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I.
Introduction
MicroTron controllers are microprocessor based menu driven units for control of recirculating water applications.
All settings are entered into the controller through a simple front panel keypad which includes relay test
keys.
Model Numbering
MicroTron timer controllers have several base functions and optional features available. Your unit may be
supplied with one or more of the options that are described in this manual. To determine what features apply
to your unit, check the model number label located on the controller enclosure.
Base Functions
All model numbers can be broken down as
follows and will start with an M or L:
M
MicroTron with a VFD display
L
MicroTron with an LCD display
F
Single programmable feed timer
F-2
Dual feed timers
F-3
Triple feed timers
F-4
Quadruple feed timers
B
Single 28 day timer
B-2
Dual 28 day timers
B-3
Triple 28 day timers
II.
Description
Selectable Timers
Selectable timers (base function F) are designed to automate the addition of various chemicals or activation
of other devices via a relay output. Multiple timers can be supplied depending upon the model number, and
each timer will include a relay output. All timers can be programmed to be one of the following types:
. Pulse Timer – This timer accepts dry contact pulses from a make-up water meter (supplied
separately). It can accumulate -250 pulses to activate the timer to run from 0-99 minutes, 59
seconds in minutes and seconds.
2. Percentage – The relay is on for a percentage of a continuously repeating cycle time. Both the
percentage and cycle time are programmable.
28-Day Feed Timers
28-day feed timers, typically used for biocide feed are based on a 28-day cycle with two independent
programmable feed cycles allowing for feed on selectable days and weeks. The biocide timers on units
with selectable timers also include bleed lockout settings. Multiple timers can be supplied depending upon
the model number, and each timer will include a relay output.
Optional Features
This list represents our most popular options.
A
Conduit connections
A-6
On/Off power switch
A-7
Lower enclosure
D
220 V service (conduit only)
E
Mounted flow switch assembly
M
Alarm relay output
M-1S Sonic alarm buzzer with silence switch
V
Digital input for bleed-off water meter
W
Power relay .5 HP max, 25 amps
X
Tank low level alarms
Z-9
Chem A lockout with biocide
3
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