B Type Electric Spark Vacuum Detection Equipment

一 Profile
This product's function is to detect the vacuum degree of all kinds of devices. It is safe and easy to use, which is your first choice to test electron tubes, cathode ray tubes, gas laser tubes, and light bulbs.

二 Main Performances
1. Length of Spark Bunch: ≥20mm
2. Working Time: intermittence use
3. Increasing Degree of Temperature: below 60°C after using for half an hour
4. Voltage : 220v ±10%
5. Frequency: 50HZ±3HZ
6. Power: ≤70w
7. Detectoion Range: 200 - 10-3

三 Operation Principle
1.Electric Principle Picture

2.Illustrating the Principle

After putting on the electric power, L1 and CD react. Spark appears between two touching points, and C and L2 connect. The High frequency voltage that L3 reacts and produces will lead to the appearance of high frequency spark. Then you can work with it.

四 Adjustment and Usage
Insert the plug of discharging spring on the socket and the power plug. You will see purple spark. There are at lest 3 spark lines when the discharging spring moves to any metal. If not, adjust the back switch till the spark becomes the most and longest.
Then you can begin to detect the devices. When the vacuum degree is high, the purple spark only appears the glass outside. If there is some ionization phenomena and light, it shows that the degree is low.

五 Precautions
1.This product should be used intermittently. If you want use it for long time, the temperature should not pass 120°C.
2. When using, you cannot touch the conical part of the coil. It is dangerous. And metal cannot, either. Or the spark will burn the coil.
3. Move the detection equipment continuously when detecting. Don't pass 5 s in one place lest that the glass breaks.
4. The end of the product may be erode after used for a period of time. You can rub it to use with sand paper.
5. When not used, the turn switch should be turn out. If you use it, turn the switch slowly in case that shortcut happens.