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測試原理
根據(jù)斯托克斯定理，粉塵顆粒在沉降過程中，發(fā)生顆粒分級，因而靜止的沉降液的粘滯性對沉降
顆粒起著摩擦阻力作用，按公式計算： 
r = 9η/ [2 g (γk –γt )] ? (H / t)
式中： 
r = 顆粒半徑 cm 
η= 沉降液粘度 泊，即 克/厘米?秒 
γk= 顆粒比重 克/厘米³
γt = 沉降液比重 克/厘米³
H = 沉降高度(沉降液面到稱盤底面的距離) 厘米 
t = 沉降時間 秒 
g = 重力加速度 980厘米/秒2
當(dāng)測出顆粒沉降至一定高度H 所需之時間t 后，就能算出沉降速度V、 顆粒半徑r。所謂沉降分析法就應(yīng)用此理論來求得顆粒分布情況。

經(jīng)典的測試原理、清晰明了的測試過程、穩(wěn)定可靠的測試數(shù)據(jù)、快速方便的數(shù)據(jù)處理、簡單易懂的操作、低廉的價格，尤其適合工礦企業(yè)實驗室做質(zhì)量檢測以及大專院校的師生開展相關(guān)科研

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Introduction

① force value sensor for high-performance electromagnetic force balance principle to optimize the design of 1mg accuracy increased to 0.1mg greatly enhanced to improve the sensitivity, accuracy and repeatability of the instrument;
② The STN wide viewing angle, backlit LCD display;
The ③ optimize the data processing software for a number of long measurement sample performance of the settlement and small particles. The calculation is smoother, more accurate results;
④ the use of advanced data structures, re-preparation of the original database program, the more stable and reliable performance.

The particle detector consists of high precision electronic settlement balance, computer and granular data processing software. Settlement solution in the measured particle deposition to the balance pan, the LCD screen that displays the value of quality, at the same time the quality of the signal transmitted to the computer, the end of the real-time acquisition-grained data-processing software quality signal and displayed on a computer screen, the settlement after the curve stored in order at any time call, and then proceed to the calculation of particle size, the calculation results table and graphical print out.

The instrument is widely used in the determination: pigments, abrasive synthetic resins, cosmetics, pharmaceuticals, glass, powder metallurgy, cement, plastics, refractories, paint, oil, coal and other industrial dust particle size and distribution, is engaged in the research and testing of particle size commonly used instrument for the work of scientific and technical personnel.

Main technical parameters:



Model                                        ETT-TZC-V                   ETT-TZC-VI

Balance the maximum load             100g                        100g
Balance accuracy                            1mg                          0.1mg
Particle determination range         1 ~ 600μm             1 ~ 600μm
The host function is cleared, peeled, self-calibration, alarm
Way wide viewing angle, backlight LCD.
Data processing subsidence curves of the collection, storage, call; particle size, median diameter, with an average particle size, specific surface area measurements; average
Error calculation; particle size distribution analysis; calculations, charts, print




 Standard configuration:
Host (a self-calibration weights, cable two) 1
Lenovo desktop computers (including color inkjet printer)
A settlement plate
Ordinary sedimentation tube 2
Manual 1
Certificate copy