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Fluke 2625A, 2635A Terminal Resistance Test, Func 0,VDC,I100MV CR MON 1,0 CR MONVAL? CR

Models: 2635A 2625A

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Performance Testing and Calibration

4

Performance Tests

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

2.Power up Hydra, and wait 1/2 hour for its temperature to stabilize.

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

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:

FUNC 0,VDC,I100MV <CR> MON 1,0 <CR> MON_VAL? <CR>

The returned value for channel 0 should be 0 mV ±0.007 mV.

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

The value returned should now be 90 mV ±0.038 mV (between 89.962 and 90.038 mV).

6.Change the Hydra channel 0 function to the internal 1V dc range by redefining channel 0. Send the following commands:

MON 0 <CR>

FUNC 0,VDC,I1V <CR>

Set the 5700A to output 0.9V dc. Send the following commands: MON 1,0 <CR>

MON_VAL? <CR>

The value returned should be 900 mV ±0.22 mV (899.78 to 900.22 mV.)

4-7. 4-Terminal Resistance Test

Verify that the channel 0 accuracy verification tests for dc volts and ohms meet minimum acceptable levels.

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

2.Remove the Input Module from the rear of the instrument. Open the Input Module and connect a pair of test leads (keep as short as possible) to the H (high) and L (low) terminals of channel 1 and a second pair of test leads to the H and L terminals of channel 11. Reinstall the Input Module into the instrument.

3.Observing polarity, connect the channel 1 test leads to the Sense HI and LO terminals of the 5700A and the channel 11 test leads to the Output HI and LO terminals of the 5700A. Route wires with the method shown in Figure 4-1. Connect the wires to the terminals shown in Figure 4-2.

Note

4-terminal connections are made using pairs of channels. 4-terminal measurements can be made only on channels 1 through 10. The accompanying pairs are channels 11 through 20.

4-7

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Fluke 2625A, 2635A service manual Terminal Resistance Test, Func 0,VDC,I100MV CR MON 1,0 CR MONVAL? CR
Page 146 Page 148

2635A, 2625A specifications

The Fluke 2625A is a sophisticated data logger designed for a wide range of industrial and laboratory applications. This versatile instrument excels in capturing and monitoring temperature and voltage measurements with precision and reliability. One of its standout features is its ability to record data from various sensors, making it ideal for environments where comprehensive data acquisition is critical.

Equipped with a large LCD display, the Fluke 2625A provides clear and user-friendly access to real-time measurement data. Its graphical interface allows users to visualize trends and monitor readings easily, which significantly enhances usability. The device supports a variety of input types and can connect to thermocouples, RTDs, and other sensors, offering great flexibility for various measurement tasks.

The Fluke 2625A employs advanced measurement technologies that ensure accuracy in data logging. With a high sampling rate, it captures fast-changing signals while maintaining data integrity. The device features a built-in memory that allows for extensive logging, accommodating long-term monitoring tasks without requiring constant oversight. Users can set it to log data at specified intervals, offering customizable solutions for different monitoring needs.

Another significant characteristic of the Fluke 2625A is its robust communication capabilities. The device supports USB and RS-232 interfaces for easy connectivity with computers and other devices, making data transfer and analysis seamless. This feature is especially beneficial for users who need to compile or analyze large sets of data quickly.

Furthermore, the Fluke 2625A is designed with durability in mind. Its rugged construction makes it suitable for challenging environments, including those with high levels of vibration, dust, or moisture. This reliability ensures that the device can withstand the rigors of fieldwork while still delivering accurate measurements.

In summary, the Fluke 2625A is a powerful data logger that combines versatility, accuracy, and reliability. Its user-friendly interface, advanced measurement technologies, and robust design make it an essential tool for professionals in various industries, from manufacturing and HVAC to research and development. Whether monitoring temperature changes in a laboratory or assessing voltage levels in an industrial setting, the Fluke 2625A stands out as a trusted solution for effective data logging and analysis.