Instruction Manual

<6. Maintenance>
6-1
IM 11B08A01-01E
6. Maintenance
Instrument modifi cation or part replacement must be conducted by the personnel of Yokogawa or
its assigned representative only. The contents of this chapter must be conducted by Yokogawa
service staff or a person with a proper training.
6.1 Maintenance and Inspection
6.1.1 Explosion-protection Structure
When performing maintenance, fi rst inspect the system according to the instructions given in
Table 6.1 before operating, in order for the explosionproof performance to be maintained.
If the following damages occurred, contact Yokogawa service center:
(1) Damage around the screws on the protection system (fl ameproof structure).
(2) Damage to any enclosure surface or transparent part.
(3) Any crack or excessive deformation to any of the gaskets.
Table 6.1 Maintenance and Inspection
Item Method Criterion Corrective Action
Enclosure Visual No damage Contact YOKOGAWA
Touch panel
surface
Visual No damage Contact YOKOGAWA
Setscrew Visual and by touch No looseness, dust or rust Retighten and clean, and
contact YOKOGAWA
Gaskets Visual No cracks or excessive deformation Contact YOKOGAWA
Cable inlet Visual and by touch No damage, deterioration or looseness Retighten or replace
Terminal Visual and by touch No looseness or dirt on insulators Retighten , parts change and
clean
6.1.2 Stopping the system
Unless in case of an emergency, stop the system according to “3.3.4 Stopping operation” and
then turn off the power.
6.1.3 Routine Inspection
The routine maintenance inspection must be done according to Table 6.2. In the inspection,
confi rm that all of the readings are consistent with the values indicated in the operation data.
These readings, if previously entered on the Operation Condition display menu, can also be
confi rmed on the screen as well.
Since these inspection items vary depending on the instrument specifi cations, select as required
according to the specifi cations.
2nd Edition : May 11, 2012-00
6