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8024252/AE00/V1-0/2020-07| SICK
O P E R A T I N G I N S T R U C T I O N S | ZIRKOR200 Ex-D
Subject to change without notice
MAINTENANCE
8
8
Maintenance
8.1
Technical knowledge necessary for maintenance work
8.2
Safety instructions for maintenance work
Note: Malfunction hazard
Only technicians with special ZIRKOR200 Ex-D training are allowed to perform
maintenance tasks on the ZIRKOR200 Ex-D.
DANGER: Danger of explosion due to damaged probe tube
A cold probe can be damaged by condensed, corrosive flue gas, as a result of which the
probe is no longer encapsulated in a flameproof enclosure and can lead to explosions.
▸
The probe must be in operation while in the process.
DANGER: Danger of explosions through hot surfaces
The probe can be heated by the process. When withdrawn from the process, the
temperature of the probe may be higher than the surface temperature certified for the
environment (see Ex-marking) and lead to an explosion.
▸
Only remove the hot probe from the duct in an Ex-free environment.
WARNING: Hot surface
The probe is heated by the process and may cause burns during and after removal from
the duct.
▸
Wear suitable protective clothing.
▸
Perform work on the probe after it has cooled down.
DANGER: Hazard by voltage
There is a risk of electric shock when working on the device with the power supply
switched on.
▸
Only carry out maintenance work when the device is disconnected form the power
supply.
▸
The power supply may only be switched on again after work completion or for test
purposes by the persons carrying out the work under consideration of the valid safety
regulations.
WARNING: Risk of chemical burns/poisoning through caustic/toxic residues
on components with sample gas contact
After the device has been decommissioned or removed from the measuring channel,
process gas residues can exist as deposits on components with sample gas contact
(e.g., gas filter, gas-carrying lines etc.). These residues can be odorless or invisible
depending on the gas mixture in the duct. Without protective clothing, contact with such
contaminated components can lead to severe burns or poisoning.
▸
Take appropriate protective measures for work (e.g., by wearing a safety mask,
protective gloves and acid resistant clothes).
▸
In case of contact with the skin or eyes, rinse the affected parts immediately with
clear water and consult a doctor
▸
Decontaminate all contaminated components according to regulations after
disassembly.