技术指标：
| 1999 位即3 1 /2 位数字液晶显示，有电池低能量提示符 | DT-991L | DT-992L | DT-998L | ||
| 量程 | 分辨率 | ||||
| 直流电压 | 200mV | 0.1mV | ±0.5% ±2d | ±0.5% ±2d | ±0.5% ±2d |
| 2000mV | 1mV | ||||
| 20V | 10mV | ||||
| 200V | 100mV | ||||
| 600V | 1V | ±0.8% ±2d | ±0.8% ±2d | ±0.8% ±2d | |
| 交流电压 | 200V | 100mV | ±1.2% ±10d | ±1.2% ±10d | ±1.2% ±10d |
| 600V | 1V | ||||
| 直流电流 | 200uA | 0.1uA | — | — | — |
| 2000uA | 1uA | ±1.0% ±2d | ±1.0% ±2d | ±1.0% ±2d | |
| 20mA | 10uA | ||||
| 200mA | 0.1mA | ±1.5% ±2d | ±1.5% ±2d | ±1.5% ±2d | |
| 10A | 10mA | ±3.0% ±2d | ±3.0% ±2d | ±3.0% ±2d | |
| 电阻(Ω) | 200Ω | 0.1Ω | ±0.8% ±3d | ±0.8% ±3d | ±0.8% ±3d |
| 2000Ω | 1Ω | ±3.0% ±2d | ±0.8% ±2d | ±0.8% ±2d | |
| 20kΩ | 10Ω | ||||
| 200kΩ | 0.1kΩ | ||||
| 2000kΩ | 1kΩ | ±1.0% ±2d | ±1.0% ±2d | ±1.0% ±2d | |
| 温度 | -20℃～1370℃ | 1℃ | — | — | 0℃～400℃ ±1.0% ±3d 400℃～750℃: ±2.0% |
| 二极管测试 | 有 | — | — | ||
| 三极管测试 | 有 | 有 | 有 | ||
| 短路测试 | 短路蜂鸣测试 | 有 | 有 | 有 | |
| 测试方波输出 | — | 有 | — | ||
| 数据保持▅功能 | 有 | 有 | 有 | ||
| 背光显示 | 有 | 有 | 有 | ||
