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8024250/18HT/V2-0/2020-12| SICK
O P E R A T I N G I N S T R U C T I O N S | ZIRKOR200 Ex-G
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-G training are allowed to perform
maintenance tasks on the ZIRKOR200 Ex-G.
DANGER: Danger of explosion due to damaged measuring probe
A cold measuring probe can be damaged by condensed, corrosive flue gas, as a result of
which the analyzer unit is no longer encapsulated in a flameproof enclosure and can
lead to explosions.
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The analyzer unit must be in operation while in the process.
DANGER: Danger of explosion through hot surfaces
The measuring probe can be heated by the process. When withdrawn from the process,
the temperature of the measuring probe may be higher than the surface temperature
certified for the environment (see Ex-marking) and can lead to an explosion.
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Only remove hot measuring probe from the duct in an Ex-free environment.
WARNING: Hot surface
The measuring probe is heated by the process and may cause burns during and after
removal from the duct.
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Wear suitable protective clothing.
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Perform work on the analyzer unit after it has cooled down.
DANGER: Hazard by voltage
There is a risk of electric shock when working on the device with the voltage supply
switched on.
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Only carry out maintenance work when the device is disconnected form the power
supply.
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The voltage 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.
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Take appropriate protective measures for work (e.g., by wearing a safety mask,
protective gloves and acid resistant clothes).
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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.
