6
3. When turning on the machine, the display will immediately show
“_ _ _ _”,
and then
shows the actual temperature in Celsius. The “power” light is off at this time. And when the
block temperature is over 50 ˚C, the “heat” light is on, otherwise, it is off, too.
Figure 3: The front panel view of the DB-3-200-01
4. Setting Operating Temperature:
- Turn the Temperature Control Knob on in the front of the unit to the required setting (OFF
or 1-9). The actual temperature of the block depends on the type of block and fit. Thermal
contact between block and unit is crucial for best results.
- Different designs of insert blocks may cause actual temperatures to vary and speed of
heating to vary. Place a thermometer in the special thermometer hole in one of the
aluminum blocks to indicate proper temperature.
- The unit will heat if the set temperature is higher than the current block temperature. This
will be indicated by the heater indicator light.
- The heater indicator light will begin to flash when the set temperature is approached. It
will flash more slowly when the temperature is beginning to stabilize.
- Please note there will be a lag time between the heater and the block.
5. Press “Start/stop” button to start the operation. The “power” light is on and “heat” light
is flashing at this point. When reaching the equilibrium, the “heat” light is steady on. The
equilibrium point is set @ 0.1 degree of the accuracy. It might take longer time to reach.
Caution: when putting the cold test tubes or other vials, it may cause the tubes/vials
to break!
6. When running, i.e. the “power” light on, the set point of the heated block could not be
changed. To change the set point of the temperature, press “Start/stop” button to stop the
run (the “power” light will go off), and then change the set point as indicated in the step 4.
7. The DB-3-200-01 always shows the actual temperature reading. To see the set point
temperature, press the “Set” button, and the LED will show the set point temperature.
8. After use, wait until the block cool down to below 50 degrees (the “heat” light is off) and
turn off the block heater.
