07506C DCN6727 67

CHAPTER 8

Computer Interface, Commands, and Data Collection
This chapter provides information about the computer interface,
communications information, and data collection for the Ultrafine
Particle Monitor - Model 651. Information about using a Flash Drive
is also provided.

Computer Interface

The Model 651 provides four interfaces to allow for flexible data
collection and instrument control. This section of the manual
includes information about the following data interfaces:
Ethernet
Flash Drive
USB
RS-232 (Serial)
Although four interfaces are provided, you can only use one at a
time. The Serial and USB data interfaces share a common
communications channel to the Model 651 microcontroller. Data
input to the Model 651 from the Serial interface is exclusive from
input via the USB interface. Communications can be received from
the Serial interface until a connection is linked to the USB port.
When the link is established, communications can be received via
the USB port but not from the Serial port. When the USB link is
terminated, the Serial port can be used.

Ethernet

The Ethernet port on the Model 651 can provide system status
information or instrument control over a network. In the
instructions below, the client is used. Please note that Telnet
feature is not included with Windows Vista® or Windows 7
operating system and must it must be enabled to be used.