To achieve this they have redesigned the entire control board
as well as the main circuit board. The KN-8828P is available as a complete roaster,
but Hottop has gone to great lengths in the design of this new model to be sure
that current owners of a Hottop coffee roaster will be able to upgrade their
roasters to the "P" model by replacing the control panel and the main
board, both of which will be available as an upgrade "kit" for purchase.
Complete instructions for the replacement procedure are available in PDF format
HERE on the Hottop
USA website.
The control panel has been totally redesigned, now sporting an advanced LCD
display which serves as the programming interface as well as giving the user
full telemetry readout during the roasting process. For those just learning
about roasting coffee there is an "Auto" mode that roasts the coffee
much like the previous models have, but the KN-8828P also adds up to ten roasting
profiles. The first is pre-programmed by the factory. The remaining 9 profiles
can be programmed by the user and saved for use at a future time in the non-volatile
memory.
Program "0" is set from the factory and cannot be
changed, but the consumer can program up to nine of their own profiles offering
the ability to create coffee just the way they like it as never before. Each
of the nine programs can have up to 8 roasting segments, and each of those segments
can be individually programmed for time and temperature as well as fan speed.
Additionally, the user can modify any single portion of a program they have
already created without having to re-enter the entire profile or segment.
With the ability to create that many custom roasting profiles,
the KN-8828P can be set up to cover just about any roasting need. Use program
1 for espresso, program 2 for the Colombian that Mom loves so much, program
3 for that dark roast for Dad, and six more to make the machine work just the
way you want. It is also easy to keep track of the various profiles because
the user can add their own three-character, alpha-numeric designation.
To further assist the user, animations have been added to
the control panel.
Screen animation on LCD reminds user that chaff tray needs to be emptied before
roast can begin. In the lower left-hand corner (4 in the display image shown
above), various animations remind the user of tasks that need to be completed.
Prompts include emptying the chaff tray (shown here) adding beans, or eject
and cool-down mode is in progress. When an alarm goes off a quick glance at
the display lets the user know what to do.
Among various safety features is the fact that the chaff tray needs to be removed
from the machine for emptying or the next roast cannot begin, even if the machine
has been unplugged.
Besides the animations on the message center, the lighting
on the LCD screen changes depending on which mode or function is in use to alert
the user.
This Graph created from data gathered during an actual roast
compares the temperature reported by the KN-8828P's LCD display to the actual
bean temperature taken with a separate probe inserted into the roasting chamber.
Another safety feature helps keep the user from ruining a roast. When bean temperature
reaches 414 F, the machine will signal the user by beeping for thirty seconds.
This warns the user that the beans are approaching the point where they may
be burnt or even ignite. During this thirty-second warning period the user MUST
press the "Enter" button. If the button is not pressed the machine
will automatically eject the beans into the cooling tray.
[NOTE: This is an enhanced image of a prototype panel taken
during pre-production testing showing the factory "Program 0" in operation.
Production model will be more clear and easier to read.]
1 - Countdown timer to show total amount of time left in the current roasting
process.
2 - Current roasting chamber temperature.
3 - Fan state and relative speed (fan is off in this picture)
4 - Current state (Roasting, Plus Time, Cooling, etc.).
5 - Eight programmable roasting segments will be available to be programmed.
These bars show the portion of the programmed temperature which has been achieved
for the programmed temperature for that segment.
6 - In the same way the vertical bar shows temperature progress, these four
squares show how the programmed time for the current segment is progressing.
Each one indicates 25% of the time for that particular segment. Here you see
that this segment is at about 50% of the programmed time.
7 - This time display shows the amount of time left for the active segment.
8 - This bar represents the user's programmed temperature for that segment.
Specifications subject to change without notice.
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