MJ1023 GB Issue 01
11
Of the two methods given above the most reliable is egg weight method and is recommended
–
particularly where poor hatch rates are experienced or if eggs of high value are being incubated.
Alter the setting of the ventilation control (reduce ventilation to increase humidity) to change the
humidity level. Humidity levels may be decreased by cutting the evaporation block in half to reduce its
surface area. Additional evaporating blocks may be purchased from Brinsea Products at the address
at the end of these instructions.
8.3
In all cases the humidity for hatching needs to be high. Because of the short duration involved
water/weight loss will not be significantly affected. High humidity is necessary to prevent membranes
drying and hardening before the hatch fully emerges. Humidity will naturally increase as the first eggs
begin to hatch and internal membranes begin to dry. This effect is in addition to the increased area of
water evaporation from the evaporation block.
8.4
During hatching the high humidity levels will fall dramatically when the door is opened and will take
some time to build up. Resist the temptation to open the door frequently
– leave for at least 6 hours
between inspections.
8.5
The Brinsea Advance Humidity Pump is available as an option on the Ova-Easy Advance incubators.
The incubator digital control system not only reads the humidity in the incubator but it provides a
control signal to operate the water pump and accurately maintain the humidity level at the desired
level. Visit www.brinsea.com for more information.
Advance Humidity Pump.
8.6
The water tube for the Advance Humidity Pump fits through a hole at the base of the door frame by
the hinge as shown:
Pass the rigid water tube through the hole and push it into the evaporating block. Please refer to the
operating instructions supplied with the Advance Humidity Pump for fitting details.
INCREASE VENTILATION
REDUCE VENTILATION