Shellab SCO2W-2 - Manual (Page 11)

11
humidity is obtained. Do not use plastic, glass or other metals. Only 300 series stainless metals are
acceptable for this reservoir pan. Do not use corrosive chemicals including copper sulphate or
chlorine in the pan or chamber as damage may occur. Use Distilled Water Only. DO NOT USE
DEIONIZED WATER!
Use of disinfecting chemicals in the pan can change the surface tension of the reservoir water thus
preventing evaporation and proper humidification of the chamber. Water in the pan should be
changed and the pan cleaned at least once a week to help control contamination and to maintain
proper surface tension.
5.6 Temperature Monitoring: To insure that the incubator is operating at the desired temperature, an
accurate temperature indicator such as a certified reference thermometer should be placed in the
incubator chamber. Try to place the thermometer in the center of the chamber and spaced off the
shelf (taping the thermometer down to a petri dish cover is a method that raises it off the shelf and
prevents it from rolling and hiding the scale from view). For ease of reading the thermometer would
be better if they were electronic with a remote display so they could be read without opening the
doors.
5.7 Initial Control Settings: Set controls to the set point you want your incubator to operate at.
A. Set the OTP to its maximum position clockwise. After making initial control settings allow
the incubator to warm up and stabilize for 24 hours.
B. All units are shipped set for 37

C and CO
2
OFF. If other conditions are desired follow the
instructions in Section 5.3 for resetting the controls.
5.8 Temperature Calibration: It is important that the calibration be performed in the following order:
Main temperature, and then the Over Temperature Safety.
A. During main temperature calibration it is important that the inner glass door not be opened
for any reason, and that the outer heated door be opened as little as possible.
B. After the incubator has been running for 24 hours and the temperature display is stable at
the set point, read the temperature in the chamber from the reference thermometer, and if
necessary, recalibrate the display using the instructions in Section 5.4.
C. After the main temperature display has restabilized and maintained set point for several
hours, check the actual temperature again. If it does not match the display repeat the
calibration.
D. After the Main Temperatures are set and adjusted, the Overtemperature Safety Control
needs to be set. Do this by turning the OTP Control Knob counterclockwise until the
Overtemperature Light comes on (this will blink in sequence with Heating Activated Light).
Next, slowly turn the knob clockwise until the light goes off, then turn the knob another 8
degrees approximately. This should set the Overtemperature 1 degree above the Main
Temperature set point.