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Fluke 2640A, 2645A user manual Scanning and Logging, RS-232 Interface

Models: 2645A 2640A

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Overview 1

Host Computer Requirements

Designate one instrument in the group as the Master and the others as Slaves. The Master controls scanning operations, including the scan intervals and method of scan triggering. You can create only one group instrument.

Scanning and Logging

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When a scan is triggered, the instrument scans the 20 analog channels and calculates the 10 computed channels. It stores the resulting time-stamped data in a scan record. Scans can be triggered from several sources:

∙Interval Trigger, where an elapsed interval timer triggers a scan.

∙External Trigger, where an external input (ground or logic low) applied to the instrument TI (Trigger In) line triggers a scan.

∙Alarm Trigger, where a channel going into alarm status a scan.

NetDAQ Logger obtains scan records from the instruments and logs the data into files. Each scan record written in the data file consists of a timestamp, values from all configured analog channels and computed channels, the alarm states, the digital I/O line status, and the count of the totalizer.

RS-232 Interface

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The instruments include an RS-232 port for calibration and factory procedures; the RS-232 port is not used for instrument control or scan data collection. The NetDAQ Service Manual (PN 942615) describes calibration and factory procedures that use the RS-232 port. See also “Calibration” in Chapter 6 of this manual.

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Fluke 2640A, 2645A user manual Scanning and Logging, RS-232 Interface
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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.