MANUALP/4000_SERVICE_0712 July2012
8
NB: The lowest temperature performance is only achievable in a maximum
ambient of +20
o
C
NB: If fitted with a HEPA filter, the spatial specification is downgraded by a
further ± 0.4
o
C
b) Relative Humidity -
With the standard tray of water inside a standard cabinet the humidity will
typically rise to 80% RH or more at a temperature of 37.0
o
C. The
maximum achievable humidity will be less in a Tropicool or Cooled
cabinet.
NB: On COOLED units the supplied stainless steel water tray should be placed
on the cabinet floor and pushed so that the sloping side firmly touches the rear
wall.
c) Carbon Dioxide:
Range: 0.5 - 20 % CO
2
Fluctuation (@35Kpa / 5PSI) ±0.2% CO
2
Accuracy: (@37oC, 85% RH) ±0.5% CO
2
CAUTION: This chamber has been fitted with a SPECIAL UVC Sterilising lamp
located behind the stainless steel rear duct. Note that this ULTRA-VIOLET
lamp is HARMFUL to the eyes and MUST NOT be viewed directly or indirectly
for any period.
The lamp is automatically turned OFF when the outer door is opened and turns
on for 5 minutes when the outer door is reclosed.
If for ANY reason the glow from the lamp can be seen when the outer door is
opened, the cabinet must be turned OFF and the cause investigated by a
qualified service engineer.
SPECIAL NOTE for COOLED incubators
COOLED chambers may be fitted with a ‘FRIDGE’ switch located on the RHS
monitor panel. If fitted, this switch allows the user to turn the refrigeration
system OFF when operating at higher temperatures and low ambient condition
(for example at 37
o
C in an air-conditioned room).
If the ‘FRIDGE’ switch is turned ON or OFF when the chamber has stabilised at
temperature, the control temperature may be disturbed for a short period while
the chamber re-stabilises at the new load setting.
When operating at 37
o
C in an air-conditioned room, it is recommended to
set the ‘FRIDGE’ switch to OFF.
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