The medical mask combustion tester is a special test instrument for medical masks, which can test the flame retardant and combustible properties of medical masks to ensure the safety of the masks. It can measure the burning time of the mask surface, heat generation, heat emission, smoke concentration and other performance indicators.
The operation steps of the medical mask combustion tester are as follows:
1, Plug in the power socket on the back cover of the instrument and turn on the power supply. Twist the gas pressure reducing valve that comes with the instrument to the gas cylinder in a counter-clockwise direction and open the cylinder valve to turn on the gas source.
2, the combustion test chamber front door closed, and the "power" switch placed in the "open" position, the power indicator light.
3, first make the metal head mold nose tip part down, the mouthpiece with the metal head mold, press the "head mold start" button, the head mold began to rotate, when the head mold nose tip part just located in the igniter is above, press the "negative combustion stop" button, let the head mold stop rotating Adjust the height of the igniter head (lower the igniter head by rotating it clockwise, raise it by rotating it counterclockwise) so that the distance between the top of the igniter and the tip of the nose of the head is 20±2mm;
4, Press the "igniter return" button to return the burner to the ignition position.
5, Press the "Head return" button to return the head to the starting position. Press the "Clear" button to return the instrument to its initial state.
6, Press and hold the "Ignition" button and adjust the "Pressure Adjustment" knob on the panel (first pull it up gently outwards, then follow the instructions on the end of the knob to turn it in the "+" direction to increase, and in the "-" direction to increase. Then turn the knob in the "+" direction to increase and in the "-" direction to decrease), so that the pressure gauge pointer on the top of the apparatus box points at 20 Kpa, then press the knob to lock the pressure. (factory has been adjusted)
7, at this time the ignition resistance wire has turned red, to ignite the igniter and then release the "ignition" button. When ignition is difficult, please adjust the "flame" adjustment button, clockwise direction to reduce the flow of combustible gas, counterclockwise direction to increase the flow of combustible gas.
8, Open the front door of the combustion test chamber, place the flame height ruler (40mm high) in front of the flame by hand, turn the "flame adjustment" knob, adjust the flame height to 40mm±2mm, wait for the flame to stabilize, remove the flame height ruler, at this time, observe the "temperature display" on the instrument panel "whether stable at 800 ± 50 ℃, if not enough can be adjusted by increasing the inlet pressure of the gas cylinder pressure reducing valve, so that the flame temperature is stable at 800 ± 50 ℃.
9, Press the "igniter start" button, the igniter moves to the ignition position, press the "head die start" button, the head die starts to rotate, after the head die rotates into place, the igniter stops breathing and resets, "renewal of combustion time After the ignition is finished, press the "Ignition stop" button; if there is no ignition, press the "Ignition stop" button directly, wait for the end of the negative ignition, then press the "Ignition stop" button. "key, and record the renewal time and yin burning time.
10, press the "head die back" button to make the head die back to the starting position, open the front door of the combustion test box to remove the sample, the test is over.
11, press the "clear" button, the instrument is restored to the initial state, the next mask specimen with a metal head mold, then you can follow the steps of 6-11 for the next test. If the next test is not required, please turn off the power, unplug the power supply and take out the residue container to clean up the burning residue.
12, To test the flame resistance of the mask strap, put the mask on the metal head mould, loosen the "head mould positioning screw" and rotate the head mould so that the mask strap is downwards. Press the "head mould start" button and the head mould starts to rotate, when the head mould is just above the igniter, press the "ignition stop" button to stop the rotation of the head mould, adjust the height of the igniter head so that the distance between the top of the igniter and the head mould is 20±2mm. 2mm;
The above is QINSUN instrument for you to answer the detailed content of the medical mask combustion tester details, hope to help you.