PROline Promag 53 4 Wiring
Endress+Hauser 57
4.3.2 Special cases
Metal, ungrounded piping
In order to prevent outside influences on measurement, it is advisable to use ground
cables to connect each sensor flange to its corresponding pipe flange and ground the
flanges. Connect the transmitter or sensor connection housing, as applicable, to ground
potential by means of the ground terminal provided for the purpose (Fig. 37).
!
Note:
The ground cable for flange-to-flange connections can be ordered separately as an
accessory from E+H (see Page 97):
• Pipe size ≤ 12" / DN ≤ 300: The ground cable is in direct connection with the conduc-
tive flange coating and is secured by the flange screws.
• Pipe size ≤ 14" / DN ≥ 350: The ground cable connects directly to the metal transport
bracket.
Fig. 37: Potential equalization with equalizing currents in metallic, non-grounded piping systems
F06-5xxxxxxx-04-xx-xx-xx-003
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