Endress+Hauser Proline Prosonic Flow P 500 Functional Safety Manual page 35

Proline Prosonic Flow P 500 HART
Performing the test
For proof testing, use only the Current output simulation parameter (→  31) and the
Value current output parameter (→  32), as these are the only parameters approved
for testing the safety-related characteristics.
1. In the Value current output parameter (→  32), select the defined default values one
after the other.
2. Compare current at output 1 with this default value.
Comparing the current values
The current values can be compared using one of the following methods:
• Measure the current of the DUT at the logic subsystem (process control system or safety-
related PLC).
• Measure the current at the DUT using an external, traceably-calibrated ammeter.
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Compare the current values.
Connecting the measuring equipment and external testing
• Connecting the measuring equipment in the measuring circuit
• External check of the passive current output
Requirements for the measuring equipment:
• DC current measuring uncertainty ±0.2 %
• DC current resolution10 µA
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 4 External verification taking the example of a passive current output
1 Automation system with current input (e.. g. PLC)
2 Power supply unit
3 Ammeter
4 Transmitter
1. Connect the ammeter to the transmitter by looping it in series into the circuit.
2. Connect the power supply unit.
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Use in protective systems
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