Dri-block Heater FAQs
Q: How is the over-temperature cut-out set?
A: On the 200°C block heaters a user-adjustable over-temperature cut-out is set to remove power from the heater should the block temperature exceed approximately 210°C. If required this temperature can be reduced; the cut-out should be set to trip at least 5°C above the maximum desired operating temperature. To set the over-temperature 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.
• 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 over-temperature 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.