Heinrichs Messtechnik GmbH
OPERATING MANUAL TMU-W / UMC4
Page 83 of 118
7.2.10.1
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 measuring range of up to
110 %.
Press “Enter” to display the current setting.
Current output I1
[4] – 21.6 mA
The current assignment will be displayed and can be changed by toggling the arrow keys.
The operator can choose between the settings:
4 – 20.5 mA
4 – 21.6 mA
Pressing the “Enter” key confirms the entry.
The following diagram displays the impacts of the selected setting
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%
Outp
ut
Measured value
Current Output
4 - 20.5mA
NAMUR
4 - 21.6 mA
Standard
Figure 2: Current Output as NAMUR or Standard
