High Voltage Switch Dynamic Characteristics Tester
1. Close/Open Time: The time interval from the instant the close (open) command is received to the instant when all pole contacts touch (separate). 2. Close/Open Synchronism: The maximum time difference among the instants when contacts of each break touch (separate). 3. Bounce Time: The time from the first contact (separation) to the final stable contact (separation) of the moving and stationary contacts during the close (open) operation. 4. Operating Time: (Contact Operating Time) The time from the instant the close (open) command is received to the instant when the contacts just start to move. 5. Bounce Count: The number of separations (contacts) of the moving and stationary contacts during the open (close) operation. 6. Bounce Amplitude: The maximum rebound value of the moving contact during its movement. 7. Travel: The distance from the initial position to any position of the moving contact during the open/close operation. 8. Open Gap: The total gap between the contacts of one pole or any connected conductive parts when in the open position. 9. Over-travel: The distance the moving contact continues to move after the contacts touch during the close operation. 10. Excess Travel: The difference between the maximum travel and the stable travel of the moving contact during the open/close operation. 11. Just-close (open) Speed: The speed of the moving contact at the instant of touching (separating) with the stationary contact during the close (open) operation. 12. Average Speed: The ratio of the travel to the time of the moving contact during the entire movement in the close (open) operation. 13. Arcing Time: In a close-open operation, the time interval from the instant when all pole contacts touch to the instant when the arcing contacts of all poles separate during the subsequent open operation.
（1） A-type panel: Please pinch the elastic clips on both sides of the printer frame with your fingers, push the entire printer into the mounting hole of the instrument or equipment panel, and check whether the printer is installed firmly. （2） D-type and F-type front paper-loading panel: Installation is extremely simple and convenient. Insert the entire printer into the mounting hole of the instrument or equipment panel, clamp the printer from behind the equipment panel with plastic clips and tighten the screws. ◆General paper loading process is as follows ① Remove the front cover of the printer ② A-type panel micro printer must be removed from the instrument panel. Note: The micro printer power must be turned off before operation. D-type, F-type front paper-loading panel and T-type desktop can skip this step. ③ Remove the paper roll shaft, install a new paper roll, place the paper shaft back into the guide slot of the printer, and ensure the paper roll shaft is firmly installed and will not fall out. ④ Cut the paper end into a triangle or trim it evenly. ⑤ Turn on the printer power. After the printer advances a line, press the SEL key to turn off the SEL indicator, then press the LF key to rotate the print head. Manually feed the paper head into the paper inlet below the print head, and the paper will slowly enter the print head until it comes out from the front of the print head. Then press the LF or SEL key to stop the print head rotation → close the printer cover and thread the paper out through the paper outlet of the front cover. ◆Replacing the ribbon cartridge Ribbon replacement is only for dot matrix printers. Thermal printers only need special thermal paper and do not require ribbon replacement (consumables). Note: Thermal paper has two sides, and only the front side can be printed on. ◆The process of replacing the ribbon cartridge is as follows ① Open the printer front cover. ② First lift the right end of the ribbon cartridge, then lift the left end (the end with the knob), and the ribbon cartridge can be removed. ③ Gently place the left end of the new ribbon cartridge on the gear shaft of the print head, turn the knob on the ribbon cartridge in the direction of the arrow until the end of the ribbon cartridge falls to the bottom, then lower the right end of the ribbon cartridge. ④ Install the printer cover. First hang the upper part of the front cover on the frame, pay attention to aligning the indicator lights and buttons, then press the lower part of the front cover towards the frame with a little force to snap it onto the frame.
