KROHNE MFC 400 EN - Manual (Page 103)

OPERATION
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MFC 400
www.krohne.com 08/2013 - 4002075802 - MA MFC 400 R02 en
6.5.22 Time constant
To better process widely fluctuating measured values in the device, the measured values are
digitally filtered to stabilise the output. The time constant can be individually set for each output,
the first line of the display and the density measurement. However, keep in mind that the degree
of filtration affects the response time of the device in the event of rapid changes.
The time constant corresponds to the elapsed time until 67% of the end value has been reached
according to a step function.
6.5.23 Dual phase pulse output
A dual phase pulse or frequency output is often required for custody transfer applications. This
operating mode requires 2 terminal pairs. Terminal pairs A and B or D and B can be used.
In this case, perform the following settings:
• C3.3.11: Phase shift to D or shift to A
• All functions for output B are set using output D or output A.
• C3.5.11: Setting phase shift from output B relative to D, if terminal pair D was selected in
C3.3.11. 0°, 90° or 180° are offered as options.
• C3.2.11: Setting the phase shift from output B relative to A, if terminal pair A was selected in
C3.3.11 0°, 90° or 180° are offered as options.
6.5.24 Timeouts in programming mode
Normal menu function: Normal menu function: Normal menu function: Normal menu function: If no key has been pressed for 5 minutes in a normal menu function, the
display automatically switches to measuring mode. All changes are lost.
Test function: Test function: Test function: Test function: In test mode, the test function is finished after 60 minutes.
GDC IR Interface: GDC IR Interface: GDC IR Interface: GDC IR Interface: If the GDC-IR connection is activated, it is cancelled after 60 seconds if no
connection is established. If the connection is interrupted, the display can be operated again
after 60 seconds using the optical keys.
Short time constant Fast response times
Fluctuating reading
Long time constant Slow response time
Stable reading
.book Page 103 Monday, August 26, 2013 9:05 AM