Maintenance 7

Performance Tests

RTD Temperature Accuracy Test

The following two RTD Temperature Accuracy Tests are different in that one test uses a Decade Resistance Source and the other uses an RTD. Only one of the tests need to be performed to assure operation.

RTD Temperature Accuracy Test (Using Decade Resistance Source)

Ensure that Channel 0’s Accuracy Verification Test for DC Volts and 300 Ohm

Resistance Range meets 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. For Four-terminal performance testing, connect a second pair of test leads to the H (high) and L (low) terminals of channel 11. Reinstall the Input Module into the instrument.

3.Connect channel 1’s test leads to the Output HI and LO terminals of the Decade Resistance Source. For Four-terminal performance testing, also connect channel 11’s test leads to the Output HI and LO terminals of the Decade Resistance Source. Connect as shown in Figure 7-3.

Note

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

4.Switch the instrument ON.

5.Select the Four-terminal RTD temperature function, RTD type PT, for channel 1 on the Hydra Series II. Press M, select a Decade Resistance value, and ensure the display reads between the minimum and maximum values shown on Table 7-5.

6.The RTD Temperature Accuracy test is complete. However if you desire to perform this test on Input Module channels (2 through 10), 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.

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Fluke 2635A user manual RTD Temperature Accuracy Test Using Decade Resistance Source
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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.

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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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