Esco CelCulture CO2, User Manual, Page: 29 / 42

19
CO
2
Incubator
3.5 Alarm
The CelCulture CO
2
Incubator alarm system is shown in the table below. When an alarm is active, the error message
appears in the display of the controller. Pressing MUTE button will disable audible alarm for the ring back period. However,
the visual alarm continues until the incubator returns to a normal condition.
Alarm name Condition indicated Alarm Delay Additional notes
Temp sensor
error ADC reading is in overflow or reads less
than 10 counts
No delay
7 seg display will show "---"; heating will
be disabled
CO
2
sensor error
ADC reading is in overflow or reads less
than 20 counts
No delay
7 seg display will show "---"; CO
2
injection will be disabled
O
2
sensor
error**
ADC reading is in overflow or reads less
than 20 counts
No delay
7 seg display will show "---"; N
2
injection
will be disabled
RH sensor
error*** ADC reading is in overflow or reads less
than 20 counts
No delay 7 seg display will show "---"
TC out of cal*
TC sensor is not in the calibrated
temperature range
15 minutes
7 seg display will show "---"; CO
2
injection will be disabled
Over
temperature Temp reading plus calibration offset is
greater than overtemp setting
No delay
Heating is disabled, display shows temp
reading
High CO
2
level
CO
2
reading plus calibration offset is
greater than high CO
2
setting
15 minutes
CO
2
injection is disabled, display shows
CO
2
reading
High O
2
level**
O
2
reading plus calibration offset is
greater than high O
2
setting
15 minutes
N
2
injection will not stop. Display shows
O
2
reading
Door open
Door has been open for over ‘DOOR
ALARM DELAY’ time 1 - 15
minutes
All gas injections and chamber fan stop
without delay. Heating disabled.
Low %RH***
%RH reading plus calibration offset is
lower than low %RH setting
30 minutes Display continues to report %RH as read
Low
temperature Temp reading plus calibration offset is
lower than low temp setting
15 minutes Display continues to report temp as read
Low CO
2
level
CO
2
reading plus calibration offset is
lower than low CO
2
setting
15 minutes Display continues to show CO
2
reading
Low O
2
level**
O
2
reading plus calibration offset is lower
than low O
2
setting
15 minutes
Display continues to show O
2
reading, N
2
injection should be disabled
All CO
2
tanks
low
Pressure switch on both CO
2
tanks
indicate low pressure
No delay Display continues to show CO
2
reading
All N
2
tanks
low*****
Pressure switch on both N
2
tanks
indicate low pressure
No delay Display continues to show O
2
reading
CO
2
tank 1 low
Pressure switch on CO
2
tank 1 indicate
low pressure and no backup
15 minutes
Alert the user to change the CO
2
tank
(approx. 1 week before tank empty).
Display shows CO
2
reading.
CO
2
tank 1
low****
Pressure switch on CO
2
tank 1 indicate
low pressure and backup is installed
15 minutes
Solenoid control automatically switches
to CO
2
tank 2. Display shows CO
2
reading
CO
2
tank 2
low****
Pressure switch on CO
2
tank 2 indicate
low pressure and backup is installed
15 minutes
Solenoid control automatically switches
to CO
2
tank 1. Display shows CO
2
reading
N
2
tank 1
low*****
Pressure switch on N
2
tank 1 indicate low
pressure and backup is installed
15 minutes
Solenoid control automatically switches
to N
2
tank 2. Display shows O
2
reading
N
2
tank 2
low*****
Pressure switch on N
2
tank 2 indicate low
pressure and backup is installed
15 minutes
Solenoid control automatically switches
to N
2
tank 1. Display shows O
2
reading
ULPA reminder
Timer reminder for ULPA replacement
has been reached
No delay
* Only available for units with TC sensor
** Only available for Suppressed O
2
model
*** Only available for units with RH display options installed
**** Only available for units with CO
2
backup options installed
***** Only available for units with N
2
backup options installed