10
4.3.2
Open Collector Output Operation
The open collector output can be used as a switch
or a warning that responds when the process value
moves above or below a set point, or it can be used
to generate a pulsing signal with a rate proportional
to the process value. The output can be disabled if
not used (select “OFF” in the OC OUTPUT menu).
The “parameter” mentioned below can be either
conductivity or temperature.
Low Mode:
In this mode, the OC output is only active when
the parameter is lower than a user set point. The
output will be inactive when the parameter value is
greater than the set point plus the hysteresis
value.
High Mode:
In this mode, the OC output is only active when
the parameter value is higher than a user
set point.
The output will be inactive when the parameter
value is smaller than the set point minus the
hysteresis value.
Proportional Pulsing
In this mode, the OC output will generate a pulse sequence
at the rate defined by the setting in the OC OUTPUT menu.
In the following example, the starting point is
10
μ
S/cm
, the end point is
110
μ
S/cm
, and the maximum
frequency is 200 pulses/min:
• The output will be 0 pulses/min when the conductivity value is less than 10
μ
S/cm.
• The output will be 100 pulses/min when the conductivity value is 60
μ
S/cm.
• The output will be 200 pulses/min when the conductivity value is greater than 110
μ
S/cm.
5
Menu
The menu consists of a view menu and an editable menu. The menu has several levels, with the
view menu being at the topmost level. You can loop within the same level menu items by
pressing the
UP
or
DOWN
arrow keys, move to a lower level menu by pressing the
ENTER
key,
and move to an upper level menu by pressing the
ESC
key. At any time, the system will return to
the view menu (default display) if no key is pressed for 10 minutes.
During normal operation, the view menu is displayed. Use the
UP
or
DOWN
arrow keys to select
the information you want displayed. The items will scroll in a continuous loop. System operations
will not be interrupted during menu interaction.
OC
OC
OC
Low Setpoint
Hysteresis
Time
Value
N.O.
N.O.
OC
N.O.
:OC Output Active
:OC Output Inactive
OC
OC
OC
High Setpoint
Hysteresis
Time
Value
N.O.
N.O.
OC
N.O.
:OC Output Active
:OC Output Inactive
