INFRARED GAS ANALYZER FOR STACK GAS
DATA SHEET
ZSU-5
This analyzer consists of an infrared gas analyzer, an O2 sen-
sor and a gas sampling device. It is used for simultaneous
and continuous measurement of the NOX, SO2, CO, CO2 and
O2 components in the flue gas of various boilers, garbage
incinerators, etc.
For CO and O2 measurement specifications, the function for
coping with the Japanese regulation on dioxin emission is
incorporated.
FEATURES
1. Gas concentrations of 5 components is measurable simul-
taneously and continuously
NOx, SO2, CO and CO2 gas concentration measurements
are integrated by infrared method, to which a zirconia or
magnetic type O2 sensor is added for O2 measurement.
Therefore, the gas concentrations of 5 components are
simultaneously and continuously measurable.
2. The use of highly sensitive and reliable mass flow detec-
tor allows the range ratio of up to 1:25 with the standard 2
range.
3. Maintenance can be performed from the front side, thus
saving the installation space.
Unitized structure of the analyzing block and gas sampling
module enables better maintenance.
•Analog output signals :
Simultaneous output of signals of 4 to
20 mA DC each (non-isolated or isolated
depending on customer’s code selec-
tion)
4.Provided with abundant functions including O2 correc-
tion output, average value output, automatic calibration,
CO peak count alarm, automatic range changeover, and
alarms.
• Five instantaneous value outputs (NOX,
SO2, CO, CO2 and O2)
• Three instantaneous values (NOX, SO2,
CO) after O2 correction when provided
with O2 sensor
• Three average values (NOX, SO2, CO) af-
ter O2 correction when provided with O2
sensor
5.N2O and CH4 can also be measured as an optional feature.
Having warming effect 300 times as high as that of CO2,
N2O is the greenhouse gas most controversial now.
SPECIFICATIONS
1. Standard Specifications
•Measuring system :
• Allowable load resistance :
550 Ω or less (750 Ω or less for isolated
output)
NOx, SO2, CO and CO2 ; Ndir type infra-
red
O2 ; Zirconia type, magnetic type
•Measurable component and min./max. measurement
•Contact output: (1)Each 1a contact (contact capacity
250 V AC, 2 A or 30 V DC, 3 A) for:
• Range identification of each component
(Close/1st range) , analyzing block error,
calibration error, auto calibration status,
maintenance status,and CO peak count
alarm
range :
NOX ; 0 to 50ppm/0 to 5000ppm
SO2 ; 0 to 50ppm/0 to 5000ppm
CO ; 0 to 50ppm/0 to 5000ppm
CO2 ; 0 to 10%/0 to 20%
O2 ; 0 to 10%/0 to 25%
N2O and CH4 can be measured as an
optional feature.
(2)Each 1c contact (contact capacity 250V
AC, 1 A or 30 V DC, 1 A) for:
• Concentration alarm for each compo-
nent’s instantaneous value (H, L, HL
settable), analyzing block power off
•Number of measurement ranges :
2 Maximum range ratio: 1:25 (Refer to
Code Symbols.)
•Warm-up time : Within 4 hours after power-on
EDS3-138b
Date Jun. 30, 2011
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