Relays
The SmartTrol is 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.
Relay operation is disabled when you enter the MENU function.
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.
Ratemeter
The ratemeter selection of the SmartTrol calculates Rate based on time between pulses
from a maximum of two inputs. The resulting value of input pulses per second is then
divided by the K Factor to display the Rate in units of volume per time.
Counter
The counter section of the SmartTrol divides pulses from a maximum of two inputs by the
Count K Factors to determine Total and Grand Total volumes through the meter in
convenient units of volume.
Lockout
After the SmartTrol is configured and operating, unauthorized changes can be prevented
by using a lock-out code to allow configuration modification. You can modify the code
periodically to maintain secure operations.
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SmartTrol™ Installation and Maintenance Guide
Chapter 4: General Description and Principles of Operation
