Chapter 3 System Overview

Data Acquisition System Overview

Plug-In Modules

The 34970A offers a complete selection of plug-in modules to give you high-quality measurement, switching, and control capabilities.

The plug-in modules communicate with the floating logic via the internal isolated digital bus. The multiplexer modules also connect to the internal DMM via the internal analog bus. Each module has its own microprocessor to offload the mainframe processor and minimize backplane communications for faster throughput. The table below shows some common uses for each plug-in module.

For more information on each module, refer to the module sections in chapter 4, starting on page 163.

Model Number

Module Name

Common Uses

 

 

 

 

Measurement Input

 

 

 

34901A

20-Channel Mux with T/C

Scanning and direct measurement of

 

Compensation

temperature, voltage, resistance, frequency,

 

 

and current (34901A only) using the

34902A

16-Channel Reed Mux with T/C

internal DMM.

 

Compensation

 

34908A

40-Channel Single-Ended Mux

Scanning and direct measurement of

 

with T/C Compensation

temperature, voltage, and resistance using

 

 

the internal DMM.

 

 

 

34907A

Multifunction Module

Digital Input, Event Counting.

 

 

 

 

Signal Routing

 

 

 

34901A

20-Channel Mux with T/C

Multiplexing of signals to or from external

 

Compensation

instruments.

34902A

16-Channel Reed Mux with T/C

 

 

Compensation

 

 

 

 

34908A

40-Channel Single-Ended Mux

 

 

with T/C Compensation

 

 

 

 

34904A

4x8 Matrix Switch

32 Crosspoint Matrix switching.

 

 

 

34905A

Dual 4-Channel RF Mux (50Ω )

50Ω high-frequency applications (< 2 GHz).

 

 

 

34906A

Dual 4-Channel RF Mux (75Ω )

75Ω high-frequency applications (< 2 GHz).

 

 

 

 

Control Output

 

 

 

34903A

20-Channel Actuator

General-purpose switching and control

 

 

using Form C (SPDT) switches.

 

 

 

34907A

Multifunction Module

Digital Output, Voltage (DAC) Outputs.

 

 

 

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Agilent Technologies 34970A manual Plug-In Modules, Model Number Module Name Common Uses, Signal Routing
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34970A specifications

Agilent Technologies 34970A is a versatile data acquisition and measurement system that has gained popularity in various industries, including research and development, manufacturing, and education. The primary purpose of the 34970A is to offer an efficient solution for data collection, monitoring, and analysis, which can significantly enhance productivity and accuracy in testing applications.

One of the main features of the 34970A is its modular design, allowing users to customize the system according to their specific measurement needs. The mainframe can accommodate up to three plug-in measurement modules, which can include various types of measurements such as analog, digital, temperature, and frequency. This modularity provides flexibility for users to tailor the system to their requirements, making it highly adaptable to different applications.

Another notable characteristic of the Agilent 34970A is its impressive channel configuration. The system can support up to 120 measurement channels when fully configured, enabling extensive data acquisition without the need for multiple devices. This capability is essential for applications requiring simultaneous monitoring of multiple parameters or locations.

The 34970A utilizes advanced signal processing technologies to ensure high-accuracy measurements. The internal 6.5-digit resolution multimeter provides precise readings, while the device also supports various input types, such as thermocouples and RTDs for temperature measurements. The ability to perform mathematical functions, such as summation and averaging, on the acquired data further enhances its usability.

For data storage and management, the Agilent 34970A features built-in memory for storing up to 20,000 readings. Users can also easily transfer data to a PC through the RS-232 interface or GPIB (IEEE 488) for further analysis and reporting. Additionally, it offers the capability to program automatic data logging and scheduling of measurements, which streamlines the testing process and reduces manual intervention.

In terms of user interface, the 34970A is equipped with a large graphical display that provides clear visualization of measurement data and easy navigation through settings and options. The menu-driven interface makes it accessible for users of all skill levels, simplifying the setup and operation of the device.

Overall, the Agilent Technologies 34970A stands out for its modularity, high channel capacity, advanced measurement technologies, and user-friendly interface. As a reliable and efficient data acquisition system, it is well-suited for a wide range of applications, making it an essential tool for engineers and technicians looking to enhance measurement precision and efficiency.
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