Forma Scientific, Inc._____________________________________________Service
6-5
CO
2
Control Module showing the Extender Card
and Span Adjustment Pot Location
Figure 6-1
a. Stabilizing the Incubator at operating temperature and humidity
with no CO
2
in the chamber.
Turn OFF the CO
2
supply at the source.
Fill the humidity pan with sterile distilled water.
Allow the chamber temperature and humidity to stabilize. This will take a
minimum of eight hours if the temperature setpoint has been recently
changed. Allow three days on initial start-up.
Turn the span pot counterclockwise 10 turns. (Refer to Figures 6-1 and 6-2.)
b. Adjusting the Zero Pot
Using the calibration screwdriver, adjust the CO
2
control zero pot to read
00.0 on the digital display.
Wait 5 minutes, and repeat as necessary until the display is stable.
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