AVW100 Vibrating Wire Interface

The AVW100 interface is an active version of the AVW1 Vibrating Wire Interface designed by engineers at Slope Indicator of Washington State, USA. The general principles of operation are the same as the AVW1/4; please refer to the AVW1/4 manual supplied for general information. This document describes the differences between the AVW100 and the AVW1 and where to find further information on the use of the AVW100 with specific sensors.

1. Differences in Specification

Physically the AVW100 is identical to the AVW1 but electronically it differs in that it uses active circuitry, including electronic filters and amplifiers to precondition the vibrating wire signal. This allows the use of smaller, lower output sensors and sensors which can have a wider range of signal frequencies. The specifications on its inputs are:

•The minimum detectable signal level is approximately 0.5mV peak to peak (250 - 9900Hz), 0.1mV (500 - 5000Hz). (The signal output to the datalogger is amplified and conditioned to a +/-2.5V square wave.)

•It has an extended frequency range of 250-9900Hz compared to the AVW1.

•It has a fixed output drive of 4.8V peak-to-peak.

Users need to be aware that the high-gain active circuitry results in two other functional differences:

•The AVW100 consumes approximately 3mA of current continuously which may need to be taken into consideration in low-power applications.

•The high gain means there is inherent extra sensitivity to noise, particularly (but not solely) in the sensing frequency range (the interface can be affected by much higher frequencies that have harmonics or which are modulated in the sensing frequency range).

NOTE: The extra noise sensitivity can be an issue in some applications. To help avoid such problems, take extra care in the screening of both the sensor and the cables to avoid electronic noise pickup. If possible, connect the sensor body to a grounding point, and consider using cables with individually screened pairs. In installations where high frequency noise is causing disturbance to the measurements, inductors or specialised signal filters may be required to block the noise.

2. Differences in Programming

The AVW100 can be used with exactly the same datalogger instructions as the AVW1/4, i.e. instruction P28 or P131 in the CR510, CR10X or CR23X dataloggers or the VibratingWire instruction in the CR1000 and CR5000 dataloggers. Details of both instructions can be found in the relevant datalogger manuals and the on-line help in the program editors.

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Campbell Hausfeld specifications AVW100 Vibrating Wire Interface, Differences in Specification
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AVW100 specifications

The Campbell Hausfeld AVW100 is a versatile and efficient air compressor that has gained popularity among both professional tradespeople and DIY enthusiasts. Known for its reliability and performance, the AVW100 is designed to handle a wide range of tasks, from inflating tires to powering pneumatic tools.

One of its standout features is its robust 1-gallon vertical tank, which ensures that users have a consistent air supply without taking up much space. The compact design makes it ideal for workshops, garages, and even home use, allowing operators to save valuable floor space while still achieving powerful performance.

The AVW100 is equipped with a powerful 1 HP motor, enabling it to deliver a maximum psi of 115. This capability is essential for sustaining various applications, including nail guns, sanders, and spray guns. With an impressive flow rate of 0.8 CFM at 90 psi, the compressor ensures that tools run smoothly and efficiently, minimizing downtime during projects.

Another notable technology included in the Campbell Hausfeld AVW100 is its oil-free pump system, which offers the convenience of low maintenance. Users can focus more on their projects without worrying about regular oil changes, making it an attractive option for those seeking hassle-free operation. The oil-free design also results in cleaner airflow, which is crucial when working in environments where air purity is a concern.

Safety is a priority with the AVW100, featuring a thermal overload protection system that prevents the motor from overheating during prolonged use. This feature not only prolongs the life of the compressor but also ensures that users can work confidently without fear of potential damage or accidents.

In terms of portability, the AVW100 is designed with a handle and lightweight construction, allowing users to easily transport it from one job site to another. The compressor’s durable rubber feet provide stability during operation while protecting surfaces from scratches.

Overall, the Campbell Hausfeld AVW100 is a well-rounded air compressor, combining power, convenience, and safety features in a compact design. Whether you are a seasoned professional or a weekend warrior, the AVW100 is a valuable addition to any toolkit, ensuring you have the air power needed for a variety of tasks efficiently.
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