Evoqua WALLACE & TIERNAN MFC, Instruction Manual

Page: 102 / 268

102
WT.050.580.000.DE.IM.0714
Functions
MFC
4.
4.8 Alarms
The alarms are output via relay contacts and the red LED. The
number of up to eight alarms is stipulated in the application.
Each alarm can be assigned the following functions:
• Limit value = Min All measured values individually
selectable Cl
2
, pH, mV, Cl-N,
conductivity, etc.
• Limit value = Max All measured values individually
selectable Cl
2
, pH, mV, Cl-N,
conductivity, etc.
• Digital inputs 1 to 3 can be selected individually
• Error
The type of alarm can be selected in the "Alarms" menu in the
displays "Alarm ... Functions" (display 1.6.1 and 1.6.2“Alarm -
Menu 1.6" on page 139) There are three types of alarm.
In all alarm types the response can be influenced by entering a
delay (td) (refer to the diagrams in this chapter).
Unlatched alarm without
acknowledgement option (N.O.
unlatched N.C. unlatched)
The LED lights up in the event of an alarm and goes out
automatically when the alarm conditions are eliminated. The same
applies for the contact.
M I N
R e l a y w i t h o u t
d e l a y
L E D w i t h o u t
d e l a y
R e l a y w i t h
d e l a y
L E D w i t h
d e l a y
R e l a y w i t h
d e l a y
L E D w i t h
d e l a y
A l a r m ( u n l a t c h e d )
t
d
t
d
t
d
t
d
t
d
t
d
t
d
t
d
t
d
t
d
t
d
t
d