Shanghai Huabang Industrial Business Network - Q table

[Q Table]Q Dielectric loss testing device (matching with Q table)

2026-4-22 15:19:57

One Overview
The S94 dielectric loss testing device box AS2851 Q meter (or other similar Q meters) is used to test the high-frequency dielectric loss tangent and dielectric constant of insulation materials.

II Working characteristics of the S94 dielectric loss testing device (Q meter matching)
1. Flat capacitor: Pole size: �� 25.4mm, adjustable range and resolution of pole spacing: �� 10mm ± 0.01mm,
2. Cylindrical capacitor: Linear capacitance: 0.33pF/mm ± 0.05 pF, adjustable length range and resolution: �� 0-20mm ± 0.01mm
3. Fixture plug spacing: �� 4 × 10-4

III Working principle of S94 dielectric loss testing device (Q meter matching)
This testing device consists of two micro capacitors. The flat capacitor is generally used to hold the tested sample, while the cylindrical capacitor is a linear variable capacitor with a resolution of up to 0.0033pF. It is equipped with a Q-meter as an indicator instrument. The loss tangent value of the insulation material is calculated by the change in Q value of the tested sample when it is placed in the flat capacitor or not, and is converted from the change in the scale reading value of the cylindrical capacitor. At the same time, the dielectric constant is calculated by converting the scale reading of the flat capacitor.

4 Usage
1. Preparation of the tested sample
The tested sample is required to be circular with a diameter of 25.4-27mm, which is an effective way to reduce errors caused by sample edge leakage and edge electric field. The sample thickness can be between 1-5mm. If it is too thin or too thick, the testing accuracy will decrease. The sample should be as straight as possible.
Here is a recommended method to improve testing accuracy: prepare two circular tin films with a thickness of 0.05mm, with a diameter consistent with the electrode plates of the flat capacitor. Apply a thin layer of Vaseline evenly on both sides of the tin film to provide adhesion and eliminate residual air between the contact surfaces. Then, stick the tin film onto the two electrode plates of the flat capacitor, preferably in a mirror like shape, and place the test sample on top.
2. Test sequence
First, it is necessary to have a detailed understanding of the usage of the Q-meter, and avoid the influence of human body induction during operation.
a. Set the main tuning capacitor of the Q meter to the minimum capacitance and the fine tuning capacitor to -5pF.
b. Insert this testing device into the "capacitor" terminals of the Q-meter testing circuit.
c. Equipped with high-Q inductance coils that are compatible with the testing frequency (LKI-1 inductance group used in conjunction with AS2851 Q meter can meet the requirements).
d. Adjust the micrometer rod of the flat capacitor until the two poles are connected, and read the scale value as D.
e. Release the bipolar plate again, insert the tested sample between the bipolar plates, adjust the flat capacitor until the bipolar plates clamp the sample (note to use a micrometer to avoid clamping too tightly or too loosely). At this point, a new scale value can be read, denoted as D1, and the sample thickness D2=D1- D0.
f. Place the cylindrical capacitor at a distance of 5mm.
g. Change the frequency of the Q meter to resonate and read the Q value (to facilitate future readings, adjust the Q meter positioning potentiometer to make the Q value an integer).
h. Adjust the cylinder capacitor clockwise first, then counterclockwise, and read the two scale values on the micrometer when the Q meter indicates that the Q value is half of the original value. Take the difference between these two values and record it as M1.
i. Adjust the cylinder capacitor again to make the Q meter resonate again.
j. Take out the sample from the flat capacitor, and at this point, the Q meter is out of tune again. Adjust the level
Plate capacitor, resonate again, read the reading value D 3 on the micrometer rod, and the change value is
D 4 = D 3 �� D 0 ��
k. Like the h operation, the difference between two new values is denoted as M2.
3. Calculate the test results
Dielectric constant of the tested sample:
�� D 2 / D 4
Tangent value of loss angle of the tested sample:
tg �ģ� K �� M 1 �� M 2 �� / 15.5 ��
In the formula, K is the linear rate of change of the cylindrical capacitor, half of which is 0.33/mm. Each test fixture is labeled with a specific value inside the box cover.
Generally, the accuracy and repeatability of the results calculated according to the above formula can be met. However, for the tested sample with a high dielectric constant (i.e. the sample is placed and removed from the flat sample, and the scale value of the flat capacitor changes greatly), the edge effect capacitance will have a significant impact on the test. In this case, the following formula can be used for calculation:
�� C 2 + C F2 �� C F �� / C 1
tg �ģ� K �� M 1 �� M 2 �� / 3.46 �� C 2 + C F2 �� C F �� / C 1 ��
In the formula: C 1=D 1 scale, the air dielectric capacitance of the flat capacitor
[See attached figure (1)];
When C 2=D 3 scale, the air dielectric capacitance of the flat capacitor
[See attached figure (1)];
Edge effect capacitance at C F1=D 1 scale [see Figure (2)];
Edge effect capacitance at C F2=D 3 scale [see Figure (2)];
4. Other application usage methods
Using this testing device and Q-meter, relative measurements can be made on insulation materials and other high resistance thin materials, such as high-quality paper, high-quality wood, powder pressed materials, etc. The testing method is very simple and practical. By comparing the tested sample with the standard sample, slight differences between the two can be sensitively distinguished, such as changes in moisture content and raw materials used.
When testing, first place the standard sample into a flat capacitor, adjust the frequency of the Q-meter, and read the Q value after resonance. Then replace the tested sample, adjust the potentiometer of the cylinder, and resonate again. Observe the change in Q value. If the Q value changes very little, it indicates that the high-frequency loss values of the standard sample and the tested sample are the same. Otherwise, it indicates that there is a difference in performance between the two. For example, if the cylinder capacitor cannot resonate again after adjustment, resonance can only be achieved by adjusting the frequency of the Q-meter. If the frequency changes greatly, it indicates that the raw materials used for the tested sample and the standard sample are significantly different.

