Filling Humidity Pan - Thermo Scientific 3110 Operating And Maintenance Manual

Section 1
Installation and Start-Up
Filling Water Jacket
Disconnect the silicone tubing from the fill port, and replace the fill port
plug removed above.
(continued)
Warning Once the jacket is full, be certain to clean up any water that may
have dripped down the side of the unit or spilled onto the floor during this
process to prevent a possible slip hazard.
s

Filling Humidity Pan

Caution Use of chlorinated water, or decontamination products containing
chlorine, will deteriorate the stainless steel and cause rust, voiding the
warranty.
s
Fill the humidity pan to within 1/2 inch of the top with 0.8 gallons (3
liters) of water, as described in Filling Water Jacket. If the water cannot be
sterilized, a 2% solution of quaternary ammonium can be used as a
disinfectant additive to control bacteria and other organic contaminants, if
desired. Place the pan directly in the center of the incubator floor to
ensure optimum humidity and temperature response.
For applications requiring higher humidity conditions, the pan should be
placed against the left side wall of the incubator. The ductwork has been
designed for this purpose. This will also accelerate humidity recovery after
door openings. Even higher humidity conditions can be achieved by
removing the humidity pan altogether and adding water directly to the
bottom of the incubator chamber, being careful to not fill it any higher
than the bottom edge of the silicone door gasket. Also the chamber gas
sample port (Figure 1-1) may be capped to assist in achieving greater RH.
In some ambients, this may cause condensation to form in the chamber.
Warning Wipe up any excessive condensation to prevent it from dripping
onto the floor creating a possible slip hazard. For stacked incubators, this
may also include the drip channel (just behind the face of the control
panel drawer) on the bottom unit used to direct water away from the
electronics drawer.
Warning When the humidity pan is in place, be certain to clean up any
water that may have spilled in the unit or onto the floor during this
process, to prevent a possible slip hazard. For stacked incubators, this may
also include the drip channel (just behind the face of the control panel
drawer) on the bottom unit, used to direct water away from the electronics
drawer.
s
Caution Check the level and change the water frequently to avoid
contamination. Do not allow the water level to fluctuate significantly.
"Dry-outs" will have an adverse effect on the humidity level as well as CO
2
calibration.
s
Thermo Scientific Water Jacketed CO Incubator 1-11
2