How to test the micro regulator-ISO8536-13
Part 1 Preparation
Balance, accurate to 0.01g
6 of 0.9% sodium chloride liquid bags, 600ml
6 liquid storage devices, which can be covered with plastic wrap to prevent liquid evaporation
Barometer with air source
6 sets Gravity infusion set with micro regulator
Part 2 Leak Test
2.1 Open test leak
Set the flow regulator to the "Open" position, connect one end of the infusion set with compressed air, and close the other end, immerse it in (40±1)℃ water, set the air pressure greater than 50Kpa for 15s, check whether there is air bubbles, and reach the maximum Repeat the test on the scale value 25%, 50%, 75% closest to the digital scale.
If the maximum scale is 250ml, rotate to fine-tune to 60ml, 125ml, 200ml to test for leakage
If the maximum scale is 300ml, rotate and fine-tune to 80ml, 150ml, 250ml to test for leakage
2.2 Test leakage at OFF
Set the flow regulator to the "OFF" position, connect one end of the infusion set with compressed air, and close the other end, immerse it in (40±1)℃ water, apply pressure greater than 50Kpa for 15s, and observe whether the lower end of the micro regulator is open If there is air bubbles, close the open end of the pipeline and keep the air pressure higher than 50Kpa for 15s. Check whether there is any air leakage from the flow regulator.
In the process of turning the fine-tuning to OFF, you can test whether the fine-tuning rotation is smooth.
Part 3 Indication error
3.1 Ensure that the experimental temperature is 23±2℃, and flow smoothly for 2 hours under a static pressure of 1 meter
3.2 Take 3 infusion sets to connect to the liquid bag respectively, set the flow regulator to three levels of high, medium and low, such as 125ml, 80ml and 20ml. After 1H, weigh and calculate the liquid volume in the beaker.
Part 4 Flow Stability
4.1 Choose 3 infusion sets, choose 20ml, 80ml, 125ml three scales respectively,
4.2 Under the same 1M static pressure head, keep the infusion set free of flow for at least 15 minutes before starting the test, and continue the test for 6 hours. Use the weighing method to calculate the liquid volume per hour.