ABB LS4000 Operating Instructions Manual page 154

154
Checking the
electrical system
LS4000, LS4060 DIODE LASER ANALYZERS | OI/LS4000/O2-EN REV. A
Test object Requirement
Transmitter unit, The transmitter unit and receiver unit are in the following
receiver unit condition:
 The housings are not damaged
 The housing covers are closed and bolted
 All of the fixing screws are present.
The transmitter unit and receiver unit are installed so that
the following requirements are met:
 The housings do not come into contact with any over-
 The housings are not improperly heated by the heat
Test object Requirement
Cable condition All cables are undamaged.
Cable types All connections are made using the specified cable type.
Cable lengths For ATEX, IECEx and KCs variants: The cables of the
transmitter unit and receiver unit are at least 1.00 m long.
Shielded cables The shielded cables meet the following requirements:
 The cables are fed through metal cable glands
 The braided shield is properly connected to the cable
Supply voltage The supply voltage is consistent with the information on
the name plate of the junction box.
Connecting All connecting cables meet the following requirements:
cables
 The cables are properly installed and secured
 The cables in the junction box are connected using the
 The cables in the cable glands are sealed so that no
 All of the unused cable wire ends are insulated or
 If there is a danger of explosion due to dust, precau-
Cable glands  The cables in the cable glands of the transmitter unit
Potential equali- The following devices are connected via a ground cable to
zation terminal the local potential equalization terminal:
 Transmitter unit
 Receiver unit
 Junction box
pressure in the process gas path
generated at the contact point of the process gas path
(purging flange).
gland
correct terminal assignment.
dust can penetrate
grounded
tionary measures are taken to prevent the develop-
ment of static charges on the surface of cables and
lines.
and receiver unit are fitted in a fixed position and can-
not move