I. Scope of application:
      It is used to measure the inspiratory resistance and expiratory resistance of respirators and masks under the specified conditions. Applicable to the national labor protection supplies inspection agency, mask manufacturers related inspection and inspection of ordinary masks, dust masks, medical masks, anti-fog mask products. It is mainly used to test the inhalation and exhalation resistance of masks and respirators under specified conditions. Suitable for masks and respirators manufacturers, quality supervision, scientific research, wearing and other units.
Relevant standards:
      GB 2626-2006, YY 0969-2013, GB2626-2006, GB19083-2006, GB / T 32610-2016, NIOSH 42 CFR Part 84, EN 149-2001.
Technical parameters:
* Exhaust range: 0L / min ~ 500L / min
* Ventilation volume is constant: (85 ± 1) L / min
* Sensor range: 0-1000Pa
* Accuracy: ± 1Pa
* Flow adjustment: data feedback dynamic adjustment
* Data processing capacity: ≤1000 tests
* Data output: high-definition touch screen display; micro printer
* Power supply: AC 220V ± 10V 50Hz
Fourth, the functional characteristics:
1. PLC touch screen operation.
2. Two modes of breath detection and inhalation detection can be selected by themselves.
3. The micromanometer sensor uses a two-wire system, with high accuracy and good stability.
4. The range and zero point of the micromanometer sensor are continuously adjustable, the damping is adjustable, there is no mechanical moving part, and the maintenance workload is small.
5. Display the test pressure in real time.
6, real-time display of the amount of breathing gas tested.
7. Configure a special test head mold.
8. The flow sensor is a digital flow meter with high sensitivity. The chip uses a thermal mass flow meter without temperature and pressure compensation.