Model 3911/3913______________________________________________________________________Start-Up and Operation
Press the Mode key to scroll through the menus until the
upper and lower displays show “2 Loc” (Figure 3-11). Press the
down arrow key until the 2 becomes 0 (zero) as shown in
Figure 3-12.
Press the Display key to return to showing the setpoint and
actual temperatures. All safeguards are now removed and the
controller may be programmed. Refer to the Watlow publica-
tions included with this operating manual.
Reprogramming the temperature or humidity
controllers will change the factory default
settings and may seriously alter the performance
of the incubator and void the warranty. Contact
the Thermo Forma Service Department, at 1-888-
213-1790.
3.5 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.
3.6 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.
a. Removing the mechanical lockout
Make sure the unit is turned
off.
Wearing a grounding wrist
strap or maintaining constant con-
tact with the metal cabinet, press
in the four locking tabs on the
frame of the Temperature con-
troller. There are two tabs on
either side as shown in the front
and side views in Figure 3-7.
When all tabs are unlocked, pull
the controller module out of its frame.
Looking at the top of the module, locate the red DIP switch
indicated in Figure 3-8. With a fingernail or small screwdriver,
turn off SW #2 by moving the
white toggle down or towards
the front of the module. (SW#2
is the top switch when looking
at the module from the right
side.)
Very carefully, replace the
module into its frame and press
firmly on the top and bottom of
the bezel until all four locking
tabs “click” into place.
b. Removing the Software Lockout
Press the up arrow and down arrow keys at the same time
and hold them for about three seconds. The words “inpt”
(input) and “set” will appear in the top and bottom displays.
(Figure 3-9) If numbers in the bottom display begin to scroll up
or down, the keys have not been pressed simultaneously. Try
again.
Press the up arrow until “gLbL” (global) appears in the
upper display. The word “set” will remain in the lower display.
(Refer to Figure 3-10)
Press
Press
Press
Press
Press
Press
Figure 3-7
DIP switch
Top of controller module
SW#1
SW#2
Figure 3-8
Press
(3 sec)
Set
Input
Press
Set
Global
Figure 3-9
Figure 3-10
Press
Lock
2
Press
Change
2 to 0
Figure 3-11
Figure 3-12
3 - 3
