Chapter 3 System Overview

Data Acquisition System Overview

The system configuration shown on the previous page offers the following advantages:

•You can use the 34970A to perform data storage, data reduction, mathematical calculations, and conversion to engineering units.

You can use the PC to provide easy configuration and data presentation.

•You can remove the analog signals and measurement sensors from the noisy PC environment and electrically isolate them from both the PC and earth ground.

• You can use a single PC to monitor multiple instruments and

3

measurement points while performing other PC-based tasks.

The Computer and Interface Cable

Since computers and operating systems are the subject of many books and periodicals, they are not discussed in this chapter. In addition to the computer and operating system, you will need a serial port (RS-232) or GPIB port (IEEE-488) and an interface cable.

Serial (RS-232)

GPIB (IEEE-488)

 

 

 

 

Advantages

Disadvantages

Advantages

Disadvantages

 

 

 

 

Often built into the computer;

Cable length is limited

Speed; faster data and

Cable length is limited

no additional hardware is

to 45 ft (15 m). *

command transfers.

to 60 ft (20 m). *

required.

 

 

 

 

 

 

 

Drivers usually included in

Only one instrument or

Additional system flexibility,

Requires an expansion

the operating system.

device can be connected

multiple instruments can

slot plug-in card in PC

 

per serial port.

be connected to the

and associated drivers.

 

 

same GPIB port.

 

 

 

 

 

Cables readily available

Cabling is susceptible to

Direct Memory Transfers

Requires special cable.

and inexpensive.

noise, causing slow or

are possible.

 

The 34970A is

lost communications.

 

 

 

 

 

shipped with a serial cable

Varying connector pinouts

 

 

(if internal DMM is ordered).

and styles.

 

 

 

 

 

 

 

Data transfers up to

Data transfers up to

 

 

85,000 characters/sec.

750,000 characters/sec.

 

 

 

 

 

*You can overcome these cable length limitations using special communications hardware.

For example, you can use the Agilent E5810A LAN-to-GPIB Gateway interface or a serial modem.

51

Page 52 Page 54
Page 53
Image 53
Agilent Technologies 34970A manual Computer and Interface Cable, Data Acquisition System Overview, Advantages Disadvantages
Page 52 Page 54

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.
Top Page Image Contents