Replacement And Troubleshooting; Dismantling And Reassembly; Safety Information For Dismantling And Reassembly - ABB 364G Series Manual

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Replacement and Troubleshooting

The display, secondary electronic, and transducer assemblies are not user-serviceable; however, they may

be replaced. This section describes the dismantle, the replacement and the troubl eshooting of these

assemblies. Other components are not replaceable except at the factory. As an example the housing covers

viewing glass. This because regulations do not p ermit field replacement of a broken or damaged glass as

this would in validate the enclosure's explosion proof rating. Therefore it is necessary to re place the ent ire

damaged enclosure cap assembly.

Dismantling and reassembly should not be carried out on site because of the risk of damage to components

and printed circuits as a result of a dverse environmental conditions such as humidity, dust, et c. The

dismantling and reassembly procedures given belo w should be carried out in the listed orde r to avoid

instrument damage. See the pictures at the end of the instructions for better understanding.

Operation required tools

3 mm Allen key (in the transmitter box)

Small Phillips screwdriver

Small flat-bladed screwdriver

Read the following Safety information before to start any operation.

Only specialist personnel or ABB may undertake dismantling and reassembly of certified devices.

Explosion-protected transmitters may only be repaired by the manufacturer or otherwise must be

Observe the relevant safety precautions before, during and after the repairs.

Process fluids and/or pressure retained in the transmitter primary unit can cause severe injury and death or

damage to the equipment. It is the user responsibility to make sure that no pressure is applied before

removing the instrument from service or when draining or venting.

For Hazardous classified Location installations, at least seven (7) threads on the cover must be engaged in

Before you begin read "Safety" on page 3.

approved by a certified expert after the repairs!

order to meet the flameproof (explosion-proof) requirements.

WARNING !

364Ax-Gx Instruction Manual

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364a series