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一、   介電常數(shù)測(cè)試儀概述
介質(zhì)損耗和介電常數(shù)是各種電瓷、裝置瓷、電容器等陶瓷，還有復(fù)合材料等的一項(xiàng)重要的物理性質(zhì)，通過測(cè)定介質(zhì)損耗角正切tanδ及介電常數(shù)（ε），可進(jìn)一步了解影響介質(zhì)損耗和介電常數(shù)的各種因素，為提高材料的性能提供依據(jù)；儀器的基本原理是采用高頻諧振法，并提供了，通用、多用途、多量程的阻抗測(cè)試。它以單片計(jì)算機(jī)作為儀器的控制，測(cè)量核心采用了頻率數(shù)字鎖定，標(biāo)準(zhǔn)頻率測(cè)試點(diǎn)自動(dòng)設(shè)定，諧振點(diǎn)自動(dòng)搜索，Q值量程自動(dòng)轉(zhuǎn)換，數(shù)值顯示等新技術(shù)，改進(jìn)了調(diào)諧回路，使得調(diào)諧測(cè)試回路的殘余電感減至zui低，并保留了原Q表中自動(dòng)穩(wěn)幅等技術(shù)，使得新儀器在使用時(shí)更為方便，測(cè)量值更為精確。儀器能在較高的測(cè)試頻率條件下，測(cè)量高頻電感或諧振回路的Q值，電感器的電感量和分布電容量，電容器的電容量和損耗角正切值，電工材料的高頻介質(zhì)損耗，高頻回路有效并聯(lián)及串聯(lián)電阻，傳輸線的特性阻抗等。
介電常數(shù)介質(zhì)損耗試驗(yàn)儀用于科研機(jī)關(guān)、學(xué)校、工廠等單位對(duì)無機(jī)非金屬新材料性能的應(yīng)用研究。
二、介電常數(shù)試驗(yàn)儀的技術(shù)指標(biāo)
  1．Q值測(cè)量
   a．Q值測(cè)量范圍：2～1023。
   b．Q值量程分檔：30、100、300、1000、自動(dòng)換檔或手動(dòng)換檔。
 c．標(biāo)稱誤差
項(xiàng)    目
GDAT-A
頻率范圍
20kHz～10MHz；
固有誤差
≤5％±滿度值的2％；
工作誤差
≤7％±滿度值的2％；
頻率范圍
10MHz～60MHz；
固有誤差
≤6％±滿度值的2％；
工作誤差
≤8％±滿度值的2％。
   2．電感測(cè)量范圍：14.5nH~8.14H
 
 
 
 
3．介電常數(shù)試驗(yàn)儀電容測(cè)量：1~ 460
項(xiàng)    目
GDAT-A
直接測(cè)量范圍
1～460pF
主電容調(diào)節(jié)范圍
準(zhǔn)確度
30～500pF
150pF以下±1.5pF；
150pF以上±1％
   注：大于直接測(cè)量范圍的電容測(cè)量見使用規(guī)則
   4．介電常數(shù)介質(zhì)損耗試驗(yàn)儀信號(hào)源頻率覆蓋范圍
項(xiàng)     目
GDAT-A
頻率范圍
10kHz～50MHz
頻率分段
（虛擬）
10～99.9999kHz
100～999.999kHz
1～9.99999MHz
10～60MHz    
頻率指示誤差
3×10-5±1個(gè)字
   5．Q合格指示預(yù)置功能
      預(yù)置范圍：5～1000。
   6．Q表正常工作條件
   a. 環(huán)境溫度：0℃～+40℃；                    
b．相對(duì)濕度：<80％； 
c．電源：220V±22V，50Hz±2.5Hz。
   7．其他
   a．消耗功率：約25W； 
b．凈重：約7kg； 
c. 外型尺寸：（l×b×h）mm：380×132×280。
   8．產(chǎn)品配置：
a.測(cè)試主機(jī)一臺(tái)；
b.電感9只；
c.夾具一套  
電感：
 
