Endress+Hauser HART Proline Promass 500, Специальная документация

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Use in protective systems Proline Promass 500
42 Hauser
Performing the test
For proof testing, use only the Current output simulation parameter (→  36) and the
Value current output parameter (→  36), as these are the only parameters approved
for testing the safety-related characteristics.
1. In the Value current output parameter, 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.
‣
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
2 1
A
3
4
A0034446
 6 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.