2640A/2645A NetDAQ

Users Manual

Trigger Input Test

6-31.

This test checks the ability of the Trigger Input line to trigger measurement scanning.

1.Configure Trigger Input In NetDAQ Logger, configure the scan parameters for External Trigger with an Interval 2 of 1 second. Be sure Interval Trigger and Alarm Trigger are not enabled. (See “Trigger Input” in Chapter 3 of this manual.)

2.Verify Configuration Channel 1 for Volts DC In NetDAQ Logger, verify channel 1 is configured for Volts dc, 3V range. (See "Configuring Analog Channel Functions" in Chapter 3 of this manual.)

3.Start Instrument Scanning Click the Start Instrument button on the Button Bar to enable instrument scanning, although no measurement scanning takes place because the external Trigger Input is not set.

4.Open Logging Status Window Select the Show Logging Status command from the Options menu to display the Logging Status window.

5.Verify Logging Status Note in the Logging Status window that the Retrieved Scans count is zero and not incrementing.

6.Set Trigger Input While monitoring the Logging Status window, connect the TI (Trigger Input) test lead to the GND test lead. Note in the Logging Status window, the Retrieved Scans count increments at 1-second intervals. Disconnect the TI and GND test lead connection.

7.Stop Scanning Click the Stop Instrument button on the Button Bar to stop instrument scanning.

Trigger Output Test

6-32.

This test checks the Trigger Output (125µs logic low) that occurs each time the instrument scans.

1.Configure Interval Trigger In NetDAQ Logger, configure the scan parameters for Interval Trigger with an Interval 1 of 1 second. (See “The Instrument Configuration Dialog Box” in Chapter 3 of this manual.)

2.Verify Configuration Channel 1 for Volts DC In NetDAQ Logger, verify channel 1 is configured for Volts dc, 3V range. (See "Configuring Analog Channel Functions" in Chapter 3 of this manual.)

3.Measure Unset Trigger Output Line Using a digital multimeter, measure the output of the unset TO test lead, referenced to the GND test lead, for a voltage greater than +3.8V dc.

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Fluke 2645A, 2640A user manual Trigger Input Test, Trigger Output Test

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.