Siemens MASS 2100 Operating Instructions Manual page 170

Service and maintenance
9.4 Maintenance and repair work
Humid environment
Risk of electric shock.
● Avoid working on the device when it is energized.
● If working on an energized device is necessary, ensure that the environment is dry.
● Make sure when carrying out cleaning and maintenance work that no moisture penetrates
Hot parts in the device
Temperatures that can burn unprotected skin may be present for some time after the device
has been switched off.
● Observe the waiting time specified in Technical data (Page 215) or on the device before
Enclosure open
Risk of explosion in hazardous areas as a result of hot components and/or charged capacitors
inside the device.
To open the device in a hazardous area:
1. Isolate the device from power.
2. Observe the wait time specified in Technical data (Page 215) or on the warning sign before
3. Visually inspect sensor inlet and outlet.
Exception: Devices exclusively having the type of protection "Intrinsic safety Ex i" may be
opened in an energized state in hazardous areas.
Hazardous voltage at open device
Risk of electric shock when the enclosure is opened or enclosure parts are removed.
● Before you open the enclosure or remove enclosure parts, de-energize the device.
● If maintenance measures in an energized state are necessary, observe the particular
170
WARNING
the inside of the device.
CAUTION
starting with maintenance work.
WARNING
opening the device.
CAUTION
precautionary measures. Have maintenance work carried out by qualified personnel.
MASS 2100 & FC300 (FCT030)
Operating Instructions, 06/2017, A5E39789040-AA