HYDRA

Service Manual

∙Surface-mount assemblies require rework with wire solder rather thanwith solder paste. A 0.025-inch diameter wire solder composed of 63%tin and 37% lead is recommended. A 60/40 solder is also acceptable.

∙A good connection with SMT requires only enough solder to make apositive metallic contact. Too much solder causes bridging, while toolittle solder can cause weak or open solder joints. With SMT, theanchoring effect of the through-holes is missing; solder provides theonly means of mechanical fastening. Therefore, the pca must beespecially clean to ensure a strong connection. An oxidized pca padcauses the solder to wick up the component lead, leaving littlesolder on the pad itself.

Refer to the Fluke "Surface Mount Device Soldering Kit" for a complete discussion of these techniques.

5A-3. Error Codes

At reset, the Hydra Data Bucket software performs power-up self-tests and initialization of Flash Memory, NVRAM, Display, Calibration Data, and measurement hardware. Self-test failures are reported on the display with "Error" in the left display and an error code (1-9,A,b,C,d) in the right display.

Several of these error codes might never be displayed. Certainly, errors 4 and 5, which signify a faulty or dead display, could not be reported in the normal (displayed) manner. Other errors might not appear on the display. Therefore, the following additional methods exist for accessing error information:

∙If ’boot’ is displayed at power-up, it is likely that one ofthe memory tests failed (Errors 1 through 3). To determinewhat the error status was, connect a terminal or computer to theRS-232 interface (19200 baud, 8 data bits, no parity). Send a carriagereturn or line feed character to the instrument and it should sendback a prompt that shows a number followed by a ’>’ character. Thenumber is interpreted in the same way as the responses for the *TST?and POWERUP? commands; refer to *TST? in Section 4 of the HydraUsers Manual. For example, a ’4>’ prompt indicates that the test ofthe NVRAM (A1U20 and A1U24) failed and the instrument was not ableto safely power-up and operate.

∙The computer interfaces can be used to determine self-check statususing the *TST? query. Refer to Section 4 of the Hydra Data BucketUsers Manual for a description of the *TST? response. Note that theextent of the error-producing damage could also cause the instrumentto halt before the computer interfaces are operational.

∙The POWERUP? computer interface command can be used to determinewhich errors were detected at power-up. POWERUP? uses the sameresponse format as *TST?; refer to *TST? in Section 4 of the HydraData Bucket Users Manual.

Table 5A-1 describes the error codes.

Note

Each error code is displayed for 2 seconds.

5A-4

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Fluke 2635A, 2625A service manual 5A-3. Error Codes
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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.
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