9. Troubleshooting
Problem Causes Measures
Check cord connection
and power supply,
No display
Power not connected.
Fuse blown.
Unplug and re-attach
power cord.
Check and replace fuse
at power inlet.
Voltage or
Amperage
setting not
reached
NO LOAD
displayed
Maximum wattage
exceeded
Connection wires not
attached properly.
Buffer is not
conductive.
Current flow is low
due to low resistant
load
a division of
Resistance of the load
(gel tank buffer) is too
low. Change buffer
concentration, or adjust
Voltage to a lower value.
Check wire connections.
Check buffer
concentration.
Disable No Load
detection if required for
low resistance
application.
300V Power Supply
Operating Manual
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
This product is for research only
Version 0616-1
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.
Contents
1. Introduction………………………………………............1
2. Product Overview.........………………..........................2
3. Specifications.………………………….….....................3
4. Installation….…………………………………..………....4
5. Warnings……………..………………………..................5
6. Operating Guide.……………………………………..…..5
7. Overview of Electrical Principles……….……………..9
8. Maintenance………………………………………………9
9. Troubleshooting………………….……........................10
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.
Voltage (V)
Current (I) =
_________________
Resistance (R)
Voltage (V)
Resistance (R) =
_________________
Current (I)
Power (W) = Current (I) x Voltage (V)
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
1. Introduction
6.4 No Load Detection
The myVoltTouch has a No Load Detection safety feature,
that will shut down the power supply if a load is not
connected.
If a connected load has a high resistance (such as a single
PAGE gel) and is run at a voltage at 100V or higher, the No
Load fault may occur.
For this type of application, the No Load Detection can be
disabled as follows:
Press MODE to select the mAMP parameter for adjustment.
Pres the “down” button to adjust the mAMP setting to
below 5 mAMP.
“LOAD DET ON” will be
displayed in a button on
the bottom of the
screen. Press this
button to change to
“LOAD DET OFF” and
this will disable the No
Load Detetion feature.
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
info@benchmarkscientific.com.
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.
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.
8
1
2. Product Overview
4 Pairs of
Electrical Outputs
FRONT
Touch Screen
Control and Display
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.
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 setting (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.
Folding
Front Feet
AC Power Inlet
and Fuse
REAR
Recesses for
Stacking 2 Units
2
Rating, Serial #
Label
6.5 Maximum Power Limit
The myVolt Touch Power Supply has a maximum power
output of 80 Watts.
Wattage (W) = Current (I) x Voltage (V)
If the maximum power is reached during an electrophoresis
run, the voltage 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.
7
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)
3. Product Specifications
myVolt Touch, 300V Power Supply
Output Voltage 5 to 300 VDC, in 5 V increments
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.
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.
Voltage Accuracy
Output Current 5 to 400mA, in 5 mA increments
Current Accuracy
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
Humidity 0 – 60%
Dimensions
Net weight 3.5lbs / 1.6 kg
Input Electrical 110VAC, 50/60Hz or 230VAC, 50/60Hz
Safety
+/- 2% of displayed value or 3V
(whichever is greater)
+/- 2% of displayed value or 5mA
(whichever is greater)
0 – 40°C
8.5x6.3x4.0in/21.5x15.5x9.75cm(W×D×H)
No Load Detection (can be disabled for low
resistance applications). Max Power Limit.
6
3
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
4. Installation
Visit us at www.TestEquipmentDepot.com
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.
Vertical
Orientation
Horizontal
Orientation
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.
6. Operating guide
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.
4
6.1 Touch Screen Control
Adjustable
Parameters
Status
Operation
Icon Buttons
Up/Down
Value
Adjust
Buttons
5
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