USB Voltmeter, 4-channel voltmeter, API , high resolution.

USB Voltmeter

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.

Open and Practice Measurement with PC.