Siemens SITRANS P Instruções de Operação descarregar pdf (Página 148)

● Check

the measuring accuracy, which must be within the range of the application-specific

measuring error for the safety function.

– Set the measured value display to a unit of pressure in Mode 13.

– Check the zero point, e.g. in a pressureless state, for gauge and differential pressure.

– Check the zero point for absolute pressure, e.g. by applying a defined pressure.

– Check the upper limit of the measuring range (URL) and the upper limit of the span set

(URV) for gauge, absolute and differential pressure by applying a defined pressure.

– Reset the measured value display to the required value in Mode 13.

● Check the triggering of the safety function.

Protection against configuration changes

After parameterizing/commissioning:

1. Set the lock mode in Mode 10 to write protection "L".

Operation via keys and HART communication is blocked.

2. Protect the keys from unintended change in the parameters, e.g. by lead-sealing.

8.3.4 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. You will find the serial number on the nameplate.

The address of the responsible SIEMENS repair center, contacts, spare parts lists, etc. can

be found on the Internet.

8.3.5 Maintenance/Checking

Interval

We recommend that the functioning of the pressure transmitters be checked at regular intervals

of one year.

Checking the safety function

Check the safety function as detailed in the chapter Settings (Page 145).

Functional safety

8.3 Device-specific safety information for redundant operation (SIL 3)

SITRANS P, DS III series with HART

146 Operating Instructions, 09/2012, A5E00047092-08

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Siemens SITRANS P Instruções de Operação Página 148