Yokogawa IR200 - Manual (Page 18)

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IM 11G02M01-01E
(7) Example of sampling system configuration
The system configuration may vary depending upon the nature of measured gas, coexistent gases
or application. A typical configuration diagram is shown in Fig. 3-2. Since a system configura-
tion depends upon measured gas, consult with Yokogawa.
Fig. 3-2 A typical example of sampling system
Pump
4-way selector
cock
Primary filter
Safety
drain
trap
Electronic
dehumidifier
Drain
pot
Standard gas
for zero calibration
Standard gas for
span calibration
Ball valve
Drain
Sample
gas inlet
Flow meter
Exhaust
(atmospheric
pressure)
Secondary
filter
Gas
analyzer
(IR200)
External
O 2 analyzer
F03.EPS
1
6
2
3
5
4
7
8
9
10
Measurement of sample gas with low moisture content (room-temperature saturation level or below):
CO, CO
2
and CH 4 measurement
ء ء A dehumidifier must be used for CO (0-200 ppm)
and SO
2 measurements (to prevent saturation at
2 Њ C). Even in any other gas measurements, if
sample gas has a high moisture content or if
condensation is likely to occur, a safety drain trap
and a dehumidifier should be used.
ء
Pump
Primary filter
Safety
dran trap
Electronic
dehumidifier
Drain
pot
Standard gas
for span calibration
Ball valve
Drain
Flow meter Secondary filter
Gas analyzer
(IR200)
External O 2
analyzer
Measurement of sample gas with high moisture content or NO, SO
2
, or CO (0-200 ppm range) measurement
A dehumidifier must be used for NO, SO 2 , and CO (0-200 ppm) measurements (to prevent
saturation at 2 Њ C). Use either atmospheric air or cylinder gas as a zero calibration gas and
supply it through a bubbler (humidifying) to reduce interference of water.
Atmosphere
NO 2 /NO
converter
Pump ء
ء
3-way
solenoid valve
Solenoid
valve
Solenoid
valve
Bubbler
Exhaust
(atmospheric pressure)
Solenoid
valve
Standard gas
for zero calibration
p
1
2
3
3
4
5
6
8
8
9
14
14
14
10
12
14
11
13
No. Item Description
Primary filter (mist filter) Remove dust and mist
Safety drain trap
Pump
Electronic dehumidifier
Drain pot
Ball valve
4-way selector cock
Standard gas for calibration
Flow meter
Separate and discharges drain
Suck in sample ga
Dehumidify sample gas
Collect discharged water from dehumidifier
Used for discharging drain
Used for switching sampling and calibration lines
Used for zero/span calibration
Adjust and monitor sample gas flow rate
Secondary filter (membrane filter) Remov fine dust
T03.EPS
NO 2 /NO converter Convert NO 2 gas into NO gas
3-way solenoid valve Used for introducing humidified gas
Bubbler Humidify calibration gas
Solenoid valve Used for switching sampling and calibration lines
1
2
3
4
5
6
7
8
9
10
11
12
13
14