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OPERATING MANUAL HPC & UMC4
14.10.1 Current output I1 4 to 20 mA
The “Current output I1 4 to 20 mA” function allows the operator to define the range in which the current
output is to be operated. Within the range from 4 to 21.6 mA (= 0 ... 110 %) HART
communication is not
possible. The range from 4 to 20.5 mA follows the NAMUR recommendation and covers the range from 0
to 104 % of the measuring range. The standard range from 4 to 21.6 mA allows for a control of the meas-
uring range of up to 110 %.
Press
„Enter“ to display the current setting.
Current output I1
[4]
– 21.6 mA
As mentioned in Section 13.4.3.1 Selection window/make a selection, the operator can choose between
the following settings:
0,0 mA
5,0 mA
10,0 mA
15,0 mA
20,0 mA
25,0 mA
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
110%
120%
Ou
tp
ut
Measured value
Current Output
4 - 20.5mA
NAMUR
4 - 21.6 mA
Standard
14.10.2 Current output I1 alarm
This function allows the operator to define the state taken on by the current output when a state of alarm
is detected. This information can be analyzed in the control system. Press
„Enter“ to display the current
setting:
I1 : alarm
[>22mA]
As mentioned in Section 13.4.3.1 Selection window/make a selection, the operator can choose between
the following settings:
not used
no alarm function
> 22 mA
current rise in the case of an alarm
< 3.8 mA
current reduction in the case of an alarm