The main purpose
It is used to test the visual field effect of daily protective masks, face masks, gas masks, etc. It is applicable to labor safety protection inspection center, medical device and drug inspection center, disease prevention and control center, textile inspection center, mask and mask manufacturing enterprises, etc.
Technical index
1. Perimeter: semi-circular arc bow: radius 300040 mm, can be rotated around a horizontal radius passing through 0 °, and the arc bow is marked with a scale line (one scale every 15 °);
2. Test head mold: a standard head mold with small bulbs in the two eyelets of the head mold. The position of the bulb and the placement of the head mold are in accordance with the requirements of the standard GB 2890.
3. Calculation of field of view area:
Using a special software system, the computer automatically calculates: field of view area; measurement unit: mm2.
Applicable standards
GB/T 32610-2016 Technical specification for daily protective mask 6.12
GB 2890-2022 Respiratory protection Self-priming filter gas mask 6.8
GB 2626-2019 Respiratory protection-Non-powered air-purifying particle respirator
GB 21976.7-2012 Building fire escape refuge equipment Part 7: Filter type fire self-rescue breathing apparatus

GB/T 16556-2007 Self-contained open-circuit compressed air breathing apparatus

GB 2891-1995 Performance test methods for facepiece of filter type respirator

XF 124-2013 Self-contained positive pressure air breathing apparatus for fire-fighting