LFY-715 Field of View Testing Device

Main purpose

Used for testing the visual effect of daily protective masks, face shields, gas masks, etc. Applicable to labor safety protection inspection centers, medical device and pharmaceutical inspection centers, disease prevention and control centers, textile testing centers, mask and face mask manufacturing enterprises, etc. 
Technical Indicators: 
1. Vision Measuring Instrument: Semi-circular Arc Bow: Radius 3000 + 40 mm. It can rotate around the horizontal radius passing through 0°. The arc bow is marked with scale lines (one scale line every 15°). 
2. Test head model: A standard head model with small light bulbs installed in the eye sockets. The position of the bulbs and the placement of the head model comply with the requirements of standard GB 2890. 3. Field of view area calculation: Using a dedicated software system, the computer automatically calculates: Field of view area; Unit of measurement: mm2. 
Applicable Standards 
GB/T 32610-2016 Technical Specification for Daily Protective Masks 6.12 
GB 2890-2022 Respiratory Protection Self-Contained Filtering Respirator for Toxic Gas Protection 6.8 
GB 2626-2019 Respiratory Protection - Self-Contained Filtering Respirators for Particulate Matter 
GB 21976.7-2012 Building Fire Escape and Refuge Equipment - Part 7: Filter-type Fire Self-rescue Respirators 
GB/T 16556-2007 Self-contained Open-Circuit Compressed Air Respirator 
GB 2891-1995 Performance Test Method for Filtering Gas Mask Face Mask 
XF 124-2013 Positive Pressure Firefighter Air Respirator