Siemens SITRANS P Operating Instructions Manual page 183

No maintenance interval has been defined
Device failure, device damage, and risk of injury.
● Define a maintenance interval for recurring tests depending on the use of the device and
● The maintenance interval will vary from site to site depending on corrosion resistance.
Maintenance during continued operation in a hazardous area
There is a risk of explosion when carrying out repairs and maintenance on the device in a
hazardous area.
● Isolate the device from power.
- or -
● Ensure that the atmosphere is explosion-free (hot work permit).
Impermissible accessories and spare parts
Risk of explosion in areas subject to explosion hazard.
● Only use original accessories or original spare parts.
● Observe all relevant installation and safety instructions described in the instructions for the
Hot, toxic or corrosive process media
Risk of injury during maintenance work.
When working on the process connection, hot, toxic or corrosive process media could be
released.
● As long as the device is under pressure, do not loosen process connections and do not
● Before opening or removing the device ensure that process media cannot be released.
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC
WARNING
your own experience.
WARNING
WARNING
device or enclosed with the accessory or spare part.
WARNING
remove any parts that are pressurized.
Service and maintenance
11.3 Maintenance and repair work
183