5.4
Monitoring functions
The monitoring functions are used to define
various alarms and to set output contacts.
Each individual error can defined to be
effective or not (at the contact or as an error
current). Moreover, the electrode can be
checked for glass breakage (P1, P2), or the
measuring signal can be checked to
ascertain that the electrode is working
properly (it must supply plausible values).
An alarm condition can be defined to activate
a cleaning function (F8).
5.4.1
Alarm
Coding
Field
Selection or range
Factory setting
Display
Info
F
Function group
ALARM
Alarm function settings.
F1
Selection of
contact type
Stead
=
steady
contact
Fleet = fleeting
contact
The contact type selected here
only applies to the alarm contact.
F2
Selection of time
unit
s
min
F3
Enter alarm delay
0 s (min)
0 ... 2000 s (min)
Depending on the unit selected
in F2, the alarm delay is entered
in s or min.
F4
Selection of error
current
22 mA
2.4 mA
This selection must be made
even if all errors are suppressed
in F5.
F5
Selection of error
1
1 ... 255
This is where the errors are
selected that are to trigger an
alarm signal. The errors are
selected via the error number.
Please refer to the table in chpt. 7,
p. 59 for the error numbers. The
factory settings remain in effect
for all errors not edited.
Factory settings are printed in
bold
face;
base version does not include functions in
italics.
F
ALARM
F1
Cont.Type
Stead
F2
Time Unit
s
F3
Err.Delay
0
s
22mA
F4
Err.Curr
F5
Sel.Error
1
PM253E5A.CHP
Liquisys M CPM 223 / 253
Instrument configuration
Hauser
29