AGILENT 35670A

Supplemental Operator’s Guide

Section 11 : Modal Testing Using a Hammer and Accelerometer

Hammer testing is often the easiest and quickest technique for measuring frequency response functions used in modal analysis. Instructions for using a hammer with a force transducer and an accelerometer to measure frequency response functions are presented.

Setting Up the Transducer Parameters

Connect the force transducer on the hammer to Channel 1. Mount the response accelerometer to the desired location on the structure, and connect it (or its preamplifier) to Channel 2. Preset the analyzer and set up transducer parameters as follows, assuming an ICP accelerometer with a sensitivity of 11 mV/g and an ICP force transducer on the hammer with a sensitivity of 5 mV/lb:

Press the green [Preset] hardkey

Press [DO PRESET] softkey (F1).

Wait for the analyzer to finish its preset routine.

Press the [Pause/Cont] hardkey to pause the current measurement.

Set up the force transducer parameters as follows:

Press the [Input] hardkey

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

Press

[FRONT END CH1 SETUP] softkey (F7).

Press

[ICP SUPLY ON OFF] softkey (F8) until ON is highlighted.

Press the [Input] hardkey.

Press the [XDCR SENSITVTY] softkey (F6).

Enter 5, then press the [mV/EU] softkey (F2).

Toggle the [XDCR UNIT ON OFF] softkey (F4) until ON is highlighted.

Press the [XDCR UNIT LABEL] softkey (F7).

Press the [MORE CHOICES] softkey (F9).

Select the [ lb ] softkey (F6).

[XDCR UNIT CH1 SETUP] softkey (F8)

Set up the accelerometer parameters as follows:

Press the [Input] hardkey.

Press

[CHANNEL 1

2 3 4] softkey (F1) until 2 is highlighted.

Press [FRONT END CH2 SETUP] softkey (F7).

Press

[ICP SUPLY ON OFF] softkey (F8) until ON is highlighted.

Press the [Input] hardkey.

Press [XDCR UNIT CH2 SETUP] softkey (F8)

Press the [XDCR SENSITVTY] softkey (F6).

Enter 11, then press the [mV/EU] softkey (F2).

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Agilent Technologies Agilent 35670A Modal Testing Using a Hammer and Accelerometer, Setting Up the Transducer Parameters

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.