ABB LS4000 Operating Instructions Manual page 80

Checking O-rings and
gaskets
80
Test object Requirement
Cable glands  The cables in the cable glands on the transmitter unit
Potential equali- The following devices are connected via a ground cable to
zation the local potential equalization terminal:
 Transmitter unit
 Receiver unit
 Junction box
The O-rings and gaskets on the flanges are subject to normal wear; the level
of wear can vary heavily depending on the operating conditions (especially
measuring gas composition and measuring gas temperature). Therefore the
condition of the O-rings and gaskets should be checked annually.
Operating instruction LS4000 for NH
and receiver unit are fitted in a fixed position and can-
not move.
and H
3 2
O OI/LS4000/NH3/H2O-EN