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MiniCapt Remote Microbial Air Sampler Operations Manual
Chapter 3 Ethernet Communications Overview
Static IP Addresses versus DHCP Addresses
All Particle Measuring Systems instruments use a static IP address. This means the
address is predefined. The address is used to identify the instrument when data is
collected. In contrast, many computers use a dynamic IP address (i.e., DHCP or
Dynamic Host Configuration Protocol).
In order for dynamically configured devices and statically configured devices to be
mixed on the same network, some mechanism must be used to segregate the DHCP
address range from the static address range. This mechanism is a standard
configuration parameter set in the router. The IT Department is typically responsible
for delineating the address range.
If static and dynamic addresses are not properly segregated, it may result in duplicate
addresses and unexpected network behavior.
Troubleshooting Ethernet Connectivity
>> These steps may be used to check communications to an Ethernet device.
1
Check for light on LEDs of the Ethernet connector. There should be at least one light
lit solid to indicate a connection. If not, there is hardware connection problem.
Figure 3-1
Ethernet port connectivity LED
a.
Is the cable bad?
a.1
Try a different cable.
a.2
If a direct laptop to instrument connection is being done, a cross-over cable
may be required. Cross-over cables are specially marked as such. Particle
Measuring Systems P/N 1000011477 is a cross-over cable.
b.
Is the other end of the cable alive?
Does a known good device work when connected instead?
