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Fluke 2645A, 2640A user manual IP Addresses and Segmented Networks

Models: 2645A 2640A

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2640A/2645A NetDAQ

Users Manual

strips off the Frame information around the packet. So, unless you’re doing low- level analysis of network traffic, you never need to deal with Frame information.

For any protocol, the Packet consists of a destination address, a source address, some protocol type information, a message length field, and error detection information.

The TCP/IP protocol adds additional fields to the packet for message sequence determination and application port ID. The sequence number allows multi-packet messages to be assembled into the correct order. The port ID specifies which application running on a system is sending or receiving the message. Support of port IDs allow multi-tasking within a computer system, with messages being sent and received from the individual task.

In the TCP/IP protocol, error detection is supported by adding a checksum of the data in the packet to the end of each packet. Using this checksum, the receiving system can detect a bad packet and request a re-transmit (using the source address).

Each Host (device attached to the network wiring) in an Ethernet network has a unique address that is assigned by the interface hardware vendor. Each vendor is assigned a block of addresses and it is required that each device produced have a unique Ethernet address. Users of the TCP/IP protocol very rarely need to know or deal with the Ethernet address.

When TCP/IP is used, each host is also assigned a unique IP address, but this address is assigned by the user when the TCP/IP protocol software is initialized. In contrast to the Ethernet address, IP addresses have a structure that can be used by Network Management to facilitate breaking the network into segments (subnets) that make better use of the available data communication capacity (bandwidth). Use of IP addressing and the network segmentation scheme is described in “IP Addresses and Segmented Networks” in this appendix.

The relationship between a host's Ethernet address and its IP address is established by the TCP/IP protocol software. No user interaction is needed to establish this relationship. However, some network management systems require that the Ethernet address of each network host be kept in a data base. So, it is sometimes necessary to communicate the Ethernet addresses of all devices on the network to the Network Administrator.

IP Addresses and Segmented Networks

I-8.

If all networks consisted of a few computers and other devices attached to each other locally, use of IP addressing and network segmentation schemes would not be necessary. However, networks have evolved past simple work groups into campus-wide, inter-campus, and even international interconnect schemes. This makes it necessary to divide the network into subnets.

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Fluke 2645A, 2640A user manual IP Addresses and Segmented Networks
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2645A, 2640A specifications

The Fluke 2640A and 2645A are advanced bench multimeters that represent a significant leap in measurement technology, designed primarily for electrical engineers and technicians who require precision and reliability in their readings. These multimeters are built to cater to complex applications in manufacturing, research, and development.

One of the standout features of the Fluke 2640A and 2645A is their high accuracy. With specifications that can reach up to 0.0035% DC Voltage accuracy, users can trust that their measurements will be consistent and precise. This is especially critical in fields like automated test equipment (ATE) where exact measurements can be crucial for product quality and safety.

Both models incorporate a large, easy-to-read display, making it convenient for users to view measurement results clearly from a distance. They also feature a wide measurement range, capable of handling a variety of tasks, from basic voltage and current measurements to more complex tasks such as resistance and temperature measurements with appropriate sensors.

The multimeters also stand out with their advanced data logging capabilities. The Fluke 2645A, for instance, can store up to 10,000 readings, allowing for extensive data collection and analysis without the need for constant monitoring. This is beneficial for long-term studies or processes that require continual oversight.

Connectivity is another key characteristic. Both the 2640A and 2645A support USB and RS-232 interfaces, which enable easy integration with computers and other devices for seamless data transfer. This feature is important for engineers who rely on software for data analysis and visualization.

Another notable technology included in these models is the Fluke Connect app compatibility, which allows users to remotely monitor measurements from their smartphones or tablets. This capability provides added flexibility, enabling technicians to work hands-free while still keeping an eye on process measurements.

Additionally, the Fluke 2645A comes with a graphical display option, allowing users to visualize measurement trends over time. This graphical representation can be invaluable for diagnosing issues or observing patterns in data.

In conclusion, the Fluke 2640A and 2645A multimeters offer exceptional performance with their high accuracy, extensive data logging, connectivity options, and advanced visualization capabilities. These features make them indispensable tools for professionals in a variety of fields, ensuring that they can achieve reliable results in their measurement endeavors.