Endress+Hauser Liquisys M CLM223/253 - Current Outputs

Commissioning Liquisys M CLM223/253
42 Endress+Hauser
6.4.4 Current outputs
Use the "Current output" function group to configure the individual outputs. You can enter
either a linear characteristic (O3 (1)) or a user-defined current output characteristic in
conjunction with the Plus Package (O3 (3)). Exception: if you have chosen a "continuous
controller" for current output 2, you cannot enter a user-defined current output characteristic
for this current output.
In addition, you can also simulate a current output value (O3 (2)) to check the current
outputs.
If a second current output is present, you can output the controller actuating variable in
accordance with field R237 / O2 via the current output.
a0008943
Fig. 27: User-defined current output characteristic (example)
The current output characteristic must be strictly monotonously increasing or strictly
monotonously decreasing.
The distance per mA between two table value pairs must be greater than:
• Conductivity: 0.5 % of measuring range per mA
• Temperature: 0.25 °C per mA
1500
1000
2000
500
0 48 121620
I [mA]
 I [mA]
 Signal
[mS/cm]