Brinsea Ovation 28 EX, Руководство по эксплуатации, Страница: 17 / 22

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AF37 US Issue 01
For more specific information on particular species’ requirements check the relevant literature.
Two factors affect incubation humidity: water evaporation within the cabinet (from eggs as well as from additional water) and
levels of ventilation. The water content of the air being drawn through the incubator will also have an effect.
There are two methods available to bird breeders to achieve correct humidity levels:
1
: Monitor humidity levels and adjust to match published guidelines for different species.
2
: Monitor egg weight loss which varies as a direct result of humidity and correct against published weight loss figures
for the species. This is the most reliable method and is recommended – particularly where poor hatch rates are
experienced or if eggs of high value are being incubated.
Eggs lose moisture through their shells and the rate of evaporation depends on the humidity levels around the eggs
and the shell porosity. During incubation eggs need to lose a fixed amount of water which corresponds to a loss in
weight of around 13-16% depending on species. By weighing eggs periodically during incubation it is possible to
monitor and, if necessary, correct humidity levels to achieve the correct weight loss.
For more detailed information on all aspects of egg incubation including helpful advice on getting best results please visit our
website at www.brinsea.com/brochures/BrinseaIncubationHandbook2016.pdf
6 HUMIDITY AND VENTILATION
UNDERSTANDING HUMIDITY
Short term variations in humidity are not important.
The average humidity over the incubation period
needs to be near optimum to achieve the ideal
weight loss.
High humidity for the day or two of hatching is also
important. Beware chronic, excessive humidity.
HATCHING
If the humidity level in the incubator is lower than
the Set Humidity Level the pump will start to turn
(sometimes brief pulses) and gradually draw water
from the tank and pump it to the evaporation card in
the incubator.
This may take a few hours to pump through and
stabilise after which the pump will run intermittently
as the humidity level is controlled.
Typical Humidity:
Generally accepted incubation RH levels for species groups:
During incubation: Poultry 40-50% RH
Waterfowl
45-55% RH
Parrots 35-45% RH
Hatching: All species 65% RH or more
Typical Weight Loss:
Typical ideal weight losses for species groups:
Poultry 13%
Waterfowl
14%
Parrots
16%