Device-specific safety instructions
3.3 Settings
Functional safety for SITRANS P, series DS III PROFIsafe
Product information, 07/2006, A5E00849297-01
3-3
Warning
The binding settings and conditions are listed in the "Settings" and "Safety characteristics"
sections.
These conditions must be met in order to fulfill the safety function.
The calculated Mean Time Between Failures (MTBF) for the SITRANS P pressure
transmitter is approximately 282 years.
See also
Settings (Page 3-3)
Safety characteristics (Page 3-5)
3.3
Settings
The following settings must be adhered to after installing and commissioning as per the
Operating Instructions:
Operation/configuration
While operating/configuring, ensure that the technical data of the pressure transmitter are
adhered to in their respective version.
Checking the safety function
We recommend that:
•
You check the status for warnings and alarms.
•
You check the measured value limits.
•
Simulate various measured values and statuses.
•
You check the measuring accuracy that must be in the range of ± 2% for the safety
function.
–
You check the zero point, e.g. in a pressure-less state, for gauge and differential
pressure.
–
You check the zero point, e.g. with a defined pressure, for absolute pressure.
Protection against configuration changes
After parameterizing/commissioning:
1.
Set the lock mode in Mode 10 to write protection "L".
Operation via buttons and PROFIBUS communication is blocked.
2.
Protect the keys from unintended change in the parameters, e.g. by lead-sealing.