線圈號(hào)    測(cè)試頻率    Q值    分布電容p       電感值 
  9         100KHz      98       9.4           25mH
  8         400KHz     138       11.4        4.87mH
  7         400KHz    202       16           0.99mH
  6           1MHz     196       13          252μH
  5           2MHz     198       8.7        49.8μH
  4         4.5MHz    231       7             10μH
  3          12MHz      193     6.9         2.49μH
  2          12MHz      229     6.4        0.508μH
            
  1   25MHz，50MHz   233，211    0.9       0.125μHGDAT-A
Dielectric constant dielectric loss tester details:
One, the dielectric constant dielectric loss tester overview
Dielectric loss and dielectric constant are all kinds of porcelain, porcelain, ceramic capacitor device, and composite materials is an important physical properties, by measuring the dielectric loss tangent of dielectric constant （ Tan δ andε）, to further understand the effects of dielectric loss and dielectric constant of the various factors, in order to improve the material the property basis; instrument basic principle is the use of high frequency resonance method, and provides, universal, multi-purpose, multiple range impedance test. It uses single-chip computer as the control core of measuring instrument, using the frequency locking, frequency standard test point automatic setting, resonant point automatic search, Q value range automatic conversion, numerical display and other new technology, improved the tuning circuit, the tuning circuit for testing the residual inductance is reduced to the minimum, and retains the original Q table in the automatic amplitude stabilizer technology, makes the new instrument in the use of more convenient, measurement is more accurate. Instrument in high frequency test conditions, measurement of high frequency inductive or resonant loop of the Q value, the inductance of the inductor is the amount and distribution of capacitance, capacitance and loss angle tangent value of electrical materials, dielectric loss in high frequency, high frequency circuit in parallel and series resistance, the characteristic impedance of the transmission line and so on.
Dielectric constant dielectric loss tester used in scientific research institutions, schools, factories and other units to inorganic metalloid new material property application research.
In two, the dielectric constant dielectric loss tester technical index
1.Q measurement
A.Q measurement range: 2～ 1023.
The b.Q value range profile: 30, 100, 300, 1000, automatic or manual shift.
Nominal error C.
Item
GDAT-A
Frequency range
20kHz - 10MHz;
Intrinsic error
= 5%±full scale value 2%;
Operating error
= 7%±full scale value 2%;
Frequency range
10MHz - 60MHz;
Intrinsic error
= 6%±full scale value 2%;
Operating error
= 8%±full scale value 2%.
The 2 inductance measurement range: 14.5nH~8.14H
A 3 dielectric constant dielectric loss tester capacitance measurements: 1~ 460
Item
GDAT-A
Measuring range
1 - 460pF
The main capacitor adjustable range
Degree of accuracy
30 - 500pF
The following 150pF± 1.5pF;
150pF or + 1%
Note: larger than direct measurement range of the capacitance measurement see using rules
A 4 dielectric constant dielectric loss tester signal source frequency coverage
Item
GDAT-A
Frequency range
10kHz - 50MHz
Frequency segmentation
（ virtual ）
10 - 99.9999kHz
100 - 999.999kHz
1 - 9.99999MHz
10 - 60MHz
Frequency indication error
3 x 10-5 ±1 words
5.Q qualified instructions preset function
Preset range: 5～ 1000.
Table 6.Q the normal working conditions
A. environment temperature: 0 ℃~ +40 ℃;
Relative humidity: <80% b.;
Power supply: C. 220V± 22V, 50Hz ±2.5Hz.
7 other
A. power consumption: about 25W;
Net weight: B. about 7kg;
Size: C. （ L× B× h ）× 132 mm:380× 280.
8 product configuration:
The A. test host a;
B. inductance 9;
C. jig set
Inductance:
Coil test frequency distributions of Q values of P inductance capacitance
9 100KHz 989.4 25mH
8 400KHz 13811.4 4.87mH
7 400KHz 20216 0.99mH
6 1MHz 19613252 μ H
5 1988.7 49.8 μ H 2MHz
4 4.5MHz 231710 μ H
3 1936.9 2.49 μ H 12MHz
2 2296.4 0.508 μ H 12MHz
1 25MHz, 0.125μ H 50MHz 2332110.9