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7.2.4
Behavior in case of faults
Repairs
Defective devices should be sent in to the repair department with details of the fault and the
cause. When ordering replacement devices, please specify the serial number of the original
device. The serial number can be found on the rating plate.
The address of the responsible SIEMENS repair center, contacts, spare parts lists, etc. can
be found on the Internet.
7.2.5
Maintenance/Checking
Interval
We recommend that the functioning of the temperature transmitter is checked at regular
intervals of one year.
Checking the safety function
We recommend that:
● You check the status for warnings and alarms.
● Check the upper and lower alarm current value.
● Perform a 2-point calibration.
● You check the measuring accuracy that must be in the range of ± 2% for the safety
Checking safety
You should regularly check the safety function of the entire safety circuit in line with IEC
61508/61511. The testing intervals are determined during the calculation for each individual
safety circuit in a system (PFD
SITRANS TH200/TH300
Operating Instructions, 06/2010, A5E00393069-03
function. You check the measuring accuracy, for example, with a sensor calibration.
).
AVG
Functional safety
7.2 Device-specific safety instructions
41
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