623 Digital Car Multimeter – 20000 Counts True RMS, AC/DC 1000V, 10A, RPM & Dwell, Pulse Width (ms), Duty Cycle, NCV, Capacitance, Temperature, Rechargeable
Specifications
| Parameter | Value |
|---|---|
| Model | 623 Digital Car Multimeter |
| Display | Backlit LCD, 20000 counts (max display 19999) |
| True RMS | Yes |
| Operating mode | Manual range (range auto selection per function) |
| Sampling rate | ~2 times per second |
| Auto power off | ~15 minutes no operation |
| Operating temperature | 0–40 °C |
| Storage temperature | -20 to 60 °C |
| Max terminal-to-ground voltage | 1000V DC / 750V AC |
| Power supply | 3.7V 1800mAh rechargeable lithium battery |
| Weight | 341 g |
| Material | ABS |
| Certification | CE |
| High-concern chemicals | None |
| Smart device | No |
Measurement ranges and accuracy
| Function | Range | Resolution | Accuracy |
|---|---|---|---|
| AC current | 0mA–10A | 0.01mA–0.001A | ±(0.8% rdg + 5 counts) |
| DC current | 0mA–10A | 0.01mA–0.001A | ±(0.5% rdg + 5 counts) |
| AC voltage | 1mV–750V | 0.01mV–0.1V | ±(0.5% rdg + 5 counts) |
| DC voltage | 0.5mV–1000V | 0.01mV–0.1V | ±(0.25% rdg + 5 counts) |
| Capacitance | 0nF–20mF | 0.01nF–0.01mF | ±(2.5% rdg + 20 counts) |
| Resistance | 0Ω–20MΩ | 0.1Ω–0.01MΩ | ±(0.5% rdg + 5 counts) |
| Frequency | 0Hz–10MHz | 0.01Hz–0.01MHz | ±(2.5% rdg + 5 counts) |
| Duty cycle | 10%–90% | 0.1 | ±(0.2% rdg + 5 counts) |
| Temperature (°C) | -40°C–1000°C | 1°C | ±(2.5% rdg + 5 counts) |
| Temperature (°F) | -40°F–1832°F | 1°F | ±(2.5% rdg + 5 counts) |
Automotive and advanced functions
| Feature | Supported |
|---|---|
| Engine speed (RPM) | Yes |
| Engine dwell angle | Yes |
| Pulse width (ms) | Yes |
| NCV non-contact voltage | Yes |
| Diode test + continuity buzzer | Yes |
| Live wire indication | Yes |
| MAX / MIN | Yes |
| REL (relative) measurement | Yes |
| Data hold | Yes |
| Low battery indication | Yes |
| Lithium battery charging | Yes |
The 623 is a professional automotive-focused digital multimeter designed for both electrical diagnostics and engine signal testing. With a high-resolution 20000-count backlit LCD and True RMS capability, it delivers accurate readings for workshop and garage use. It measures standard electrical values such as AC/DC voltage, AC/DC current, resistance, capacitance, frequency and temperature, while adding car-specific functions including engine speed (RPM), dwell angle, and pulse width (ms) for injector/ignition related signal checks.
The 623 uses manual range selection but can automatically choose the measurement range once a function is selected, and it includes full-range overload protection. It is powered by a built-in 3.7V 1800mAh rechargeable lithium battery, supports charging, and shuts down automatically after about 15 minutes of inactivity to save power. Maximum allowable voltage between the measuring terminal and ground is 1000V DC or 750V AC, which matches the specified measurement limits.
Technical correction: the listing mentions “Max count: 20000 counts” and elsewhere “Maximum display value 19999 digits”. These are effectively the same class of meter; it’s safest to publish it as 20000 counts (max display 19999).
Package contents
Item 1: 1 × Multimeter
Item 2: 1 × Packing box
Item 3: 1 × Storage bag
Item 4: 1 × Manual
Item 5: 1 × Temperature lead
Item 6: 1 × Test lead set
Item 7: 1 × Charging cable
Item 8: 1 × 16-in-1 combination lead set (according to selected package)