Commissioning Liquisys M CPM223/253
62 Endress+Hauser
Coding Field Setting range
(Factory settings, bold)
Display Info
R
RELAY function
group
Relay contact settings.
R1
Select contact to be
configured
Rel1
Rel2
Rel3
Rel4
Rel3 (water) and Rel4 (cleaner) are only
available with the relevant version of the
transmitter.
If Chemoclean is used as the cleaning
method, Rel4 is not available.
R2 (1)
Configure limit
contactor for pH/
ORP measurement
LC PV = limit contactor
pH/ORP (1)
LC C = limit contactor T (2)
PID controller (3)
Timer (4)
Clean = Chemoclean (5)
Neutra controller (6)
PV = process value
If Rel4 is selected in the R1 field,
Clean = Chemoclean cannot be selected.
By confirming with ENTER, another relay
function already switched on is switched
off and its settings are reset to the factory
settings.
R211
Switch function of
R2 (1) off or on
Off
On
All the settings are retained.
R212
Enter the switch-on
point of the contact
pH 16.00
pH -2.00 to 16.00
1500 mV
-1500 to 1500 mV
100.0 %
0.0 to 100.0 %
Never set the switch-on point and the
switch-off point to the same value!
(Only the operating mode selected in A1
is displayed.)
R213
Enter the switch-off
point of the contact
pH 16.00
pH -2.00 to 16.00
1500 mV
-1500mVto1500mV
100.0 %
0.0 to 100.0 %
Entering a switch-off point selects either a
Max contact (switch-off point < switch-on
point) or a Min contact (switch-off point >
switch-on point), thereby implementing a
hysteresis that is constantly required (see
"Illustration of the alarm and limit
functions" figure).
R214 Enter pick-up delay
0 s
0to2000s
R215 Enter drop-out delay
0 s
0to2000s
R216
Enter alarm
threshold
pH 16.00
pH -2.00 to 16.00
1500 mV
-1500 to 1500 mV
100.0 %
0.0 to 100.0 %
If the alarm threshold is undershot/
overshot, this triggers an alarm with the
error message and error current at the
transmitter (note alarm delay in field F3).
If defined as a Min contact, the alarm
threshold must be < switch-off point.
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