Ecolab LMI 02 - Signal Output (0;4-20 mA)

417102012_LMI02.doc - 67 - Rev. 9-07.08
6.2.9 Signal output
The signal o
utput supplies a load-independent current of 0/4 –20 mA that corresponds to a
conductivity of 0 to 100% of the selected measuring range.
Four different measuring ranges can be selected under MEASURING RANGE in the
CONFIGURATION FUNCTIONS menu (selected with ▲▼ keys)
10 mS/cm = 20 mA
20 mS/cm = 20 mA
100 mS/cm = 20 mA
200 mS/cm = 20 mA
0..20 mA or 4..20 mA can be selected (selectable with ↵ key, active setting is highlighted)
under CURRENT OUTPUT in the CONFIGURATION FUNCTIONS menu.
Example 1:
1-
A
mA/mScm 1 I }
mS/cm 20 ... 0
mA 20 ... 0
:range Measuring
:output Current
==
Measured conductivity: 15 mS/cm Æ I
A
= 15 mA
Example 2:
200mS/cm
mA 16
I }
cm0...200mS/
mA 20 ... 4
:range Measuring
:output Current
A ==
Measured conductivity:
125 mS/cm Æ I
A
= 0,08 mA/mScm
-1
x 125 mScm
-1
+ 4 mA = 14 mA