MULTI-CHANNEL ZIRCONIA OXYGEN ANALYZER
DATA SHEET
This oxygen analyzer measures at multiple points the
oxygen concentration included in the exhaust gas from a large
boiler, and simultaneously outputs the average value of the
concentrations.
Since the distribution of oxygen concentration in exhaust
gas is not uniform with a large boiler such as found in a power
plant, the concentration is measured at multiple points in a
flue. These values are averaged to provide an optimum
oxygen concentration signal which is necessary for
combustion control.
The converter (ZRN) will accept inputs from up to nine
direct-insertion type zirconia oxygen detectors (ZFK), and
carries out computations such as averaging of signals from
the detectors.
The detectors are available in general-use, anticorrosive
and high-temperature types for selection according to the
customer's intended use.
ZRN, ZFK
General-use detector
High-temperature detector
FEATURES
1. Up to nine detectors connectable
3, 6 or 9-channel configuration is selectable, and channels
are freely usable within the selected number. Addition of
channel unit allows expansion in units of 3 channels (9
channels max.).
2. Interactive setting of parameters
Various parameters for measurement and maintenance
are easily settable through interaction with the liquid
crystal display.
3. A variety of output signals
Available as analog output are 3 sets of average-value
outputs (average values from desired channel combi-
nation) and oxygen concentration output for each channel.
Also there are 4 contact outputs per channel and 7 contact
outputs common to all channels. All of the analog outputs
are isolated.
4. Full complement of maintenance functions
Auto calibration function and manual/auto blow-down
function are standard-equipped. A self-diagnosis function
for the main unit facilitates taking a remedy at the
occurrence of a fault.
5. Sampling device is unnecessary
Gas sampling devices such as gas aspirator and
dehumidifier are unnecessary since the detector is a
direct-insertion type. The detector is available in a high-
temperature type for measurement of hot gases up to
1590°C and an anticorrosive type for measurement of
strongly corrosive gas from a garbage incinerator.
Converter
SPECIFICATIONS
General
Measuring object:
Oxygen contained in noncombustible
gas
Measuring principle:
Direct-insertion zirconia system
Measuring range:
0 to 2
……
50 vol% O
2
, freely settable
(in 0.5% O
2
steps)
Repeatability:
Within
±
0.5% of max. output signal
Linearity:
±
2% of full scale
Response time:
Within 7 sec for 90% response (from
calibration gas inlet)
Power supply:
100, 115 or 220VAC, 50/60 Hz
Power consumption:
Approx. 50VA + 50VA x No. of channels
(at steady state of general-use detector)
Approx. 50VA + 200VA x No. of channels
(at startup of general-use detector)
Warmup time:
Approx. 15 minutes
Oxygen detector (Type ZFK2,5), Ejector (Type ZTA)
Measuring detector:
For general-use: ZFK2
For corrosive gas: ZFK5
EDS3-212a
Date
Apr. 30, 1997
ZRN, ZFK
Measured gas temperature:
Flow guide tube system; –20 to +600°C
(for general-use, corrosive gas)
Ejector system; –20 to +1590
°C
(for
high-temperature gas)
–20 to +800°C (for general-use)
Measured gas pressure:
–3 to +3kPa (–306 to +306mmH
2
O)
Flow guide tube:
With or without blow-down nozzle
Flange; JIS5K 65A FF
(JIS5K-80AFF for high particulate gas)
Insertion length; 0.3, 0.5, 0.75, 1m
(0.8m for high particulate gas)
Ejector (general-use):
Probe for guiding measured gas to de-
tector
Flange; JIS10K 65A RF
Insertion length; 0.5, 0.75, 1, 1.5m
(according to customer's specification)
Ambient temperature:
–20 to +60°C for cable section
–5 to +100°C for ejector section
125°C or less at detector flange surface
with power applied
Structure:
Dust/rain-proof structure(IEC IP55
equivalent)
Filter:
Alumina(filtering accuracy 50µm) and
quartz paper
