AUBER INSTRUMENTS
WWW.AUBERINS.COM
2018.08
P5/11
certain threshold and then let the user to adjust the power output percentage
manually. Steps that have set values in percentage (0% ~ 100%) use
power-
control
mode and these steps are sometimes referred as
boiling steps
for
convenience.
For any step in a program, the control mode can be either temperature-control or
power-control. The MASH or BOIL mode doesn’t impose any constraint on the
control mode of any step in its program. When entering the set-value for a step,
the user can simply select either a power percentage number or a temperature
value as the set-value.
Please note that “
mashing step
” or “
boiling step
” refers to how the power is
controlled for a particular step, while the “
mash mode
” or “
boil mode
” refers to
the program mode that is intended to be used for the mash or boil process.
5.6.
Set-Value
The set-value of a step can be either a power percentage value (from 0% to 100%)
or a temperature value (from 0 to 932). The percentage numbers and the
temperature values together make up a combined list of available set-values:
0%, 1%,....99%, 100%, (bo) (ma), 0, 1, 2, … 931, 932.
When editing the set value, the user can rotate the knob to select the desired value.
Turning the knob clockwise will increase the value, and turning the knob counter-
clockwise will decrease the value. When the value changes from percentage to
temperature, the lower window will show “
MA
” shortly to remind the user the set
value is temperature value for mashing. Conversely, when turning the knob
counter-clockwise and as the value changes from temperature to percentage, the
lower window will show “
BO
” shortly to remind the user the set value is power
percentage for a boiling step. All temperature values have the letter “
M
” displayed
on the left side, and all percentage values have the letter “
P
” will be display on the
left side to indicate these are percentage values. For example, 0% is displayed as
“
P 0
” and 0 degree is displayed as “
m 0
”.
When the program is running, temperature set-values will NOT have the letter “
M
”
displayed on the left, but the percentage values do have the letter “
P
” on the left.
5.7.
Step-Timer
The step-timer defines the time duration of a step where the temperature or the
power should be maintained at its set-value. The timer can be set to anywhere
between 0 minute to 99 hours. The time duration is displayed in the format of
HH:MM
.
The step-timer setting can also be a special command which tells the controller
how to handle this step instead of counting down time. The special command can
be
SKIP
,
HOLD
,
END
, or
CONT
. The meaning of a command is explained in the
table below. Please note that “CONT” is not available to the BOIL program mode.
Table 8. Special commands of step-timers.
Command
Description
SKIP
Bypass this step.
HOLD
Hold the program at the current step. Press RUN key to continue to
the next step.
END
End the program.
CONT
End the MASH Program and continue to execute the first step of the
BOIL program. Only available to MASH Program.
When the controller executes a step, it won’t start the step-timer or execute the
special command until the probe reading has reached a timer-start-point. For
temperature-control steps (mashing steps), the timer-start-point is determined by
tSP
, which defines a two-sided deviation band around the set-value (see Figure
14). For power-control steps (boiling steps), the timer-start-point is determined by
bTSP
, which defines an absolute temperature value above which the timer should
start. Once this temperature is reached, the controller will start counting down time
until the time is reached, or execute the special command. Once the timer starts,
it won’t stop nor pause because of the probe temperature drops output of the timer-
start-point. However, the user can manually pause the timer by pressing the HOLD
key, and then resume the timer by pressing the RUN key.
70
90
110
130
150
170
190
210
230
0
5
10
15
20
25
30
35
40
45
Te
m
p
e
ra
tu
re
(°
F)
Time (min)
SV + tSP
bTSP
SV ‐ tSP
Boiling step
Mashing step
Figure 14. The timer-start-point of boiling steps and mashing steps are defined
differently.
5.8.
End or Stop the Program
When the last step of a program is executed, the program ends and controller will
either show “
END
” or “
STOP
”. In DSPR320,
End
and
STOP
are different status.
STOP
means the controller has turned off all outputs, including the main SSR
output as well as both relays.
END
means the program has come to an end, but
the controller will continue to regulate the temperature or the power per the set-
value of the last step. See Table 9 for a comparison between these two statuses.
Table 9. The differences between END and STOP.
END
STOP
Main Output
Yes
No
Relay Output
No
No
Alarms
No
No
When a program has come to its end, whether the controller will enter the
END
or
STOP
status depends on the parameter
EO
(Ending Option for Mash Mode) and
bEO
(Ending Option for Boil Mode).
By default, both
EO
and
bEO
are set to OFF, which means that once a program
has ended, there will be no output from the controller. The controller will show
current probe reading in the top window and show “
STOP
” in the bottom window
(Figure 15).
7 9
stop
Figure 15. DSPR320’s display when a program is stopped. All outputs are turned
off.
If
EO
and/or
bEO
is set to ON, the controller will continue to regulate the
temperature if the last step is a temperature-control step, or to regulate power if
the last step is a power-control step. The controller will show the current probe
reading and “
END
” alternatively in the top bottom window. The bottom window
will show the set-value of the last step in the program (in Figure 16, the set-value
is 80). The OUT indicator will show the output status accordingly.
