FUJI EDS3-125B

PARAMAGNETIC OXYGEN ANALYZER
DATA SHEET
ZKG
This product is a dumbbell type paramagnetic oxygen
analyzer. Because this analyzer is based on that the magnetic susceptibility of oxygen gas is larger than coexisting
gases, stable measurement is ensured unaffected by coexisting gases. The detector does not have a heating part
such as heater. Therefore, this analyzer is suited for measuring the oxygen concentration in flammable gas. Further, running cost can be saved since reference gas is not
required.
FEATURES
1. Since reference gas is unnecessary due to use of a
dumbbell type paramagnetic system, this analyzer will
not entail an additional running cost.
2. The principle of measurement is dependent on the
strong magnetic property of oxygen molecules. Therefore, measurement is almost unaffected by other molecules weaker in magnetic property than oxygen.
3. Suited for measuring oxygen in flammable gas.
4. Small-sized and easy to handle.
5. Usable with a wide range of power supplies.
6. Output is linear.
SPECIFICATIONS
Measuring range:
0 to 10, 21, 25, 50, 100% O2
Number of ranges:
1 or 2 ranges (selectable by code symbol)
Measuring system:
Paramagnetic (dumbbell type)
Output signal:
One of the following signals (selectable
by code symbol)
4 to 20 mA DC (load resistance 550 Ω
max.)
0 to 1 V DC (permissible load resistance
100 kΩ max.)
0 to 10 mV DC (permissible load resistance 100 kΩ max.)
Repeatability:
Within ± 0.5% of full scale
Linearity:
Within ± 1.0% of full scale
Zero drift:
Within ± 2.0% of full scale/week
Span drift:
Within ± 2.0% of full scale/week
Response time: Within 15 sec (90% response)
Flow rate of sample gas:
0.5 L/min ± 0.2 L/min
Pressure loss:
Approx. 0.3 kPa (at sample gas flow rate
0.5 L/min)
Flow rate of purge gas (option):
1 L/min, N2 or air (flowed for purging corrosive ambient gas)
Power supply:
100 to 240 V AC, 50/60 Hz
Power consumption:
Approx. 35 VA
Ambient temperature:
0 to 45˚C
Ambient humidity:
Less than 90% RH
Warm-up time: Approx. 30 minutes
Materials of gas-contacting parts:
SUS304, SUS316, fluororubber, borosilicate
glass, Electroless Nickel, platinum, platinum/
iridium alloy, PP, Toaron, PVDF (polyvinylidene
fluoride), PPS resin
Interference due to coexisting gas:
Interfering Interfering gas
gas
concentration
Interfering
concentration
NO
2000ppm
0.15vol% O2 max.
CO
100vol%
0.1vol%O2 max.
CO2
100vol%
– 0.35vol%O2 max.
CH4
100vol%
– 0.25vol%O2 max.
Enclosure:
Steel casing, for indoor application, flush
mounting on panel
Dimensions (H x W x D):
240 x 192 x 234 mm
Weight:
Approx. 5 kg
Finish color:
Munsell 10Y7.5/0.5 semi-gloss
EDS3-125b
Date
Apr. 1, 2011
ZKG
Measuring gas conditions:
Temperature: 0 to 50˚C
Humidity:
Dew point at least 10˚C lower
than ambient temperature
Dust:
Max. 100 µg/Nm3 in particles
of max. 0.3 µm each
Mist:
Unallowable
Pressure:
10 kPa or less
Installation conditions:
• 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 rain and wind with
a suitable casing or cover.
• The instrument must be installed in a clean
atmosphere free from corrosive or flammable gas.
• The instrument must be free from severe
external vibrations.
Mounting:
Vertical mounting on panel
Panel cutout dimensions (mm)
CODE SYMBOLS
1 2 3 4 5 6 7 8
ZKG3 Y
9 10
2 -
Description
Use (4th digit)
With indication
3
Measuring range (6th digit)
0 to 10 vol%
0 to 25 vol%
0 to 50 vol%
0 to 100 vol%
0 to 21 vol%
1
2
3
4
5
Purge inlet (7th digit)
Without purge gas inlet
With purge gas inlet
0
1
2nd range (9th digit)
Without
0 to 25 vol%
0 to 50 vol%
0 to 100 vol%
0 to 21 vol%
Y
2
3
4
5
A
B
C
Output signal (10th digit)
DC 4 to 20mA
DC 0 to 1V
DC 0 to 10mV
+2
0
232
+2
0
184
90˚
PRINCIPLE OF MEASUREMENT
Hanging wire
Magnetic pole
Double sphere
(dumbbell)
Magnetic pole
Feedback coil
Reflecting mirror
Infrared ray source
Light receiving element
2
In the cell, two glass spheres filled with nitrogen gas are suspended with strong metal. At first,
the spheres are kept in balance in an inhomogeneous magnetic field. When oxygen molecules
having a large magnetic susceptibility flow there,
the molecules are pulled toward the stronger magnetic field zone and the spheres are moved away
from the zone. The resulting deviation of the
spheres is detected with the light source, reflecting mirror and light receiving element, and a current is flowed through the feedback loop to control so that the spheres can return to the initial
balanced state. The current flowing through the
feedback loop is proportional to oxygen concentration. Thus, oxygen concentration is converted
into an electric signal.
CONFIGURATION
Sampling System Diagram (example: Oxygen measurement in boiler exhaust gas)
Gas extractor
Gas inlet tube
Flowmeter
0.5L/min
Mist filter
Aspirator
Selector
valve
Membrane filter
of 0.3 µm max.
ZKG
oxygen analyzer
Drain
separator
Exhaust release
into atmosphere
Electronic
gas cooler
Pressure regulator
Safety drain
trap
Exhaust + drain
Regulation
valve
N2
O2
Zero gas
Span gas
Purge gas
(when required)
1L/min
Air or N2
Standard gas for calibration
SCOPE OF DELIVERY
CAUTIONS
Analyzer main unit x 1
Panel mounting bracket x 2
Fuse 250 V AC/0.5 A delay type x 2 (1 accessory and 1 built in)
Instruction manual x 1
(1) Use the analyzer within the specified flow rate. If it is
used beyond the specified flow rate for enhancing response, the sensor section may be damaged to cause
an instrument trouble.
(2) Before the analyzer, be sure to connect a flowmeter
and filter (0.3 µm or finer mesh).
(3) Use a shielded wire for signal line connection.
(4) Analyzer exhaust should be released into the atmospheric air.
3
ZKG
OUTLINE DIAGRAM (Unit : mm)
Side View
Front View
t
140
Panel
1.6<t<10
OXYGEN ANALYZER
O2
240
230
248
268
vol%
SPAN
ZERO
L
H
RANGE
192
169
189
Terminal block
45
* Change switch is not attached in the case
of a single range.
Panel mounting bracket
3-Rc 1/4
Purge inlet available
at option
Rear View
PANEL CUTOUT DIMENSION
184
+2
0
GAS
OUTLET
SAMPLE
INLET
POWER SOURCE
L
N PE
1
2
3
240
232
230
+2
0
PURGE
INLET
A.OUT
+
4
5
CONNECTION DIAGRAM
(M4 screw)
1
2
3
4
5
6
7
8
9
182
192
10
+
−
Power supply G Output signal
100 to 240 V AC,
0 to 1 V DC,
50/60 Hz
4 to 20 mA DC or
0 to 10 mV DC
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