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Fluke 2635A user manual Thermocouple Measurement Range Accuracy Test

Models: 2635A

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Maintenance 7

Performance Tests

5.For channel 1, select the two-terminal ohms function and 300 ohms range on the

Hydra Series II. Press Mand ensure the display reads a resistance of less than or equal to 4.0 ohms. (This test assumes that lead wire resistances are less than 0.1Ω.)

6.Open the ends of the test leads and ensure that the display reads OL" (overload).

7.Press M.This will stop the measurement.

8.Connect a cable from the Output VA HI and LO of the 5700A to the Input Module test leads (observe proper polarity).

9.Select the VDC function and 300 volt range on the Hydra Series II and first apply 0V dc then 290V dc input from the 5700A. Ensure the display reads between the minimum and maximum values as shown in Table 7-3 for the 0 and 290V dc input levels.

Note

Channels 0, 1, and 11 have a maximum input of 300V dc or ac (rms). The maximum input for all other channels is 150V dc or ac (rms).

10.With the exception of the selected voltage range and input voltage from the 5700A, repeat steps 1 through 9 for each remaining Input Module channel (2 through 20). Channels 2 through 10 and 12 through 20 should be configured for the 150V dc range and an input voltage of 150 volts.

Thermocouple Measurement Range Accuracy Test

Ensure that the Accuracy Verification Test for channel 0 meets minimum acceptable levels before performing this test.

Thermocouple temperature measurements are accomplished using Hydra Series II’s 90 mV and internal 900 mV dc ranges. (The 900 mV range is not configurable from the instrument front panel.) This procedure will provide the means to test these ranges.

Testing the 900 mV dc range requires computer interfacing with a host (terminal or computer). The host must send commands to select this range. This range cannot be selected from the Hydra Series II front panel.

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 "Computer Operations."

2.Power up Hydra Series II and allow the temperature to stabilize for 30 minutes.

3.Connect a cable from the Output VA HI and LO connectors of the 5700A to the VΩ and COM connectors on the front panel of the Hydra Series II.

4.Set the 5700A to output 0V dc.

5.Using either a terminal or a computer running a terminal emulation program as the selected host, send the following commands to Hydra Series II:

FUNC 0,VDC,5 <CR> MON 1,0 <CR> MON_VAL? <CR>

The returned value for channel 0 should be 0 mV ±0.006 mV.

Set the 5700A to output 90 mV DC. Send the following command: MON_VAL? <CR>

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Fluke 2635A user manual Thermocouple Measurement Range Accuracy 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.