Thermo Scientific 3881, Руководство по эксплуатации и техническому обслуживанию

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7033881 Blood Bank 3-1 Thermo Scientific
Section 3
Operation
The Performance Monitor/Alarm is microprocessor controlled and
monitors the high and low temperatures of two, in-cabinet temperature
probes, sounding a tone and flashing warning lights when preset limits are
exceeded. The unit alerts the operator when a door is held open for more
than 30 seconds, and sounds a tone when main electrical power is
disrupted. A built-in counter also records the number of door
opening/closing cycles during a 24-
hour period. The count resets each
day at midnight.
Nine alarm occurrences are stored in
the monitor’s memory and may be
reviewed at any time by the
operator. High or low temperature
extremes are displayed along with
day, month, and time information.
The monitor control panel uses a
two-line liquid crystal (LCD), alpha-
numeric display and four pressure-
sensitive, data entry keys or buttons
which make a “click” when pressed.
The three buttons beneath the display are unmarked. Their functions are
identified in the LCD line above them, and change with the various
operating functions of the alarm/monitor.
The SCROLL button is used when programming the unit.
Note
The
center button is used to silence the audible alarm. ▲
Operating the
Performance
Alarm/Monitor
Figure 3-1. Alarm/Monitor Control Panel