Five Repair Method
This testing device is a micrometer equipment composed of precision mechanical components, so vibration and collision should be avoided during use and storage. It is required to be used and stored in an environment that does not contain corrosive gases and is dry. Users cannot disassemble and assemble it by themselves, otherwise its working performance cannot be guaranteed. If the testing furniture is impacted or as a regular inspection, the following indicators should be tested:
1. The parallelism of the two poles of the flat capacitor shall not exceed 0.02mm.
2. The axis and axis concentricity error of the cylindrical capacitor shall not exceed 0.1mm.
3. Ensure a resolution of 0.01mm for two measuring rods.
4. Use a precision capacitance measuring instrument (with a resolution of ± 0.01pF) to measure the cylindrical capacitor. The capacitance shows a linear rate and is tested every 1mm from 0 to 20mm. It is required to meet the working characteristics requirements.

[Q Table]Q Dielectric loss testing device (matching with Q table)

2026-4-22 15:19:34

The S96 dielectric loss testing device is compatible with various high-frequency Q-meters and can be used to measure the dielectric constant and dielectric loss coefficient (loss tangent) of insulation materials. The S96 dielectric loss testing device is a replacement product of the S94, which uses a digital microscope measurement device, making it easy to read and accurate in data. The testing device consists of an LCD digital display micro measuring device and a pair of flat capacitor plates with adjustable spacing. Flat capacitor plates are used to clamp the tested material sample, while micro measuring devices display the thickness of the tested material sample. The S96 dielectric loss testing device must be equipped with a Q-meter as a tuning indicator instrument to measure the tangent value of the insulation material loss angle by observing the change in Q-value when the tested material sample is placed in a flat capacitor and not placed in the sample. The dielectric constant of the insulation material can be converted from the variation in the reading value of the spacing between the flat plates of the capacitor.

