User's Manual

DRAFT
Micropilot FMR56, FMR57
Endress+Hauser V. 1, Rev. 6, 19-10-2012 45
Integrated air purge connection for FMR57
In extremely dusty applications, the integrated air purge connection can prevent clogging of the antenna.
Pulsed operation is recommended.
1
A0016932
å 18
Micropilot FMR57 with air purge connection
1
Air purge connection NPT¼ or G¼
Torque for air purge connection: 6 Nm (4.4 lbf ft)
•
Pulsed operation
max. pressure of purge air: 6 bar (87 psi)
•
Permanent operation
recommended pressure range of the purge air: 200 to 500 mbar (3 to 7.25 psi)
Make sure to use dry purge air.
In general, air purging should only be used as much as necessary, since too much air purging may
cause mechanical damage.