Siemens HydroRanger 200 HMI Operating Instructions Manual page 279

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
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 295) or on the warning sign
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.
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 295) or on the device before
HydroRanger 200 HMI
Operating Instructions, 06/2018, A5E36281317-AC
CAUTION
precautionary measures. Have maintenance work carried out by qualified personnel.
WARNING
before opening the device.
CAUTION
starting with maintenance work.
Service and maintenance
9.2 Basic safety notes
277