TRICON®SMARTTROL™INSTALLATION AND MAINTENANCE GUIDE 7
CHAPTER 4GENERAL DESCRIPTION AND PRINCIPLES OF OPERATION
4.1 DISPLAY
The SmartTrol shows one of three different variables on its 8-digit, alphanumeric displays: Total, Grand Total,
or Rate. Total is typically the volume through the meter in units such as gallons, cubic feet, or cubic meters.
Grand Total is similar to Total but continues to count when Total is reset (very useful for many batching
operations). Rate is the volume flowing through the meter per unit of time. Since Rate and Total values are
scaled independently, different units may be used for each, e.g., Rate displayed in gallons/minute and Total in
cubic feet.
4.2 RESETS
Resets return the value of Total or Grand Total to a predetermined point to begin counting up to or counting
down from. Resets may be manually entered through the keypad by pressing the “CLR” key, remotely
entered by applying 3 to 30 VDC pulse for a minimum of 5 seconds to Pin 5, or by a host computer via
RS-232C communications. The SmartTrol may also be programmed to reset automatically when the
endpoint is reached.
4.3 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 may be configured to count up from zero after a reset, or to count
down from the preset value to zero after reset. Grand Total will only count up from zero to the preset value
after a reset.
4.4 RELAYS
The SmartTrol may be used for monitoring or for control purposes, such as batching. There are two control
relays in the SmartTrol whose operations are based on preset values of Rate, Total, or Grand Total. Each relay
may be programmed to its own preset value. The presets can be programmed to allow two-stage stepping of
a process providing precise control of a dispensing or blending application. For batching applications, an Auto
Reset mode can be selected for continuous blending processes. When Total or Grand Total values are used,
relay duration may be set from 1 to 99 seconds or minutes. NOTE: RELAY OPERATION IS DISABLED WHEN
THE MENU FUNCTION IS ENTERED.
4.5 K FACTOR
The K Factor is divided into the input pulse to convert them into convenient units of measurement. Separate
K Factors are entered into the rate and counter sections of the SmartTrol for each input, and K Factors may be
mixed. Thus, you may batch (totalize) in gallons and display Rate in cubic feet per hour.
CHAPTER 4GENERAL DESCRIPTION AND PRINCIPLES OF OPERATION
