51, 52, 53, 54 Series II

Service Manual

Table 3. Performance Test Values (K-Type Thermocouple)

Input

Voltage

Equivalent

Display Reading limits

Step

1

2

3

4

5

(mV DC)

0.0000

0.9193

-5.7297

40.8853

48.8382

 

Temperature

 

 

 

0.0 °C

 

32.0 °F

 

 

 

23.0 °C

 

73.4 °F

 

 

 

-190.0 °C

 

-310.0 °F

 

 

 

990.0 °C

 

1814 °F

 

 

 

1200 °C

 

2192 °F

 

 

 

°C

-0.3 to 0.3

22.7 to 23.3

-189.3 to -190.7

989.2to 990.8

1199 to 1201

°F

31.5to 32.5

72.9to 73.9

-308.9 to -311.1

1813 to 1815

2190 to 2194

Verification of IR Communications Port (Fluke 53 and 54)

This section explains how to verify the operation of the IR Communications Port (IR port). Perform the following procedure using a PC and HyperTerminal. The IR port can also be verified using Flukeview™ software.

To set up a HyperTerminal file, follow these steps:

1.Connect the IR adapter cable to the DB9 Adapter connector. Connect the other end of the DB9 Adapter to a COM port of the PC.

2.Place the Fluke 53 or 54 in front of the IR adapter.

3.Open up a HyperTerminal session. Select Start button, Programs, Accessories,

HyperTerminal.

4.Open up a New Connection with a name like “Fluke 54 IR Test”.

5.When the Connect To box appears, select the COM1 or COM2 (the port that the IR adapter cable is plugged into).

6.Select Port Settings: 9600 baud rate, 8 data bits, no parity, 1 stop bit, and no flow control.

7.Under File, select properties. Verify that the correct port is selected. Click on Configure. Verify that port settings are correct (the baud rate may need to be changed to 9600).

8.Select the Settings tab then click on ASCII Setup. Check the following boxes:

∙Echo typed characters locally

∙Append line feeds to incoming line ends

∙Wrap lines that exceed terminal width

To open a HyperTerminal file to test the IR port, use the following procedure:

1.Under File, select Save As. Use a file name such as “Fluke 54 IR Test” and then click on save.

2.Click on the phone disconnect icon.

3.Click on open folder or under File select Open. Double click on Fluke 54 IR Test.

4.Type in "ID" followed by the Enter key (notice the "ID" is capitalized).

5.The display of the thermometer now shows the thermometer name (Fluke 53-II or Fluke 54-II), and the units operating software version (e.g. Fluke 54-II, V1.01).

8

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Fluke 51, 54, 52 service manual Verification of IR Communications Port Fluke 53, Temperature
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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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