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Feed Limit Timer Setup
Feed limit: Disable
Timeout: 3600 sec
Exit Edit
6. Menu Item Options
Feed limit (timer) Disable/AL1/AL2/AL3
Timeout 0-10,800 sec
The controller allows configuring one of the alarms as a Feed Limit
timer. The Feed Limit timer prevent overfeeding of chemical reagent
by automatically turning the relay off after a timeout period. To enable
this feature, press Edit when the Feed limit is highlighted (as on the
left), use the arrow key to select an alarm relay and then press Save
4.
When a feed limit alarm has timed out, a message will appear on the
main display indicating "Feed limit alarm1" (for an alarm 1 feed limit),
the red LED will turn on, alarm 4 will close (if not turned "Off"), the
selected feed limit relay will open (de-energize), but all other alarms
and current outputs will remain unchanged (i.e. this is not a real fault
condition). This condition will continue until the 2 (Ack) key is
pressed, at which time the controller returns to normal operation and
the feed limit's clock starts again. See Table 6-1, Controller Mode
Priority Chart, for controller action in the event of several modes
occurring at the same time.
NOTE
Pressing the 2 (Ack) key will acknowledge all condi-
tions that turn the red LED on. If another event occurs
after the key is pressed, then the key must be pressed
again to acknowledge the new event. This is the only
way to clear a Feed Limit Timeout.
7.00 pH
26.2°C 12.0mA
Feed limit alarm 1
MODEL 54e pH/ORP SECTION 5.0
SOFTWARE CONFIGURATION
5.7 CHANGING ALARM PARAMETERS (continued)
CAUTION
Understanding where to set the TPC parameters is not
trivial and is likely to require substantial trial and error to
yield acceptable results. pH and ORP/Redox are nonlin-
ear measurements and applying PID algorithms can
result in unintended effects.
5. Alarm 4 is dedicated as a fault alarm. The only option for this alarm
is to enable it or to disable it. To disable the alarm, press Edit 4 and
use the arrow key to change "Fault" to "Off" .
When a fault condition exists, the relay will energize and the red LED
on the front display will turn on.
Alarm 4 Setup
Alarm: Fault
Exit Enter
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