ADD770 spark plug tester is a product that can detect whether the spark plug is damaged. It is suitable for spark plug manufacturers, spark plug dealers, car owners, and auto repairers. It can be used to determine whether the ignition system fault is caused by the spark plug.
The ADD770 spark plug tester is a digital diagnostic tool for checking spark plug condition. It is intended for spark plug manufacturers, distributors, vehicle owners, and automotive technicians to assess performance and determine replacement needs.
The manual explains safety precautions, step‑by‑step operation, and how to replace the internal batteries. It also lists the applicable range of users and describes the indicator behavior for good versus faulty plugs. This manual is written in Chinese.
| Typical Spark Plug Service Life | 15,000 km (standard) / 30,000 km (long‑life) |
|---|---|
| Battery Type | Two 5# batteries |
When the tester’s indicator shows a strong electric spark, the plug is good; a weak or absent spark indicates a faulty plug.