Time Constant; Dual Phase Pulse Output; Timeouts In Programming Mode; Output Hardware - KROHNE OPTISONIC 3400 Handbook

OPERATION
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6.4.12 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.
Short time constant
Long time constant
The time constant corresponds to the elapsed time until 67% of the end value has been reached
according to a step function.

6.4.13 Dual phase pulse output

A dual phase pulse or frequency output is possible. 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:
• C2.3.11: Phase shift to D or shift to A
• All functions for output B are set using output D or output A.
• C2.5.11: Setting phase shift from output B relative to D, if terminal pair D was selected in
C2.3.11. 0°, 90° or 180° are offered as options.

6.4.14 Timeouts in programming mode

Normal menu function: If no key has been pressed for 5 minutes in a normal menu function, the Normal menu function: Normal menu function: Normal menu function:
display automatically switches to measuring mode. All changes are lost.
Test function: In test mode, the test function is finished after 60 minutes. Test function:
Test function: Test function:
GDC IR Interface: If the GDC-IR connection is activated, it is cancelled after 60 seconds if no GDC IR Interface: GDC IR Interface: GDC IR Interface:
connection is established. If the connection is interrupted, the display can be operated again
after 60 seconds using the optical keys.

6.4.15 Output hardware

Depending on the hardware modules used (see CG number), it may be possible to change the
output options on terminals A, B, C or D in the menus C2.1.x. For example: A pulse output to a
frequency output or a status output to a control input.
The available options are determined by the hardware module used. It is not possible to change
the type of output, e.g. from active to passive or to NAMUR.
80
Fast response times
Fluctuating reading
Slow response time
Stable reading
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OPTISONIC 3400
05/2016 - 4002037705 - HB OPTISONIC 3400 R05 en