Main materials of gas-contacting parts:
General-use detector; Zirconia, SUS316,
platinum
Anticorrosive detector; Zirconia, tita-
nium, platinum
Flow guide tube; SUS304 or SUS316
Ejector (general use);SUS316, SUS304
Ejector; (for high temperature) SiC,
SUS316, SUS304
Calibration gas inlet:
Polypropylene or brass joint
Reference air inlet (option):
Rc1/8 or NPT1/8
Detector mounting:
Horizontal plane
±
45°, ambient sur-
rounding air should be clean
Outer dimensions:
(L x max. dia.) 210mm x 100mm
(detector)
Mass{weight}:
Detector; approx. 1.6kg
Ejector; approx. 15kg (insertion length
1m)
Flow guide tube (general-use, 1m);
approx. 5kg
Finish color:
Munsell N9.5 (silver) and SUS metallic
color
Ejector air inlet flow rate:
5 to 10N/min
Blow-down air inlet pressure:
200 to 300kPa (2.04 to 3.06kgf/cm
2
)
Ejector exhaust gas processing:
Within furnace, returned to flue
Heater temperature drop alarm output (ejector):
Alarm output when below +100
°C,
mechanical thermostat, 1N.O. (a) con-
tact of 200V AC 2A
Oxygen converter (Type ZRN)
0 to 2
……
50 vol% O
2
, freely settable
(in 0.5% O
2
steps)
Indication:
Oxygen concentration; 3-digit indication
by LED
Operation/setting display; 16 digits x 2
rows on LCD
Measurement channel status; 12 x 2
colors by LED
Oxygen concentration output signal per channel:
4 to 20mA DC (allowable load resistance
500
Ω
or less)
or 0 to 1V (output resistance 100
Ω
or
less), isolated output, linear
Average-value output signal (3 points):
4 to 20mA DC (allowable load resistance
500
Ω
or less)
or 0 to 1V (output resistance 100
Ω
or
less), isolated output, linear
Contact output signal:
(1) Independent per channel (4 points)
Unit alarm (contact closed during normal
measurement)
H/L alarm (contact closed when setpoint
exceeded)
Under calibration (contact closed during
calibration)
Under blow-down (contact closed during
blow-down)
(2) Common to all channels (7 points)
Unit alarm (contact closed when all
intended channels are under normal
measurement)
Under maintenance (contact closed in
maintenance mode, setting mode,
during auto calibration and during blow-
down)
Zero valve (contact closed during zero
calibration)
Span valve (contact closed during span
calibration)
H/L alarm A (contact closed when aver-
age-value output A exceeds set- point)
H/L alarm B (contact closed when aver-
age-value output B exceeds setpoint)
H/L alarm C (contact closed when aver-
age-value output C exceeds setpoint)
(3) Contact specification:
1N.O.(a) 250V AC 2A, 24V DC 2A
Contact input signal:
Auto calibration start (auto calibration
starts when contact opens)
Calibration disable (calibration disabled
when contact closes)
Contact specification; isolated contact
input, ON at 1kΩ or less
Auto calibration:
Zero and span automatically calibrated at
preset cycle; calibration gas supplied in
succession by driving external solenoid
valve
Calibration cycle; 0.1 to 99.9days
Calibration gas flow time; 1 to 9minutes
Auto calibration channel; freely settable
Output range:
2
Calibration gas concentration setting:
Settable range; 0.100 to 50.000% O
2
(Zero: Up to 22.000% O
2
)
Density of recommended calibration gas
Zero: Less than 10%/residual N
2
(more
than 0.15 vol.% O
2
) of full scale
Span: 80 to 100%/residual N
2
of full scale
Blow-down:
A function for blowing out via com-
pressed air the dust that has deposited in
the flow guide tube.
Blow-down can be performed for a pre-
determined time and at predetermined
intervals.
Blow-down cycle; 0.1 to 99.9hours
Blow-down time; 0.1 to 9.9minutes
Blow-down channel; freely settable
Output hold:
Output is held during maintenance,
setting, auto calibration and blow-down.
The hold function can also be released.
Transmission function (option):
Via RS-485 interface
Half-duplex bit serial transmission, start-
stop synchronization.
Remark: When connecting via an RS-
232C interface, then a 232 485 con-
verter should be used.
