Endress+Hauser Promag 53 - Page 39

Promag 53 PROFIBUS-DP/-PA 3 Installation
Endress+Hauser 39
Welding the sensor into the piping (weld nipple)
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Caution:
Risk of destroying the measuring electronics. Make sure that the welding machine is not
grounded via the sensor or the transmitter.
1. Tack-weld the Promag H sensor into the pipe. A suitable welding jig can be ordered
separately from E+H as an accessory (see Page 111).
2. Remove the threaded fasteners from the process-connection flange. Remove the
sensor complete with seal from the pipe.
3. Weld the process connection into the pipe.
4. Reinstall the sensor in the pipe. Make sure that everything is clean and that the seal
is correctly seated.
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Note:
• If thin-walled foodstuffs pipes are not welded correctly, the heat could damage the
installed seal. It is therefore advisable to remove the sensor and the seal prior to
welding.
• The pipe has to be spread approximately 8 mm to permit disassembly.
Cleaning with pigs
If pigs are used for cleaning, it is essential to take the inside diameters of measuring
tube and process connection into account (see Page 161 ff.).