Forma Scientific 3546 - Re-Checking the Zero Adjustment; Checking the CO 2 at the Desired Setpoint

Forma Scientific, Inc._____________________________________________Service
6-7
d. Re-checking the Zero Adjustment
 Turn OFF the CO
2
at the supply.
 Open both doors wide for 45 seconds. Close the doors, and allow a minimum
of 15 minutes for the incubator to stabilize and assure a zero CO
2
condition
in the chamber.
 If the readout is greater than 00.4, repeat the door opening for 15 seconds,
and again allow the incubator to stabilize for a minimum of 15 minutes. If
the display is not less than the previous reading, consult the factory. If the
display now reads 00.4 or less, re-adjust the zero pot so the display reads
00.0.
e. Checking the CO
2
at the desired setpoint
 Turn ON the CO
2
at the supply.
 Turn the CO
2
setpoint to the desired level.
 Allow the incubator to reach setpoint and control for a minimum of 30
minutes.
 Check the CO
2
with a FYRITE or similar device until two consecutive
readings agree. If the FYRITE and display are not within 1.0%, consult the
factory.
Note: After proper calibration the CO
2
display will be more accurate than the
FYRITE, because the zero adjustment was made using atmospheric
conditions.
Once the module is calibrated, the Extender Card must be removed and the
CO
2
Control Module returned to its proper position in the incubator panel.
 Turn off the incubator.
 Firmly pull the Control Module rearward until it releases from the internal
connector strip.
 Remove the Extender Card.
 Replace the Control Module into its location in the incubator panel.