Poultry House Control
74
when the temperature is below the Happy
Zone according to the delay times.
d. Heater Temperature Band
: heaters
actually turn off at the heat temperature
specified in Control, Temperature Curve,
and turn on at the Heat temperature minus
the heater band. This becomes the heater
Happy Zone.
e. Cool Down Factor, %
: If actual
temperature is above the Happy Zone, the
temperature must come this fraction of the
difference towards the Happy Zone within
one increase level delay, or the Platinum
Plus will increase ventilation level to the
next level.
f. Cool Down Fast Response
: if
temperature drops faster than this number
of degrees per minute, the Platinum Plus
decreases ventilation one level even if
temperature is above the happy zone. The
controller anticipates that at this rate of
temperature decrease, it will likely
overshoot the happy zone.
g. Non Brood Area Differential From
Target: this parameter sets temperatures
for heaters that are not part of the active
growing zone. You can use this to preheat
or set temperatures in these areas. The
temperatures will be this differential
below the target temperature.
2. Radiant Heaters
a. Radiant Low, Differential From Heat:
this parameter adjusts the on and off
temperatures of all radiant heaters relative
to the Heat Temperature Curve. If it is
zero, the low level radiant heaters operate
identical to the usual heaters. To make the
differential negative, press the +/- key
after entering the quantity.
b. Radiant High, Differential Below Low
Radiant Heater Set Point: the high level
radiant heaters initially turn on together
with the low level radiant heaters and the
corresponding ignition relays to ensure
proper ignition, irrespective of other
temperature settings. However, if
temperature is low, the high level radiant
heaters turn on again this amount below
the low level heaters and continue to
operate for the Heater Temperature Band
or heater Happy Zone. Using Heater, Low
Level Radiant and High Level Radiant
outputs you can have up to three different
levels of heat in each zone. Example
Calculations:
i. Heat Temperature from Temperature
Curve: 90.0ºF
ii. Heater Temperature Band or Happy
Zone: 1.0ºF
iii. Radiant Low Diff 2.0ºF, Radiant High
Diff 2.5ºF
iv. THEN: at 91.0ºF Low Level turns on
with temporary
support from High Level
and Ignition and turns off at 92.0ºF. The
High Level also turns on at 89.5ºF,and
turns off at 90.5ºF
c. Radiant Ignition Time (seconds)
: length of
time high level radiant heater and radiant
ignition relay stays on to help ignite low level
radiant heater.
3. Ventilation Levels
a. Maximum Ventilation Levels: enter the last
ventilation level programmed. You need not
use all 30 available levels.
b. First Tunnel Level
: enter the first tunnel
level number. Tunnel levels are marked with
a T in the ventilation level menu, and with
distinctive color on the PC screen in the
PlatiNet communication software. Note that
differential temperatures at each level in the
ventilation table are relative to the target
temperature when not in tunnel, and relative
to the tunnel temperature in tunnel.
c. Maximum Fans on Switch To Tunnel
: this
is the maximum number of tunnel fans
allowed to run during the switch into tunnel
ventilation.
d. Tunnel Exit Differential Below Tunnel
: the
controller enters tunnel at the tunnel
temperature specified in Control,
Temperature Curve. It cannot exit tunnel until
this amount below that temperature. This
differential must be positive, and is subtracted
from the tunnel temperature.
e. Tunnel Exit Outside Temperature
Differential Above Tunnel: The controller
can not exit tunnel until outside temperature
is cooler than this temperature. To disable this
feature, enter a large value and press the +/-
key to change the differential to a large
negative number.
f. Increase Level Delay Time
: this is the
normal minimum length of time the Platinum
Plus waits before increasing ventilation levels
once the temperature is above the Happy
Zone. If the temperature returns to the Happy
Zone, or satisfies the Cool Down Factor in
Control, Temperature Curve, Help | Set
, the
ventilation level does not increase.
g. Decrease Level Delay Time
: this is the
normal minimum length of time to wait before
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