Maintenance

6

 

Performance Test

RTD Temperature Accuracy Test (Resistance) (2645A)

6-22.

 

The following RTD accuracy test applies to the 2645A and uses the 4-wire connection (see Figure 6-4).

1.Connect the Decade Resistance Source to Channels 1 and 11 Remove the Universal Input Module from the instrument and connect a cable from the Decade Resistance Source to the Universal Input Module terminals for channel 1 (Sense) and channel 11 (Source) as shown in Figure 6-4.

2.Configure Channel 1 for RTD-4WIn NetDAQ Logger, configure channel 1 for RTD-4W, Fixed-385 range, with RTD R0 set to 100 Ohms. (See “Configuring Analog Channel Functions" in Chapter 3 of this manual.)

3.Open Spy Window Select the Spy command from the Utilities menu. Select analog channel 01. Click OK to open the Spy window.

4.Verify Accuracy Configure the Decade Resistance Source for the output values below and verify the Spy window simulated temperature measurement is between the minimum and maximum values.

Decade Resistance

Source Value

100

200

300

Simulated

Temperature (°C)

0°C

266.34°C

557.70°C

Minimum Reading

-0.31°C

265.94°C

556.07°C

Maximum Reading

+0.31°C

266.74°C

558.33°C

5.Close Spy Window.

RTD Temperature Accuracy Test (DIN/IEC 751 RTD)

6-23.

The following RTD accuracy test applies to both the 2640A and 2645A, and uses the 4-wire connection (see Figure 6-4).

1.Connect the RTD Source to Channels 1 and 11 Remove the Universal Input Module from the instrument and connect the RTD to the Universal Input Module terminals for channel 1 (Sense) and channel 11 (Source) as shown in Figure 6-4.

2.Configure Channel 1 for RTD-4WIn NetDAQ Logger, configure channel 1 for RTD-4W, Fixed-385 range, with RTD R0 set to 100 Ohms (assuming the reference R0=100; enter the correct value for R0). (See “Configuring Analog Channel Functions" in Chapter 3 of this manual.)

3.Open Spy Window Select the Spy command from the Utilities menu. Select analog channel 01. Click OK to open the Spy window.

6-25

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Fluke 2640A user manual RTD Temperature Accuracy Test Resistance 2645A, RTD Temperature Accuracy Test DIN/IEC 751 RTD

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.