Siemens SITRANS LR560 User Manual

Installing/mounting
4.2 Installation instructions
LR560 (PROFIBUS PA)
30 Operating Instructions, 06/2018, A5E34648471-AE
4.2.6
Air purging system
For convenient cleaning, a purging inlet is provided above the antenna. The system provides
a 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.
Note
Air Purging considerations
•
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 continuous
low pressure air.
•
Some dust particles are highly abrasive and can cause wear on the lens face over time if
continuous air purge is used, therefore short bursts are recommended.
•
It is the customer’s responsibility to ensure that any vacuum or pressure in the measured
vessel is maintained, considering the hole that passes through the process connection
and SITRANS LR560 antenna system.
Air Consumption (flow rate versus applied pressure)
Air pressure (psi)
Approx. inlet volume flow rate (SCFM)
20
5
40
10
50
15
80
20
100
25
110
30
Recommended 90 to 110 psi for effective cleaning
1)
1)
Air pressure in vessel can affect purge operation.

Siemens SITRANS LR560 Specifications

General

Brand	Siemens
Model	SITRANS LR560
Category	Transmitter
Language	English