UT602/UT603 is a stable, reliable and safe handheld 3 1/2-digit manual range switching digital instrument. It has functions for measuring resistance, diodes, buzzer on/off, capacitance, inductance, and transistor parameters. This instrument is suitable as a maintenance tool for a wide range of users.
The UT602 (inductance meter) and UT603 (inductance‑capacitance meter) are handheld 3½‑digit digital instruments designed for measuring resistance, capacitance, inductance, diodes, and transistor gain. They feature a large LCD, manual range switching, and built‑in data‑hold capability.
This manual covers unpacking, safety rules, electrical symbols, key functions, display symbols, detailed operating procedures, technical specifications, battery and fuse replacement, and routine maintenance to ensure accurate and safe measurements. This manual is written in Chinese.
| Battery type | 9 V alkaline |
|---|---|
| Fuse rating | φ5×20‑F 0.315 A / 250 V |
| Operating temperature | 0 °C ~ 40 °C |
| Storage temperature | -10 °C ~ 50 °C |
| Maximum display value | 1999 |
| Update rate | 2‑3 times per second |
| Dimensions (W×H×D) | 172 mm × 83 mm × 38 mm |
| Weight (including battery) | ≈310 g |
| Altitude (working) | 2000 m |
| Altitude (storage) | 10000 m |
When the LCD shows the low‑battery symbol, disconnect the test leads, turn off the instrument, remove the battery cover screws, take out the old 9 V battery and install a new one.
Do not use the meter to test voltage and never apply more than 30 Vrms between the instrument terminals and ground; the measured capacitor must be discharged before testing.
Press the blue “HOLD” key to freeze the current measurement on the LCD; press it again to release the hold.
Press the blue “L‑C” key; the instrument enters capacitance mode while the key is pressed, and releases to inductance mode when released.