Medical mask differential pressure tester troubleshooting methods

Medical mask differential pressure tester is an instrument used to test the air permeability (pressure difference) of medical masks. When the sample is mounted on a fixed cross-sectional area channel (fixture) and the vacuum pump is activated, the airflow at a specific flow rate will produce a certain pressure difference between the upper and lower sides of the test sample to calculate the mask's air permeability. Built-in precision pump, flow sensor, differential pressure sensor, single-chip computer control, precise control of flow rate and differential pressure measurement.

Medical mask differential pressure tester functional advantages:

This device has the function of double-point correction of measurement data, which can ensure the accuracy of measurement data.

In the process of pressure test, even if there is no leakage, the pressure will change with the change of temperature. The device converts the pressure according to the ideal gas equation through the auxiliary temperature measurement point, so that the pressure data read is the same as the temperature state at the beginning of the test. It makes the test results more scientific and reliable.

The device grants history reading software, which can read the history data recorded in PLC into PC via Ethernet and automatically generate reports to print into PDF format electronic documents.

Medical mask differential pressure tester troubleshooting methods:

The tooth meshing surface and the corner of the mating shaft hole are severely worn.

Causes a large and unstable value error and the phenomenon of a stuck needle. This damage is mainly due to the pressure gauge in a fixed unstable load caused by prolonged use (such as power air compressor), so the pressure transfer process has a large compensation or burr obstruction and make the measurement value exceeds the poor: Exclusion method: replace the new accessories; take the shrinkage hole repair, the damaged tooth mesh can be adjusted to avoid damage to the tooth surface to continue to use.

The pointer does not return to zero:

If the pressure is unloaded after the boost, the pointer does not return to zero, indicating that the zero state of this table increases the force of the direction of the reply force. This force comes from frictional resistance or deformation of the remaining tension. Frictional resistance mainly occurs in the swim wire rod, hinge engagement parts, if the swim wire sticky ring or stranded chaos, rod hinge activity is not working, engagement parts have burrs, will make the frictional force increased sharply, so that the pointer back to zero, so these parts to restore the normal state can be ruled out not to return to zero phenomenon.