Poultry House Control
70
your installation, enter the maximum level
programmed here.
b. First Tunnel Level
: switching into and
out of tunnel ventilation is a major change
in ventilation. For tunnel ventilation, enter
the first tunnel level here. The controller
takes special precautions when entering
tunnel, and logs this event in the Table of
Events under the History Menu.
c. Maximum Fans on Switch to Tunnel
:
you can limit the number of fans running
during the switch to tunnel ventilation.
d. Tunnel Exit Differential Below Tunnel
:
this parameter sets amount below the
tunnel entry temperature at which to exit
tunnel ventilation. Tunnel temperatures
are determined by the sensors specified in
Temperature Definition. Entry and exit is
also controlled by these sensors. The
controller can not exit tunnel until the
tunnel temperature is this much less than
the tunnel entry temperature. It must be a
positive number.
e. Tunnel Differential For Outside
Temperature to Exit Tunnel: set the
relative temperature for the outside sensor
at which to exit tunnel. The controller can
not exit tunnel until the outside
temperature is less than tunnel
temperature plus this differential. This
number can be positive or negative. To
eliminate the effect of this parameter on
tunnel exit, enter a large positive number
such as 90.0.
f. Increase Level Delay Time
: This is the
standard minimum delay before
increasing ventilation levels.
g. Decrease Level Delay Time
: this is the
standard minimum delay before
decreasing ventilation levels. The Cool
Down Fast Response parameter (see
Control, Temperature Curve, Help | Set)
can accelerate ventilation level decrease if
the temperature drops more than the
specified amount in one minute. Also, if
the average temperature reaches the Heat
temperature, the control goes immediately
to the minimum level allowed in Control,
Min/Max Levels. Finally, if the Min Vent
if Heater On parameter (see Control,
Temperature Curve, Help | Set) is set, any
heater turning on automatically in the
active growing area forces an immediate
change to the minimum level.
h. Fan Cycle Time
: this parameter sets the total
fan cycle time so that you can enter only the
ON time in the Ventilation Table itself. If you
prefer to enter both the ON and OFF times,
rather than letting the Platinum Plus calculate
the Off times, set this parameter to 0. The Off
column will replace the variable speed
column in the ventilation table.
i. Tunnel Exit Delay (minutes)
: the Platinum
Plus waits for this time after satisfying tunnel
exit conditions.
Curtain Levels, Precision Mode
The Curtain Level table corresponds level by
level with the Ventilation Level table. Set the
target curtain levels for the Tunnel curtain, or
Tunnel and Natural curtains if you use natural
ventilation for each level. Options regarding
use of pressure in tunnel ventilation are in the
Control Menu | Pressure | Help | Set.
System Parameters:
1. Number of Stages for Calibration: to ensure
accurate positioning of the curtains, the
Platinum Plus may periodically calibrate the
curtain position. This parameter sets the
maximum number of curtain movements or
stages between calibrations. Calibration consists
of forcing the curtain to the nearest limit, 0% or
100% with adequate overtime to ensure
reaching the limit switch. Then the curtain
returns to its proper position. In the event
several curtains require calibration, they
calibrate one at a time to reduce the amount of
restriction to normal ventilation. The stage
counter resets automatically each time the
curtains reach a limit point to prevent excessive
calibration
2. Stop Fans, curtain Move (total %)
: sets the
curtain opening up to which fans will stop
temporarily when any curtain moves. The term
‘total %’ means that the sum of all conventional
curtain openings plus the tunnel curtain must
total this amount. For example, 3 curtains at
20% each totals to 60%, as does 2 curtains at
0% and one at 60%.
System Parameters, Standard Mode
1. Temperature and Timer Settings
a. Minimum Tunnel Fans On: The Platinum
Plus refuses to enter tunnel if there are not
enough tunnel fans available. It may override
individual fan settings in order to operate the
minimum number of tunnel fans when in
tunnel mode
b. Tunnel Exit Delay (Minutes)
: the Platinum
Plus waits for this time after satisfying tunnel
exit conditions..
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