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Astell Autoclaves/Sterilisers – AMB220 | AMB230 | AMB240 | AMB420 | AMB430 | AMB440 | AMA240 | AMA440
SYSTEM CONTROLS
Power Isolator Switch
Turns on AC Mains Power to the system.
This is fitted to the Main Electrical Cabinet.
Marked 0/1.
The “1” position is “ON”.
It illuminates when “ON” when mains AC power is
supplied to the machine.
Cool lock thermostat(s)
There is always at least 1, and optionally up to 3 and they
are sited inside the cabinet panel-work. These sense
chamber temperature and used to restrict opening with
hot fluid loads.
See “safety interlocks” section.
INSTRUMENTATION
These readouts are only displayed when necessary in the
cycle.
Chamber temperature readout
Accuracy better than ± 1.0 °C
Load sensing temperature readout
Accuracy better than ± 1.0 °C
Chamber pressure display
Accuracy Better than ± 0.04 Bar
Chamber pressure gauge
Dial Bourdon pressure gauge at front of machine.
(Accuracy Better than ±5%)
Timing
Various timing functions are displayed on the screen in
MM:SS.
Instrumentation and system checks
In Standby/Ready state - with door closed- the system
displays the current measured variables and the state of
switches, interlocks and services. Any failures are reported
as ALARM conditions.
Alarms
In the event of an instrumentation or sensor problem the
monitor system reports this via the ALARM system.
The ALARM icon flashes RED.
To clear the alarm
Touch the ALARM icon button.
This displays a chronological list of alarms which must be
acknowledged by the user.
Over temperature thermostat
This is sited behind the cabinet.
This takes over control of the heater in the event of water
loss or overheating. It resets automatically when the
temperature falls.
Overheat safety cut-out.
This is fixed (not user adjustable).
This is sited inside the cabinet and cuts out the heater in
the event of excessive temperature rise (typically >150C).
It is only resettable by manual operation when the covers
have been removed.