30
Time Prop Hi
Press ENTER when this is displayed to use time proportional control with a high set point. In Time Proportional
Mode, the farther away from the set point the system is, the longer the ON time. Refer to the drawings below for
an illustration of Time Proportional Mode. A time limit menu will be available, to prevent runaway control. An
Interlock menu will be available to allow you to stop control.
Mode
(Continued)
Time Prop Lo
Press ENTER when this is displayed to use time proportional control with a low set point. In Time Proportional
Mode, the farther away from the set point the system is, the longer the ON time. Refer to the drawings below for
an illustration of Time Proportional Mode. A time limit menu will be available, to prevent runaway control. An
Interlock menu will be available to allow you to stop control.
Assign Input
Press
ENTER
to change the sensor signal which will be used to control the output. Use the arrow keys to toggle
between “Sensor A” and “Sensor B”. Press
ENTER
to accept the change.
Low Set Point
Only appears if the Mode is Low Set Point or Time Prop Lo
Press
ENTER
if you want the Control relay to close if the process goes below a certain value. The status screen
message will be Output ON. This denotes a normal correction of the process value. If you want the status
message to be Low Alarm, indicating a problem, choose an Output Mode of Low Alarm as described below.
High Set Point
Only appears if the Mode is High Set Point or Time Prop Hi
Press
ENTER
if you want the Control relay to close if the process above a certain value. The status screen
message will be Output ON. This denotes a normal correction of the process value. If you want the status
message to be High Alarm, indicating a problem, choose an Output Mode of High Alarm as described below.
Low Alarm
Only appears if the Mode is Low Alarm, In Range or Out of Range
Press
ENTER
if you want the Control relay to close if the process goes below a certain value. The status screen
message will be Output ON. This denotes a normal correction of the process value. If you want the status
message to be Low Alarm, indicating a problem, choose an Output Mode of Low Alarm as described below.
High Alarm
Only appears if the Mode is High Alarm, In Range or Out of Range
Press
ENTER
if you want the Control relay to close if the process above a certain value. The status screen
message will be Output ON. This denotes a normal correction of the process value. If you want the status
message to be High Alarm, indicating a problem, choose an Output Mode of High Alarm as described below.
Dead Band
Use the arrow keys to set the desired dead band, then press
ENTER
.
If the set point is pH 7.00, and the dead
band is 0.05 pH units, then the relay will close at pH 7.00 and open 0.05 pH units away from 7.00.
DEAD
BAND
HIGH SET
POINT
mV
TIME
Pump On
Pump Off
Pump On
HIGH SET
POINT
mV
TIME
ZERO DEADBAND: NOT RECOMMENDED
Pump On & Off rapidly, damaging relay
