2620A, 2625A

Users Manual

Resistance and RTD

For all channels (0 through 20), 2-terminal resistance or RTD measurements are allowed. Four-terminal measurements can be made on channels 1 through 10 only. Refer to Figure 3-3.

For each channel configured for 4-terminal measurements (channels 1-10 only), a second channel (numbered 10 higher than the first) becomes unavailable for any other type of measurement. For example, using channel 7 to make 4-terminal resistance measurements requires the use of input terminals for both channels 7 and 17. Channel 17 cannot be used to take any other measurements as long as channel 7 remains configured for 4- terminal measurements.

Table 3-14. Thermocouple Ranges

Positive Lead

Type

Material

 

 

J

Iron

K

Chromel

E

Chromel

T

Copper

N

NISIL-

 

NOCROSIL

 

 

Positive Lead Color

(ANSI)

(IEC)

 

 

WHITE

BLACK

YELLPW

GREEN

PURPLE

VIOLET

BLUE

BROWN

 

 

Negative Lead*

Material

Constantan

Alumel

Constantan

Constantan

Usable Range

(°C)

-210 to 760 -270 to 1372 -270 to 1000 -270 to 400 -270 to 1300

R

S

B

Platinum

Platinum

Platinum

(30% Rhodium)

BLACK

BLACK

GRAY

ORANGE

ORANGE

Platinum

(13% Rhodium)

Platinum

(10% Rhodium)

Platinum

(6% Rhodium)

0 to 1767

0 to 1767

0 to 1820

C**

Tungsten

WHITE

 

 

 

Tungsten

(26% Rhenium)

0 to 2316

*ANSI negative lead always RED, IEC negative lead always WHITE

**Hoskins Engineering Co.

Use the following procedure for resistance or RTD measurement connections to the Input Module:

1.Remove the Input Module from the rear panel.

2.Loosen the two large screws on top and open the module.

3.Connect wires to H (high) and L (low) terminals for each channel (channel 7 for 2- terminal configuration or channels 7 and 17 for 4-terminal configuration, in this example.)

4.Thread these wires through the strain-relief pins and out the back of the module. Refer to Figure 3-2.

5.Close the module cover, secure the screws, and put the module back in the instrument.

3-20

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Fluke 2625A, 2620A Resistance and RTD, Thermocouple Ranges Positive Lead Type Material, Positive Lead Color, Usable Range
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2625A, 2620A 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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