Chapter 5 Remote Interface Reference

Scanning Overview

Scan Memory Commands

You can store up to 50,000 readings in non-volatile memory during a scan. Readings are stored only during a scan and all readings are automatically time stamped. If memory overflows (the MEM annunciator will turn on), a status register bit is set and new readings will overwrite the first readings stored (the most recent readings are always preserved). You can read the contents of memory at any time, even during a scan. Reading memory is not cleared when you read it.

Each reading is stored with measurement units, time stamp, channel number, and alarm status information. You can specify which information you want returned with the readings using the FORMat:READing commands. The following is an example of a reading stored in memory with all fields enabled (relative time is shown).

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1 Reading with Units (26.195 °C)

3 Channel Number

2 Time Since Start of Scan (17 ms)

4 Alarm Limit Threshold Crossed

 

(0 = No Alarm, 1 = LO, 2 = HI)

DATA:POINts?

Count the total number of readings (from all channels in the scan list) currently stored in reading memory from a scan. Returns a value between 0 and 50,000 readings.

DATA:REMove? <num_rdgs>

Read and erase the specified number of readings from non-volatile memory. The readings are erased from memory starting with the oldest reading first. The purpose of this command is to allow you to periodically remove readings from memory during a scan than would normally cause reading memory to overflow (for example, during a scan with an infinite scan count). The output from this command is affected by the FORM:READ commands (see “Reading Format Commands” on page 231).

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Agilent Technologies 34970A manual Scanning Overview Scan Memory Commands, DATAPOINts?, DATAREMove? numrdgs
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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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