BRIGHT OTF 5000, Инструкция по эксплуатации

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OTF 5000/HS/LS-001/2/3/4 Iss 4 June 2012
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2.1 CABINET CONTROLS
FIG 6
2.1.1 MAINS SWITCH (Located on side panel)
This switch is used to connect the power supply to the cryostat.
Operate this switch to switch the instrument on and off.
2.1.2 LIGHT SWITCH BUTTON
This switch operates the fluorescent lamp, which should be switched off whenever the night
plug is in position.
2.1.3 DEFROST SWITCH (Located on the side panel)
This switch will only activate in conjunction with the defrost clock settings. When on, a heater is
activated which is in contact with the evaporator cooling fins during the defrost cycle and the
switch will illuminate.
2.1.4 DEFROST CLOCK (Located on side panel)
This clock sets the time required for the routine defrosting of the evaporator cooling fins. During
the defrost cycle the clock switches off the refrigeration unit and activates a low power heater,
which clears frost from the evaporator cooling fins. The defrost clock should be set so that it
initiates the defrost at night, and the defrost duration is sufficient to clear the evaporator cooling
fins without the rest of the chamber rising above 0ºC.
Set the 12 hour analogue clock to the current time by turning the clear plastic disc with your
finger. Note that because the defrost needs to run on a 24 hour cycle, make sure that the small
black arrow is aligned with the correct number of the outer ring e.g. if the time is 4.00pm, then
the corresponding number is 16.
The defrost time is set in the factory to start at midnight for 30 minutes, but may be altered by
moving the pins which are around the edge of the clock face. If the time already set provides
inadequate defrosting, it is recommended that a second 30 minute cycle is programmed to
operate several hours later (e.g. at 12 midnight and 6am).
Important: do not increase the defrost time above 30 minutes, as the microtome and chamber
may warm up above 0ºC, causing pools of water to form and subsequently freeze to form ice.
In conditions of high humidity some experimentation may be required to obtain optimal
defrosting (see section 4.5).
Please note that the defrost switch is normally left in the ON position.
There is an override switch on the defrost clock: turning the small black button switches the
defrost cycle on or off.
Temperature Alarm
Fig 5