1. When the liquid turbine flowmeter detects the filter capacitor in the power supply, the positive and negative electrodes of the electrolytic capacitor should be short-circuited first, and the lead can be used instead of the lead to discharge the capacitor when it is short-circuited, because it is easy to blow the core wire. It is possible to take a 220V, 60 to 100W lamp with a cap lead, which is connected to both ends of the capacitor. The lamp will flash at the moment of discharge.
2. When using the multimeter's ohmic block, remember that it cannot be charged. When using logic pens and oscilloscopes to detect signals, be careful not to make probes contact both measurement pins at the same time. The essence of this situation is to form a short circuit when the power is applied. When troubleshooting a meter in a wet environment, it is necessary to measure whether the various points on the printed circuit are unobstructed. The main fault in this case is the corrosion of the copper foil.
3. When the internal flowmeter of the turbine flowmeter of the liquid sample is repaired, if the contacts and the circuit board of the mounting component are coated with insulating varnish, the parameters of each point can be measured by using ordinary hand-stitched needles on the test leads of the multimeter so as to pierce the paint layer. Measure the points directly without stripping the paint layer in large areas. It is not possible to hot plug various control boards and plugs. Because of the power-on condition, plugging the control board will generate a strong induced electromotive force. At this moment, the instantaneous counter-attack voltage is very high, and it is easy to damage the corresponding control board and plug.
4, when the maintenance can not be blindly chaotic knock, so as not to expand the failure, the more repair and more bad. When disassembling and adjusting the instrument, record the original position for recovery. When the liquid turbine flowmeter repairs precision instruments and meters, if you accidentally fly a small part, you should first determine where it may fly, and do not look east or west. You can use magnet scanning and line-of-sight scanning methods to find out.
According to the direction of the force, the hydraulic machine has two types: vertical and horizontal. Most hydraulic presses are vertical, hydraulic presses for extrusion
Then use the horizontal type. According to the structure type, the hydraulic machine has two columns, four columns, eight columns, welded frame and multi-layer steel strip winding frame, and the medium and small vertical hydraulic machines are also C-frame type. The C-frame hydraulic press has three sides open for easy operation but poor rigidity. The welded frame hydraulic press for stamping has good rigidity and is open at the front and rear, but closed at the left and right. In the vertical four-column free forging hydraulic machine of the upper transmission, the cylinder is fixed in the upper beam, the plunger is rigidly connected with the movable beam, and the movable beam is guided by the column, and moves up and down under the pressure of the working fluid. There is a workbench on the beam that can move back and forth. An anvil and an anvil are respectively installed under the movable beam and on the work surface. The working force is supported by a frame composed of upper and lower beams and columns. Large and medium-sized free forging presses driven by pump-accumulators often use three working cylinders to achieve three-stage working force. A balance cylinder and a return cylinder that exert an upward force are also provided outside the cylinder.
Pipe Straightening Machine,C Frame Pipe Straightening Machine,Pipe Straightening Hydraulic Press 400 Ton,Pipe Straightening Hydraulic Press 800 Ton
CHENGDU ZHENGXI HYDRAULIC EQUIPMENT MANUFACTURING CO., LTD. , http://www.zxhydraulic.com