Fluke 52, 51, 54, 53 service manual Menu on the display changes to CAL A-d

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51, 52, 53, 54 Series II

Service Manual

Calibration button access

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Figure 4. Calibration Button Access

3. The menu on the display changes to “ CAL A-d”.

Note

Within CAL are four menu options that may be accessed by pressing E:

∙CAL A-dprompts the operator for the A/D calibration inputs in mV dc.

∙CAL rEF allows the operator to calibrate the reference junction at a known temperature.

∙CAL donE saves the new calibration constants in memory.

∙CAL Abrt ignores calibration changes (turning the thermometer off while in CAL will also ignore calibration changes).

4.Press K or N to select different menu options.

5.With CAL A-dselected, press E. The thermometer prompts “80”. Set the calibrator to +80.000 mV and allow the output to stabilize.

Note

For steps 6 and 8, keep hand and body motion to a minimum while the thermometer takes A/D readings.

6.Press E. Wait while it takes A/D readings.

7.When the thermometer prompts for “-8”, set the Calibrator to -8.0000 mV. Allow the output to stabilize.

8.Press E on the thermometer and wait while it takes A/D readings. The thermometer now shows the measured value in the bottom portion of the display. Millivolts appears on the left side and microvolts appears on the right side.

9. If the measurement is from –7 995.0 to –8 005.0, press E and the meter will return to the calibration menu and display CAL rEF. If the measurement is outside – 7995.0 to –8005.0, press E once to return to the calibration menu. Using

K or N, select CAL A-dand try the A/D calibration procedure a second time starting at step 5.

10.Using K or N, select “ CAL donE”, then press E to store the calibration in memory.

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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 ElectricalPerformance Test and Calibration Required Test Equipment Performance TestsDisplay Test 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 Basic Maintenance Cleaning the ThermometerChanging the Batteries 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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