Cole-Parmer BH-200 Serie Mode D'emploi page 4

5. This setting may be increased by pressing the
button labeled ▲ or decreased by pressing the
button labeled ▼ while continuing to press
and hold the "set" button – see figure 3.
6. Pressing these buttons once adjusts the
setting up or down in 0.1°C increments.
Pressing and holding will scroll the display
rapidly up or down until the desired value is
reached.
7. When the desired temperature is displayed
release the "set" button to revert the display
to showing actual temperature.
8. The instrument will now begin to heat the
aluminium blocks to this temperature.
9. The light labeled "heat" on the control panel
will illuminate continuously during the heating
phase but will begin to flash when the set
temperature is approached.
10. Once the set temperature is reached the
instrument will maintain the blocks at this
temperature until the setting is changed or
the instrument is turned off.
11. Containers may be removed from or added to
the blocks at any time during operation.
N.B. Care must be taken if placing cold glass
vessels into pre-heated blocks. The resulting
thermal shock may cause the container to
break.
12. After use the instrument should be switched
off at the rear and allowed to cool. It should
then be disconnected from the electricity
supply. Note that when next used the
instrument will have retained its previous set
temperature.
3.2 Dual control digital models BH-200DC-2 &
BH-200D-2-HTC
Models BH-200DC-2 & BH-200D-2-HTC
accommodate 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 exactly 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.
2
3.3 Analogue model BH-200-2
Figure 4 - analogue controls
1. Switch on using the switch located at the rear
of the instrument – see figure 2.
2. The "power" light will illuminate - see figure 4.
3. The desired temperature may be set using the
control knob labeled "heat" on the right
hand side of the control panel – see figure 4.
If turned to the position labeled "off" the
heater will be switched off. Otherwise the
scale around the knob will give guidance as
to the set temperature.
4. The instrument will now begin to heat the
aluminium blocks to this temperature and the
light labeled "heat" on the control panel will
illuminate – see figure 4.
5. If the temperature of the blocks exceeds
50°C the red light labeled "hot" will begin to
flash to warn that the blocks are too hot to
touch – see figure 4. This will continue even
if the heater is turned off using the knob on
the control panel so long as the instrument
remains connected to the electricity supply
and turned on with the switch at the rear.
6. Once the set temperature is reached the
instrument will maintain the blocks at this
temperature until the setting is changed or
the instrument is turned off.
7. Containers may be removed from or added to
the blocks at any time during operation.
N.B. Care must be taken if placing cold glass
vessels into pre-heated blocks. The resulting
thermal shock may cause the container to
break.
8. If the temperature needs to be set accurately
it may be measured using a thermometer
placed in the small hole in the top of the
block. The position of the control knob
should then be adjusted to raise or lower the