Capacitance Measurement: The primary function of a Capacitance Tester is to measure the capacitance of capacitors accurately. It determines the capacitance value, which indicates the component's ability to store electrical charge.
Equivalent Series Resistance (ESR) Measurement: Some advanced Capacitance Testers also measure the Equivalent Series Resistance (ESR) of capacitors. ESR is an important parameter that affects the performance and stability of capacitors, particularly in high-frequency applications.
Dissipation Factor (DF) Measurement: Capacitance Testers can measure the Dissipation Factor (DF) of capacitors, which indicates the energy losses within the component. DF is crucial in evaluating the efficiency and reliability of capacitors, especially in power electronics and high-frequency circuits.
■ Provide 0~20A of constant current output for single one
■ Support 6 machines at most and reach 120A of constant current output
■ Extreme refined current step: when <1A, reach 5mA; when <5A, reach 25mA; when <120A, reach 100mA
■ Adopting a new generation AC/DC superposition test theory to adapt test requirements for high precision and high frequency
■ Current output mode: single current, step scan
■ Adopting new designed friendly graphical operation interface and providing multiple operation practice
■ Providing real-time operation mode for all parameters and settings without waiting
■ New file management system with easy, prompt and accurate operation
■ Providing two kinds of SCPI command modes with good adaptability
■ New foot control mode with 5 control modes
■ Excellent tailing capability and extendibility, additional slave superposition depending on the demands
■ Offering dual-progress bar indication and corresponding small tools
■ Selectable Chinese and English interfaces
■ Friendly interface, easy operation and excellent performance
The instrument adopts a new generation AC/DC superposition test theory to adapt test requirements for high precision and high frequency.The built-in embedded MCU with high- performance can quickly respond to host and slave machine condition or malfunction and make real time indication, which helps improve the work efficiency. The new designed friendly graphical operation interface, included 5 foot control modes and full touch operation provides convenience and efficiency for users. New file management system with easy, prompt and accurate operation can save a group of real-time setting file and 99 groups of user-defined setting files. It can provide pushed information indication and cache 2 real-time information. Being provided with two modes of SCPI instruction systems, it is convenient to set up production lines or single machine test. Also, it can connects with any device with serial port and which refer to the SCPI instruction system design of this machine.
New Trend of AC/DC Superposition Test By virtue of profound technology and extensive market survey in bias current field, Tonghui introduced the large power DC bias current source— TH1778A. CortexM3 ARM CPU with high-performance, graphical interfaces and full-touch operation make TH1778A series DC Bias Current Source convenient and efficient for you.
TH1778A series is appropriate for AC/DC superposition test of magnetic inductors and test occasion for large current. Also, it can provide magnetizing current for the analysis of magnetic materials. The adopted new software framework is adapt to real-time parameter adjustment and operation.
1 Master-Slave connection mode is convenient for cutting and extending.
2 Graphic interface brings unprecedented operation convenience and rapid response to working condition of the machine.
3 Pushed information indication can keep concurrent status information.
4 Intelligent file management system makes file management and load not complicated any longer.
5 Multi-mode SCPI system makes the formation of production lines not tedious any more.
6 Multiple operator modes makes it easier to operate on the basis of personal habits.
7 Cabinet type system connection makes it convenient for users to arrange and set up production lines.
| Modle | TH1778A | |
| Display | Display | 480×272 16:9 24-bit true color TFT LCD |
| Interface | Complete graphic user interface | |
| Operation | Resistor type touch screen + entitative key + foot switch | |
| Current Step | 0mA-1.000A | 5mA |
| 1.000A-5.000A | 25mA | |
| 5.0A-120.0A | 100mA | |
| Supporting Test Frequency | 0Hz-2MHz | |
| Sweep Adjustment Time | 0mA-1.000A | 4ms-3600s |
| 1.000A-5.000A | 10ms-3600s | |
| 5.0A-120.0A | 20ms-3600s | |
| Minimum Interval of Sweep Adjustment Step | 0mA-1.000A | 5mA |
| 1.000A-5.000A | 25mA | |
| 5.0A-120.0A | 100mA | |
| Range | Host machine (TH1778A) | 1.000A/5.000A/20.0A |
| Slave Machine (TH1778AS) | 20.0A | |
| Maximum Output Voltage | 35V (when outputting 1.000A. Fordifferent ranges, please refer to the user manual) | |
| Maximum Permitted DCR | Rmax= (Ω)(Calculation ofRmax, please refer to the description in user manual) | |
| Maximum Permitted Inductance Value | Lmax= (mH)(Calculation ofLmax, please refer to the description in user manual) | |
| Range Mode | Auto | |
| Control Mode for START/STOP | START/STOP entitative key, 4 foot switches, Bus | |
| Max. Current Time for Continuous Loading | Keeping 2-3h, continuous output | |
| Function | Fault self-inspection; 99 groups of custom profile management; dual-progress bar indication; Chinese and English; soft switching of slave machine; real-time operation; SCPI command set; simple dual-display computer. | |
| Interface | RS232, SaverLink | |
| Work Environment | Temperature | 0℃-55℃ |
| Humidity | ＜90%RH | |
| Power Requirement of Adapter | Voltage | AC 220V/110V(1±10%) |
| Frequency | 50Hz/60Hz(1±5%) | |
| Power | ≤60VA | |
| Dimension(W×H×D)(mm) | Single one: 430×185×473(mm) (not including equipment cabinet) | |
| Weight | Single one: 18kg (not including equipment cabinet) | |
| Standard | ||||||
| Accessories name | Model | |||||
| Test Box | TH26004E-2 |  | ||||
| Test Box | TH1778-01 |  | ||||
| Test Fixture | TH1778-02 |  | ||||
| Test Fixture | TH1778-03 |  | ||||
| RS232 connection cable (with TH10101) (two holes at both ends, 2 and 3 feet cross) (2H/DB-9F 2/L 140 | TH26034 |  | ||||
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