The Alarms Key; Sensor Alarms; System Alarms - Nalco 3D TRASAR Series Installation And Operation Manual

4.11 The Alarms Key

Control Alarm
Settings Settings

4.11.1 Sensor Alarms

Sensor Alarms are activated when an error is detected in the sensor probes. These alarms are
typically the result of improper or loose wiring, or faulty probes.
• Conductivity Sensor Error
• RTD Sensor Error
• pH Sensor Error*
• ORP Sensor Error*
NOTE: pH and ORP are high impedance measurements, and it is difficult to detect
missing or miswired probes. Therefore, the pH and ORP Sensor Errors are not
!
always triggered. Inaccurate or fluctuating readings are another indication of a
miswired or faulty probe.

4.11.2 System Alarms

System Alarms are related to cooling system parameters that are not controlled by the 3D TRASAR
system. Interlock and No Flow alarms supercede all other alarms, such that the other alarms in all
categories are disabled during Interlock and No Flow alarms. Likewise, the Interlock alarm
supercedes the No Flow alarm.
• Turbidity High
• Temperature High
• Temperature Low
• Cell Fouling High
• No Flow
• Interlock
Interlock - The Interlock digital input provides the ability to use a signal, for example, from the
recirculation pumps to enable or disable the 3D TRASAR control relays. If the recirculation pumps
are turned off, the contact is opened, and the Interlock alarm occurs immediately , disabling all
control relays. Control is restored when the recirculation pumps are turned back on and the contact
is closed, which clears the Interlock alarm. If this feature is not needed, the Interlock input must be
shorted with a wire jumper so the contact is always closed.
Technical Help
(630) 305-CHEM
3D TRASAR
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Copyright © 2009 Nalco Company
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5500 - Installation & Operation Manual
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