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SUPERtrol-I LE Flow Computer
Flow Signal Timeout
The Flow Signal Timeout allows the user to enter a timeout of 0 to 99 seconds. If a batch is “Filling” and zero flow
persists for more than the user entered time then the batch will be aborted. This prevents over flows due to faulty
flow sensors and/or wiring.
Flow Equation
A flow control expression or algorithm describing a mathematical equation to be solved by a flow computer in the
desired application.
Follow Alarm
Alarm relays which are non latching and whose output state is based solely on the comparison of the current
process value, the alarm setpoint (trip point) and hysteresis.
Function Key
A key on a push-button panel or keyboard (whose function is described by the key label) used to perform an
instrument function or special routine.
Handshake
A means of controlling the information flow between two pieces of equipment to prevent the sending device from
transmitting information at a rate faster than what can be accepted by the receiver.
Hysteresis
The relay hysteresis is a "dead band" setting which allows the relay to remain energized for a given amount below
the setpoint. This is used to prevent relay chatter when the process value is near the setpoint value.
Example: If the Preset is set at 100, and the hysteresis is set at 10, the relay will energize when the rate, temp or
dens. reaches 100, the relay will remain energized until the reading falls below 90.
Input Termination
Input signal lines on digital inputs often require pullup or pulldown resistor configurations to operate properly
with different sensor configurations. The ST1LE contains such resistors and may be enabled via the setup menu.
Inhibit Totalizer
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Inhibit Total
" is a Control Input 1 setting that is used to stop the totalization. If enabled, a voltage level on control
input 1 will inhibit the total as long as the voltage is present. This feature is useful during meter proving and in
applications that provide a sensor to signal the flow computer when liquid is present.
K-Factor
A scaling factor derived from the pulses produced by a flowmeter output, expressed in pulses per unit (i.e. pulses/
gallon)
LCD
Abbreviation for: Liquid Crystal Display
Limit Setpoint
An alarm trip point setting which specifies the value or magnitude of a process parameter necessary to activate an
alarm indicator or control relay.
Linear Flowmeter
A flow measurement device whose output is proportional to flow.
Linearization
The mathematical correction of a nonlinear device. The ST1LE uses a linearization Table which is made
up of input frequency and K-Factor values and makes interpolations of the table to arrive at a "linearized"
measurement.
LinTbl
Abbreviation for Linearization Table.
