PARAMAGNETIC OXYGEN ANALYZER
DATA SHEET
ZAJ
This product is an analyzer which measures oxygen concentration in a sample gas by converting it into pressure,
utilizing the magnetic property of oxygen.
When compared with the oxygen analyzers of other
measuring systems, this oxygen analyzer features a faster
response, and smaller influence by coexisting gas and combustible gas, etc.
Further, this analyzer is easy to use because of abundant
functions such as discretionary range setting and interactive operation. It is usable in diverse field including control
of various heat treating furnaces, combustion furnaces and
other various fields.
Within ± 1% of full scale/week
(in 10% or higher ranges)
Within ± 1.5% of full scale/week
(in ranges below 10%)
Span drift:
Within ± 2% of full scale/week
Flow rate of sample gas:
0.5L/min. or 1L/min
Response time (90% response: *Indication start-up time):
2sec or less (sample gas flow rate 1L/
min, range width 5%O2 or more)
3sec or less (sample gas flow rate 1L/
min, range width less than 5%O2)
3sec or less (sample gas flow rate 0.5L/
min)
*The time (= 1sec.) required for gas replacement in the internal piping is not
included.
Linearity:
Within ± 2% of full scale
Compositional variations:
0.04%O2 or 1% of full scale, or whichever is larger.
Sample gas temperature:
0 to 40˚C
Pressure loss:
Approx. 1.3kPa {about 130mmH 2O}(at
sample gas flow rate 0.5L/min)
Approx. 2.8kPa {about 280mmH 2O}(at
sample gas flow rate 1L/min)
Reference gas: N2, O2 gas or air
Reference gas pressure:
100kPa (range width: 10%O2 or more)
Specified pressure: 50 to 150kPa (range
width: less than 10%O2)
*Specified pressure is marked at the reference gas inlet.
*Reference gas is supplied at the above
pressure to allow for flow rates of 5 to
20mL/min.
Purging gas (dry air or N2) flow rate:
1L/min
(flowed for purging corrosive ambient
gas)
Gas inlet/outlet dimensions:
Rc1/4 (PT1/4 female screw) or NPT1/4
Zero drift:
FEATURES
1. Because of a pressure detection type, response is quick.
90% response can be reached within 2sec.
2. Measuring range can be set in any range of 0 to 2 ...
100%O2
3. Combustible gases do not affect measurements.
4. Measurements are scarcely affected by coexisting gases
(H2, CO2 etc).
5. Suppression range is possible (for example, 21 to 100%,
100 to 95%O2 etc).
6. Interactive operation is possible by using liquid crystal
display.
7. Parts which are brought in contact with gases are made
of anticorrosive materials such as stainless steel and teflon.
SPECIFICATIONS
Measuring range: 1) When reference gas is N2,
0 to 2 ... 0 to100%O2
(freely settable in 1%O2 steps)
2) When reference gas is air,
21 to 23 ... 21 to 100%O2 or
21 to 19 ... 0%O2
(freely settable in 1%O2 steps)
3) When reference gas is 100%O2,
100 to 98 ... 100 to 0%O2
(freely settable in 1%O2 steps)
Numbers of range:
2 ranges
Measuring system:
Paramagnetic pressure type
Output signal:
4 to 20mA DC
(load 550Ω max.)
0 to 1V DC
Repeatability:
Within ± 0.5% of full scale
(in 10% or higher ranges)
Within ± 1% of full scale
(in ranges below 10%)
EDS3-115c
Date
Apr. 1, 2011
ZAJ
Materials of gas-contacting parts:
Teflon and 304 stainless steel
Temperature characteristic:
1.5% of full scale/10°C
Warmup time: Approx. 2 hours
Interference due to coexisting gas:
(Deviation in O2 % of zero point caused
by flowing interfering gas component at
100%)
Interfering
gas
Display:
Deviation
in O2%
Interfering
gas
Deviation
in O2%
NO
+43
C3H4
– 0.44
NO2
+28
H2S
– 0.39
He
+0.30
HCR
– 0.30
H2
+0.24
CO2
– 0.27
Ne
+0.13
NH3
– 0.26
HF
+0.10
C2H2
– 0.24
CO
+0.01
Ar
– 0.22
n-C7H16
–2.10
SO2
– 0.22
Xe
–0.95
N2O
– 0.20
C3H8
–0.86
CH4
– 0.20
C3H6
–0.55
H2O
– 0.02
C2H6
–0.46
Liquid crystal display,
concentration indication (4 digits),
range indication (4 digits)
message indication (24 characters, 2 lines)
Output hold:
Output hold is possible during calibration.
