Detailed explanation and description of human body comprehensive tester

EST301 Human Comprehensive Resistance Tester

I. Overview:

Human body static electricity is the main and most frequent factor that causes accidental explosion of electric pyrotechnics, damages electronic devices, and causes equipment malfunctions. Therefore, domestic and foreign requirements for electrostatic protection of electric pyrotechnics, electronic devices, and equipment are The human body is mainly protected by static electricity. Among the anti-static problems of the human body, measuring the comprehensive resistance of the human body is one of the most important effective methods.

The device is an intuitive light-emitting diode display measuring device designed for measuring the comprehensive static resistance of the human body (including the resistance of the human body, shoes, socks, etc.). This instrument can detect and alarm the resistance of human body static electricity (greater than 109 ～ 1010Ω) that can easily accumulate danger. When the comprehensive resistance of the human body is too small (less than 104Ω), the staff may accidentally touch the power (220V or 380V). Accidents caused by electric shock also alarm, to prevent personnel from electric shock accidents. This instrument has a wide measurement range and high resolution (eight orders of magnitude), there are two working modes: "foot-foot" working mode and "hand-foot" working mode, So that it can adapt to a variety of measurement requirements.

Although the staff wear anti-static work clothes or work shoes, when the staff wear non-anti-static socks or non-anti-static insoles, etc., the static electricity generated by the human body cannot be introduced into the ground. The system can test the integrated resistance between the two feet and the human body at the same time. When the comprehensive resistance of the human body is too large, static electricity cannot leak into the ground and there is a danger of static discharge, the instrument alarms. When the comprehensive resistance of the human body is too small, if the staff accidentally touches the power (220V or 380V) to cause an electric shock injury, the instrument can also alarm, and the system can indicate (measure) the comprehensive resistance value between the human bodies.

Second, the scope of application:

The entrance of key electrostatic protection areas such as scientific research and production workshops, warehouses and other industries in the pyrotechnics, petroleum, chemical, textile, paper, rubber, printing, electronics, telecommunications, aerospace, aviation, and computer industries.

3. Features:

2 8-level LED display, wide measurement range.

2 The display is intuitive and easy to read.

2 Alarm when the integrated resistance is too high or too low.

2 Power saving, can be used for half a year to one year after changing the battery, battery undervoltage indication.

2 The measurement is accurate and rapid.

Fourth, the main technical indicators

1. Test range: 103 ～ 1010 ohm

2. Power supply: 6V battery

3. Accuracy: 1/2 division value

4. There are three indication alarm areas:

Critical zone of over-resistance: high-resistance red light indicates and alarms

Safe area: green light indication

Low resistance danger zone: low resistance red light indicates and alarms

1. When the resistance is between 103 and 104 Ω, the corresponding red light-emitting diode emits light, which means that the human body's comprehensive resistance is too small. If the staff accidentally touches the power (220V or 380V), it will cause an electric shock injury. There will be an alarm sound.

2. When the resistance is between 105 and 108 ohms, the corresponding green light-emitting diode emits light, indicating that the shoes worn by the human body meet the anti-static safety requirements.

3. When the resistance is 109Ω, the corresponding yellow light-emitting diode emits light, indicating that the anti-static performance of the shoes and the like worn by the human body is not good.

4. When the resistance is greater than or equal to 1010Ω, the corresponding red light-emitting diode emits light, indicating that the shoes worn by the human body do not meet the anti-static performance requirements. There will be an alarm sound.

5. How to use:

1. Panel description

2. Installation and use steps:

Place the detector at the entrance of an important department. When detecting the resistance of the human body, the two feet of the person to be tested stand on the two metal electrodes of the detector, and the power switch is pressed by hand. The resistance value judges whether the comprehensive resistance of the human body meets the safety requirements of anti-static. When the battery voltage is insufficient, the under-voltage indicator will glow, and the battery should be replaced.

3. Work mode selection:

Hand-foot working mode: In this working mode, the instrument measures the parallel resistance of the human hand through the feet to ground. If you raise one foot, you can measure whether the static resistance of the other foot to the ground is qualified. This can measure the static resistance of both feet.

Foot-to-foot working mode: When the switch is set to this working mode, the instrument will measure the resistance in series between the feet of the human body, and an alarm will sound when the electrostatic resistance of any foot does not meet the requirements.

If there are no special requirements, you can choose one of the two modes.

When the battery voltage is insufficient, the under-voltage indicator will glow, and the battery should be replaced next time.

Download the instrument manual (PDF)