I . Instrument Components
1. Micro-computer functional nutrient tester
It’s a main component , including host instrument、filter、color plate , and so on .
2. Glassware :
Volumetric flasks, scale straw, triangle flasks, funnel, distillation tube, absorption bottle, and so on .
3. Tray Balance :
It is a weighing instrument , inductance is 0.1g . Better if you can use balance with inductance for 0.01g , it can improve testing accuracy .
4. Pharmacy and powder :
More than 20 kinds of liquid pharmacy and powder , it can analyze more than 100 soil samples . all pharmacy is enough and available except for distilled water and ethanol when testing samples .
5. Others : Calculator, Filter paper, washing ear ball, aluminum box , it can finish test without any laboratory equipments .
II . Performance Index :
1. Testing items :
1.) Hydrolytic nitrogen、ammonium nitrogen、nitrate nitrogen、available phosphorus、available potassium、organic matter、PH in the soil .
2.) N, P, K fertilizer and urea、ammonium nitrogen、nitrate nitrogen、available phosphorus、available potassium in complex ( mixed ) fertilizer .
3.) Nitrate nitrogen, phosphorus and potassium in plants .
4.) Others : Middle、trace elements Ca、Mg、Cu、Fe、Mn、B、Cl、S and so on .
III . Technical Index :
1. Power : 220V±22V for AC ; 12V for Battery ( DC ) .
2. Measuring range and Resolution (0.001 – 9999 ) :
9999μg /mL, resolution 1μg/mL (1μg/mL≈1ppm≈Lmg/kg) ;
999.9μg/mL, resolution 0.Lμg/mL (1μg/mL≈1ppm≈Lmg/kg) ;
99.99μg/mL, resolution 0.01μg/mL (1μg/mL≈1ppm≈Lmg/kg) ;
9.999μg/mL, resolution 0.001μg/mL (1μg/mL≈1ppm≈Lmg/kg) .
3. Stability : Displayed drift number is less than 0.5 % (A) , (transmittance measurement) within 3 minutes after powering on for 20 minutes .
4. Repeatability error : Error is less than 0.4% (A) ( testing in potassium dichromate standard solution, 2000μg /mL ) . ( transmittance testing ) .
5. Linear error :
≤ 3% ，（30，90,150,180μg/mL Potassium dichromate solution）
6. Power consumption : ≤ 5W (DC).
IV . Size and Weight :
Box for pharmacy and powder : 410mm x 320mm x 180mm ; Weight : 4.7 kgs .
Box for Instrument : 410mm x 320mm x 120mm ; weight : 3.1 kgs .
VI . Testing speed :
It’s about 1 hour when testing fertilizer, hydrolyzable nitrogen, ammonium nitrogen, phosphorus and potassium ( it include time for preparing soil sample and pharmacy ) .
