This manual covers safety precautions, input protection limits, and proper grounding for the DM3058 digital multimeter. It also describes the device’s interfaces (RS‑232, USB, LAN, GPIB, USB‑flash) and the supported measurement functions such as voltage, current, resistance, capacitance, frequency, and arbitrary sensor measurements.
The document is organized into chapters: a quick‑start guide, panel operation, example applications, system prompts and troubleshooting, performance specifications, and appendices with accessories, warranty, cleaning, and contact information. This manual is written in Chinese.
| Resolution | 5 ½ digits |
|---|---|
| DC Voltage Range | 200 mV ~ 1000 V |
| DC Current Range | 200 µA ~ 10 A |
| AC Voltage Range (True‑RMS) | 200 mV ~ 750 V |
| AC Current Range (True‑RMS) | 20 mA ~ 10 A |
| Resistance Range | 200 Ω ~ 100 MΩ |
| Capacitance Range | 2 nF ~ 10000 µF |
| Frequency Range | 20 Hz ~ 1 MHz |
| HI‑LO Input Protection | 1000 VDC / 750 VAC (1000 Vpk) |
The HI‑LO inputs are protected up to 1000 VDC or 750 VAC, which is also expressed as a maximum of 1000 Vpk.
The grounding conductor must be connected to earth before connecting any inputs or outputs, and the product should be properly grounded via its power‑ground wire.