Accuris myVolt Touch User manual

300V Power Supply
Operating Manual
a division of
This product is for research only

Contents
1. Introduction………………………………………............1
2. Product Overview.........………………..........................2
3. Specifications.………………………….….....................3
4. Installation….…………………………………..………....4
5. Warnings……………..………………………..................5
6. Operating Guide.……………………………………..…..6
7. Overview of Electrical Principles……….……………..8
8. Maintenance………………………………………………9
9. Troubleshooting………………….…….........................9
9
8. Maintenance
Always disconnect the power cord for cleaning.
When cleaning the surfaces of the instrument, use a
lightly dampened cloth with mild detergent if needed.
Do not use any corrosive solutions that could damage
plastic.
Use caution when cleaning near the housing vents.
Do not allow liquid to enter the power supply.
9. Troubleshooting
Problem Causes Measures
No display Power not
connected.
Fuse blown.
Check cord connection
and power supply,
Unplug and re-attach
power cord.
Check and replace fuse
at power inlet.
Voltage or
Amperage setting
not reached
Maximum wattage
exceeded
Resistance of the load
(gel tank buffer) is too
low. Change buffer
concentration.
NO LOAD
displayed
Connection wires
not attached
properly. Buffer is
not conductive.
Check wire
connections. Check
buffer concentration.

8
1. Introduction
Thank you for purchasing the Accuris myVolt Touch™
Electrophoresis Power Supply with touch screen control.
This operating manual includes a product introduction, and
important operating and safety information. Before using
the power supply, please read this manual in its entirety
and be sure to fully understand the features and methods
for proper operation. Keep this manual for future reference.
Please check the contents when opening the box, and if
there are any parts missing, damaged, or incorrect, please
contact your distributor or Benchmark Scientific’s Customer
Service Department at 908-769-5555 or by email
[email protected].
The myVolt Touch is a DC Power Supply for
electrophoresis separations. It is designed for laboratory
research applications.
The power supply has 4 sets of outputs that accept
standard electrical leads with banana plugs and should
only be used with electrophoresis tanks that incorporate
sufficient safety features to prevent electric shock.
1
7. Overview of Electrical Principles
Definitions:
Voltage: The amount of potential energy between two
points in a circuit.
Current: The time rate of flow of an electric charge,
measured in amperes.
Resistance: A material’s opposition to the flow of electric
current, measured in Ohms.
Power: The rate at which electric energy is transferred by
an electric circuit. Electric power is expressed in units of
watts, one watt is equal to one joule per second.
Current (I) =
Resistance (R) =
Power (W) = Current (I) x Voltage (V)
Resistance (R)
Voltage (V)
_________________
Voltage (V)
_________________
Current (I) WARNING:
This power supply outputs high voltage and current and
should be used only by experienced laboratory personnel
that understand how to safely operate the instrument.
Incorrect usage can present a shock or electrocution
hazard.

2. Product Diagram
27
6.5 Maximum Power Limit
The myVolt Touch Power Supply has a maximum power
output of 80 Watts.
Per Ohms Law:
Power (P) = Current (I) x Voltage (V)
If the maximum power is reached during an electrophoresis
run, the non-constant parameter will be limited to prevent
exceeding the maximum power output.
CAUTION: It is not recommended to run the power supply
at or near the maximum wattage, as this will cause the power
supply and gel tank to get hot. Most electrophoresis buffer
concentration will not have such low resistance that the
current and voltage level will come close to the maximum
power limit.
Touch Screen
Control and Display
4 Pairs of
Electrical Outputs
Folding
Front Feet Recesses for
Stacking 2 Units
AC Power Inlet
and Fuse
6.4 Automatic Cross Over
During an electrophoresis run, the power supply will attempt to
maintain the constant voltage or amperage setting, depending on
which parameter is set to “CONSTANT”.
If, during a run, the non-constant parameter (limit) is met due to
the resistance of the load, the power supply will automatically
“cross over” so the non-constant parameter will now be the
constant and limiting parameter.
FRONT
REAR Rating, Serial #
Label
In constant amperage mode, the power supply will output the set
mAmp current parameter, and the voltage will fluctuate relative
to the resistance of the load (buffer concentration in the attached
electrophoresis tanks) up to a maximum of the voltage setting
that has been chosen.

