Network Considerations

Glossary I

Glossary

I-24.

10Base2 Network wiring scheme using 50 ohm coaxial cable (10 MHz, Baseband, 200 meter max. length).

10BaseT Also called UTP. Network wiring scheme using unshielded, twisted pair cable (10 MHz, Baseband, Twisted Pair).

API Application Programming Interface. A documented interface that allows application software packages to access resources from a library. For example, WINSOCK is an API into the winsock.dll library, which itself gives users access to functions in the TCP/IP protocol stack software. Other commonly used APIs are the Windows SDK, OLE, NetBIOS, and DPMI.

ARP Address Resolution Protocol. A low-level portion of the TCP/IP protocol that automatically determines the relationship between a host’s IP address and its physical address. For example, on an Ethernet, the ARP table contains the relationship between a host’s IP address and Ethernet address.

BCN Base Channel Number. Used by the NetDAQ instruments and software to identify the channel number range assigned to a specific instrument. Set from the front panel controls on the instrument. Also used in the isolated network mode to set the lowest order portion of the IP address assigned to the instrument (198.178.246.BCN).

Bind The process of initializing the interface between the physical interface driver (device driver) and the bottom of the TCP/IP stack software. During the bind process the information in the protocol.ini (NDIS Driver) or net.cfg (ODI Driver) is communicated to the driver and the protocol software.

Bridge A device used to isolate two portions of a network on the Frame level. Used to minimize collisions on an Ethernet. Also acts as a repeater.

Brouter A device that combines bridge and router functions in the same box.

Client A computer system that uses resources made available by other computers on a network.

Default Gateway Address The address of the router or gateway that routes packets from the local subnet to other subnets in the network. If a host determines that the destination address for a packet has a different subnet number than its own subnet (via use of the subnet mask), it sends the packet to the default gateway to be routed to the correct subnet.

Dialog Box A standard MS Windows user interface mechanism that consists of a window containing various controls (input fields, check boxes, radio buttons, etc.)

DLL Dynamic Link Library. A library loaded automatically by MS Windows when required by an application software package and unloaded when it is no longer needed.

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Fluke 2640A, 2645A user manual Glossary

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.