
factors” of SYS method. Automatic renewal of tracking factor a/b is performed after completion of
peak detection of all the peaks for the relevant SYS method but before correction of gate ON/
OFF time and operation time of base level processing.
Refer to the following items to fi nd the details of automatic renewal of tracking factor a/b.
2nd Edition : May 11, 2012-00