Trial method and precautions of electrostatic tester1

Electrostatic Tester: Instrument Description: This instrument can test electrostatic voltages from 50 to 200 kV and display the positive and negative voltages. The instrument not only investigates the nature and cause of electrostatic problems, but also monitors the use of electrostatic control devices in operation. First move the instrument away from the power source Press the bottom of the instrument to activate and zero the instrument; press and hold the bottom to bring the instrument close to the power source; take a reading at a distance of 150 mm. The instrument is small enough to fit in a pocket and simple to operate. LEDS on the detector surface enable accurate operation and visual results. 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 a display Size: W: 65 mm D: 150 mm H: 30 mm Weight: 500 g principle Use given The high-voltage electric field is used to discharge the sample to be tested regularly to induce static electricity in the sample, so as to detect the amount of static electricity, the half-life of static voltage and the residual amount of static electricity to determine the electrostatic performance of the sample to be tested. Mainly used to determine the electrostatic properties of textile raw materials and finished products (including fibers, yarns, fabrics, carpets, decorative fabrics) under laboratory conditions, and can also be used to determine other sheet and plate materials such as paper, rubber, plastic, Electrostatic properties of composite sheets, etc. 1: Formation of resin products, processing of film, etc. 2: Integrated circuit board printing. 3: ESD protection of electronic components. 4: Optical machines, dust removal and electricity removal of precision parts. How to use: single press to reset to zero, single press to display to lock idle, automatic shutdown, battery performance display function: effective detection of electrostatic charge on ESD workplace equipment, work surfaces, and tools. Features: LCD/level display test data, test data hold, digital zero display, high/low range. Output: Red LCD displays positive charge, blue LCD displays 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 Graphical display: positive: red/negative: blue Power off: idle for about 5 minutes. Switch between measurement modes. Electrostatic field: single press the Power button, there will be a beep sound for ion balance (please install the ion balance measurement board first). Check whether the power supply complies with the regulations, whether the instrument shell (including the outer shielding cylinder of the probe) is well grounded, and the instrument can be tested only after the instrument is cleared. 2. The test probe should be prevented from being in the space position of a certain shareholder perpendicular to the surface of the charged object to be tested (according to 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 body under test and the probe shell, when starting the measurement, the probe must be placed far away (away from the charged body) and gradually approach the charged body. 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. . 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 test accuracy. The inductive electrostatic field tester is essentially a test of a local electric field of the charged body under test. Therefore, 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, the test accuracy of the instrument will be reduced, and if it is too shallow, it will be 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, and accurate measurement is difficult to achieve in actual work due to various factors. 8. Usually, the electrostatic voltmeter used in the electronics industry should consider the test accuracy and should be able to test±10v electrostatic voltage. More about Electrostatic Tester: http://www.standard-groups.com/TextileGarment/1654.html

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