Tonghui passed ISO9000: 2000 Quality Management System Certificate. 2003 High-performance TH2818XA/XB Automatic Transformer Testing System with absolutely independent intellectual property launched into market. The company purchased land of No.1 Tianshan Road and accessorial buildings, which combined with the original factory to be the new one with land area of 14,000 square meters, construction area of 8,200 square meters. Tonghui was assessed to be “New & Hi-tech Enterprise” by Jiangsu Science and Technology Department. Tonghui was admitted to be a formal member of China Electronic Instrument...

CHANGZHOU TONGHUI ELECTRONIC CO.,LTD. Http://www.tonghui.com.cn ■ Changzhou Tonghui Electronic Co., Ltd. was founded in 1994. It is a privately -owned technology-based company of research and development, manufacture and marketing. It has been appraised as the “High-Tech Enterprise in Jiangsu Province”. It is located in the National Development Zone-Changzhou Hi-Tech Industry Development Zone with beautiful environment and convenient traffic.Covering a land area of 12,000 square meter with a construction area of 8,200 square meter,it has more than 120 employees,and 75% of them are technicians....

Catalog 2021 Table of Contents Component Parameter Test Instruments LCR Meter TH2839 Series Impedance Analyzer TH2838 Series Precision LCR Meter TH2829 Series of Automatic Component Analyzer TH2827 Series of Precision LCR Meter TH283X Series Compact LCR Meter TH2822 Series Handheld LCR Meter Capacitance Meter TH2638/TH2638A Precision Capacitance Meter Electrolytic Capacitor Leakage Current Meter TH2689/TH2689A Capacitor Leakage Current/IR Meter DC Bias Current Source TH1778A Series DC Bias Current Source TH1773 DC Bias Current Source TH902A/TH903A Inductance DC Bias Test System Transformer,Motor...

Catalog 2021 Table of Contents TH8200 Series DC Electronic Load TH8300 Series DC Electronic Load TH8400 Series DC Electronic Load TH3300 Series Digital Power Meter TH3400 Series Digital Power Meter TH7100 Series Programmable AC Power Supply Cable/Harness Tester TH8601/A Cable/Harness Tester Safety Tester/Hipot Tester TH9520 Winding Component EST Tester TH9010/A Parallel 8-channel Hipot Tester TH9200 Series Hipot Tester TH9310/TH9320 Series Hipot Tester Resistance Tester AC/DC Low-Ohm Meter TH2512+ Series DC Low Resistance Meter TH2518 Series Resistance/ Temperature Scanner Insulation Resistance...

Component Parameter Test Instruments A. TH2839 Series Impedance Analyzer High accuracy:Auto-balance bridge technology, 4-terminal pair High stability and consistency:Up to 15 test ranges High speed:Up to 7.7ms High resolution:7- inch, 800×600 201 Points List Sweep Function Multi-parameter Graphic Sweep Function Varactor diode automatic polarity function 10 bins sorting, sorting result with sound and light alarm Storage space: Internal: 40 groups of setting files USB External: 500 groups of setting files, data log files and image files ■ Simultaneous testing for Ls-RDC ■ High compatibility: Support...

Component Parameter Test Instruments A. TH2839 Series Impedance Analyzer Highest accuracy Cable length Logarithm, linearity Sweep points Graph sweep FREQ, ACV, ACV/I, DCV/I, DC voltage source 51, 101, 201, 401 or 801 Equivalent circuit analysis USB HOST, USB DEVICE, LAN, HANDLER, RS232C, SCANNER, Temperature Input sensor Optional: GPIB Warm-up time Input voltage Power consumption Dimension(WxHxD)mm Standard accessories Three core power cord TH26010 Gold-plated short circuit board TH26011BS 4 Terminal Kelvin Cable Test fixture Four-terminal test fixtur

Component Parameter Test Instruments A. TH2838 Series Precision LCR Meter ■ High accuracy:Adopt Auto-balance bridge technology, 4-terminal pair ■ High stability and consistency:Up to 15 ranges ■ High speed:Up to 5.6ms ■ High resolution:7- inch, 800×600 ■ High power: Signal source:Voltage up to 20Vrms(only TH2838H) Current up to 100mA(only TH2838H) DC bias:Voltage up to±40V(only TH2838H) Current up to 100mA Up to 120A when controlling 6 sets of TH1778 series DC Bias Current Source by external DC Bias interface Independent Voltage Source: ±10V programmable output (only TH2838H) ■ Multi-parameter...

Component Parameter Test Instruments A. TH2838 Series Precision LCR Meter Specifications Model Test Signal Source Output impedance Range Rated value(ALC OFF): Set the voltage as the Hcur voltage when the test terminal is open Set the current as the Hcur current when the test terminal is short Constant value(ALC ON): Keep the voltage in DUT is the same as the set value Keep the current in DUT is the same as the set value Voltage range Voltage range Current range Voltage range DC Bias Current range Resolution Voltage range Voltage source Current range

Component Parameter Test Instruments A. TH2838 Series Precision LCR Meter Test function Test parameter Cp-D,Cp-Q,Cp-G,Cp-Rp Cs-D,Cs-Q,Cs-Rs Lp-D, Lp-Q, Lp-G, Lp-Rp, Lp-Rdc Ls-D, Ls-Q, Ls-Rs, Ls-Rdc, Rdc R-X, Z-θd, Z-θr G-B, Y-θd, Y-θr Vdc-Idc Mathematics function A(X+B)+C, X is test parameter, A, B,C is input parameter Equivalent circuit Series, parallel Deviation measurement Absolute deviation Δ compared with the nominal value Percentage deviation Δ% compared with the nominal value Calibration function OPEN, SHORT, LOAD Range selection Trigger mode Trigger delay Test terminal configuration Test...

Component Parameter Test Instruments A. TH2838 Series Precision LCR Meter List sweep comparator Set one pair of lower limit and upper limit for each sweep point. Optional: judge through the first sweep parameter / judge through the second sweep parameter / not used in each limit. List sweep time tag In SEQ mode, set the trigger point to 0, by defining the time, the test start time can be recorded at each measurement point. Graph sweep analysis Sweep points Sweep trace Primary or secondary parameters Display range AUTO, HOLD Coordinate scale Logarithm, linearity Sweep parameters Test frequency,...