Audo Look6.0 download870 model difference pressing type reads BOD to determine continuously appearance is a kind of when use empty atmospheric pressure to differ a law to undertake biochemical oxygen demand determines new-style instrument, its operation is simple, what can offer as attenuant as chemistry Fakebi is accurate measure an outcome, reading is intuitionistic, use and safeguard convenient. Wide application is monitored at environmental protection, the branch such as scientific research of sanitation of petro-chemical, medical treatment, education is right of water quality monitor, it is the powerful tool of extensive analysis worker. The sample that will choose good span beforehand and measures good volume by span limits falls into fostering bottle, successive on lead plane beater agitate. Put lead plane and education bottle into developing case. Adjust the temperature inside education box is ℃ of 20 ℃ ±1, after waiting for sample constant temperature, undertake 5 days fostering. The sample in fostering bottle made sure below the circumstance of successive agitate enough dissolved oxygen is offerred microbial undertake biochemistry reacts. The organic matter in sample passes biology oxidation, change becomes the oxide of nitrogen, carbon and sulfur. In this one process, the only gas carbon dioxide that spills over from inside sample is oxidized by hydrogen sodium (or hydrogenous oxidation Potassium) absorb. Right now, the air in fostering bottle presses force decrement, be equivalent to the dissolved oxygen content that microbial place uses up, namely sample BOD5Degree of reductive of pressure of the air in value and bottle becomes direct ratio, so BOD5the value can be pressed by air power decreases a value to determine, the amount that increase or reduces a sample thief can increase or reduce pressure to reduce a cost. Such handlers can accurate the BOD that measures very wide range5Value. The change of pressure of the air in fostering bottle is to pass manometric in the change of mercuric column height will undertake detecting, can numerate namely through simple calculation the BOD of sample5Value. Ambient conditions and main technique index 1, environmental temperature: 40 ℃ of 0 ℃ ～ 2, determine method: Difference controls a standard 3, measure range: 0mg/L ～ 1000mg/L(BOD5The need when the value measures range more than is attenuant) 4, batch processing quantity: Every time 8 sample 5, accuracy: Accord with GB “GB7488-87” standard to set (dextrose glutamic acid mark fluid BOD5The value is inside limits of 180mg/L ～ 230mg/L) 6, show: Can numerate continuously from manometric scale feet sample BOD5Value (Mg/L) 7, foster temperature: ℃ of 20 ℃ ±1 8, power source: Communicate dimension of 36V 9, lead plane: Weight of 400mm×270mm×350mm 10, lead plane: 5kg 11, power comsumption: Instrument 18W -- news source: Ginger lasher city is galactic instrument factory
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