Self-diagnosis function:
Provided for detector temperature fault,
zero calibration fault, span calibration
fault, internal communication fault
Ambient temperature:
–10 to +50°C
Ambient humidity:
90% RH or less
Power supply:
100, 115 or 220V AC, 50/60Hz
Structure:
Dust-proof, rainproof structure ( corre-
sponding to IP53 of IEC)
Material:
Made of steel
Outer dimensions (H x W x D):
221 X 482.6 X 380 (rack/panel mounting
type)
221 X 400 X 380mm (pipe stand mount-
ing type)
Mass{weight}:
Approx. 18kg (excluding cable and de-
tector)
Finish color:
Munsell 5Y 8/1
Mounting method:
Mounted on pipe stand, mounted flush
on panel or on 19inch rack
3
ZRN, ZFK
CODE SYMBOLS
(Detector)
4 5 6 7 8
9 10 11 12 13
14
(Ejector)
1 2 3 4 5 6 7 8
ZFK
2
5
R
1
2
1
3
4
Description
Application
General use
For corrosive gas (refuse incinerator)
Kinds
Standard
Cal. gas inlet
Polypropylene joint for
φ6mm
tube
Brass joint for
φ1/4
inch tube
Power supply
100/115VAC 50/60Hz
200/220VAC 50/60Hz
Flow guide tube
flange
application
None
SUS304 general use
SUS304 general use
SUS304 general use
SUS304 general use
SUS316 for corrosive gas
SUS316 for corrosive gas
SUS316 for corrosive gas
SUS316 for corrosive gas
SUS316 with blow-down nozzle
SUS316 with blow-down nozzle
SUS316 with blow-down nozzle
SUS316 with blow-down nozzle
SUS316 for high particulate
SUS316 for high particulate with
cover
Otheres
Y
A
Y
A
B
Z
Protection cover
Without
With
Reference air inlet
None
Rc1/8
NPT1/8
None-standard spec.
Other none-standard items
length
300mm
500mm
750mm
1000mm
300mm
500mm
750mm
1000mm
300mm
500mm
750mm
1000mm
800mm
800mm
Z T A
1
2
1
1
Description
Measured gas temperature
For high temperature (1590°C max.)
General use (800°C max.)
B
C
D
E
1
3
Insertion length [mm]
500
750
1000
1500
Power supply
100V/115V AC 50/60Hz
200V/220V AC 50/60Hz
(Converter)
1 2 3 4 5 6 7 8
9
0Y0
5A3
5A5
5A7
5A1
5B3
5B5
5B7
5B1
5C3
5C5
5C7
5C1
6D8
6E8
ZZZ
Z RN
3
6
9
B
E
0
1
1
2
3
1 -
Description
No. of measurement channels
3 channels max.
6 channels max.
9 channels max.
Output signal
4 to 20mA DC
0 to 1V DC
Transmission function
None
with RS-485
Power supply
100V AC 50/60Hz
115V AC 50/60Hz
220V AC 50/60Hz
1
2
Mounting method
Mounting flush on panel/on 19inch rack
Mounted on pipe stand (pipe stand provision
is excluded)
(Exclusive special cable)(*1)
1 2 3 4 5 6 7 8
9
Z R ZN
N
R
1 -
Description
Connectable devices
For ZRN
Kinds
For R thermocouple
( Replacement Detector element)
4 5 6 7 8
9 10 11 12 13
ZFK
2
5
4
0 Y 0 Y Y
Description
Application
General use (TC516041)
For corrosive gas (refer to incinerator)
(TC516042)
R
6
7
1
3
Kinds
Standard
Cal. gas inlet
Polypropylene joint for
φ6mm
tube
Brass joint for
φ1/4
inch tube
Power supply
100/115VAC 50/60Hz
200/220VAC 50/60Hz
YA
YB
YC
YD
YE
YF
YG
YH
YJ
YK
YL
YM
AA
BB
CC
DD
0
1
2
Conduit(*2)
None
None
None
None
None
None
None
None
None
None
None
None
6m
10m
15m
20m
Cable length
6m
10m
15m
20m
30m
40m
50m
60m
70m
80m
90m
100m
6m
10m
15m
20m
Cable end treatment
None
One side (detector side)
Both sides
Notes: *
(1) One cable is used for one detector.
