Operating Instructions

Table Of Contents
The dust cap 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.
Three sizes are available, to fit the standard 2", 3" and 4" horns.
Installation
1. Thoroughly clean inside the horn. If you remove the horn for easier cleaning, take care not
to damage or bend the plastic emitter.
2. Press the cap firmly onto the horn until the ridge inside the cap snaps into position in the
groove on the outside of the horn.
3. Hand tighten the adjustable clamp supplied to secure the cap.
4. Use a screwdriver or nut driver to tighten the clamp screw until the clamp provides an air-
tight seal.
Note
It is critical to ensure no moisture can be trapped inside.
Groove
Plastic emitter
Ridge
Dust cap
Clamp screw
Installing/mounting
4.3 Proper mounting
SITRANS LR260 with mA/HART
34 Operating Instructions, 11/2019, A5E32337683-AD