Endress+Hauser Liquisys M CCM223, Operating Instructions Manual

Page: 52 / 124

Commissioning Liquisys M CCM223/253
52 Hauser
SCS monitoring functions at a glance
Functional
description Setting
possibility Alarm event Application
Alarm threshold
monitoring
(P111 to P114)
(P111 to P114)
– freely
adjustable
lower alarm
threshold (AT)
– freely
adjustable
upper alarm
threshold (AT)
off —
Applications with
or without
chemical
entrainment
control
only lower AT lower AT reached or
dropped below
only upper AT upper AT reached or
exceeded
lower and
upper AT
lower AT reached or
dropped below or upper
AT reached or exceeded
Controller
monitoring (CC:
Controller
Check,
P115 to P118
P125 to P128)
– Switch-on
period
monitoring
– Switch-off
period
monitoring
off —
Applications with
chemical
entrainment
control
on Set maximum period for
permanent switch-on or
switch-off exceeded
Sensor activity
monitoring (AC:
Alternation
Check,
P115 to P118
P125 to P128)
Monitoring for
signal change
off —
Applications with
or without
chemical
entrainment
control
on Change within 1 hour
less than ±0.1 mg/l or
±1 %SAT or ±2 hPa
• ±0.01 mg/l
(CCS140/240,
Sensor 963)
• ±0.005 mg/l
(CCS141/241)
• pH ±0.01
• ±1 mV