一、   介电常数测试仪概述
介质损耗和介电常数是各种电瓷、装置瓷、电容器等陶瓷，还有复合材料等的一项重要的物理性质，通过测定介质损耗角正切tanδ及介电常数（ε），可进一步了解影响介质损耗和介电常数的各种因素，为提高材料的性能提供依据；仪器的基本原理是采用高频谐振法，并提供了，通用、多用途、多量程的阻抗测试。它以单片计算机作为仪器的控制，测量核心采用了频率数字锁定，标准频率测试点自动设定，谐振点自动搜索，Q值量程自动转换，数值显示等新技术，改进了调谐回路，使得调谐测试回路的残余电感减至zui低，并保留了原Q表中自动稳幅等技术，使得新仪器在使用时更为方便，测量值更为精确。仪器能在较高的测试频率条件下，测量高频电感或谐振回路的Q值，电感器的电感量和分布电容量，电容器的电容量和损耗角正切值，电工材料的高频介质损耗，高频回路有效并联及串联电阻，传输线的特性阻抗等。
介电常数介质损耗试验仪用于科研机关、学校、工厂等单位对无机非金属新材料性能的应用研究。
二、介电常数试验仪的技术指标
  1．Q值测量
   a．Q值测量范围：2～1023。
   b．Q值量程分档：30、100、300、1000、自动换档或手动换档。
 c．标称误差
项    目
GDAT-A
频率范围
20kHz～10MHz；
固有误差
≤5％±满度值的2％；
工作误差
≤7％±满度值的2％；
频率范围
10MHz～60MHz；
固有误差
≤6％±满度值的2％；
工作误差
≤8％±满度值的2％。
   2．电感测量范围：14.5nH~8.14H
 
 
 
 
3．介电常数试验仪电容测量：1~ 460
项    目
GDAT-A
直接测量范围
1～460pF
主电容调节范围
准确度
30～500pF
150pF以下±1.5pF；
150pF以上±1％
   注：大于直接测量范围的电容测量见使用规则
   4．介电常数介质损耗试验仪信号源频率覆盖范围
项     目
GDAT-A
频率范围
10kHz～50MHz
频率分段
（虚拟）
10～99.9999kHz
100～999.999kHz
1～9.99999MHz
10～60MHz    
频率指示误差
3×10-5±1个字
   5．Q合格指示预置功能
      预置范围：5～1000。
   6．Q表正常工作条件
   a. 环境温度：0℃～+40℃；                    
b．相对湿度：<80％； 
c．电源：220V±22V，50Hz±2.5Hz。
   7．其他
   a．消耗功率：约25W； 
b．净重：约7kg； 
c. 外型尺寸：（l×b×h）mm：380×132×280。
   8．产品配置：
a.测试主机一台；
b.电感9只；
c.夹具一套  
电感：
 
线圈号    测试频率    Q值    分布电容p       电感值 
  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