Siemens Sitrans LR250, Руководство по эксплуатации, Страница: 37 / 306

Installing/mounting
4.4 Installation instructions
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 08/2014, A5E32221386-AC
35
WARNING
Pressure applications
Danger of injury or poisoning.
It will be necessary to use PTFE tape or other appropriate thread sealing compound, and to
tighten the process connection beyond hand-tight. (The maximum recommended torque for
Threaded versions is 40 N-m (30 ft.lbs.) See Flanged versions (Page 36) for FEA
recommended torque values.)
Note
• On devices with a removable head, there is no limit to the number of times a device can
be rotated without damage.
•
When mounting, orient the front or back of the device towards the closest vessel wall or
obstruction.
• Do not rotate the enclosure after programming and vessel calibration, otherwise an error
may occur, caused by a polarity shift of the transmit pulse.
4.4.1 Threaded versions
WARNING
Pressure applications
Danger of injury or poisoning.
It may be necessary to use PTFE tape or other appropriate thread sealing compound, and
to tighten the process connection beyond hand-tight. (The maximum recommended torque
for Threaded versions is 40 N-m (30 ft.lbs.)
1. Before inserting the device into its mounting connection, check to ensure the threads are
matching, to avoid damaging them.
2. Simply screw the device into the process connection, and hand tighten, or use a wrench.