Moving average time:
0 to 99.9sec
Contact output: 1a contact calibration signal, instrument
failure, contact capacity 250V AC, 2A (resistance load)
Power supply:
85 to 264V AC, 50/60Hz
Power consumption:
Approx. 45VA
Ambient temperature:
–5 to +45°C
Ambient humidity:
Less than 90% RH
Allowable (max.) external vibration:
1.0m/s2{0.1G}(0 to 30Hz)
0.5m/s2{0.05G}(30 to 100Hz)
External dimension (HxWxD):
Rack mount type 220x483x463mm
Flush mount type 220x443x463mm
Desk-top type
233x443x463mm
Mass:
Approx. 16kg
Finish color:
Munsell 5Y 8/1
Installation condition:
• The instrument must be protected from
direct sunlight and heat radiation from
objects at high temperature.
• For installing the instrument outdoors,
it must be protected from the elements
with a suitable casing or cover.
• The instrument must be installed in a
clean atmosphere free from corrosive
or combustible gas.
• The instrument must be free from severe external vibrations. When fast
response time is required, it should be
used in a place free from vibration.
2
Mounting method:
Mounting on 19-inch rack, flush mounting on panel or desk top mounting
Support
90°
Note: Instrument mass of more than 70% should
be supported at the bottom of the case.
* For panel mounting or 19-inch rack mounting, a support should be provided for supporting the rear side of the case.
OPTIONAL SPECIFICATION
Alarm output:
Upper limit alarm:
Contact output; 1c contact
Contact capacity; 250 AC, 2A
(resistive load)
Lower limit alarm:
Contact output; 1c contact
Contact capacity; 250 AC, 2A
(resistive load)
Remote range changeover:
Range can be changed with external signal
Signal input for range changeover; 5V DC
Range identification signal output:
Contact output; 1a contact
Contact capacity; 250 AC, 2A
(resistive load)
Output hold:
Each output can be held by external input signal
Input signal for external hold; 5V DC (held
by 5V input)
Transmission function:
RS-232C interface
Half-duplex bit serial, start-stop
synchronouse, 9600bps
Automatic calibration:
Zero/span calibration is performed automatically at a preset cycle.
Calibration gas is supplied while driving
the external electromagnetic valve.
Calibration gas density setting range:
Zero gas: 0.00 to 99.99%O2
(0.01%O2 step)
Span gas: 0.00 to 99.99%O2
(0.01%O2 step)
Calibration start:
Built-in timer or remote start signal
Output hold during calibration: Possible
Calibration gas flow time:
Up to Max. 60min and 59sec
Calibration cycle:
1 to 168 hours (1 hour step)
Contact output:
Calibration: 1a contact
Contact capacity: 250V AC, 2A
(resistance load)
Calibration error: 1a contact
Contact capacity: 250V AC, 2A
(resistance load)
Remote start:
Remote start input signal: 5V DC
(start at more than
100msec of pulse input)
CODE SYMBOLS
1 2 3 4 5 6 7 8
ZA J
SCOPE OF DELIVERY
9 10 11 12
Main unit:
Description
4 -
Measuring range
2 range selectable
Minimum range 2%O2
Maximum range 100%O2
Range setting before delivery 5/25 O2
range
(Refer to "Measuring range" in SPECIFICATION)
4 Y
Response time
Standard type (2sec/90% of full scale)
(5% or more O2 of full scale)
2
Power supply and pipe connection
dimension
85 to 264V AC 50Hz/Rc1/4
85 to 264V AC 60Hz/Rc1/4
85 to 264V AC 50Hz/NPT1/4
85 to 264V AC 60Hz/NPT1/4
5
6
7
8
Use
For general service
0
Note
Display
Japanese
English
N
E
(1) When using this analyzer, be sure to provide a buffer
tank in the exhaust path immediately after the analyzer.
This is required for preventing output fluctuation due to
disturbances such as large noise and strong wind.
(2) In case of air-suppletion range, span gas concentration
should be ordered by specifying 80 to 100% of the full
scale. At this time, clearly describe "manufacture according to weighing method and accuracy within O2 concentration corresponding to ± 1% of full scale."
