Maintenance 7

Performance Tests

Note

Four-terminal connections are made using pairs of channels. Four- terminal measurements can be made only on channels 1 though 10 (n). Their accompanying pairs are channels 11 through 20 (n+10).

3.Switch the instrument ON.

4.Insert the RTD probe and a mercury thermometer in a room temperature bath. Allow 20 minutes for thermal stabilization.

5.Dependent on the type of connection made in step 2, select either the two-terminal or four-terminal RTD temperature function, RTD type PT (DIN/IEC 751), for channel 1 on the Hydra Series II. Press Mand ensure the display reads the temperature of the room temperature bath (within tolerances shown in Table 7-6) as measured by the mercury thermometer.

6.The RTD Temperature Accuracy test is complete. However if you desire to perform this test on any other channel (0 or 2 through 20) repeat steps 1 through 5 substituting the appropriate channel number.

Note

The only type of temperature measurement that can be made on channel 0 is two-terminal RTD. Channels 11 through 20 will support only two- terminal RTDs.

Table 7-6. Performance Tests for RTD Temperature Function (DIN/ IEC 751 Amendment 2)(ITS-90)

RTD TYPE

TEMPERATURE ACCURACY SPECIFICATIONS 1 YEAR @ 18-28°C

2-wire (channel 0)

-0.54°C to 0.59°C

2-wire (channels 1-20)

-0.54°C to 11.54°C

4-wire

±0.54°C

Assumes RTD R0 is set to 100.00 e for each channel.

Digital Input/Output Verification Tests

Digital Input/Output verification testing requires computer interfacing with a host (terminal or computer). The host must send commands to the instrument to control the digital lines for this test. Refer to Chapter 4 for a description of configuring and operating the instrument.

Digital Output Test

1.Ensure that communication parameters ( i.e., transmission mode, baud rate, parity, CTS, and echo mode) on the Hydra Series II and the host are properly configured to send and receive serial data. Refer to Chapter 4.

2.Switch OFF power to the instrument and disconnect all high voltage inputs.

3.Remove the Digital I/O ten terminal connector from the rear of the instrument and all external connections to it. Connect short wires (to be used as test leads) to the GROUND and 0 through 7 terminals. Leave the other wire ends unconnected at this time. Reinstall the connector.

4.Switch power ON to both Hydra Series II and the host. Verify that Hydra Series II is not scanning. If Hydra Series II is scanning, press Qto turn scanning off, then cycle power off-on again.

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Fluke 2635A user manual Digital Input/Output Verification Tests, Digital Output Test
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2635A specifications

The Fluke 2635A is a highly advanced multichannel data acquisition system designed for engineers and technicians requiring precision and versatility in their measurement tasks. This instrument excels in monitoring and capturing data from various sources, making it a valuable tool in laboratories, production environments, and field applications.

One of the standout features of the Fluke 2635A is its ability to support up to 20 measurement channels. Users can simultaneously monitor multiple signals, which is crucial for complex testing scenarios where numerous variables need to be tracked. The device is equipped with a 6.5-digit precision measurement capability that ensures high accuracy and resolution in readings. This level of precision is particularly beneficial in applications such as environmental monitoring, research and development, and industrial process control.

The unit incorporates a variety of measurement modes, including voltage, current, temperature, and resistance, making it exceptionally versatile. The Fluke 2635A not only handles standard signals but also integrates with various transducers, providing extensive compatibility for users engaged in diverse testing applications.

To enhance data management, the Fluke 2635A offers advanced data logging capabilities. Data can be stored internally or transferred to external devices for further analysis. The internal memory can accommodate extensive datasets, which can be crucial in long-term monitoring tasks. Integration with external software enables users to analyze and visualize data effectively, allowing for informed decision-making based on comprehensive results.

The user interface is designed for ease of use, featuring a large, bright LCD display that clearly presents measurements and status information. The device is also equipped with a simple navigation system, allowing users to switch between channels and measurement types without hassle.

In terms of construction, the Fluke 2635A is built to withstand rigorous environments. It features a robust design that ensures reliability and durability, making it suitable for both laboratory settings and field operations. Furthermore, the device supports a wide temperature range, thus enabling usage in diverse conditions.

Overall, the Fluke 2635A is a powerful and flexible instrument that provides precise measurements across multiple channels, supporting a wide range of applications. Its advanced technology, combined with user-friendly features, makes it an essential tool for professionals in various fields. The combination of accuracy, flexibility, and durability solidifies its standing as a trusted choice for data acquisition and monitoring tasks.
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