Matters needing attention when the radar level gauge is overhauled

What should I pay attention to when repairing the radar level gauge? 1. Use a multimeter to detect the radar level meter on site, and remember not to measure it with electricity. The output current of the radar level gauge is 22mA2. When using a logic pen, an oscilloscope, etc. to detect the radar level gauge signal, be careful not to make the probe touch the two measurement pins at the same time, which will cause a short circuit when powered on. 3. When detecting the filter capacitor in the power supply, the positive and negative electrodes of the electrolytic capacitor should be short-circuited first, and the test lead wire should not be used instead of the wire to discharge the capacitor when short-circuiting, because it is easy to burn the core wire. You can take a 220V, 60-100W lamp with a lamp head lead and connect it to both ends of the capacitor, the bulb will flash at the moment of discharge. 4. When repairing the fault of the radar level gauge in a humid environment, it is necessary to use a multimeter to test whether the points of the printed circuit are unobstructed, because the main fault in this case is copper foil corrosion. 5. When overhauling the internal circuit of the radar level gauge, if the contact points of the installation components and the circuit board are coated with insulating varnish, when measuring the parameters of each point, you can use an ordinary hand-stitched needle to weld on the test pen of the multimeter, so as to pierce the paint layer and directly measure each point. point without stripping the paint over a large area. 6. Do not plug and unplug various control boards and plugs with electricity. Because in the case of power-on, plugging and unplugging the control board will generate a strong induced electromotive force. At this time, the instantaneous counterattack voltage is very high, and it is easy to damage the corresponding control board and plug. 7. Do not blindly knock or touch the radar level timer when overhauling it, so as not to expand the fault, and the more it is repaired, the worse it will be. 8. The radar level gauge needs to be disassembled on site, or the original position or original parameters need to be recorded when adjusting the parameters inside, so as to restore the original state. 9. The radar level gauge generally has the function of restoring the factory settings, which can be restored to the factory settings during maintenance.

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