Technical characteristics of the S96 dielectric loss testing device (Q meter matching)
Flat capacitor: Pole size: �� 50mm/�� 38mm optional
Adjustable range of pole spacing: �� 15mm
2. Fixture plug spacing: 25mm ± 0.01mm
3. The tangent value of fixture loss is �� 4 × 10-4 (1MHz)
4. Micrometer resolution: 0.001mm

[Q Table]QBG-3D High Frequency Q Table

2026-4-22 15:19:29

The QBG-3D high-frequency Q-meter is a universal, multi-purpose, and multi range high-frequency impedance measuring instrument. It can measure the quality factor (Q value), inductance, capacitance, distributed capacitance, and distributed inductance of high-frequency inductors, high-frequency capacitors, and various resonant components. It can also measure the effective series and parallel resistance of high-frequency circuit components, the characteristic impedance of transmission lines, the loss tangent of capacitors, the high-frequency dielectric loss of electrical materials, dielectric constants, and so on. Therefore, high-frequency Q-meters are not only widely used in the production, scientific research, quality management, and other departments of high-frequency electronic components and materials, but also commonly used instruments in high-frequency electronics and communication laboratories. This machine is a replacement product for the old QBG-3B high-frequency Q meter, AS2851, and AS2852 high-frequency Q meter. Its testing circuit adopts optimized design, high-quality dielectric materials, and excellent coating technology to reduce residual value. The high-frequency signal source adopts DDS digital synthesis, Q-value measurement and display, which utilizes microcomputer technology and intelligent management. The frequency of the signal source is digitally locked, the resonant circuit automatically searches, and the testing standard frequency is automatically set, resulting in higher testing accuracy and greatly increasing the sorting and testing speed of the production line.

Q-value measurement: 1-999 three digit display, automatic range switching, can manually set measurement range
Inherent error �� 5% ± 2% of the full-scale value
Work error �� 7% ± 2% of full scale value
Inductance measurement: 0.1 �� H-1H error<5% ± 0.03 �� H
Test frequency: 10kHz-52MHz five digit digital display DDS digital synthesis
Equipped with automatic frequency standard setting, automatic search for resonance points, qualified Q value setting, and sound and light indication
Frequency error 3 × 10-5 ± 1 word
Tuning capacitor: Main capacitor: 40-500PF Error<± 1% or 1PF
Fine tuning capacitor: ± 3PF resolution 0.2PF

[Q Table]Digital high-frequency EN_1 table (EN_2- EN_3)

2026-4-22 15:19:24

As the latest generation of universal, multi-purpose, and multi range impedance testing instrument, AS2853A high-frequency Q meter has a testing frequency upper limit of 160MHz, which is currently the highest in China. The AS2853A high-frequency Q-meter adopts multiple leading technologies:
Dual scan technology - dual scan and automatic tuning search function for testing frequency and tuning capacitance.
Dual test element input - both the test frequency and tuning capacitance value can be entered through digital buttons.
Dual digital tuning - digital frequency tuning, digital capacitor tuning.
Automated measurement technology - automatically measure the Q value, resonance point frequency, and capacitance of the test piece.
Full parameter LCD display - digital display of main capacitance, inductance, Q value, signal source frequency, and resonant pointer.
DDS digital direct synthesis signal source - ensuring high fidelity of the signal source, high precision of frequency, and high stability of amplitude.
Computer automatic correction technology and test circuit optimization - minimize residual inductance in the test circuit, completely eliminating the confusion of correcting Q reading values at different frequencies.
AS2853A digital high-frequency Q-meter (100KHz -160MHz) main technical characteristics

Q-value measurement range	2~1023, range division: 30, 100, 300, 1000, automatic or manual shifting
Inherent error	�� 5% ± 2% of the full-scale value (200kHz~10MHz), �� 6% ± 2% of the full-scale value (10MHz~160MHz)
working error	�� 7% ± 2% of the full-scale value (200kHz~10MHz), �� 8% ± 2% of the full-scale value (10MHz~160MHz)
Inductance measurement range	4.5nH �� 140mH
Direct measurement range of capacitance	1 �� 200pF
Main capacitor adjustment range	18 �� 220pF
Accuracy of main capacitor adjustment	Below 100pF ± 1pF; Above 100pF ± 1%
Signal source frequency coverage range	100kHz �� 160MHz
Frequency segmentation (virtual)	100 �� 999.999kHz �� 1 �� 9.99999MHz,10 �� 99.9999MHz �� 100 �� 160MHz
Frequency indication error	3 × 10-5 ± 1 word

[Q Table]QBG-5 Electronic Label Tester

2026-4-22 15:19:12

The QBG-5 electronic tag tester is a tool that improves recognition efficiency and accuracy, and this technology will completely replace barcodes.

