AUBER INSTRUMENTS
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2018.08
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the
C-F
setting in the
SYST
menu. The intended use of
BOIL
Mode is to bring
water or wort to its boiling point and remind the user to add hops. The default set-
values of all steps in BOIL Mode are 0% of power. It is displayed as “
P 0
”, where
the letter
P
indicates this is a percentage value of power.
Despite the difference in the default set-values, the DSPR320 controller does allow
the user to change set-values freely from temperatures to power percentages, or
vice versa. Any step in MASH mode can be a power-control step (boiling step),
and any step in BOIL mode can be a temperature-control step (mashing step).
This feature gives users a great flexibility to customize the desired heating profiles
per their brewing recipes and control automation needs.
Please note that switching Program Mode while a program is running will result in
the program being terminated immediately. This operation is not recommended.
5.2.
Program
A Program refers to a series control steps that has been saved under a Program
Mode (
MASH
or
BOIL
). A program can have no more than 9 steps. When the user
edits a program, if a step’s step-timer is set to
END
, the user won’t be asked to
enter settings for the next step.
When the controller runs a program, it always starts from Step 1 or the first valid
step and ends at either at the step where the step-timer is set to
END
or at Step 9
if it exists.
The MASH Mode has a special feature that allows the controller to continue to run
the program saved in BOIL Mode automatically when the Mash program is finished.
To use this feature, the last step in the MASH Mode should be set to
CONT
instead
of
END
by turning the knob counter-clockwise for a full turn.
The user can go to
mPRG
(MASH mode program) and
bPRG
(BOIL mode
program) in the main menu to enter or edit the programs.
Step settings in
mPRG
and
bPRG
are named in this format:
a
X
-
B
,
where:
a
: can either be letter
m
or
b
to indicate MASH mode or BOIL mode.
X
: a numeric number ranging from
1
to
9
.
B
: can either be letter
S
or
t
where
S
: set-value.
t
: step-timer.
For example, the parameters of the Step 1 of MASH mode are
m1-S
and
m1-t
while the parameter of the first step of BOIL mode are
b1-S
and
b1-t
.
5.3.
Step
A
step
can be considered as one of many sections that consist a program. It
defines the temperature or power percentage that the controller should maintain
for a certain duration of time. A step is exclusively referring to the time period when
the temperature has reached a pre-defined timer-start-point and the step-timer is
counting time. The beginning of a step is when the step-timer starts and the end
of a step is when the step-timer ends. In a program, the sections between steps
are transition sections, or called ramp sections. The controller doesn’t regulate the
ramp-up or ramp-down speed.
The settings of a step consist of the set-value and the step-timer. The step-timer
only starts counting when the temperature has reached a pre-defined timer-start-
point (see section 5.6 for details).
5.4.
Ramp Sections
In DSPR320, program sections between steps are called ramp sections. Some of
the relay functions are closely associated with the ramp sections, hence a clear
definition of each section is necessary. A
STEP
section is exclusively referring to
the time period when the temperature has reached a pre-defined timer-start-point
and the step-timer is counting time. The section prior to the start of a
STEP
as well
as its step-timer is referred as the
RAMP
section of a step. A ramp section where
the temperature needs to be ramped up is called
HEAT
section. A ramp section
where the temperature needs to be cooled down is called
COOL
section. A
RAMP
section and a
STEP
section together are referred as an
Extended Step (EXTN)
section. The plot in Figure 13 shows a short two-step program to illustrate what
the different sections are. The description of each section is given in the table.
Please note
that the controller determines whether a section is
HEAT
or
COOL
by comparing the current probe reading and the step’s set-value instead of
comparing the set-values of two steps.
Figure 13. A two-step program to illustrate different program sections.
Table 6. Program sections of the two-step example program.
Step #
Time Range
Description
Section
Type
1
0 ~ 5 min
Ramp section of Step 1, which is a HEAT
section
RAMP,
HEAT
5 ~ 10 min
Step 1
STEP
0 ~ 10 min
Extended Step 1
EXTN
2
10 ~ 20 min
Ramp section of Step 1, which is a COOL
section
RAMP,
COOL
20 ~ 40 min
Step 2
STEP
10 ~ 40 min
Extended Step 2
EXTN
To determine whether a transition section is
HEAT
or
COOL
, the controller
compares the current probe reading against the step’s set-value instead of
comparing the set-values of two steps. This comparison only happens when the
program is in a transition section, i.e., when the step-timer of the next step hasn’t
yet started.
However, the boiling steps (power-control steps) are handled differently since
there is no set-value for boiling steps. For boiling steps, the controller uses the
bTSP
(boiling timer-start-point) for comparison purpose. Table 7 listed the
different situations of how the controller determine HEAT or COOL of a ramp
section.
Table 7. Determine HEAT or COOL between two steps.
To Step (n+1)
Mashing Step
Boiling Step
From Step
(n)
Mashing Step
PV vs SV
PV vs bTSP
Boiling Step
bTSP vs SV
bTSP vs bTSP (N/A)
5.5.
Step-Control Mode
The
step-control mode,
or control mode, refers to how the power is regulated at
a step, which can either be
temperature-control
or be
power-control
. In
temperature-control mode, the goal is to raise and maintain the water or wort
temperature at the specified value. The steps that have set values in temperature
(0 ~ 932 °F/°C) use
temperature-control
mode and these steps are sometimes
referred as
mashing steps
for convenience. In the
power-control
mode, the goal
is to bring water or wort to boil by raising the water or wort temperature above
