Environmental Chamber_________________________________________________________________Start-Up and Operation
Changing the Setpoint
To raise or lower the setpoint, press the Up or Down
Arrow. Temperatures are set in .1°C increments.
3.3 Air Exchange Ventilator Caps
Air exchange for the incubator is regulated through the
manually adjustable intake and exhaust ventilator caps located
on the top of the cabinet.
When viewed from the front of the incubator, the intake
cap is on the left and the exhaust cap is on the right. The venti-
lator caps may be opened by turning counterclockwise, and
closed by turning clockwise.
For optimum performance of the unit, the vent caps should
be closed at all times.
3.4 Heatless Dryer P/N 1900139 (optional)
The optional heatless dryer provides dehumidification for
the incubator chamber. The dehumidify switch must be turned
on for the dryer to operate. The dryer is controlled with the
humidity controller and should operate at 90 psi.
Overtemp Safety Control, Indicator Light, and Audible
Alarm (Figure 3-3)
The overtemp safety thermostat should be set slightly
above the operating temperature of the incubator. In the event
of an overtemp condition, the overtemp safety thermostat will:
• Activate the audible alarm and the overtemp indicator
light.
• Interrupt power to the heaters and maintain the incubator’s
cabinet temperature at the overtemp safety control point.
Note:
The overtemp control is not directly calibrated. The num-
bers on the dial are for reference only.
If an overtemp condition occurs, the alarm can only be
silenced by raising the overtemp safety thermostat setting.
However, the cause of the problem must be determined and cor-
rected before normal operation under the main temperature con-
troller is resumed.
Undertemp Safety Control, Indicator Light and
Audible Alarm (Figure 3-3)
The undertemp safety thermostat should be set slightly
lower than the operating temperature of the incubator. In the
event of an undertemp condition, the undertemp safety thermo-
stat will:
• Activate the audible alarm and the undertemp indicator
light.
• Interrupt power to the refrigeration system and maintain
the incubator’s cabinet temperature at the undertemp safety
control point.
Note:
The undertemp control is not directly calibrated. The
numbers on the dial are for reference only.
If an undertemp condition occurs, the alarm can only be
silenced by lowering the undertemp safety thermostat setting.
However, the cause of the problem must be determined and cor-
rected before normal operation under the main temperature con-
troller is resumed.
3.2 Setting the
Operating
Temperature (Figure
3-4)
The Watlow tem-
perature controller’s
upper numerical dis-
play shows the actual
temperature inside
the incubator chamber.
The lower display shows
the temperature setpoint.
F
I
J
G
H
3 -2
Figure 3-4
