V&P Scientific VP 741D User manual

V&P Scientific, Inc. 1 Technical Note 380A
Technical Note 380A
OPERATION MANUAL FOR
VP 741D and 741DCE HEATING BLOCKS
Figure 1. Parts of a VP 741D Series Heating Block
Figure 2. Back of Controller (left). Heating Block Connector Cable (right)
for VP 741D Series Heating Block.
WARNING!!!!!
VP 741D series Heating Blocks can be very hot when operating, so exercise caution.
Do not handle red aluminum heating portion of the unit while it is HOT!!
Temperature
Controller
Heating Block
Mica SBS
Adaptor
Load
Sensor
Power
Sensor
Load

V&P Scientific, Inc. 2 Technical Note 380A
Figure 3. Aluminum lid (with securing screws), lifting tray
and silicone sealing pad for preventing evaporation.
Table 1. Models of VP 741D Series Heating Blocks
VP 741D
Heating Block, deep chamber for microplates or racks of tubes or vials, INKBIRD controller,
temperature range 25 to 200C, 120V, 12.5 mm Mica SBS adaptor on bottom.
VP 741DCE
Heating Block, deep chamber for microplates or racks of tubes or vials, INKBIRD controller,
temperature range 25 to 200C, 230V, 12.5 mm Mica SBS adaptor on bottom.
SET-UP
HEAT BLOCKING INSTALLATION
1. Carefully remove Heating Block and Temperature Controller from packaging inside shipping box. Place the
Heating Block on a working surface that is clear of heat sensitive items, such as paper or equipment, or heat
conducting material. The Temperature Controller can be placed next to the Heat Block or up to 6 feet away
with Connector Cable.
2. Important Note: Make sure to use Heating Block and PID Controller that have matching serial number (S/N).
Once a Heating Block is calibrated using the PID Controller, this is important for maintaining that calibration.
If Heating Block and Temperature Controller are mismatched, calibration must be carried out again. Heating
Block serial number is found by turning over the block while the serial number for the Temperature Controller
in on a label on its side.
3. The Heating Block Connector Cable, which is attached to the block, has two plugs on the free end for
connecting to the Temperature Controller (refer to Figure 2). Connect the round 3-pin plug of the Connector
Cable into the receptacle marked “Load” on the back of the Temperature Controller as shown in Figure 2. Also
on the back of the Controller, connect the 2-prong plug of the Connector Cable into the receptacle marked
“Sensor”.

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 120oC at the factory. Temperatures higher
than 120oC should not be used with polypropylene tubes or microwell plates. Polypropylene will melt at
temperatures greater than 130oC. To operate at temperatures above 120oC, 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

V&P Scientific, Inc. 4 Technical Note 380A
OPERATION WITH A MAGNETIC TUMBLE STIRRER
If using with a V&P Scientific Magnetic Tumble Stirrer, please also follow the instructions for the Stirrer. It is
recommended that only V&P Heating Block models with the special design to minimize Eddy currents be used
for magnetic stirring applications. Please contact V&P Scientific for more information.
Product Maintenance
GENERAL PRODUCT CARE
When not in use, turn the power switch off.
Do not place the Temperature Controller in chambers with temperatures above 40oC.
Do not submerse Heating Block or Temperature Controller into liquid or allow liquid to come into contact with
any openings.
Do not for any reason open the Temperature Controller enclosure or the heating element compartment of the
Heating Block. This will void the warranty.
For any other questions regarding the Controller, please refer to the Temperature Control Instructions
(Appendix).
If technical assistance is required, contact V&P Scientific, Inc. at 858-455-0643 or [e-mail]
WARRANTY
V&P Scientific, Inc. warrants this product to be free from defects in material and workmanship when used under
normal laboratory conditions for one year. This warranty begins on the date of delivery from V&P Scientific.
In the event this product fails under normal laboratory conditions within the specified period of time because of
a defect in material or workmanship, V&P Scientific will, at its option, repair or replace the product. Damage to
the product caused by user negligence is not covered.
Please keep the special shipping carton in case the unit needs to be shipped back to V&P Scientific. Please
contact V&P Scientific at the above address for return authorization and shipping instructions.
This warranty is made in lieu of other warranties expressed or implied including the warranties of merchantability
and fitness for a particular purpose. V&P Scientific shall not be liable for loss or damages arising from the use
of these products nor for consequential damages of any kind.
APPENDIX
Temperature Controller Operating Instructions: Supplied as an attached document.