3BHB004744R0010模块,XVC517AE10使用书
孔口限制视野（目标区域），减少并保持空气流量，保持空气阻塞和增加火焰和背景辐射之间的区分。节流孔固定在带有节流孔固定器的旋转支架。孔板也可以放置在一英寸的活接头（未提供）内，或35-318-X安装法兰内。
理想情况下，扫描仪应能看到4到25平方英寸（25-150 cm2）的目标区域)火焰锋面。
火焰前锋是燃烧空间内的一个平面，将未燃烧的燃料区域与正在燃烧燃油。
XVC517AE10 3BHB004744R0010模块注：辨别力和敏感性之间存在反比关系。
隔热短节
隔热短节零件号35-127-3（BSP）或35-127-1（NPT）可防止热空气的热量传递扫描头的观察管。
石英窗密封联轴器
当扫描仪管道需要联轴器或密封时，使用密封联轴器（P/N 60-1199-x）。
尺寸为1英寸美国标准锥管螺纹（1“NPT）。密封联轴器有一个石英窗口，用于将扫描仪与炉膛压力和热量隔离。使用密封联轴器时，1“三通/
Y形三通用于净化空气进口。确保石英窗正确就位，以密封扫描仪。做
不要过度拧紧连接环，因为可能会损坏车窗。为获得最佳效果，请手动拧紧联轴器套环。
Orifices (see Fig. 12)
The orifice restricts the field of view (target area), reduces and maintains air flow, maintains air block and
increases discrimination between flame and background radiation. The orifice is secured within the ball of
a swivel mount with an orifice retainer. The orifice can also be placed within a one inch union (not pro
vided), or within the 35-318-X mounting flange.
The scanner should ideally sight a target area of 4 to 25 square inches (25-150 cm2 ) of the flame front.
The flame front is a plane within the combustion space separating the region of unburned fuel from the
burning fuel.
Note: There is an inverse relationship between discrimination and sensitivity.
Heat Insulating Nipple
The heat insulating nipple P/N 35-127-3 (BSP) or 35-127-1 (NPT) prevents heat transfer from the hot
sight pipe to the scanner head.
Sealing Coupling with Quartz Window
The sealing coupling (P/N 60-1199-x) is used whenever a coupling or seal is required for scanner piping.
The size is one inch US standard taper pipe thread (1" NPT). The sealing coupling has a quartz window to
block off the scanner from the furnace pressure and heat. When the sealing coupling is used, the 1" tee/
wye is used for the purge air inlet. Be sure the quartz window is properly seated to seal off the scanner. Do
not overtighten coupling collar because damage to the window may result. For best results, hand tighten
coupling collar.
