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c) Eight (8) led lamps Only the selected phase's
(operating mode's) lamp lights
d) A group of 3 buttonsto Select, Check and
Change Settings on the displays
e) One "START CURING" button
When a new Curing Cycle starts, this button must be pressed
for 10 seconds.
f) One green led lamp for the servocontrolled fresh air
damper
When the W.B. thermostat gives the order to the Servomotor
to open, the lamp lights. When there is no order coming the
lamp blinks. When the order is to close the damper, the lamp
is off.
g) One red led lamp for the burner
When the Dry bulb thermostat gives the order to the burner
to fire, the lamp lights.
How VK 981 operates
- To START EACH CURING you press "START CURING".
· To operate MANUALLY the control, you select No. 0
on the SELECTOR.
NOW THE 0-MAN. light is on.
All displays show the actual temperatures in the barn You
can see and set the temperatures (DB, WB, TEMP. INCREASE,
and DT) by pressing the "SETTINGS" button. When
you press "SETTINGS" button all displays show the
setting points. Each time you press again "SETTINGS"
one display at a time flashes. Now you can change the setting
of this display. First DB, then WB, TEMP. INCREASE, and last
one DT.
By activating + or - buttons, setting values go up or down
After 15 seconds the display(s) stop flashing and return to
indication mode (thermometers).
You can cure with TEMPERATURE INCREASE Control and DT Control
together to control perfectly the rate of temperature increase,
or with one or none of them. In case you want to by pass one
control you set - - on the display of the control you do not
want to use (pressing "SETTINGS" and - ).
· To operate IN CURING PHASES mode, you select on the
SELECTOR the desired CURING PHASE (No. 1 for COLOURING, 2
for WILTING, 3 for LEAF DRYING, 4 for STEM DRYING and 5 for
CONDITIONING).
Now the light of the selected phase is on.
Each time you press "SETTINGS" one display at a
time flashes (DB, WB, TEMP. INCREASE, and last one DURATION
in hours). The DB and WB limits, the Rate of TEMP. INCREASE,
the DTsetting and DURATION for each phase are stored in the
computer's memory.
So the DB and WB temperature settings will automatically advance
till the programmed limits and will remain there, waiting
for the operator to change the CURING PHASE when he feels
like doing it.
If the operator wants to slightly change the programmed DB
and WB upper limits of each phase as well as the programmed
TEMPERATURE INCREASE and DT settings, he can do so by selecting
the desired CURING PHASE'S No. on the selector and then press
"SETTINGS" button and change the limits with +,
- buttons (as described in previous paragraph).
In this way the experienced operator can easily adapt computer's
operation to his own technique, making his own program for
each curing phase.
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[pg.2] [pg.3]
[pg.4] [pg.5]
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