Endress+Hauser Proline Promag 300 - Page 33

Proline Promag 300 HART Proof testing
Endress+Hauser 33
For information on the required measured error for the device, see the "Performance
characteristics" section of the Operating Instructions
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Follow the information in the section on "Restrictions for use in safety-related applications,
information on measured errors" →  17.
7.1.2 Test sequence: Testing of current output 1
The Simulation submenu (Diagnostics → Simulation) enables you to simulate, without a real
flow situation, various process variables in the process and the device alarm mode and to
verify downstream signal chains (switching valves or closed-control loops).
Performing the test
For proof testing, use only the Current output simulation parameter (→  34) and
the Value current output parameter (→  34), 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.
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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