Tecfluid CU Series - Manual (Page 31)

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Before doing a current calibration, be sure that the ammeter used for that is showing the
real measure.
6.6 Default screen
Flow rate, totalizer or liquid velocity screens can be programmed as a default. Thus, the
converter presents this screen when a power failure occurs or when returning from the
installation or programming menu.
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6.5.4 Programming of the 4-20 mA output
Flow rate values equivalent to each current are entered directly.
6.7 Totalizer
In this screen you can configure the totalizer operation mode depending on the flow
direction. Thus, the value indicated by the totalizer will always be true regardless of the
application where the instrument is installed.
Programming a flow rate value for 20 mA higher than the one for 4 mA, the loop current
changes from 4 to 20 mA as the flow increases.
Otherwise, programming a flow rate value for 20 mA lower than the one for 4 mA, the
current loop will change from 20 to 4 mA as the flow increases.
6.5.5 Current calibration for 4 and 20 mA
The converter CU100 is delivered with the current output already calibrated. If you want to
correct a derive of the 4 or 20 mA current values because they don’t coincide with the
ammeter used, it can be done by pressing the keys (2) and (8) to increase or decrease
the current respectively in each case. The values shown on the screen are reference
levels. When one of this data is confirmed, the CU100 will take the current value shown
on the ammeter as a reference.
CONVERTER PROGRAMMING