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Section 2
Operation
Set Alarm Limits
(continued)
Set the Temperature Alarm
Tracking Limit
2-12
Orbital Shaker
The following screen appears and the
present over-temperature alarm setting
flashes.
Change the temperature setting by pressing the up or down arrow. When
set, press any of the three buttons (Time, Speed, Temp) to save the new
setpoint and return to the previous screen or press nothing for about 15
seconds to save the new setpoint and return the display to the Operating
Screen.
Note The Overtemp Alarm setpoint values are calculated from the
hardware and will not include every numerical value between the upper
s
and lower limits.
When the overtemperature setpoint is exceeded by a few tenths of a degree,
the control system will shut the shaker
down by turning off the heaters.
The Overtemp Shutdown warning shown above will be displayed, the
indicator lights will flash and the audible tone (if not turned off) will
sound.
In the alarm state, the audible alarm is muted by pressing the Silence
button, but rings back in about 15 minutes, if the alarm condition is still
present. However, the message and indicator lights persist until the fault is
corrected. Afterward, the remaining relevant alarm components are cleared
by pressing the Silence button.
The Temperature Tracking alarm activates whenever the operating
temperature goes above or below the setpoint temperature by a user
selectable value in the range of 1°C to 20°C. The limit is set at the factory
as 10°C above and below the temperature setpoint.
Note The above and below limits will always be the same value.
To change this limit, open the
Configuration menu by pressing the down
arrow, the up arrow, and the Silence button,
then the down arrow again, in the sequence
shown at the right.
The screen shown below appears
on the display:
Then press the Temperature
button beneath Alarms.
s
3
2
1
Press
Thermo Scientific
4
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