V&P Scientific, Inc.
3
Technical Note 380A
4. Connect power cord into the power receptacle on the back of the Temperature Controller. Connect the
power cord to a 120 V outlet (VP 741D). In the case of CE compliant models, connect the power cord to a
230 V outlet (VP 741DCE).
OPERATION
HEATING BLOCK OPERATION USING THE TEMPERATURE
CONTROLLER
1. Turn on the Temperature Controller using the on/off power switch. The Controller already has a temperature
programmed so the Heating Block will immediately begin to heat. The red number in the upper display is the
current temperature of the Heating Block. The green number in the lower display is the set point during
operation. See the Temperature Controller Operating Instructions (Appendix) for more details on features of
the display.
2. To turn off the Heating Block without turning the power switch off, press the down arrow key until green lower
display reads “OFF”.
Figure 3. Temperature Controller Display for the VP 741D Series Heat Block
3. Although the center of the Heating Block will be at the temperature on the display, the actual temperature of
samples in the microplate wells or tubes will be 3°C to 5°C below this temperature depending upon the efficiency
of heat transfer. It is recommended that the temperature in one or more samples be measured directly to
determine appropriate setting for a particular application.
4. For faster heat transfer, use a Heating Block Insert such as one that conforms to the bottom of a plate (for
example, VP 741I6B or VP 741I6C) or an insert that holds tubes or vials. Contact V&P Scientific for information
on these items.
5. The upper limit temperature on the Temperature Controller is set to 120
o
C at the factory. Temperatures higher
than 120
o
C should not be used with polypropylene tubes or microwell plates. Polypropylene will melt at
temperatures greater than 130
o
C. To operate at temperatures above 120
o
C, use of glass or other high
temperature-stable containers is recommended.
Upper
Display
Lower
Display
Up/Down
Arrows
On/Off
Power Switch
Set
Button
Shift Button
