UT33A is a multifunctional, stable performance, low power consumption, fashionable structure, safe and reliable small hand-held 3 3/4 bit automatic range digital multimeter. It can be used to measure AC and DC voltage and current, resistance, diode forward voltage drop and continuity test, transistor hFE parameters, and is an ideal maintenance tool for the majority of users.
This manual introduces the UNI‑T UT33A handheld 3 3/4‑digit automatic‑range digital multimeter, covering safety information, unpacking checks, and the device’s physical layout. It explains key safety symbols, operating rules, and the functions of each button and display symbol.
Detailed technical specifications, measurement procedures, battery replacement steps, and maintenance tips are provided. The document also includes guidance on proper use of the input terminals, fuse information, and automatic shutdown behavior. This manual is written in Chinese.
| Maximum input voltage | 500 Vrms |
|---|---|
| 10 A terminal fuse | None |
| mA terminal fuse | 5×20 mm, 0.5 A/250 V |
| Range selection | Automatic |
| Maximum display count | 3999 (3 3/4‑digit) |
| Operating temperature | 0 °C ~ 40 °C |
| Dimensions | 130 mm × 73.5 mm × 35 mm |
| Weight | ≈156 g |
The highest voltage between the input terminal and ground is 500 Vrms.
When the LCD shows the battery‑low symbol, remove the old 1.5 V AAA battery and install a new one following the steps shown in the manual.
The multimeter operates from 0 °C to 40 °C.
Do not apply more than 500 V between the instrument terminals and ground to avoid electric shock or damage.