Operating Instructions

Table Of Contents
4.3.9 Aluminum horn with polypropylene lens (dust cover) antenna version
The polypropylene lens acting as a dust cover fits onto the end of the horn and prevents the
buildup of dust and other process material inside the horn. It is particularly useful for
applications in areas of high humidity, or with bulk solids with a high moisture content.
Aluminum horn antenna O-ring
8xM5 screws Universal aimer adaptor
O-ring Universal aimer flange
Polypropylene lens (dust cover)
Installation
1. Disassemble the aimer flange assembly from the device by unscrewing the large M90
thread.
2. Remove the aimer adaptor by unscrewing the 8xM5 screws from the horn
assembly. Discard the removed aimer adaptor and screws.
3. Thoroughly clean the internal threads on the aimer flange assembly using a soft bristle
brush.
4. Thoroughly clean the mating surfaces of the flange, horn and the aimer flange
assembly.
5. Apply the Molykote 111 grease from the provided polybag on both o-rings provided in the
kit to aid assembly.
6. Install one of the two o-rings provide using the kit on the groove at the top of the lens.
7. Seat the second o-ring (provided in the kit) in the groove inside the aimer adaptor.
Installing/mounting
4.3 Proper mounting
SITRANS LR260 with mA/HART
Operating Instructions, 11/2019, A5E32337683-AD 35