TH2512/TH2512A is a digital display four-terminal resistor tester produced by Tonghui Electronics. It is mainly used to measure the resistance of SMD surface mount resistors.
The TH2512 and TH2512A are intelligent low‑resistance testers designed for measuring resistances from milliohms up to several megohms. They feature automatic range selection, GPIB (IEEE‑488) interface, and a sorting function for quality control.
This manual explains how to install the instrument, use the panel keys, select ranges, perform zeroing, operate the sorting mode, connect via GPIB, and understand the technical specifications. It also includes safety notes, warranty information, and a parts list for the complete set. This manual is written in Chinese.
| Measurement range | 20 mΩ – 2 MΩ (TH2512) / 200 mΩ – 200 kΩ (TH2512A) |
|---|---|
| Basic accuracy | 0.05 % + 2 digits |
| Test speed | Fast 10 tests/s, Slow 2.5 tests/s |
| Power supply | 220 V 50 Hz |
| Operating temperature | 0 °C – 40 °C |
| Storage temperature | -40 °C |
| Interface | GPIB (IEEE‑488) |
Press the front‑panel clear key; the instrument will zero the displayed resistance value.
Turn the sorting function ON; the display will show resistance values as percentages and indicate PASS, LOW, or HIGH based on preset limits.