9
Maintenance
9.1
Safety
Ex safety
WARNING
Risk of explosion
Some of the work described in this Chapter assumes an Ex free zone.
b
Wait 20 minutes after switching off the main power supply before opening the
enclosure.
DANGER
Risk of explosion through incorrect performance of maintenance work
Incorrect performance of maintenance work in potentially explosive atmospheres can
cause serious injuries to people and damage during operation.
•
Maintenance and commissioning tasks as well as checks should only be carried
out by experienced/trained personnel with knowledge of the rules and regulations
for potentially explosive atmospheres, especially:
–
Ignition protection types
–
Installation procedures
–
Zone classification
•
Standards to be applied:
–
IEC 60079‑14, Annex F: Knowledge, expertise and competence of responsi‐
ble persons, craftsmen and designers
–
IEC 60079-17: Electrical installations inspection and maintenance
–
IEC 60079-19: Equipment repair, overhaul and reclamation
DANGER
Risk of explosion when using spare and wearing parts not approved for the Ex zone
All spare parts and expendable parts for the in-situ gas measuring device have been
checked by SICK for ATEX suitability. The use of different spare parts and expendable
parts increases the risk of an explosion and the ignition protection can no longer be
ensured.
b
Use only original spare parts and expendable parts from SICK.
DANGER
Risk of explosion through residual voltages and hot surfaces in the device
When the device is switched off, residual voltages and hot surfaces represent an
increased risk of explosion when the device is open.
b
Wait 20 minutes after switching off the main power supply before opening the
enclosure.
MAINTENANCE
9
8019532/100Q/V1-1/2018-08 | SICK
O P E R A T I N G I N S T R U C T I O N S | GM700 Ex
67
Subject to change without notice