Yokogawa In-Situ Gas Analyzer TDLS200 - Manual (Page 33)

4-14
IM 11Y01B01-01E-A 6th Edition :Feb 13, 2013-00
<4. ANALYZER COMPONENTS> TDLS200 TDL Analyzer Instruction Manual V2.1
Page 34 of 131 - 34 -
Purging Analyzer for Safe Area
The block diagram below shows the sections of the analyzer that require nitrogen purging. The
purging should be carried in sequence typically as shown below.
Figure 12 - Purging for Safe Areas
Purging Analyzer for Hazardous Areas
ƒ Z-Purged designed in accordance with NEC/CSA Class 1, Division 2, Groups A-D
ƒ ATEX Zone 2 CAT 3 (Certified)
The block diagram below shows the sections of the analyzer that require nitrogen purging. A Z-
Type purge control system is fitted the Main Electronics Housing and it includes a local indicator
and pressure switch alarm contacts. The purging should be carried in sequence typically as shown
below.
Figure 13 - Purging for Hazardous Areas
Main
Electronic
Housing
Laser
Module
Check Gas
Flow Cell
Process Interface
Process Interface
Detect
Module
Detect
Electronic
Housing
Nitrogen or I/A Purge
Gas
Nitrogen or I/A Purge
Gas
Main
Electronic
Housing &
Purge
System
Laser
Module
Check Gas
Flow Cell
Process Interface
Process Interface
Detect
Module
Detect
Electronic
Housing
Nitrogen or I/A Purge
Gas
Nitrogen or I/A Purge
Gas
Purging Analyzer for Safe Area.
The block diagram below shows the sections of the analyzer that require nitrogen purging. The purging should
be carried in sequence typically as shown below.
Purging Analyzer for Hazardous Areas
• NEC/CSA Class 1, Division 2, Groups A-D
• ATEX Zone 2 CAT 3
The block diagram below shows the sections of the analyzer that require nitrogen purging. A Z-Type
purge control system is fitted the Main Electronics Housing and it includes a local indicator and pressure switch
alarm contacts. The purging should be carried in sequence typically as shown below.
Figure 17 – Purging for Safe Areas
Nitrogen or I/A Purge
Gas
Laser
Module Detect
Module
Figure 18 – Purging for Hazardous Areas
TDLS200 TDL Analyzer Instruction Manual V2.1
Page 34 of 131 - 34 -
Purging Analyzer for Safe Area
The block diagram below shows the sections of the analyzer that require nitrogen purging. The
purging should be carried in sequence typically as shown below.
Figure 12 - Purging for Safe Areas
Purging Analyzer for Hazardous Areas
ƒ Z-Purged designed in accordance with NEC/CSA Class 1, Division 2, Groups A-D
ƒ ATEX Zone 2 CAT 3 (Certified)
The block diagram below shows the sections of the analyzer that require nitrogen purging. A Z-
Type purge control system is fitted the Main Electronics Housing and it includes a local indicator
and pressure switch alarm contacts. The purging should be carried in sequence typically as shown
below.
Figure 13 - Purging for Hazardous Areas
Main
Electronic
Housing
Laser
Module
Check Gas
Flow Cell
Process Interface
Process Interface
Detect
Module
Detect
Electronic
Housing
Nitrogen or I/A Purge
Gas
Nitrogen or I/A Purge
Gas
Main
Electronic
Housing &
Purge
System
Laser
Module
Check Gas
Flow Cell
Process Interface
Process Interface
Detect
Module
Detect
Electronic
Housing
Nitrogen or I/A Purge
Gas
Nitrogen or I/A Purge
Gas
Nitrogen or I/A Purge
Gas
Laser
Module Detect
Module