NEW BRUNSWICK SCIENTIFIC Innova CO-170, Manual To Operations

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27
New Brunswick Scientific User’s Guide
2. At the end of the countdown, the control system adjusts the AutoZero
Factor to reference the sensor to 0.05% CO
2
, which is the approximate
atmospheric level.
3. The pump switches off and the chamber atmosphere diffuses back into
the sensor’s measuring chamber. This takes three minutes, after which
the normal CO
2
control system takes over.
4. The result of the AutoZero (listed as A/Z on some screens) is sent to the
DATALOGGER ALARM EVENTS
screen so that a record of the results will
be kept.
The frequency of AutoZeroing can be set in steps between once a day and
once every 28 days, which is the default setting. If not required, it can be
disabled (
see Section 3.6.6 ).
The default time setting is 7:00 am. This can be altered to suit your
requirements. We do recommend that you only change the time setting
shortly before you start to use the incubator.
If the AutoZero function is to be run manually, simply press the
START
function key, within the
PROGRAM CO
2
AUTOZERO
window.
NOTE:
The AutoZero will only occur if the temperature is at setpoint. If the
temperature is not at setpoint, the system will postpone AutoZero
until the setpoint is achieved.
3.6.4
DATALOGGER
See Section 3.7 for detailed information.
3.6.5
POWER FREQUENCY
You can adjust the power frequency to either 50 or 60 Hz to match the local
electrical supply.
3.6.6
DISABLE
This feature allows you to inform the control system to ignore certain
sensors if their function is not required. The standard item on this menu is
the
CO
2
PRESSURE SWITCH
(for AutoZeroing). Additional Disable Options
appear on this screen according to the options installed on your incubator.
See Section 7.1 for available options.
To disable a feature, scroll to
OFF
using the
W
&
X
direction keys, then
press the
ENTER
function key.