MAS830L is a 3 1/2 digit digital multimeter produced by Shenzhen Huayi MASTECH. The instrument has a 15mm high liquid crystal display with clear readings. The whole machine circuit design is based on large-scale integrated circuit double integration A/D converter as the core, and is equipped with overload protection circuit, making it a small and excellent tool instrument.
This manual introduces the MAS830L handheld 3½‑digit digital multimeter, describing its LCD display, backlight, and function/range selector. It explains how to connect test leads, select measurement modes, and interpret the display.
Safety information, maintenance procedures, battery and fuse replacement, and detailed measurement tables for voltage, current, resistance, diode, continuity, and transistor tests are provided, along with the instrument's technical specifications and accessories. This manual is written in Chinese.
| Accuracy (DC voltage 200 mV‑200 V) | ±0.5% reading ±2 digits |
|---|---|
| Accuracy (DC voltage 600 V) | ±0.8% reading ±2 digits |
| Accuracy (AC voltage) | ±1.2% reading ±10 digits |
| Maximum input voltage | CAT II 600 V |
| Fuse rating | 200 mA / 250 V fast‑blow |
| Power source | 9 V battery (NEDA 1604 or 6F22) |
| Display character height | 15 mm |
| Dimensions | 138 mm × 69 mm × 31 mm |
| Weight | ≈ 170 g |
| Operating temperature | 0 °C to 40 °C |
| Storage temperature | ‑10 °C to 50 °C |
It uses a 9 V battery, either NEDA 1604 or 6F22.
Replace it with a 200 mA/250 V fast‑blow fuse of the same specification.
The instrument is rated for CAT II 600 V maximum input voltage.
Press the BACK LIGHT key; the backlight stays on for about 5 seconds and then turns off automatically.