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DSN- VC288 Panel Mount DC 100V 10A Voltmeter Ammeter

This DC 100V 10A Ammeter Voltmeter is consist of 0.28 inch 5 wire red LED. With 100V DC can be measured by this meter with 0.1V resolution. This volt ammeter contains 2 wire harnesses. 2 poles with RED and BLACK lead used to provide power for the meters. this meter is portable and small in size. DSN-VC288 DC 100V 10A shows volt and ammeter at the same time on the same screen.

Its operating voltages are 6 to 30 volts.  This is a separate power supply that is isolated from the source, it is possible to use the same supply but it seems to affect the amp meter reading. 3 wire harness used for a ground.


Specifications of DSN-VC288 DC 100V 10A Voltmeter Ammeter:

  • DSN-VC288 DC 100V 10A voltage measurement range is 0.0 to 100V.
  • Its current test range is 0 to 999mA, with 0 to 10A.
  • DC 4 to 30V is its power supply range.
  • Its voltage error is +-o.1%.
  • Its current error is +-1%.
  • Its working current value is <20mA.
  • Its refresh rate is almost 300mS once.
  • It can display a double three-digit 0.28 inch LED digital tube.
  • Its display color is RED and BLUE.
  • Its size is 48 x 27 x 22mm.
  • Its working temperature is -10 to 65 degrees centigrade.




  • 0-100V DC voltage measurement range
  • 0-10A Low-side DC current measurement range with built-in current shunt
  • Dual 0.28″ 7-segment displays
  • 4.5 to 30V operating voltage
  • ± 1 digit accuracy

These modules work well for monitoring both voltage and current in applications such as solar cells or they can be used in home brew power supplies to provide a digital readout.



The module has two 3-digit displays each consisting of 0.28″ 7-segment displays.  The top voltage display is red and displays the measured voltage and the bottom current display is blue and displays the measured current.  Accuracy is ± 1 digit for both displays.



The meter comes with two wiring harnesses that plug into connectors on the back of the module.


1×3 Wire Harness

The 3-wire small gauge harness is used to supply power to the module and to provide the voltage input for measurement.

  • Red Wire =     Panel meter power.  Connect to 4.5 to 30VDC
  • Black Wire =   Panel meter ground
  • Yellow Wire = Connect to voltage to be monitored


1×2 Wire Harness

The 2-wire large gauge harness is used for measuring current.  The meter connects between the negative lead of the load and ground (low side of the load) for measuring current.

  • Red Wire =   Connects to the negative lead of the load
  • Black Wire = Connects to ground

When wiring the module in, there are two basic connection schemes depending on if you want to power the meter from the same power source that you are monitoring or if you are using a separate power supply.  Both are outlined below.


Using the same power supply

If the power supply being monitored is 30V or less, the meter can be powered off the supply that is being monitored.  In this case, it is not necessary to connect the small black wire since the display ground is internally connected to the same point as the thick black wire.


Using a separate power supply

If monitoring a voltage that can go under 4.5V or over 30V, it is necessary to power the meter from a separate isolated power supply.  In this case, the small black wire will need to connect to the ground of that separate power supply.


Voltage Measurement

The yellow wire is the input for the voltage measurement.

Accuracy of the voltage reading is ±1 digit.  There is a trimmer pot on the back of the module labeled V_ADJ which can be used to calibrate the display against a reference meter if desired.


Current Measurement

The large red and black wires pass the current through a built-in shunt in the module.  From the voltage drop across the shunt, the meter can calculate the current.

Accuracy of the current reading is ±1 digit.  There is a trimmer pot on the back of the module labeled I_ADJ which can be used to calibrate the display against a reference meter if desired.

The current can be measured in the positive direction only.  If the display is not showing the current reading, ensure that the large black and red wires aren’t hooked up backwards.


Please Note:  The meter is designed to connect to the low side of the load between the load and ground.  It cannot be connected on the other side of the load between the positive voltage and the load or else the meter will be damaged. 


Resetting the Display

We have not seen this happen, but if the meter display gets hosed and the digits are indicating a completely incorrect value, it is possible to reset the meter.

To do this, locate the two holes in the corner of the board marked ‘TR’.  With power off and no inputs on the voltage and current sense wires, short these two points on the board with something like tweezers and then apply power to the module using the small black and red wires.  After a couple of seconds the display will reset and the short can be removed.

DSN-VC288 DC 0-100V 0-10A Volt-Ammeter

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