RFID radio frequency identification is a non-contact automatic identification technology that automatically identifies target objects and obtains relevant data through radio frequency signals. The identification work does not require manual intervention and can work in various harsh environments. RFID technology can recognize high-speed moving objects and simultaneously identify multiple tags, making operation fast and convenient.

RFID electronic tags are a breakthrough technology: "Firstly, they can recognize individual and very specific objects, instead of only recognizing one type of object like barcodes; secondly, they use radio frequency to read data through external materials, while barcodes must rely on lasers to read information; thirdly, they can simultaneously read multiple objects, while barcodes can only be read one by one. In addition, the amount of stored information is also very large

The QBG-5 electronic tag (RFID) tester (inductive Q-meter) is mainly used to measure the resonant frequency of electronic tags between 1MHz and 30MHz, as well as their Q value (the quality factor of electronic tags, the higher the Q value, the smaller the material loss, and the higher the efficiency)

	Main technical characteristics
Q-value measurement range	0-999
Q-value measurement error	��7��
Frequency measurement range	1MHz--30MHz
Measurement error of resonant frequency	1 × 10^-3± 1 word
Supports RS232 (RS232 interface optional)	Can connect to a computer to automatically save test data in text format

[Q Table]QBG-3E Full digital display high-frequency Q table

2026-4-22 15:19:04

The QBG-3E all digital display high-frequency Q meter inherits the digitalization and humanized design of high-frequency Q meters (QBG-3D and AS2853 high-frequency Q meters) over the years. It adopts three innovative technologies: digital main capacitor, LCD large screen liquid crystal display full parameters, and DDS direct digital synthesis, which greatly improves the technical performance and functionality of high-frequency Q meters. It completely changes the outdated situation of the old Q meter relying on two sets of auxiliary tables printed on the panel to calculate L, C, and Q. The QBG-3E high-frequency Q meter has clear reading, no need for conversion, easy operation, and is particularly suitable for quality analysis, quality control, scientific research and production of electronic components. It can also be used as a scientific research experimental instrument in electronic information, electronic communication, materials science and other majors in universities

Signal source frequency range	DDS digital synthesis 10KHz-60MHz	Q measurement range	1-1000 automatic/manual range
Signal source frequency coverage ratio	6000:1	Q resolution	4-digit significant number, resolution 0.1
Signal source frequency accuracy	3×10^-5± 1 word, 6-digit significant number	Q measurement work error	<5%
Inductance measurement range	15nH-8.4H, 4-digit significant number, resolution 0.1nH	tuning capacitor	Main capacitor 30-500PF
Inductance measurement error	<5%	Tuning capacitance error and resolution	± 1.5P or<1%
Standard measurement frequency point	Can be tested at any frequency in the entire band	Q Qualified preset range	5-1000 sound and light prompts
Resonance point search	auto-scan	Q-range switching	Automatic
Resonant pointer	LCD display	LCD display parameters	F,L,C,Q, Band, etc

[Q Table]WY2851A type Q table

2026-4-22 15:18:51

The WY2851A Q-meter is a universal, multi-purpose, and multi range high-frequency impedance measuring instrument. This machine is a replacement product for the old QBG-3 high-frequency Q-meter. By using a stable amplitude digital signal source and a broadband low impedance injection transformer, the tuning indication is stable and the frequency response error is small. Reasonable testing circuit design to reduce residual values. By adopting technologies such as automatic positioning and Q-value pre setting, as well as adding fast tuning and comfortable hand feel, the sorting and testing speed of the production line has been greatly increased. This instrument has a novel appearance, small size (about half of QBG-3), and light weight.

