Neptune Technology TRICON SmartTrol, Руководство по установке и обслуживанию

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TRICON
®
SmartTrol
™
Installation and Maintenance Guide
7
Chapter 4: General Description and Principles of Operation
This chapter provides a general description and the operating principles of the
TRICON
®
SmartTrol™.
Display
The SmartTrol shows one of three different variables on its eight-digit, alphanumeric
displays:
l
Total - the volume through the meter in gallons, cubic feet, or cubic meter units.
l
Grand Total - similar to Total but continues to count when Total is reset.
l
Rate - the volume flowing through the meter per unit of time.
Since Rate and Total values are scaled independently, different units can be used for each.
For example: Rate displayed in gallons / minutes and Total in cubic feet.
Resets
A Reset returns the value of a Total or Grand Total to a predetermined point to begin
counting up to or counting down from. To Reset the Total or Grand Total, complete one of
the following:
l
Manually enter the value through the keypad and press the “CLR” key.
l
Remotely enter the value by applying 3 to 30 VDC pulses for a minimum of 5 seconds to
Pin 5.
l
Use a host computer via RS-232C communications.
The SmartTrol can be programmed to reset automatically when it reaches the endpoint.
Presets
Presets are the values of Total or Grand Total the totalizer must reach, or the Rate of flow
the ratemeter must register, to trigger relay operation. Total is configured to count up
from zero after a reset, or to count down from the preset value to zero after reset. Grand
Total only counts up from zero to the preset value after a reset.