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CB / CB-UL, CBF / CBF-UL (E7) 07/2021 Page 67/197
6.3 Factory settings
The chamber is supplied with the following basic preset parameters:
• Temperature setpoint 37 °C / 98.6 °F
• CO
2
setpoint 5 vol.-%
• O
2
setpoint (chamber with O
2
control) 21 vol.-%
• Humidity setpoint (CBF / CBF-UL) 93 % r.h.
• Safety controller class 3.1 Offset 2 °C
• Sterilization temperature (Set-point) 180 °C / 356 °F
• Audible alarm signal (buzzer) activated
The set temperature determines the target working temperature in the inner chamber, i.e. set value 37 °C
/ 98.6°F = target working temperature 37 °C / 98.6°F. The same is valid for the CO
2
and O
2
concentration
(chamber with O
2
control) and humidity (CBF / CBF-UL). For the hot-air sterilization, the set value is 180 °C
/ 356 °F and cannot be changed.
As long as there is a difference between the actual and set value shown in the display,
adequate operation of the chamber is not guaranteed.
6.4 Equilibration time
Temperature
• Equilibration time is max. 4 hours.
CO
2
• After turning in the chamber, after approx. 5 minutes the CO
2
concentration equilibrates automatically
to the pre-set value of 5 vol.-% CO
2
.
• Equilibration time is max. 0.5 hours.
O
2
(chamber with O
2
control)
• After turning in the chamber, the ambient oxygen concentration of approx. 20.9 vol.-% is displayed after
a delay of 10 minutes. During the first 10 minutes, O
2
control is not defined. Then O
2
is regulated to the
displayed setpoint value of 21 vol.-%.
• For high O
2
setpoint values (with alternative control range option), equilibration time is max. 1.5 hours.
Humidity (CB / CB-UL)
• With humidity control effected via the Permadry
®
system equilibration time is max. 15 hours
Humidity (CBF / CBF-UL)
• Equilibration time is max. 1 hour.
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