Introduction
The Model 455 digital signal processing (DSP) gaussmeter combines the technical advantages of DSP technology with many advanced features at a moderate price. DSP technology creates a solid foundation for accurate, stable, and repeatable field
measurements. Advanced features including DC to 20 kHz AC frequency range, peak field detection to 50 µs pulse widths, DC accuracy of 0.075%, and up to 5¾ digits of display resolution make the Model 455 ideal for both industrial
and research applications. For added functionality and value, the Model 455 includes a standard Lake Shore Hall probe.
DC measurement mode
Static or slowly changing fields are measured in DC mode. In this mode, the Model 455 takes advantage of the internal auto zero function and probe linearity compensation to provide a basic DC accuracy of ±0.075%. Measurement resolution
is enhanced by advanced signal processing capability, allowing users the choice of reading rates to 30 readings per second or high resolution to 5¾ digits. Front-end amplification specifically designed to complement DSP data acquisition
provides high stability and repeatability. That, along with probe temperature compensation, provides superior stability ideally suited for demanding DC measurement applications such as field mapping.
RMS peak mode
Periodic AC fields are measured in RMS mode. The Model 455 provides an overall RMS frequency range of 10 Hz to 20 kHz and is equipped with both narrow and wide band frequency modes. While in narrow band mode, frequencies above 1 kHz are filtered
out for improved measurement performance. The exclusive DSP algorithms free the Model 455 from the limitations of conventional RMS conversion hardware and provide for an excellent dynamic range, resolution, and frequency response.
Peak measurement mode
Pulsed fields are measured in Peak mode, which is a natural extension of the high-speed data acquisition necessary for DSP operation. Fast instrument sample rates permit capture of positive and negative transient fields as narrow as 50 µs
pulse widths. The peak reading can be held for an unlimited length of time with no sag. This is ideal for most magnetizers and other fast pulse applications. The Model 455 can also be configured to follow the peak of a periodic waveform for
evaluation of crest factor.
The probe connection
The Model 455 is only half of the magnetic measurement equation. For the complete solution, Lake Shore offers a full complement of standard and custom Hall effect probes in a variety of sizes and sensitivities. See the table of stock probes recommended
for use with this gaussmeter. We also offer other probes.
If you don’t see the probe you need, give us a call.
