Techne DB-2TC - Manual (Page 25)

SETTING THE OVERTEMPERATURE CUT-OUT
DB-2D
Since there is no user-adjustable cut-out, in the event of a fault occurring which could cause the heater to
remain on, power is removed from the heater when the block temperature reaches approximately 110°C.
DB-3D
An adjustable overtemperature cut-out is fitted to these units. As supplied it is set to remove power from
the heater should the block temperature exceed approximately 210°C. If you need to prevent the block
temperature exceeding a lower value, the overtemperature cut-out may be re-adjusted downwards.
Note that the cut-out should be set to trip at least 5°C above the maximum desired operating
temperature.
To set the overtemperature cut-out, turn the reset button (located on the back panel of the unit) fully
clockwise then:
either: • Heat the block to the desired cut-out temperature and turn the reset button anti-clockwise
until the unit just cuts out.
or: • Heat the block to the required maximum operating temperature and turn the reset button
anti-clockwise until the unit just cuts out. Now turn the reset button an additional small
amount clockwise.
When the cut-out operates, the unit stops working and the overtemperature cut-out indicator lights up.
Remove the block from the unit by screwing the extractor tool into the thermometer hole and lifting the
block vertically. Remember that high temperatures are dangerous; wear insulating gloves and take
extreme care. Wait for the temperature to fall, perhaps by as much as 40°C, and press the reset button.
The unit will now work as usual.
TWIN CONTROL DIGITAL MODEL DB-2TC
The model DB-2TC accommodates 2 aluminium blocks with independent temperature controls so that
each block may be set to a different temperature. The layout and operation of the controls for each block
is as described above.
If using this model with only one block in place the side with no block should have its set temperature
adjusted to 30°C.
POWER UP SCREEN
When you first switch on, the display will show the edition of the software which your unit uses. For
example software issue "I" would be shown as follows:
23
0001
set