Yokogawa IR400 - Manual (Page 21)

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IM 11G02N01-01E
(1) Gas extractor
15
Drain Exhaust
2-way
solenoid
valve
Air
ZERO NO SO
2
CO O
2
CO
2
NO
/N
2
SO
2
/N
2
CO
2
/N
2
CO
/N
2
O
2
/N
2
Infrared gas analyzer
main unit CO,CO
2
(O
2
)
IR400
or larger
(10)
Zirconia
O
2
senor
φ 10/ φ 8
Teflon
tube
(ZX8D)
(2) Mist filter
(3) Safety
drain
trap
(4) Gas aspirator
Electronic
gas cooler
(5)
(8) Flowmeter
(7) Membrane filter
(7) Membrane filter
(11)
NO
2
/NO
converter
(6)
Solenoid
valve
Pressure
reducing valve
(9) Standard gas
Infrared gas analyzer
main unit NO, SO 2
Description
Gas extractor with a heating
type stainless steel filter of stan-
dard mesh 40 m
Removes drain, mist, and dust.
The safety drain trap divided
into two rooms for positive and
negative pressure. It monitors
and adjusts the sample gas pres-
sure.
For aspiration of sample gas
Dries the moisture in sample
gas to a dew point of approx.
2˚C.
Used for introducing calibra-
tion gas.
PTFE filter used to eliminate
fine dust particles and permit
monitoring of dust adhering
condition on the front panel of
the gas analyzer.
Name
(8) Flowmeter
(9) Standard gas
(10) Zirconia O
2
sensor
(11) NO
2
/NO con-
verter
Description
Adjusts and monitors the flow
rate of sample gas.
Reference gas used for calibrat-
ing zero and span of the ana-
lyzer. Total 6 cylinders required
for zero gas air, span gas NO,
SO
2
, CO, CO
2
and O
2
.
External zirconia oxygen
sensor used for measuring the
oxygen concentration in
sample gas.
(This is not necessary in case
when O
2
sensor is built-in.)
Added to NOx analyzer.
A special catalyst material for
efficient conversion of NO
2
gas to NO is used.
Name
(1) Gas extractor
(2) Mist filter
(3) Safety drain trap
(4) Gas aspirator
(5) Electronic gas
cooler
(6) Solenoid valve
(7) Membrane filter
3.4.6 Pressure at sampling gas outlet
Pressure at the sampling gas outlet should be adjusted to atmospheric pressure.
3.4.7 Example configuration of gas sampling system
The following illustrates a typical system configuration for five component gas measurement for
monitoring combustion exhaust gas from boiler, refuse incinerator, etc.
Contact Yokogawa for system configuration matching the particular use or further information.