72-910-16 Rev. N
Page 39 of 43
Inputs – receptacles or hock-ups for signals delivered to the controller
Interval – the amount of time between bleed events
Isolated Input – an input (analog or digital) that is electrically isolated from main power supply and its ground
(ISO) Isolation Valves – general term that refers to valves in the system used to isolate various components of the
system from the main flow
Jumper – a wire connector (shunt) that connects two (2) points
LED – abbreviation for Light Emitting Diode
Limit Timer – also referred to as lockout timer or feed limit timer, it limits the amount of time output is activated
Line Voltage – voltage equivalent to outside source voltage to the controller
Lockout – intentionally preventing bleed or other functions of the system
Low Current – 4 mA signal
Menu Map – printed document supplied with controller illustrating all menu item locations
Metering Pump – see chemical feed pump
Micro Siemens – unit of measure of conductivity expressed as S/CM
Outputs – receptacles or hook-ups for signals originated at the controller
Overfeed – a condition in which the quantity of an ingredient dispersed into the system exceeds the amount desired
Percent Post Bleed – refers to the amount of time as a percentage of bleed time that chemical feed pumps are
activated when bleed down is deactivated
Percent Timer – also referred to as a cycle timer that runs continuously that activates an output to run as a percent
of total cycle time
Pre Bleed – refers to the time bleed is executed before biocide feed
Program Parameters – the user programmed settings that determine how the controller responds to conditions of
the system under control
Prompt – a curser used to indicate the active menu line
Pulse – the action of a water meter that when equipped with a contact head, can generate a dry contact closure that
can be read by the controller
Pulse Timer – a feature of the controller in which a timer accepts pulses from a water meter to actuate a chemical
feed pump
Relay Indicators – lights (LED’s) located on the face of the control panel that indicate the status of individual
relays
Sample – to obtain a quantity of water for test purposes,
Sample Cock – see Sample Valve
Sample Line – a line through which a portion of the system water flows, where probes and other monitoring
devices are located controlled with isolation valves
Sample Valve – small valve on the flow assembly that provides user a means to drain small quantities of water
from the system for testing
Security Code – a code that can be entered by the user when configuring the system to secure access to the
controller settings
Probe – a device connected to the controller which monitors or measures a characteristic value in the water, like the
conductivity
Sensor – see Probe
Set point – the user determined value within a monitored range at which the controller initiates action (e.g.,
activates a relay)
Set point Differential – also referred to as dead band or hysteresis; the offset applied to a set point to prevent
chattering of an output relay around a set point
Soft Keys – Buttons on front panel used to input information
Solenoid – an electromagnetically controlled switch
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