Shel lab SCO5W, Installation & Operation Manual

Page: 28 / 62

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CONTROL PANEL OVERVIEW
CO
2
Display
Labeled Set CO
2 ,
this display shows the concentration of CO
2
as a percentage of the incubation
chamber atmosphere. The display has a range of OFF (0%) to 20% and an accuracy of 0.1%. The
display shows “LO” until the CO
2
sensor registers a concentration in the chamber greater than 0%. A
few minutes of CO
2
injections may be required when initially starting the unit.
The Up and Down buttons are used to change display modes and then input either a new gas
concentration set point or a calibration adjustment. The display blinks continually while in its set point
or calibration adjustment modes, preceded by an “SP” for Set Point or “C O” for calibration offset.
Red LED alarm indicators marked High and Low illuminate whenever CO
2
deviations of ±1% or greater
from the set point take place. The yellow LED marked Mute illuminates whenever an audible deviation
alarm is being muted. See the
Muting the Audible CO
2
Alarm entry on page 38 for more information.
Marked CO
2
Injecting, this green indicator illuminates while the incubator is injecting CO
2
into the
incubation chamber. Injections are accompanied by a clicking sound that is the CO
2
solenoid opening
and closing.
Humidity Display
Marked Set Relative Humidity %, the humidity display shows the current humidity inside the chamber
as a relative percentage accurate to 1%.
The red indicator marked Water Jacket low illuminates when the water level of the jacket has fallen
to a level that impacts the incubator temperature uniformity and stability. Add water to the water
jacket as soon as this light illuminates. Fill until the light turns off. See page 23 in the Installation
section for instructions.