Function Relays | Fluke 2635A, 2625A specs

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Table 2-4. Analog Measurement Processor Pin Descriptions (cont)

Name

SUM

B.1

B.32

B3.2

VREF+ VREF-

RAO

RA+

RA-

AFO

MOF

AFI

FAI

FAO

RMSF AGND3

RMSG 2 RMSO CAVG

VSSR RMSG 1 RMSI

Description

Integrator summing node

Buffer output, 100 mV range

Buffer output, 300 mV range

Buffer output, 1000 mV range

Buffer output, 3V range

A/D voltage reference plus A/D voltage reference minus A/D reference amplifier output

A/D reference amplifier noninverting input A/D reference amplifier inverting input

Passive filter 2

Passive filter 1 plus resistance

Passive filter 1

Filter amplifier inverting input

Filter amplifier output

RMS output, filtered

(not used, connected to filtered -5.4V dc) (not used)

RMS converter output (not used)

-5.4V dc, filtered

(not used, pulled to filtered -5.4V dc) (not used)

2-52. Input Signal Conditioning

Each input is conditioned and/or scaled to a dc voltage appropriate for measurement by the a/d converter. DC voltage applied to the a/d converter can be handled on internal ranges of 0.1V, 0.3V, 1V, or 3V. Therefore, high-voltage dc inputs are scaled, and ohms inputs are converted to a dc voltage. Line voltage level ac inputs are first scaled and then converted to a dc voltage. Noise rejection is provided by passive and active filters.

2-53. Function Relays

Latching relays A3K15, A3K16, and A3K17 route the input signal to the proper circuit blocks to implement the desired measurement function. These relays are switched when a 6-millisecond pulse is applied to the appropriate reset or set coil by the NPN Darlington drivers in IC A3U10. The A/D Microcontroller A3U9 controls the relay drive pulses by setting the outputs of port 6. Since the other end of the relay coil is connected to the VDDR supply, a magnetic field is generated, causing the relay armature and contacts to move to (or remain in) the desired position. Function relay states are defined in Table 2-5.

2-20

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.

Fluke 2635A, 2625A Function Relays, Analog Measurement Processor Pin Descriptions Name

Models: 2635A 2625A