3
3. Product Specifications
myVolt Touch, 300V Power Supply
Output Voltage 10 to 300 VDC, in 5 V increments
Voltage Accuracy +/- 2% of displayed value or 3V
(whichever is greater)
Output Current 4 to 400mA, in 5 mA increments
Current Accuracy +/- 2% of displayed value or 5mA
(whichever is greater)
Maximum Power 80 Watts
Output Terminals 4 Pair, wired in parallel
Timer 1min to 9 hours, 59 minutes
Control Panel Capacitive touch screen
Display Backlit LCD, 128 x 128 pixel, dot matrix
Fuse 250V 2.5A, 5x20mm,Type T
Operating Temp 0 –40°C
Humidity 0 –95%
Dimensions 8.5x6.3x4.0in/21.5x15.5x9.75cm(W×D×H)
Net weight 3.5lbs / 1.6 kg
Input Electrical 110VAC, 50/60Hz or 230VAC, 50/60Hz
6
6.3 Constant Voltage / Constant Amperage
The myVolt Touch can be set to run with constant voltage or
constant amperage output, with the non-constant parameter set as a
limit.
Press the operation icon “CONSTANT …..” to switch between
“CONSTANT CURRENT” and “CONSTANT VOLTAGE” running
modes.
In constant voltage mode, the power supply will output the set
voltage, and the mAmp current value will fluctuate depending on the
resistance of the load (buffer concentration in the attached
electrophoresis tanks) up to a maximum of the mAmp current setting
that has been chosen.
6.2 Setting Parameters
The myVolt Touch Power Supply has 3 main parameters that can
be adjusted: Run Time (TIME), Voltage (VOLTAGE), and Current
(mAMP).
(See section 7 for an overview of Voltage, Current, Resistance, and
Power)
Press the operation MODE icon on the touch screen to change
parameter mode. “TIME” will start to flash to indicate that this
parameter can be adjusted. Press the UP/DOWN arrows to
change the TIME value.
Pressing MODE again will toggle to the next parameter that can be
set: VOLTAGE.
Adjust parameters (TIME, VOLTAGE, mAMP) as required for the
electrophoresis application.

5. Warnings
To avoid electrical shock, do not use this product with wet
hands and ensure that all electrical leads being used are
dry. Only use electrical leads that offer sufficient
protective insulation and gel boxes that have appropriate
safety lid systems.
Please carefully read this instruction manual before
operation to avoid any personal injury. Only trained
laboratory personnel should operate the system.
Do not attempt to open or repair the MyVolt Power Supply.
Contact your distributor or Benchmark Scientific for
service.
Always use the MyVolt Power Supply in an environment
with low humidity and low dust, also keep it away from
water, direct sunlight / strong light, corrosive gas, high
magnetic fields, heaters, fires and other heat sources.
45
6. Operating guide
6.1 Touch Screen Control
Up/Down
Value
Adjust
Buttons
Adjustable
Parameters
Operation
Icon Buttons
Status
4. Installation
Place the power supply on a smooth, level surface in an area
where it will not contact liquids or chemicals.
The myVolt Power Supply features “Dual Orientation”
technology, so it can be placed horizontally or vertically on
the Laboratory bench. The display screen system is
designed to recognize its orientation and the display will
rotate automatically to be right-side-up.
Connect one end of the included power cord to the
instrument and the other end to an appropriate electrical
outlet. Check the Rating/Serial # label on the rear of the
power supply for the required electrical input.
Vertical
Orientation
Horizontal
Orientation