Voltage Measurement Configuration

Chapter 4 Features and Functions

To connect voltage sources to the module’s screw terminals, see page 21.

This section contains information to help you configure the instrument for making voltage measurements. The instrument can measure dc and true RMS ac-coupled voltages on the measurement ranges shown below.

100 mV

1 V

10 V

100 V

300 V

Autorange

DC Input Resistance

Normally, the instrument’s input resistance is fixed at 10 MΩ			for all
dc voltage ranges to minimize noise pickup. To reduce the effects of
measurement loading errors, you can set the input resistance to greater				4
than 10 GΩ for the 100 mVdc, 1 Vdc, and 10 Vdc ranges.				4
Applies to dc voltage measurements only.

Input Resistance	Input Resistance	Input Resistance
Setting	100 mV, 1 V, 10 V ranges	100 V, 300 V ranges

Input R Auto OFF	10 MΩ	10 MΩ
Input R Auto ON	> 10 GΩ	10 MΩ

•The instrument selects 10 MΩ (fixed input resistance on all

dc voltage ranges) when the measurement function is changed or after a Factory Reset (*RST command). An Instrument Preset (SYSTem:PRESet command) or Card Reset (SYSTem:CPON command) does not change the input resistance setting.

•Front-Panel Operation: First, select the dc voltage function on the active channel. Then, go to the Advanced menu and select 10 MΩ (fixed resistance for all dc voltage ranges) or >10 GΩ . The default is 10 MΩ .

INPUT R >10 G

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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.

Agilent Technologies 34970A manual Voltage Measurement Configuration, DC Input Resistance

Models: 34970A