Air Purging System - Siemens SITRANS LR560 Operating Instructions Manual

Aiming is not required
for signal optimization
with 78 GHz
frequency.
1) For 4" and 6" Aimer: Loosen the set screws in the locking ring.
Holding the electronics enclosure firmly, loosen the Aimer locking ring using the C
spanner supplied, until the LR560 drops down slightly. The enclosure can then be
turned freely.
Markings on the flange indicate minimum and maximum rotation (see
Display
on page 22).
2) Direct SITRANS LR560 so the antenna is pointed at an angle perpendicular to the
material surface, if possible.
3) When the desired position is reached, re-tighten the locking ring using the C
spanner, and tighten set screws.
4) For the 3" Aimer flange, tapered split washers with pressure rated versions are
provided to keep nuts and bolts perpendicular to the flange surface.

Air Purging System

For convenient cleaning, a purging inlet is provided above the antenna. The system pro-
vides an 1/8" inlet (female thread) above the antenna where clean, dry air passes to the
face of the antenna lens to clean it. The customer will supply the purging air by a manual
or automatic valve system.
Notes:
• Purge duration, pressure, and interval, will vary with each application. It is the user's
responsibility to determine the requirements depending on the application and
cleaning required.
• Short duration bursts of high pressure provide more effective cleaning than continu-
ous low pressure air.
• It is the customer's responsibility to ensure that any vacuum or pressure in the mea-
sured vessel is maintained, considering the hole that passes through the process
connection and SITRANS LR560 antenna system.
NOTE: Table continues on next page.
Air Pressure (psi)
20
40
Page 20 SITRANS LR560 (PROFIBUS PA) – OPERATING INSTRUCTIONS
Air Consumption (Flow rate versus applied pressure)
Aiming will assist in
measuring material
in the cone.
Approx. inlet volume flow rate SCFM
5
10
Aimer
Removable
a)
7ML19985LT01