Model 3911/3913
_________________________
Ul"'calHlLlVll
and Set-Up
2.5 Start-Up
When the humidification system is operational, the incuba-
tor
may
be started. Preset the controls as follows:
Overtemp Safety Thermostat
............
Fully Clockwise
Undertemp Safety Thermostat
......
Fully Counterclockwise
Main Power Switch
..............................
ON
Humidity Controller
...................
Desired Setpoint
Temperature Controller
.................
Desired Setpoint
Door Heater
........................
.40% (factory set)
For best overall performance
of
the incubator, the refrigera-
tion switch should be turned on for most applications. When
running
Low
or No humidity at high temperatures, the refrigeF
ation switch
may
be turned off.
&/1\
The defrost switch must be turned on when the
• temperature setpointis lOoC, or below.
2.6 Setting the Overtemp Safety Thermostat
Allow the chamber temperature and humidity to stabilize
then
set
the overtemp safety thermostat as follows:
1.
Tum
the overtemp control knob slowly counterclock;-
wise
until the audible alarm sounds and the overtemp
indicator lights.
2. Tum the overtemp control knob clockwise approximate-
2.7 Setting the Undertemp Safety Thermostat
Allow the chamber temperature and humidity to stabilize,
then set the undertemp safety thermostat as follows:
1.
Tum the undertemp control knob slowly clockwise until
the audible alarm sounds and the undertemp indicator
lights.
2. Tum the undertemp control knob counterclockwise
approximately
two
units on the scale. The alarm should
be silenced and the undertemp indicator light should go
out.
The undertemp safety thermostat
is
now set a few degrees
below the control temperature setpoint. When the chamber tem-
perature drops to
the
undertemp control point, the alarm system
will activate, power
to
the
compressor will shut off, and the
chamber temperature will be maintained at the undertemp
con
trol point.
When an undertemp condition occurs, the cause
must
be
determined and corrected before normal operation under the
main temperature controller can be resumed.
Note: When the chamber temperature control setpoint is
changed, the undertemp safety thermostat must be reset to
accommodate the change.
2.8
Preparing
the
(Optional) CoBex Recorder
a.
Installing
the
Battery
~y
tw(Lunits
on
the scale. The alarm should
h~lenced~~~~~~~
_
_._-
.----.--------.--
....
---~:
:
and
the
overtemp indicator light should go out. The
overtemp safety thermostat is now set a few degrees
above the control temperature setpoint.
When the chamber temperature rises
to
the overtemp corr
trol point, the alarm system will activate, power to the heaters
will shut off, and the chamber temperature will be maintained
at the overtemp control point.
When an overtemp condition occurs, the cause must
be
determined and corrected before normal operation under the
main temperature controller can be resumed.
Note: When the chamber temperature control setpoint is
The seven-day circular chart recorder
-Is
located on the
front
of
the incubator cabinet and is protected by a glass door.
slotted
screws
(loosen
only)---------,
press
to
change
chart
time
line
groove
changed, the overtemp safety thermostat
must
be reset to
accommodate the change.
Figure
2-3
2-3
