Chapter 4 : Connections
4-22 Lasair® Pro Aerosol Particle Counter Operations Manual
Instrument to Laptop Ethernet Setup
There are two ways to establish a direct Ethernet link between a laptop (or other PC) and a
Particle Measuring Systems instrument. The first way is to modify the PC Ethernet settings
to work with the existing instrument settings. The second way is to modify the instrument
settings to work with the existing PC settings. Since PCs are typically configured for DHCP,
this method is less obvious. However, for certain applications (such as demos or testing)
this method may be advantageous.
Cabling between a laptop and instrument can oen be done with a standard Cat 5
Ethernet cable. Older computers and older instrument designs may require an Ethernet
cross-over cable to communicate properly. This is available from Particle Measuring
Systems as P/N 1000011477. Newer computers use a mechanism called Auto-MDIX to do
the cross-over within the computer or instrument automatically.
Method 1: Modifying the IP Settings on a PC
This method allows using the existing instrument address. At the end of the
communications session, the laptop will contain an address that will prevent normal
communications to the corporate network. The procedure must be undone aer the
session.
1. Retrieve the network address parameters from the instrument. Use one of the
following methods:
a. Use terminal emulation soware such as PuTTY or HyperTerminal and the
“sta” command.
b. From the HOME screen of the Lasair Pro, navigate to the NETWORK tab of the
COMM screen. Note that parameters can be changed on this tab.
2. Determine a compatible network address and mask to set the PC. For example, an
instrument has address 10.12.43.217 and mask value 255.255.0.0. The PC must
use exactly the same mask value (i.e., 255.255.0.0). The address can be selected
as any valid address so long as the network portion is kept the same. Therefore,
10.12.43.216 would be acceptable, and 10.12.0.1 could also be used.
3. Configure the PC to talk at the selected address:
a. Navigate to the Ethernet or Local Area Connection Properties window.
i. In Windows 10, use the following navigation:
CHANGE ADAPTER OPTIONS
ETHERNET (RIGHT-CLICK)
PROPERTIES