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MiniCapt Remote Microbial Air Sampler Operations Manual
Chapter 3 Ethernet Communications Overview
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 often 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 after the session.
1
Retrieve the network address parameters from the instrument. This can be done
using a HyperTerminal serial link and the “
status”
command.
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
Local Area Connection Properties
window.
In Windows XP
In Windows 7
Start
Control Panel
Network Connections
Start
Control Panel
Network and Internet
Network and Sharing Center
Change Adapter Settings
NOTE:
Do not select anything with the word “Wireless” or the word “Virtual”.
a.1
There may be more than one choice to select at this step.
Choose the item labeled
LAN
or
Local Area Connection
.
