Understanding the unit's light pressure thermal convec�on and "load-effect" are necessary to op�mizing unit performance.
Ar�cle or media processing �mes and/or uniformity are largely dependent on load density and posi�oning. When processing
various loads it's important to remember that the thermostat senses the temperature at the lower part of the chamber where
the heat is generated and the corresponding reading of a temperature se�ng is taken from the top of the chamber with the
installed thermometer. Since loads sit between these two points, load varia�ons such as quan�ty, arrangement, density and
their rela�ve thermal proper�es can temporarily or permanently affect temperature readings.
Process the smallest possible load the applica�on or workload will permit. For best processing of small mul�ples or a single
item, adjust one shelf so that the ar�cle(s) is centered in the incubator.
Avoid placing ar�cles or media against or within an inch of the walls especially on the lower shelf. Heated air from the
lower heat-shield, is designed to travel up the side walls and can have a slightly elevated temperature from set point and
the rest of the chamber.
Avoid the use of large solid trays or foil on lower shelves, this can dras�cally limit heat to shelves and ar�cles placed above.
General Opera�on
Push the illuminated power bu�on to power unit. Rotate the thermostat knob clockwise to approximately the number 6 on
the dial. The heat cycle light will illuminate to indicate that the hea�ng element is energized.
As the unit goes through the hea�ng cycle, observe the thermometer on your incubator. When the desired temperature is
reached, slowly turn the thermostat knob counter clockwise un�l the heat cycle indicator turns off. The temperature will
con�nue to rise slightly due to latent heat from the hea�ng element, but eventually achieve thermal equilibrium.
Check the thermometer to see if any minor adjustments to the thermostat should be made. With any subsequent adjustment
allow �me for chamber to achieve a steady state before determining if the desired set temperature has been reached. To
maintain a frequently used temperature, leave the thermostat knob at its set point number and use the power bu�on to turn
the unit ON or OFF.
IMPORTANT:
Se�ng the unit's temperature with an empty chamber helps to establish a useful correla�on between the unit's performance
(hea�ng capacity) and proper processing of various chamber loads and densi�es (load-effect).
See Performance and Chamber
Loading and Important Operational Notes.
Performance and Chamber Loading
Important guidelines to chamber loading and processing:
Load the incubator so that air circula�on within the chamber is not impaired.
Avoid extremely large (in quan�ty or size), or high-density loads
( FIG. 8 ON PG 4).
This will show by non-uniform processing
and long or impossible "heat-through" �mes. To help determine a large load's suitability, use the set-point recovery �me
(the �me it takes for the temperature to recover to the original set temperature once load is placed), as a guide.
Leave a space between ar�cles on shelf.
It is important to note that large trays placed on lower shelves prevents enough heat to rise within the chamber.
Thermometer readings can give a false indica�on that the temperature se�ng is too low. Higher temperature adjust-
ments made as a result of these readings could overheat lower placed ar�cles or media.
(FIG. 7 ON PG. 4)
IMPORTANT:
To reduce recovery �me, reduce load propor�onally. Also, large loads such as a beaker containing 2 liters of solu�on may
require an elevated set temperature for the solu�on to reach and maintain a lower target temperature. When possible,
measure large loads or solu�on temperatures directly with an ancillary thermometer or probe.
Probes can be inserted at
top port.
Stagger ar�cles from those on lower shelves in a "V" forma�on.
(FIG. 6 ON PG. 4)
PAGE 3
Allow unit to cycle empty for a minimum of 20 minutes to allow the interior chamber to reach a thermal equilibrium.
