Fault repair of Omron blood pressure monitor

1. Mercury leakage

1. The cause of mercury leakage failure

Under normal circumstances, the sphygmomanometer will often leak mercury, which may eventually cause a certain error in the measurement value of the sphygmomanometer device. Then the fault is generally manifested in the switch of the sphygmomanometer device is opened, the mercury column in the tube does not reach the level of the zero scale line, and there are bubbling and broken columns in the process of pressurizing the sphygmomanometer device. In the process of verification of the sphygmomanometer device, if the mercury in the sphygmomanometer device reaches 38kpa, then the sphygmomanometer needs to be placed in a stationary state, and it needs to be observed for two minutes or more, and finally the cause of the mercury leakage can be understood, which is mainly caused by the failure of the components of the sphygmomanometer device, and there are also some human factors.

2. Mercury leakage fault maintenance

When there is mercury leakage at the lowest end of the glass tube of the sphygmomanometer device, it can be said that the sealing rubber gasket at the lower end has been aged, and the rubber pad should be replaced, if the elasticity of the upper pressure plate spring of the glass tube of the sphygmomanometer device itself is relatively weak, and the glass tube is relatively loose, so the internal spring needs to be replaced in time, so that the elastic force of the spring can be effectively increased. When there is mercury leakage in the gap between the switch of the mercury kettle, the screw device on the switch shaft and above should usually be tightened in time, and a certain amount of strong glue can be added around the switch shaft device. When the pressure reaches 38kpa, it needs to stay for about a minute, and if there is still mercury leakage in the gap between the switches, then it is necessary to replace the mercury bottle inside in time. When the pressure rises further to 38kPa, if the mercury column at the bottom of the sphygmomanometer device is broken, it can indicate that the internal mercury content has been obviously insufficient, and air will enter the glass tube, and effective depressurization measures need to be taken immediately, otherwise the internal mercury will emerge from the top position of the sphygmomanometer device.

Second, the sphygmomanometer cannot be inflated

1. The reason why the sphygmomanometer cannot be inflated

In the process of metrological verification, the sphygmomanometer device is easy to inflat, which is generally manifested in the fact that after the exhaust valve is closed, the pressure cannot really rise when the rubber ball is pressurized, or the pressure will rise significantly when the internal rubber ball is pinched, but the mercury column will drop immediately after letting go, which can show that the gas path of the sphygmomanometer device has leakage.

2. The sphygmomanometer cannot be inflated for fault analysis

The common strategy in the process of fault maintenance is to pressurize the sphygmomanometer device, fold and compress the rubber tube inside the mercury storage bottle to the rubber ball and the wall belt gas respectively, and then find out the specific leakage location according to the decline of mercury. The screw fastening type in the sphygmomanometer device can clearly see the rubber tube after it is opened, so after the ball is removed, the extraction type can also take out a section of rubber pipe in the exhaust valve, and then continue to rub it will see that there are cracks on both sides of the problem, and the debris in the internal cracks will be cleaned up in time, which can effectively make the air leakage fault of the sphygmomanometer device be completely solved.

Fault repair of Omron blood pressure monitor

　　3. The glass tube is not vertical

1. The reason why the glass tube is not vertical

If the glass tube in the sphygmomanometer does not show a vertical phenomenon, the error of the display value verified by the sphygmomanometer device will increase significantly with the gradual increase of its internal pressure, and the positive error value of the displayed value should be 38kpa.

2. The glass tube is not vertically maintained

The glass tube inside the sphygmomanometer device can be poured forward first, and then the spring plate screw in the housing can be further loosened, and the spring plate can be gradually moved forward, and then the screw on the spring plate of the blood pressure monitor device can be tightened. And you can also tilt the glass tube to the rear, really loosen the screw on the spring plate in the sphygmomanometer, move the spring to the back, and then tighten the screw effectively, if the material of the shell is made of aluminum alloy, then the screw should not be tightened too tightly.

Fourth, the measurement results have a large error

1. The reason for the large error of the measurement results

Under normal circumstances, the staff of the measurement and verification of the sphygmomanometer device have made mistakes or unreasonable operation methods in the process of operation. The common manifestation is that the switch of the sphygmomanometer device is not closed in time after the use of the device, and after the upper cover is completely closed, there will be a part of the mercury leaking to the outside of the upper end of the sphygmomanometer glass tube. Or if the switch is turned off without a certain degree of tilting, it may eventually lead to the part of the mercury column below the zero scale line being blocked from the mercury storage bottle, and it will be retained in the value of the glass tube, and the above-mentioned mercury leakage will occur after the lid is closed. In some cases, if the lid is opened at the next operation, the remaining mercury will not be returned to the zero mark in time, and this part of the mercury will flow out of the upper part of the glass tube. Usually, the mercury storage bottle holder and the shaft of the switch and other components are more prone to mercury leakage, and when the two parts do not form a good match, mercury spraying will be triggered in the process of pressurizing the sphygmomanometer.

2. The measurement result error is large and repaired

When the above-mentioned fault occurs, usually need to replace the above-mentioned two parts in time, and in the actual working process, there are some mercury supplementation means that are relatively convenient to operate, can use the needle of the syringe to inhale the scientific, appropriate amount of mercury liquid in the spare mercury, and then open the upper cover of the sphygmomanometer device and the mercury storage bottle, insert the small hole of the tablet position at the top of the glass tube into it with a needle, and slowly inject the mercury into it, and then use the sphygmomanometer device to vibrate gently, The mercury ejected from the mercury storage bottle is fused with the newly injected mercury liquid. The final amount of mercury injected should meet the basic standard of zero error, and a smaller-diameter needle device should be used as much as possible, so that it is easier to prevent the filter from being damaged by the outside world.

Fault repair of Omron blood pressure monitor

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