Otherwise, concentration error will increase.
[Example] In case of 21 to 19%O2 range:
Span gas concentration
19.0 to 19.4%O2/N2, manufacture according to weighing method, accuracy within
± 0.02%O2.
(3) In case of oxygen-suppletion range, use O2 gas of purity
99.99% or more for zero gas in ranges of 10% or less O2
full scale, and that of purity 99.9% or more in other ranges.
(4) Use a copper pipe (6/4 copper pipe) for the reference
line. It should be as short as possible from the gas cylinder. If it is long, it takes time until it is stabilized after
power ON. Do not use a plastic pipe, as it causes errors
in reading due to permeantion of oxygen.
Option
Without
Automatic calibration
Alarm output, remote range, range
identification
Transmission function (RS-232C)
A+B
A+C
B+C
A+B+C
Y
A
B
C
D
E
F
G
Construction
Desk-top type
19 inches rack mount type
Panel flush mount type
A
B
C
Analyzer unit x 1, 2 of fuses, one of instruction manual, one of accessory kit
(one of restrictor, six of packings, two of
filters, two of spanners)
Items to be prepared separately:
Standard gas for calibration
Code symbol ZBM SY04-01
Reference gas
• Measuring range 0 to 2 ... 100%O2
N2 : Code symbol ZBM NY04-01
• Measuring range 21 to 23 ... 100%O2
21 to 19 ... 0%O2
Air : Code symbol ZBM RY04-01
or instrumentation air
• Measuring range 100 to 98 ... 0%O2
O2 : Code symbol ZBM SY04-01
Buffer tank
ZBH410 3
CONSTITUTION
Sampling system diagram (Example)
Flow checker
Gas sampler
Buffer tank
Membrane
filter
Atmosphere
Gas inlet tube
Pressure
alarm unit
Mist filter
ZAJ
Analyzer-unit
Electromagnetic valve
Pump
Safety drain
trap
Electromagnetic
valve
Peltier gas
cooler
Span
gas
cylinder
ZBM
Regulation valve
Zero
gas
cylinder
ZBM
Reference
gas
cylinder
ZBM
Drain
Note)
Polyethylene tude
Copper pipe Ø6/Ø4
Exhaust
3
ZAJ
OUTLINE DIAGRAM
(Unit:mm)
483
465
35
400
28
443
ZAJ
220
146
CO2
Supporter
Power switch
Operation panel
(Rack mounting plate)
• Supporter more than 70% of the instrument mass
at the bottom of the case.
< Front view >
< Side view >
Gas inlet, outlet Rc 1/4 or NPT 1/4
Sample gas inlet
Purge gas inlet
Sample gas
Reference gas inlet
outlet
435
R3.5
Panel cutout (for flush mounting)
212
Terminal block 1
213 +20
7
External connection
terminal
Terminal block 2
436 +20
RS232C connector
FG
Power supply
terminal
< Rear view >
EXTERNAL CONNECTION DIAGRAM
Terminal block 1
Output signal
4 to 20mA DC
Oxygen concentration value
Output signal
0 to 1V DC
Oxygen concentration value
Upper limit alarm
contact output
(option)
Lower limit alarm
contact output
(option)
1
11
2
12
3
13
4
14
5
15
6
16
7
17
8
18
9
19
10 20
POWER SUPPLY TERMINAL
Terminal block 2
Remote range
input
(option)
1
11
2
12
External hold
input
(option)
3
13
4
14
Contact
output for
zero
calibration
gas
5
15
6
16
7
17
Contact
output for
span
calibration
gas
8
18
9
19
Range
identification
contact output
(option)
Under calibration
contact output
Instrument
abnormal
contact output
Remote start
input
Power supply
to 264V AC
( 85
(
50/60Hz
Automatic
calibration
error
contact output
10 20
Caution on Safety
*Before using this product, be sure to read its instruction manual in advance.
International Sales Div
Sales Group
Gate City Ohsaki, East Tower, 11-2, Osaki 1-chome,
Shinagawa-ku, Tokyo 141-0032, Japan
http://www.fujielectric.com
Phone: 81-3-5435-7280, 7281 Fax: 81-3-5435-7425
http://www.fjielectric.com/products/instruments/
Information in this catalog is subject to change without notice.
Printed in Japan