Honeywell RM640, Handbook

Page: 35 / 184

INSTALLATION
3
35
RM640
www.honeywellprocess.com 34-VF-25-131 iss.1 GLO Feb 2019 US
If the antenna is smaller than the process connection (threaded):
• Make sure the tank connection is level.
• ISO 228-1 (G) connection:
ISO 228-1 (G) connection: ISO 228-1 (G) connection:
ISO 228-1 (G) connection: Make sure that you use the applicable gasket for the connection
dimensions and the process.
• ISO 228-1 (G) connection:
ISO 228-1 (G) connection: ISO 228-1 (G) connection:
ISO 228-1 (G) connection: Align the gasket correctly.
• NPT connection:
NPT connection: NPT connection:
NPT connection: Wind the thread seal tape around the process connection in agreement with
good engineering practice.
• Put the device carefully on the silo process connection.
• Turn the threaded connection on the antenna to attach the device to the process connection.
• Make sure that you point the device in the correct direction. For more data, refer to
General
notes
on page 28 ("Point the device in the correct direction")..
• Tighten the connection to the correct torque (not more than 40 N · m / 29.5 lbf · ft).
i End of the procedure.
Special equipment needed:
• 3 mm Allen wrench (not supplied)
WARNING!
Do not tighten the process connection to a torque more than 40 N · m / 29.5 lbf · ft. If the
connection is too tight, this will damage the thread.
To prevent damage to the antenna, make sure that the minimum diameter of the hole for a
1
½ NPT thread connection is not less than 43.4 mm / 1.71 ¨ .
If the antenna is larger than the process connection (threaded)
Figure 3-13: How to attach the device if the antenna is larger than the process connection
WARNING!
If you attach the antenna in a closed space, make sure that there is a good airflow in the area.
Make sure that a person not in the silo can always hear you.
INFORMATION!
If the antenna is larger than the process connection, we recommend that you use an antenna
extension. It is possible that there is not sufficient space to tighten the antenna locking screw.