(2) Waterproof flexible type conduit.
4
SCOPE OF DELIVERY
Detector:
Detector main unit x 1, Viton O ring x 2,
mounting screw (M5mm x 16) x 6,
thermal sticker x 1, flow guide tube (as
specified) x 1, ceramic filter x 1, rainproof
cover (as specified) x 1
Converter:
Converter main unit x 1, mounting
bracket set, (according to specification) x
1 accessories (3A fuse x 3)
Ejector:
Ejector main unit x 1, insertion tube x 1,
M16mm nut, and washer x 4, packing x 1
Items to be prepared separately:
(1) Calibration gas unit
Code
used
TK7D5853C.
1 2 3 4 5
(2) Standard gas for calibration
Type ZBM NSH4-01 (up to 5% range)
ZBM NSJ4-01(over 5% range)
(3) Reducing valve for standard gas (type ZBD61003)
(4) For blow-down
• 2-way solenoid valve
ADK11-15A-02C-100/200VAC (supplied by CKD Co.,
Ltd.), connection port dia. Rc1/2
• Reducing valve AW4000-N04BG (supplied by SMC Co.,
Ltd.), connection port dia. Rc1/2
(5) Flowmeter (type ZBD42403)
1 to 10N/min for ejector
6
Panel/19inch
(3) (6) (9)
rack mount
Pipe mount
(3) (6) (9)
(Number of "ch")
DEVICE CONFIGURATION
The device to be combined differ according to the conditions of the gas to be measured. Select the devices to be combined
with reference to the following table.
Measured gas
Application
General-use
(boiler)
Temperature Gas Flow
DUST
Protection Note
cover
Fuel; gas, oil
Fuel: coal
with blow down
For corrosive 600°C or less 5 to 20m/s Less than 1g/Nm
gas (refuse
incinerator)
Less than 25g/Nm
Less than 25g/Nm
General-use
(boiler)
1590°C or
less
800°C or less Less than
1m/s
Less than
1m/s
Less than 1g/Nm
3
3
3
3
Device configuration
Detector type
ZFK2R
ZFK2R
ZFK5R
ZFK5R
ZFK5R
4-
4-
4-
4-
4-
4-
5
5
Converter Ejector
type
type
A
C
B
C
D
E
ZRN
ZRN
ZRN
ZRN
ZRN
ZRN
ZRN
ZRN
ZTA2
ZTA1
—
—
—
—
600°C or less 5 to 20m/s Less than 0.2g/mm
3
—
Less than 10g/Nm
3
—
—
—
no
yes
—
—
Included low moisture
Included low moisture
with blow down
Included low moisture
with blow down
5
5
Less than 10g/Nm
6
3
Included high moisture ZFK5R
with blow down
SUS316 tube
with blow down
SIC tube
with blow down
ZFK2R
ZFK2R
6
Less than 1g/Nm
3
4-OYO
4-OYO
Note (1) Dust volume is approximate value.
(2) Instrument quality air or bottled air is available as reference air by selecting detector with reference air inlet.
CAUTIONS
•
If combustible gas (CO, H
2
etc.) exists in the measured
gas, error will occur due to burning at the sensor section.
The inclusion of corrosive gas (Si vapor, alkaline metal, P,
Pb etc.) will shorten the life of the sensor.
•
When the measured gas temperature is high (300°C or
higher), the flange should be separated from the furnace
wall in order to bring the detector flange surface
temperature below the specified value(125°C). The flow
guide should be attached in the direction in which the gas
flow to the detector decreases.
•
•
When much dust is included in the gas, the flow guide
tube should be attached at an inclination so that the flow
goes from above to below. And the flow guide should be
attached in the direction in which the gas flow to the
detector decreases.
In the case of a refuse incinerator, automatic blowback of
the flow guide should not be performed (to prevent
corrosion of the flow guide tube due to drainage). Blow-
down should be performed manually when change in the
indication has become very little with the furnace
stopped.
5
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