AGILENT 35670A

Supplemental Operator’s Guide

Section 17 : Two-Channel Absolute and Differential Amplitude Measurement

Measuring the relative motion between points on a machine can provide information regarding clearances and forces. These measurements may also demonstrate a susceptibility of a machine to a particular mode of vibration.

Absolute motion can be measured as a power spectrum, with units of peak-to-peak displacement in mils. Relative motion is measured as the vector difference between two channels. It also can be displayed with units of peak-to-peak displacement in mils.

When acquiring these measurements, it is very important to know the relative polarity of each transducer. If their polarity is opposite, then the signals must be added, not subtracted, to obtain differential motion.

The best technique is to use two identical accelerometers. If the transducers are not the same model, then it is best to determine their relative polarity.

Accelerometer Polarity

To determine the polarity of two accelerometers, follow these steps:

•Press the green [Preset] hardkey

•Press [DO PRESET] softkey (F1).

•Press the [Pause/Cont] hardkey if desired.

•Press the [Freq] hardkey

•Enter 3200 and then press the [Hz] softkey (F2).

•Press the [Input] hardkey.

•Press the [ALL CHANNELS] softkey (F2).

•Select the [CH* AUTO UP ONLY] softkey (F5).

Set up transducer parameters as described in the section “Measuring with Transducers.” Then follow these steps to display a time trace of the two accelerometers:

•Press the [Disp Format] hardkey.

•Press the [UPPER/LOWER] softkey (F3).

•Press the [Active Trace] hardkey.

•Press the [A] softkey (F1)

•Press the [Meas Data] hardkey.

• Press the [CHANNEL 1 2 3 4] softkey (F1) until 1 is highlighted.

•Press the [TIME CHANNEL 1] softkey (F5)

•Press the [Scale] hardkey.

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Agilent Technologies Agilent 35670A Two-Channel Absolute and Differential Amplitude Measurement, Accelerometer Polarity
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Agilent 35670A specifications

Agilent Technologies Agilent 35670A is a prominent and versatile dynamic signal analyzer designed for various applications in vibration testing, structural analysis, and noise measurement. Engineered to meet the rigorous demands of engineers and researchers, the 35670A is especially valued for its advanced features and functionalities that facilitate detailed analysis and troubleshooting.

One of the primary features of the Agilent 35670A is its ability to perform real-time signal analysis. The instrument is equipped with a powerful processing engine that handles large amounts of data efficiently, providing fast and accurate results. This real-time capability is critical for dynamic testing applications, allowing engineers to monitor and analyze signals as they occur, thereby facilitating quicker decision-making and problem identification.

The Agilent 35670A employs advanced Fast Fourier Transform (FFT) algorithms, which provide high-resolution spectral analysis. This feature is essential for engineers needing to identify frequency components in complex signals, making it particularly useful in the fields of acoustics and mechanical engineering. The analyzer supports various types of measurements, such as magnitude and phase, enabling users to delve deeply into their data.

Another key technology embedded in the Agilent 35670A is its ability to perform multi-channel measurements. The instrument can connect to a variety of external sensors and testing devices, making it a flexible choice for users who need to analyze multiple signals simultaneously. This multi-channel feature is particularly advantageous in automotive testing, aerospace applications, and structural health monitoring.

The device also comes equipped with a user-friendly graphical interface, enhancing the overall user experience. The interface facilitates easy navigation and access to various measurement modes, settings, and data visualizations. Additionally, the Agilent 35670A supports automated measurements, allowing users to save time and reduce human error in repetitive testing scenarios.

Furthermore, the Agilent 35670A offers extensive connectivity options, including GPIB and USB interfaces, making it easy to integrate into existing laboratory setups and automated testing systems. This flexibility ensures that users can adapt the analyzer to their specific needs and workflow processes.

In summary, the Agilent 35670A stands out as a sophisticated dynamic signal analyzer that combines advanced signal processing technologies with user-friendly features. Its real-time analysis, multi-channel capabilities, and extensive connectivity options make it an invaluable tool for professionals in various engineering fields, dedicated to achieving precision in their analyses and solutions.
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