Trial method and precautions of electrostatic tester

Electrostatic tester: Instrument description: This instrument can test the electrostatic voltage of 50 to 200 kV and display the positive and negative poles of the voltage. This instrument can not only investigate the attributes and reasons of static electricity problems, but also monitor the usage of static electricity control devices during operation. First move the instrument away from the power source and press the bottom of the instrument to activate the instrument and zero the instrument; press and hold the bottom to make the instrument approach the power source; take a reading at a distance of 150 mm. The instrument is small in size and can be put into a pocket, and it is easy to operate. The LEDS on the surface of the detector can make the operation accurate and the result visible. Technical parameters: Range: 100V to 200kV at 150 mm, 50V to 50kV at 50 mm Accuracy: Calibration accuracy ±2% Construction: Aluminum texture, dry powder outer packaging Power supply: 9V battery can last for 60 hours; when the battery is low, there will be Display size: W: 65 mm D: 150 mm H: 30 mm Weight: 500 g principle uses a given high-voltage electric field to discharge the sample under test regularly to induce static electricity on the sample, so as to determine the amount of static electricity, the half-life of static voltage, and the The detection of the amount of static electricity to determine the electrostatic performance of the tested sample. Uses are mainly used to determine the electrostatic properties of textile raw materials and finished products (including fibers, yarns, fabrics, carpets, and decorative fabrics) under laboratory conditions. It can also be used to determine other sheet and plate materials such as paper, rubber, plastic, etc. Electrostatic properties of composite boards, etc. 1: Formation of resin products, processing of film, etc. 2: Integrated circuit board printing. 3: ESD protection of electronic components. 4: Dust removal and electricity removal of optical machines and precision parts. Usage: Single press to reset to zero, single press to display lock, idle and automatic shutdown. Battery performance display function: Effectively detect the electrostatic charge of ESD workplace equipment, work surfaces, and tools. Features: LCD/level display test data, test data retention, digital clear display, high/low range. Output: Red LCD shows positive charge, blue LCD shows negative charge Accuracy: low range accuracy: plus or minus 0.1kv high range accuracy: plus or minus 1kv input voltage: 9V, 6F22 nickel battery electrostatic field measurable: +/-( 0.00-20.0kV) (automatic display adjustment) standard distance measurement: 25mm+/-1mm ion balance measurable: +/-(0-200V) measurement distance according to: ESD－STM3.1-2000 ion balance standard LCD display update: every 5 times per second Response time: 1 second Working temperature and humidity: 10-40 deg C/RH: 0-60%R Graphic display: Positive: Red / Negative: Blue Sound alarm: Power on / Idle automatic shutdown / Automatically exceed the measurable range Power off: Idle for about 5 minutes. Measurement mode switch electrostatic field: Single press the Power button, there will be a beep ion balance (please install the ion balance measurement board first) Press Zero and Power at the same time, there will be two beeps. Check whether the power supply complies with the regulations, whether the instrument shell (including the outer shielding tube of the probe) is well grounded, and the instrument can be tested after resetting. 2. The test probe should be prevented from being at a certain shareholder's spatial position perpendicular to the surface of the charged object under test (the test distance specified in the instrument description), and the change of the test distance will lead to a large test error. In order to avoid spark discharge between the charged object under test and the probe shell, when starting the measurement, the probe must be placed farther (away from the charged object) and gradually approach the charged object. 3. When testing the surface potential, generally the surface of the charged body should be far enough away from the grounding body. If the charged body is in the form of a sheet or film, and the back is close to the grounding body, when the probe moves to the vicinity of the grounding body, there is a danger of space discharge or surface discharge due to the induction concentration of local charges. 4. When the measured part of the charged body is a large flat plate, the measured value is more accurate, but when the measured surface of the charged body has a certain radius of curvature, the measured value is quite different from the actual potential value. Up. 5. The influence of the instrument's own characteristics on the test accuracy should be considered, and calibration and calibration should be carried out regularly before use. 6. The shielding depth of the probe has a certain influence on the accuracy of the test. The inductive electrostatic field tester essentially tests a certain local electric field of the charged object under test, so the interference and influence of the external electric field on the test signal must be minimized. The usual method is to install this type of instrument and its probe in a grounded shielded shell. Obviously, if the outer shielding sleeve of the probe is too deep, it will reduce the test accuracy of the instrument. If it is too shallow, it is easily affected by the external electric field. 7. The value obtained by testing the surface potential of the object can be used as a qualitative reference. Accurate measurement is difficult to achieve in actual work due to various factors. 8. Generally, the electrostatic voltmeter used in the electronics industry should consider the test accuracy and should be able to test the electrostatic voltage of ±10v. More about static tester: http://www.standard-groups.com/TextileGarment/1654.html

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