WY2851A is an improved version of WY2851. Due to the reduction of residual parameters in the test circuit, the Q value measurement at test frequencies above 25MHz reduces the Q value correction factor for standard coils. Suitable for testing the Q value of micro inductors.

The testing scope is the same as WY2851.

[Q Table]{{EN_1} table of Q type (QBG-3 improved version)

2026-4-22 15:18:48

WY2851 Q-meter (QBG-3 improved version) is a universal, multi-purpose, and multi range high-frequency impedance measuring instrument. This machine is a replacement product for the old QBG-3 high-frequency Q-meter. By using a stable amplitude digital signal source and a broadband low impedance injection transformer, the tuning indication is stable and the frequency response error is small. Reasonable testing circuit design to reduce residual values. By adopting technologies such as automatic positioning and Q-value pre setting, as well as adding fast tuning and comfortable hand feel, the sorting and testing speed of the production line has been greatly increased. This instrument has a novel appearance, small size (about half of QBG-3), and light weight.

Main technical specifications of WY2851 Q-table (QBG-3 improved version):
1. Q-value measurement:
Range: 10-1000
Four range: 30, 100, 300, 1000
Error: (based on mean)
Inherent error: ± 5% ± 3% of full scale
Work error: ± 7% ± 3% of full scale
2. Inductance measurement:
Range: 0.1 �� H to 100mH
Six range: 0.1-1 �� H, 1-10 �� H, 10-100 �� H, 0.1-1mH, 1-10mH, 10-100mH
Error: 5% ± 0.03 �� H
3. Specification of tuning capacitor:
Range: 40~500PF
Error:<± 1% or 1PF
Fine tuning capacitor: ± 3PF
Resolution: 0.2PF
4. Signal source specifications:
Frequency range: 50KHz~50MHz, divided into six ranges, four digit LED digital display
Error: 0.5%
5. Pre set range of Q table:
50~300
6. Normal working conditions
Environmental temperature: 0 ��~40 ��
Relative humidity: �� 80%
Power supply: 220V ± 10%, 50Hz ± 4%
7. Dimensions and weight:
415 × 180 × 170 (mm) 7kg

[Q Table]EN_1 digital display meter (EN_2)

2026-4-22 15:18:36

The WY2851D digital Q meter (50MHz) is a high-frequency impedance measurement instrument based on the principle of series resonance, which measures the high-frequency effective inductance, Q value, capacitance value, and ��, tg �� of inductors, capacitors, insulation materials, etc The WY2851D digital Q meter has been digitized on the basis of the original WY2851Q meter, and the mechanical structure has been improved in terms of long service life.

Features:
*Our company's innovative automatic Q-value reading technology greatly improves the accuracy and speed of Q-measurement
*As low as 20nH residual inductance, ensuring minimal error in directly reading Q values at high frequencies
*Specially designed LCD screen with menu style display of multiple parameters, Q value, test frequency, tuning status, etc
*Q-value range automatic/manual range control
*Digital Q-value presetting can improve the reliability and speed of batch testing
*The VCO adjusts the test frequency, and its smooth continuous frequency variation enables convenient measurement of Q value for �� f.

Main technical performance:
1. Operating frequency range:
50kHz��50MHz, Four digit effective digital display, divided into six frequency bands
2. Q-value measurement range:
10-1000, divided into three levels: 10-100, 30-300, 100-1000
3. Inherent error of Q value:
± 5% ± 3% full scale value
4. Effective inductance measurement range:
0.1��H��100mH��
5. Inductance measurement error:
�� 5% ± 0.02 �� H
6. Tuning capacitor characteristics
6.1 Adjustable capacitance range:
40pf~500pf��
6.2 Accuracy:
± 1% or 1PF
6.3 Fine tuning capacitance:
± 3pf adjustable, ± 0.2pf resolution
6.4 Residual inductance value:
About 20nH
7. Q preset function:
Preset range: Q: 10-1000 is acceptable. After the tested component reaches the preset value, there will be a "GO" display and a beep sound prompt. Unqualified parts will display "NO GO"
8. Dimensions/Weight:
415 × 180 × 170 (mm), 7Kg.

