Fluke 52, 51, 54, 53 service manual Keypad Test, Wide Range Performance Test Procedure

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51, 52, 53, 54 Series II

Service Manual

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53

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54

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Figure 1. Display Segments

Keypad Test

Check that all keypad switches are functional by pressing each key and confirming the proper response on the display.

Wide Range Performance Test Procedure

This test verifies the instrument specifications. If the instrument fails this test, perform the calibration procedure. If the unit continues to fail, it should be taken to a Fluke service center.

Ice Bath Construction

To begin the performance test, first construct an ice bath as follows:

1.Prepare a Dewar Flask by drilling two holes in its cap to accept the Mercury thermometer and thermocouple wires, or use a standard laboratory cork.

2.Fill the Dewar Flask with shaved or crushed ice made from distilled water.

3.Fill the Dewar Flask with enough distilled water so that the ice turns to slush, but do not add enough water to float the ice.

Note

As the ice melts, siphon off the excess water and add more ice. Allow approximately 5 to 10 minutes for the water to drop back to the freezing point.

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Contents 51, 52, 53, 54 Series Limited Warranty & Limitation of Liability Table of Contents 51, 52, 53, 54 Series List of Tables 51, 52, 53, 54 Series List of Figures 51, 52, 53, 54 Series 51, 52, 53, 54 Series IntroductionPrecautions and Safety Information Service CentersInternational Symbols International Electrical Symbols Used in this ManualSafety Information WWarning ThermometerEnvironmental SpecificationsGeneral Specifications ElectricalDisplay Test Performance Test and Calibration Required Test EquipmentPerformance Tests Wide Range Performance Test Procedure Keypad TestIce Bath Test Temperature Verification of IR Communications Port Fluke 53Calibration and Offset Adjustment CalibrationMenu on the display changes to CAL A-d Reference Junction Calibration Changing the Batteries Basic MaintenanceCleaning the Thermometer Disassembly and Reassembly DisassemblyReassembly Reinstalling the LCD AssemblyReplaceable Parts Number Replaceable Parts Fluke Part Qty Description ModelReplaceable Parts Description NumberQty Fluke Part Number Model NumberExploded View Model 54 is Shown 51, 52, 53, 54 Series Index 51, 52, 53, 54 Series
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51, 52, 53, 54 specifications

The Fluke 51 is a high-precision digital thermometer designed for industrial and laboratory applications, offering accurate temperature measurements across a wide range of environments. With its robust build and advanced features, the Fluke 51 is a tool of choice for field technicians and engineers.

The Fluke 51 boasts an impressive temperature measurement range, typically from -200°C to 1372°C (-328°F to 2500°F), making it suitable for various applications, including HVAC, food processing, and scientific experimentation. One of its standout characteristics is its thermocouple compatibility, supporting multiple thermocouple types such as J, K, T, E, N, R, S, and B. This versatility allows users to select the appropriate sensor for their specific temperature requirements, enhancing measurement accuracy.

A key feature of the Fluke 51 is its fast response time, allowing users to obtain readings within seconds, which is essential for time-sensitive applications. The device is equipped with a large, easy-to-read LCD display that shows clear numerical values, ensuring users can read measurements from a distance or in difficult lighting conditions. Additionally, the display includes a hold function, enabling users to freeze the reading for easier observation.

In terms of data management, the Fluke 51 provides the option to store and recall temperature readings, facilitating efficient documentation and analysis. Its rugged design, resistant to dust and moisture, makes it suitable for use in demanding environments, ensuring durability and longevity.

The Fluke 51 is powered by standard AA batteries, giving it an extended operational lifespan. It also features a low battery indicator, helping users to manage power effectively and avoid unexpected downtime. The device is compact and lightweight, fitting comfortably in the hand and allowing for easy transport.

Another important aspect is its user-friendly interface, which includes intuitive buttons for quick navigation through settings and options. This design consideration enhances usability, allowing even novice users to operate the thermometer efficiently.

In summary, the Fluke 51 digital thermometer combines precision, durability, and ease of use, making it an essential tool in various professional settings. With its wide temperature range, thermocouple compatibility, fast response time, and robust design, the Fluke 51 is positioned as a reliable instrument for accurate temperature measurements wherever the task may take you.
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