USB voltmeter is a small module to
measure voltage.The USB Voltmeter sends measured data to PC via USB and
a computer displays the data on a monitor. The voltmeter is supplied
with USB cable voltage +5 V.It does not need other external power
supply
This web page presents four types of USB voltmeters. They differ from
each with measured range, accuracy and resolution.
| Type |
Range |
Resolution |
Error |
| USB Voltmeter Type 1 |
0 V to +50 V |
0,1 V |
max 0,1V |
| USB Voltmeter Type 2 |
-50 V to +50 V |
0,01 V |
max 0,005 V |
| USB Voltmeter Type 3 |
-20 V to +2 0V |
0,0001 V |
max 0,0001 V |
| USB Voltmeter Type 4 |
0 V to +50 V |
0,1V |
max 0,1 V |
 |
USB Voltmeter Type 1 (
monitor )
| Usage
: |
Technical
parameters: |
Voltmeter Type 1 is designed to easily measure the voltage.
It is a version with 10-bit A / D converter. It is suitable for
monitoring the voltage.
|
Range :
Resolution :
Impedance :
Error :
Speed : |
0V to + 50V
0,1 Volt
1 MOhtm
0,1V max
60 times/sec
|
Pictures
: USB Volmteter Type 1 ( click to enlarge images
)
|
Voltmeter
Type 1 uses
inner A/D converter built into the microprocessor. Measuring range is
0V to +50V. The resolution is 0.1 V in entirely range what is enough
for the monitoring of voltage. Voltage is measured 60 times/sec.
|
Voltmeter contains a
microprocessor and an amplifier for achieving a high input impedance.
It can measure a positive voltage only.
To display the measured voltage it uses software USBMeasure.exe that
comes with the voltmeter. For more information about software click
here. It can login measured values into .csv file,
which can be opened in MS Excel.
For developers is supplied COM component, that enables to
create own
applications.The COM
component works with all popular languages like visual basic, C/C++,
C#, javascript etc.
|
 |
 |
USB Voltmeter Type 2 (
standard )
| Usage
: |
Technical
parameters: |
|
Voltmeter Type 2 is a very suitable solution for USB voltmeters. It is
a version with 16-bit A/D converter. It has sufficient range and very
good electrical parameters.
|
Range :
Resolution :
Impedance :
Error :
Speed : |
-50 V to + 50 V
0,01 Volt
1 MOhtm
0,005V max
3 times/sec
|
Pictures
: USB Volmteter Type 2 ( click to
enlarge images
)
|
Voltmeter Type 2 can measure both positive and negative voltage from
-50V to +50V. Resolution is 0.01 V in entirety range, which is very
good resolution. It has a full differential input. Voltage is measured
three times per second.
This voltmeter uses 16-bit
external A/D converter with very good performance. It is based on A/D converter MAX1492. [Datasheet]
To display the measured voltage it uses USBMeasure.exe software that
comes with voltmeter. More information about software is here. It also
allows you to log data into .csv file.
For developers is supplied COM component, that enables to create own
applications. Voltmeter is type plug and play.
There is no need to install any USB drivers.
|
 |
 |
USB Voltmeter Type 3 ( high
resolution )
| Usage
: |
Technical
parameters: |
Voltmeter Type 3 is used to measure small voltage. It is a version with
20-bit A/D converter. It has a small measuring range (-20V to +20 V)
and high resolution 0.0001 V.
|
Range :
Resolution :
Impedance :
Error :
Speed : |
-20V to + 20V
0,0001 V
100 kOhtm
0,0001V max
3 times/sec
|
Pictures
: USB Volmteter Type 3 ( click to
enlarge images
)
|
Voltmeter
Type 3 can measure both positive and negative voltage from -20V to
+20V. Resolution is 0.0001 V in entirety range. It has a full
differential input. Voltage is measured three times per second.
Voltmeter Type 3 uses 20-bit
external A/D converter with very good performance. It is based on A/D converter MAX1494. [Datasheet]
To display the measured voltage it uses USBMeasure.exe software.
More information about software and API is here.
It also allows you to log data into .csv file.
For developers is supplied COM component, that enables to create own
applications. Voltmeter is type plug and play.
There is no need to install any USB drivers.
|
 |
 |
USB Voltmeter Type 4 (
4-channel )
| Usage
: |
Technical
parameters: |
| Voltmeter Type 4 is a 4-channel voltmeter
designed to easily measure the voltage. It is a version with 10-bit A/D
converter.
|
Range :
Resolution :
Impedance :
Error :
Speed : |
0V to + 50V 0,1V
1 MOhtm
0,1 V max
20 times/sec
|
Pictures
: USB Volmteter Type 4 (
click to
enlarge images
)
|
Voltmeter
Type 4 has the same properties as Type 1, but it is a 4-channel
version. Measuring
range is 0V to +50V. The resolution is 0.1 V in entirely range. Voltage is measured 20 times/sec.
|
Voltmeter Type 4 has 4
independent inputs amplifiers and each channel measure in the range
0-50V. Measured values are displayed on the monitor.
If it is necessary to measure more than four channels, it is possible
to connect more of these 4-channel voltmeters. But a user will have to
make his own application from the supplied API.
Voltmeter is type plug and play. There is no need to install any USB
drivers.
|
 |
All the voltmeters have USB conector Type B. The voltmeters
are
galvanically connected
with a
PC. It is possible to simultaneously connect up to 127
USB
voltmeters. Instalation of USB voltmeter is completely
automated. When you plug the voltmeter into the USB port a new
message appears :
"Found new hardware" and "Hardware is ready for
use" and voltmeter and is ready for use.
Software + API
|
Software.
voltmeter is supplied with software USBMeasure.exe. It is standard
software for measuring with the USB voltmeters.
We also offer API (USBMeasure.dll) for easy and quick creation of
custom applications. API task is to ensure measurement and data
communication with PC. For that purpose has API all the necessary
features. Developer only add your own functionality and make their own
graphical interface (GUI).
The API is implemented as a COM component. This component can be used
in all known programming languages. It was tested with C#, C++
, visusal basic, delphi and javascript.
Source code examples are in the program help.
|
 |
USB Voltmeter -> PC
communication
USB Voltmeter - HID device.
All voltmeters are HID devices - Human Interface Device. These devices
use USB drivers already installed by default in Windows. It's
the same type of communication as a PC communicates with the USB mouse
or USB keyboard. This applies to all versions of Windows - from windows
XP above.
USB voltmeters have their own unique VID & PID numbers,so there
is no possibility of collision between other USB devices.