[Q Table]WY2853 type Q table

2026-4-22 15:18:18

The WY2853Q meter is a high-frequency impedance testing instrument that tests frequencies ranging from 0.7MHz to 110MHz. Specially suitable for high-frequency characteristic testing of distributed parameters of inductors and other devices and components of micro inductors. This Q-table is also a high-frequency signal generator with excellent frequency amplitude characteristics, making it a highly versatile measuring instrument.

Features:
*Well designed overall structure tuning capacitor: total residual inductance as low as 0.008 �� H (8nH), tuning minimum capacitance as low as 14pf
*It is a 0.5MHz~105MHz digital high-frequency signal source: output amplitude>1Vrms, 50 �� load:+10dBm, 5-digit LED digital frequency.
*The latest developed high impedance Q-value indicating voltmeter: indicating frequency response: 0.5MHz~120MHz ± 0.2dB, input capacitance<1.2Pf, automatic zero position function.
*Broadband low impedance injection transformer: equivalent series resistance<10m �� (0.01 ��)
*The Q-value preset function facilitates quick detection of the production line

Main technical indicators:
1. Digital display frequency:
0.7MHz��110MHz
2 Tests Q:
10~1000
3 tests for L:
0.02��H��2mH
4. Tuning capacitors:
1005Pf��220Pf
5 Total residual sensations:
�� 0.008 �� H. It is also a 100MHz digital signal source with an output of>10dBm (50 �� load)
6 External dimensions:
415 (width) × 180 (height) × 170 (depth) (mm)

[Q Table]EN_1 digital display meter (EN_2)

2026-4-22 15:18:09

The WY2853D digital Q meter (50kHz-150MHz) is a high-frequency impedance measurement instrument based on the principle of series resonance, which measures the effective inductance, Q value, capacitance value, and ��, tan �� of inductors, capacitors, insulation materials, etc. at high frequencies. The WY2853D digital Q meter has been intelligently digitized based on the original WY2853 Q meter, expanding the measurement range and improving the long service life of the mechanical structure. This Q meter follows the national metrological verification regulations: "JJF1073-2000 High Frequency Q Meter Calibration Specification".

One characteristic:
Our company's innovative automatic Q-value reading technology greatly improves the accuracy and speed of Q-measurement.
DPLL synthesis generates test signals, with digital settings and continuous adjustment of signal frequency.
�� Tune the residual inductance of the circuit to 8nH to ensure minimal error in directly reading the Q value at high frequencies.
Specially designed LCD screen with menu style display of multiple parameters: Q value, test frequency, tuning status, etc.
�� Q-value range automatic/manual range control.
Digital Q-value preset can improve the reliability and speed of batch testing.
�� Independent 50kHz~150MHz signal source output port, so this machine is also a 150MHz synthetic signal source, with frequency accuracy of ± 50ppm and stability of ± 10ppm.

Main technical specifications of WY2853D digital Q meter (50kHz-150MHz):
2.1 Operating frequency range: 50kHz~150MHz, five digit effective digital display.
2.2 Q-value measurement range: 1-1000; Divided into four levels: 1-30, 10-100, 30-300, 100-1000.
2.3 Intrinsic error of Q value: ± 5% ± 3% of full-scale value.
2.4 Effective inductance measurement range: 0.02 µ H to 200mH.
2.5 Inductance measurement error: �� 3% ± 0.01 µ H
2.6 Tunable capacitor characteristics:
2.6.1 Adjustable capacitance range: 13pF to 220 pF.
2.6.2 Accuracy: ± 1% or 0.5pF.
2.6.3 Capacitance measurement range: 1pF to 200pF.
2.6.4 Capacitance measurement error: ± 1% ± 0.5pF.
2.6.5 Residual inductance value: about 8nH.
2.7 Q preset function:
2.7.1Q preset range: 5-999 is acceptable. After the tested component reaches the preset value, there will be a "GO" display and a beep sound prompt. Unqualified parts will display "NO GO".
2.8 Dimensions and weight: 415 × 180 × 170 (mm), 7kg.