6
Maintenance
6.1
Opening the lid (cover)
Before opening the lid for maintenance reasons, consider the following:
•
Check the certifications on the product label and then review
.
•
•
Ensure that no dust deposits or airborne dusts are present.
•
Ensure that rain does not enter the housing.
Table 6-1: Check Before Opening Lid
Protection
Safety information
No protection
Do not remove the lid while circuits are alive.
Flameproof or gas
explosion-proof (type D
housing)
To prevent ignition of hazardous atmospheres, do not
remove the lid while circuits are alive.
Dust explosion-proof
To prevent dust explosions, do not remove the lid while
circuits are alive.
Intrinsic safety
If NAMUR electronics is fitted, the lid can be removed
while circuits are alive.
6.2
Regular checks for safety
To ensure robust safety in hazardous locations and with electrical safety, the
following items must be regularly checked depending on the application:
•
Mechanical damage or corrosion of the field wiring cables or any other
components (housing side and sensor side).
•
Tight sealing of the process connection, cable glands, and enclosure lid.
•
Properly connected external PE cable (if present).
6.3
Cleaning
If cleaning is required by the application, following must be observed:
•
Cleaning agent must comply with the materials of the unit (chemical
resistance). Mainly the shaft sealing, lid sealing, cable gland and the
surface of the unit must be considered.
The cleaning process must be done in a way, that:
•
The cleaning agent cannot enter into the unit through the shaft sealing,
lid sealing or cable gland.
October 2020
Quick Start Guide
Quick Start Guide
33
