Advantage Controls MegaTronMT Manual page 16

2.4. Boiler Conductivity
the conductivity sampling method.
Timed sampling incorporates a sample timer which allows the boiler to be sampled at periodic intervals.
Sample intervals are adjustable from 1 minute to 99 hours, 59 min. Sample duration (on-time) is adjustable
from 1 second to 99 minutes, 59 seconds.
Sample and hold uses a sample timer for periodic sampling intervals. The unit will sample for its duration
and then hold the blowdown valve closed for a settable period (hold time). The conductivity is checked at
the end of the hold period, if additional blowdown is required the blowdown valve is held open for a preset
amount of time (blowdown time). Then sample cycle is repeated.
Pulse Sample
water instead of the sample interval timer.
Continuous sample has a sample of boiler or condensate water go past the probe continuously. If the
2.5. Aux Inputs
Auxiliary inputs are the digital inputs for optional Flow Switch and other digital inputs such as low drum level
both or none.
SET POINT - What reading turns the relay on
DIFFERENTIAL - Amount reading changes by before
HIGH ALARM - What reading generates a High alarm
LOW ALARM - What reading generates a Low alarm
Note: Digital inputs can have the direction selected
between OPEN or CLOSED as the alarm polarity. If
set for CLOSED the input will be in alarm when it sees
a closed contact.
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