2640A/2645A NetDAQ

Users Manual

DNS Domain Name Service. A database and associated software packages that provides the means of establishing and accessing the relationship between the names and IP addresses of network hosts.

Domain A group of computers on the network may be assigned a domain name and referred to by that name. Domain names can be used as part of the Internet name of a host. For example, my Internet name is dag@tc.fluke.com. My domain name is “tc”.

DOS An operating system used on the IBM PC and clones of this architecture. There are three major variations of DOS (and lots or minor ones): MS/DOS from Microsoft, PC/DOS from IBM, and DR/DOS from Novell.

Driver A software package that provides a specific and usually standardized interface between a hardware interface and application software. There are three standard network driver types; NDIS, ODI, and Packet.

Ethernet One type of physical network standardized by IEEE-802.3. The Ethernet standard supports several wiring types.

Ethernet Address An Ethernet address is a six-part number. It is usually expressed in hexadecimal format, with each part separated by a colon. This address must be unique and is usually assigned to a hardware interface device at the point of manufacture.

Frame A sequence of bits on a physical net that encompasses one block of communication between a transmitter and one or more receiver. A frame usually contains a header, source and destination physical addresses, an error detection field, and the information that is to be transferred. In TCP/IP over Ethernet, the Ethernet frame contains the IP packet, which, in turn contains the TCP packet.

Gate Also called a Gateway. A device used to interconnect different types of physical networks. Gateways also usually perform router functions.

Host Any computer system attached to a network.

Hub The central unit of a 10BaseT network. It is a hardware device that allows multiple hosts to communicate with each other via 10BaseT cable. Most hub devices also support gating 10BaseT wiring to other forms of network wiring.

Interrupt A scheme for signaling the CPU in a computer that an event has happened that needs software service. In the IBM PC there are two types of interrupts. The first are IRQs (or hardware interrupts) that are communicated via signals on hardware connections to an interrupt controller on the PC motherboard. The second are soft interrupts that allow one software package to signal another that some event has happened. Soft interrupts are initiated by executing a CPU instruction. In the PC/AT architecture, there are 16 IRQs and 256 soft interrupt levels available.

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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.
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