211
Reference Manual
00809-0100-4530, Rev DD
Safety Instrumented Systems (4-20 mA only)
May 2016
Safety Instrumented Systems (4-20 mA only)
8.8.2
Suggested comprehensive, fully remote proof test
The suggested proof test described below will detect 85% of possible DU failures in the
Rosemount 5300 Series Transmitters.
1.
Bypass the safety function and take appropriate action to avoid a false trip.
2.
Disable write protection if the function is enabled. See
for details.
3.
Using Loop Test, enter current value (mA) representing high alarm current. Verify
that analog output current is correct using the reference meter. See
for
details.
4.
Using Loop Test, enter current value (mA) representing low alarm current. Verify
that analog output current is correct using the reference meter. See
for
details.
5.
Enable write protection. See
for details.
6.
Perform a one-point level measurement verification of the device. Verify the
current level measurement with an independent measurement such as the BPCS
level-sensor or a manual reading.
7.
Remove the bypass and otherwise restore normal operation.
For troubleshooting the transmitter, see
Section 7: Service and Troubleshooting
8.8.3
Suggested partial proof test
The suggested proof test described below will detect 55% of possible DU failures in the
Rosemount 5300 Series Transmitters.
1.
Bypass the safety function and take appropriate action to avoid a false trip.
2.
Disable write protection if the function is enabled. See
for details.
3.
Using Loop Test, enter current value (mA) representing high alarm current. Verify
that analog output current is correct using the reference meter. See
for
details.
4.
Using Loop Test, enter current value (mA) representing low alarm current. Verify
that analog output current is correct using the reference meter. See
for
details.
5.
Enable write protection. See
for details.
6.
Remove the bypass and otherwise restore normal operation.
For troubleshooting the transmitter, see
Section 7: Service and Troubleshooting
Calculations of average probability of failure on demand
PFD
AVG
calculation can be found in the FMEDA report located at