this product is a dumbbell type paramagnetic oxygen analyzer. because this analyzer is based on that the mag- netic susceptibility of oxygen gas is larger than coexisting gases, stable measurement is ensured unaffected by co- existing gases. the detector does not have a heating part such as heater. therefore, this analyzer is suited for mea- suring the oxygen concentration in flammable gas. fur- ther, running cost can be saved since reference gas is not required. 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. there- fore, measurement is almost unaffected by other mol- ecules 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. measuring range: 0 to 10, 21, 25, 50, 100% o 2 number of ranges: 1 or 2 ranges (selectable by code sym- bol) measuring system: paramagnetic (dumbbell type) output signal: one of the following signals (selectable by code symbol) 4 to 20 ma dc (load resistance 550 ? max.) 0 to 1 v dc (permissible load resistance 100 k ? max.) 0 to 10 mv dc (permissible load resis- tance 100 k ? 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) features specifications data sheet zkg paramagnetic oxygen analyzer flow rate of purge gas (option): 1 l/min, n 2 or air (flowed for purging corro- sive 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 gas no co co 2 ch 4 interfering gas concentration 2000ppm 100vol% 100vol% 100vol% interfering concentration 0.15vol% o 2 max. 0.1vol%o 2 max. ?0.35vol%o 2 max. ?0.25vol%o 2 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 date EDS3-125B apr. 1, 2011
2 zkg measuring gas conditions: temperature: 0 to 50?c humidity: dew point at least 10?c lower than ambient temperature dust: max. 100 g/nm 3 in particles of max. 0.3 m each mist: unallowable pressure: 10 kpa or less installation conditions: ?the instrument must be protected from direct sunlight and heat radiation from ob- jects 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 flam- mable gas. ?the instrument must be free from severe external vibrations. mounting: vertical mounting on panel 90? 184 panel cutout dimensions (mm) +2 0 232 +2 0 description 2 y zkg3 - 12345678 910 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% 2nd range (9th digit) without 0 to 25 vol% 0 to 50 vol% 0 to 100 vol% 0 to 21 vol% output signal (10th digit) dc 4 to 20ma dc 0 to 1v dc 0 to 10mv 1 2 3 4 5 y 2 3 4 5 purge inlet (7th digit) without purge gas inlet with purge gas inlet 0 1 a b c code symbols feedback coil hanging wire magnetic pole magnetic pole reflecting mirror infrared ray source light receiving element double sphere (dumbbell) principle of measurement in the cell, two glass spheres filled with nitro- gen gas are suspended with strong metal. at first, the spheres are kept in balance in an inhomoge- neous magnetic field. when oxygen molecules having a large magnetic susceptibility flow there, the molecules are pulled toward the stronger mag- netic field zone and the spheres are moved away from the zone. the resulting deviation of the spheres is detected with the light source, reflect- ing mirror and light receiving element, and a cur- rent is flowed through the feedback loop to con- trol so that the spheres can return to the initial balanced state. the current flowing through the feedback loop is proportional to oxygen concen- tration. thus, oxygen concentration is converted into an electric signal.
3 configuration sampling system diagram (example: oxygen measurement in boiler exhaust gas) membrane filter of 0.3 m max. purge gas (when required) 1l/min air or n 2 zkg oxygen analyzer electronic gas cooler o 2 n 2 gas extractor mist filter aspirator gas inlet tube selector valve regulation valve safety drain trap exhaust + drain drain separator flowmeter 0.5l/min pressure regulator standard gas for calibration zero gas span gas exhaust release into atmosphere 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 scope of delivery cautions (1) use the analyzer within the specified flow rate. if it is used beyond the specified flow rate for enhancing re- sponse, 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 m or finer mesh). (3) use a shielded wire for signal line connection. (4) analyzer exhaust should be released into the atmo- spheric air.
zkg 1 0 8 & 3 4 0 6 3 $ & - / 1 & " 0 6 5 1 6 3 ( & * / - & 5 4 " . 1 - & * / - & 5 ( " 4 0 6 5 - & 5 ) - 4 1 " / ; & 3 0 3 " / ( & w p m 0 0 9 : ( & / " / " - : ; & 3 rear view front view side view panel 1.6 outline diagram (unit : mm) panel cutout dimension connection diagram printed in japan 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.
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