Operating specifications for wrist strap testers
Electrostatic ring, a device that is worn on the wrist of a human body and vents the body to accumulate electrostatic charges. It is divided into a wired type and a wireless type, and has a metal ring and an elastic conductive wire mixed ring. This product belongs to the anti-static wrist strap buckle adjustment wire type, it can effectively protect the zero-resistance parts, from the interference of static electricity, to discharge the static electricity of the human body. It consists of an anti-static elastic band, a snap button, a spring cord, a protective resistor and a collet. The inner layer of the elastic band is woven with an antistatic yarn, and the outer layer is woven with ordinary yarn. The principle of the anti-static wired wrist strap is to guide the static electricity of the human body to the earth through the wrist strap and the grounding wire. In use, the wrist strap is in contact with the skin and the ground wire is grounded directly for maximum effectiveness. Put on this anti-static wrist strap, which can safely remove static electricity generated in the human body within 0.1 seconds. The grounding wrist strap is the most basic and most commonly used in anti-static equipment.
How to detect the quality of anti-static wrist strap?
1. Put on the wrist strap and keep the wrist strap in good contact with the human body. Insert the wrist strap plug into the tester wrist strap jack;
2. Press and hold the "PUSH ON" button to test;
3. The green “PASS” LED indicates that the wrist strap is functioning properly; the red “LO” LED indicates that the resistance of the wrist strap after passing the wrist is lower than the lower limit of 750K, which may be a short circuit; the yellow “HI” LED indicates that the wrist strap passes the wrist. The resistance value is higher than the upper limit of 10M. When the above test fails, the tester should immediately check whether the wrist strap is well worn and retest. If the test is still unqualified, the wrist strap should be replaced and retested.
Note: 1. When testing by test button, the test state should be maintained until the test is completed (time is less than 1.0 second);
2. During the test, there may be a phenomenon that the “LO” LED is lighted first and accompanied by an alarm sound. This is normal, and the result is based on the last stable and continuously lit LED;
Check item:
1. The connection of the wrist strap to the grounding wire. 2. Contact impedance between the wrist strap and the skin.
Anti-static wrist strap test schematic
Anti-static wrist strap test schematic
3. Connection with grounding tools such as anti-static boards and mats.
Performance:
Quickly and easily check various grounding systems from any location. Avoid product damage due to static electricity.
Safeguard the safety of staff.
Precautions:
After about 50,000 operations, when the green "GOOD" light still lights up,
However, when there is no sound, it indicates that the battery needs to be replaced.