Tecfluid CU Series - Manual (Page 30)

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6.5.1 Relay 1 and relay 2
When selecting one of these screens we have access to program the flow rate at which
the relays will change its state and to the level of hysteresis. By level of hysteresis we
understand the difference between connection and disconnection of the output. To avoid
that an alarm output is continuously moving from activate to deactivate state, we must
program the points of connection and disconnection.
If “Unidirectional” is chosen, the analog output will have a value proportional to the flow
rate when positive, and it will provide always 4 mA when negative.
If “Bidirectional” is chosen, the analog output will have a value proportional to the flow rate
whether it is positive or negative.
6.5.3 Configuration
It allows to choose between unidirectional and bidirectional.
Example
If the activation point is programmed to 100 m3/h and the deactivation point is
programmed to 90 m3/h, when the flow rate is zero the output will be off. When the flow
rate reaches a value of 100 m3/h the output will go on and it will not go off until the level
falls below 90 m3/h.
If we program an activation point of 90 m3/h and a deactivation point of 100 m3/h, when
the level is zero the output will be on. When the flow rate reaches a value of 100 m3/h the
output will go off and it will not go on until the flow rate falls below 90 m3/h.
6.5.2 Analog output
The flow rate corresponding to 4 mA and 20 mA, and the calibration for these two values
can be programmed.
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CONVERTER PROGRAMMING