GE MN-ValVue-v2-8-IOM Instrukcja Obsługi Pobierz pdf (Strona 591)

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Diagnostics Tab

 Number of points to sample

 Step Profile: Measures the position response over time of

the valve to a request to change position. o Starting position

(%). This test produces a time vs. position graph where the

valve is requested to change position. The graph can

contain data for 2 to 10 seconds of data with data every 0.1

seconds.

 Ending position (%)

 Sample time – Number of seconds to sample at each

step

Figure 14 Step Response Test Results

 Extended Actuator Signature: The same test as the standard

actuator signature except that you can specify a position

range for the test and that sample data is taken more

frequently. (every 0.1 seconds). This provides a much more

detailed signature. The ending position may be less than 0

(e.g. –5.0%) which allows a signature to examine the seating

response of the valve.

An Extended Actuator Signature test produces a pressure vs.

position graph where the actuator pressure is first

increased slowly then decreased slowly. The graph displays

data for the user selected position range both increasing

and decreasing with data sampled every 0.1 seconds.

 Starting position (%)

 Ending position (%)

1 2 ... 586 587 588 589 590 591 592 593 594 595 596 ... 659 660

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