Installation
5.2 Aiming
An effective aiming technique is to adjust the head until the highest reading is observed on the internal display. When the highest reading is reached, hold the unit in place and secure the mounting base. Make sure that the sensor is in 1‐color mode when using this aiming technique!
Another aiming can be done by means of a battery powered aiming light. Simply loosen the compression sleeve holding the fiber optic cable, loosen the screw at the heater block, and pull the cable out of the heater block approximately 7 mm (0.25 in), see Figure 13, p. 17. Raise the fiber optic cable enough to slip the aiming light onto the end. Align the light beam on the target.
5.3 Fiber Optic Cable
Fiber optic cables and optical heads are able to withstand hot ambient temperatures up to 200°C (390°F), optional even up to 315°C (599°F). They can also operate in areas of high electromagnetic fields, which would render conventional instruments useless. The small optical head can be mounted in cramped locations. The fiber optic cable has a small bend radius (36 mm / 1.5 in minimum) and can be “snaked” around and through machinery, walls, and other obstacles. If the cable needs to be changed, it is field replaceable. A calibration program for replaced fiber cables is included with your sensor. Longer fiber optic cables allow the electronics enclosure to be well away from hostile environments.
The fiber optic cable is field replaceable, see section 10.4 Replacing the Fiber Optic Cable, p. 49. The fiber optic cable and head are one component. The cable can be disconnected from the electronics box for aiming or threading through conduit during installation. The cable is keyed and can only be inserted one way into the electronics enclosure.
The fiber optic cable is a sealed, stainless‐steel armor sheath covering the fiber optic bundle.
Bend Radius of Fiber Bundle: | 38 mm (1.5 in) minimum |
Cable Diameter: | 6.5 mm (0.25 in) |
Ambient Temperature: | 0 to 200°C (32°F to 392°F), optional up to 315°C (599°F) |
Environmental Rating: | Water tightness as per NEMA‐4 (IEC 529, IP 65) hose down test, rated |
| attached and with protective sleeves, which prevents liquid from |
| entering through the connectors. The given environmental rating is |
| not valid for the 315°C (599°F) cables! |
18 | Marathon Series FA/FR |
