Endress+Hauser Liquisys M CPM253 User Manual

Liquisys M CPM223/253 Commissioning
Endress+Hauser 47
6.6.4 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 R 237 / R 266 via the current output.
C07-CPM2x3xx-05-06-00-xx-004.eps
Fig. 35: User-defined current output characteristic (example)
The current output characteristic must be extremely monotonic increasing or extremely
monotonic decreasing.
The distance per mA between two table value pairs must be greater than:
• pH: 0.03
•ORP: 5mV
• Temperature: 0.25 °C
The values for the sample characteristic ( å 35) are entered in the following table. The
distance per mA can be calculated from  signal /  mA.
10
8
12
6
0 48 121620
I [mA]
D I [mA]
D Signal
pH
Current output 1 Current output 2
Value pair pH / mV /
%/ °C
Current
[mA]
Distance
per mA
pH / mV /
%/ °C
Current
[mA]
Distance
per mA
164
2 8 16 0.166
312201.000

Endress+Hauser Liquisys M CPM253 Specifications

General

Brand	Endress+Hauser
Model	Liquisys M CPM253
Category	Transmitter
Language	English