Computer Interface, Commands, and Data Collection

Teledyne API Ultrafine Particle Monitor - Model 651

USB

USB communications are available with the Model 651. USB driver software must be installed on the host computer. For Windows® operating systems the drivers may be downloaded from the USB chip manufacturer’s site at: http://www.ftdichip.com/Drivers/VCP.htm

To install the USB driver, follow these instructions:

1.Find the appropriate driver for the host computer’s operating system.

2.Download the driver to the host computer.

3.Extract (unzip) the driver to a blank folder.

4.Connect the computer to the Model 651 USB port.

5.Follow the Add New Hardware wizard steps and browse to the folder containing the extracted driver. If the wizard does not start, use the Add Hardware function on the Control Panel.

When the USB driver is loaded, the operating system recognizes the Model 651 as a new serial device. In Microsoft® Windows® operating system this is a new port (such as COM2 or COM6). If it is not obvious which COM port is being used, you can check in the computer’s Device Manager. To check which COM port is being used, follow these instructions:

1.Open the Control Panel and choose System.

2.In the System Properties dialog box, choose the Hardware tab and then click Device Manager.

3.In the Device Manager dialog box, click the + sign next to Ports (COM & LPT). The USB Serial Port indicates in parenthesis which COM port is being used.

Connect the supplied USB cable between the Model 651 USB port and a computer running the Windows®-based operating system

RS-232 Serial Communications

The communications port is configured at the factory to work with RS-232-type devices. RS-232 is a popular communications standard supported by many computers. The Model 651 has one 9- pin, D-type subminiature connector on the back panel (labeled Serial). Table 8-1 lists the signal connections.

Note: This pin configuration is compatible with standard IBM® PC serial cables.

IBM is a registered trademark of International Business Machines Corporation in the United States, other countries, or both.

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Teledyne 651 operation manual Usb, RS-232 Serial Communications