NEW BRUNSWICK SCIENTIFIC CO-150, Manual To Operations

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25
New Brunswick Scientific User’s Guide
2. Press the
◄
key and the
▲
&
▼
keys to adjust the Alarm Arming time
(as you scroll through the available choices, you will see 0.15 Hr, 0.20,
0.30, 1.00, then OFF).
3. Press
◄
to select the desired value.
Press
∗
to return to the main alarm programming menu, and press
∗
again to
return to the main display.
NOTE:
When alarm delay is set to OFF, the Alarms will arm only when the
programmed setpoint is reached.
3.7 Chamber Alarm System
When the incubator is switched
ON
, or after any values have been reprogrammed, the
Alarm System is inactive until the setpoint values (± 0.1) are achieved, after which
the Alarm System is armed.
See Figure 4, Chamber Alarm System Flow Chart , on
the following page.
If temperature and/or CO
2
levels deviate more than the programmed amount, the
display flashes, the audible alarm sounds and a message appears on the screen. You
can acknowledge (and cancel) the alarm by pressing any key.
When the inner door is opened, the Alarm System is disabled. When you close the
door, the preset Alarm Arming Delay starts. When the delay time expires, the Alarm
System is rearmed; if the temperature and/or CO
2
fall below or above the alarm
setpoints, the alarm will be activated. If chamber conditions recover within the
Alarm Arming Delay time, the Alarm System will be rearmed but no alarm will be
activated.
If an alarm is not acknowledged but the chamber conditions subsequently recover, the
audible alarm will be cancelled but the alarm message will remain on the screen to
alert the user to the fact that an alarm has occurred. You can cancel this alarm
message by pressing any key. The duration of the audible alarm can be adjusted from
inactive to continuous (s
ee Section 3.6.4 above ).