The vacuum tester realizes the disassembly-free measurement of the vacuum interrupter and directly displays the vacuum value, so that the user of the vacuum circuit breaker can grasp the vacuum state of the arc extinguishing chamber in detail and provide a reliable basis for the planned replacement of the arc extinguishing chamber. The safe operation of the power grid provides a strong guarantee and overcomes the defect that the power frequency withstand voltage method can only judge whether the arc extinguishing chamber is scrapped. The instrument has high measuring accuracy, simple operation, convenient carrying, strong anti-interference ability, and is especially suitable for on-site testing of the power supply unit. It is one of the essential instruments for vacuum circuit breaker production, installation, commissioning and maintenance.
The use of vacuum tester should pay attention to what issues :
1, the instrument is a precision instrument, circuit board wiring density, generally require storage in a relatively dry place. If the environment is humid, you should always power on. 2. If the current value after the test shows zero, check the arc extinguishing chamber surface is clean. Because the surface is not clean, the change value of the leakage current may be greater than the ionization current value. In this way, the measured value minus the leakage is less than zero, and the instrument is judged as zero. After this happens, the surface of the arc extinguish chamber is cleaned and tested again. In general, the degree of vacuum obtained in this manner is more accurate.
3, when used, the high voltage output line must not touch the human body to prevent electric shock.
4. When the high-voltage indicator lights up, do not touch the high-voltage line and magnetron current line to prevent electric shock.
5, disassembly and printing paper in the case of the first power off the instrument, so as not to damage the printer. When changing paper, open the front panel, and use the index finger and thumb to pinch the two clips on both sides of the printer and gently pull the printer out so that the exit port is slightly higher than the instrument panel, but the distance cannot be dragged too far. The new paper port section Cut into a pointed shape, insert the printer's feed port, open the instrument power switch, press the print button, make the paper from the printer's top out of a distance, insert the panel outlet slot to export. Cover the printer panel and load it.
6, the instrument does not have any user-serviceable parts, such as failure, please professional maintenance, or contact the supplier, do not open the instrument without permission, in order to avoid accidents or cause unnecessary losses.
7. The measurement range of the vacuum degree of the instrument is between 9.999×10-1 and 1×10-5, and the ion current measurement range is between 9.999×10-1 and 1×10-7. When the vacuum degree of the vacuum tube is greater than 10- The vacuum tube is recommended to be scrapped when the 2Pa or ion current is greater than 500uA.
8. If the pressure in the vacuum tube is equal to atmospheric pressure (ie, the vacuum tube is broken), the instrument will reject the test and return to the initial state within the measuring range of the instrument.
The use of vacuum tester should pay attention to what issues :
1, the instrument is a precision instrument, circuit board wiring density, generally require storage in a relatively dry place. If the environment is humid, you should always power on. 2. If the current value after the test shows zero, check the arc extinguishing chamber surface is clean. Because the surface is not clean, the change value of the leakage current may be greater than the ionization current value. In this way, the measured value minus the leakage is less than zero, and the instrument is judged as zero. After this happens, the surface of the arc extinguish chamber is cleaned and tested again. In general, the degree of vacuum obtained in this manner is more accurate.
3, when used, the high voltage output line must not touch the human body to prevent electric shock.
4. When the high-voltage indicator lights up, do not touch the high-voltage line and magnetron current line to prevent electric shock.
5, disassembly and printing paper in the case of the first power off the instrument, so as not to damage the printer. When changing paper, open the front panel, and use the index finger and thumb to pinch the two clips on both sides of the printer and gently pull the printer out so that the exit port is slightly higher than the instrument panel, but the distance cannot be dragged too far. The new paper port section Cut into a pointed shape, insert the printer's feed port, open the instrument power switch, press the print button, make the paper from the printer's top out of a distance, insert the panel outlet slot to export. Cover the printer panel and load it.
6, the instrument does not have any user-serviceable parts, such as failure, please professional maintenance, or contact the supplier, do not open the instrument without permission, in order to avoid accidents or cause unnecessary losses.
7. The measurement range of the vacuum degree of the instrument is between 9.999×10-1 and 1×10-5, and the ion current measurement range is between 9.999×10-1 and 1×10-7. When the vacuum degree of the vacuum tube is greater than 10- The vacuum tube is recommended to be scrapped when the 2Pa or ion current is greater than 500uA.
8. If the pressure in the vacuum tube is equal to atmospheric pressure (ie, the vacuum tube is broken), the instrument will reject the test and return to the initial state within the measuring range of the instrument.
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