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PLC-based X-ray Thickness Measurement

The Perfecta Gauge is a high performance X-ray thickness gauge that features the industry’s first open architecture. Designed on a PLC platform, its combination of advanced technologies make Perfecta gauges accurate, versatile and robust; they consistently outperform most other gauges on the market.

Wherever possible, it has been built with broadly available hardware and software components, including off-the-shelf PLC, PC, networking protocols and software. This reduces both initial costs as well as drastically cutting maintenance costs. The Perfecta Gauge is intended for use as a control gauge for Rolling Mill and Process Line applications and is suitable for measuring the thickness of a variety of metallic and non-metallic materials.

The Perfecta Gauge is available in Centerline, Scanning, and Profile configurations.

The Perfecta features:
Enhanced Accuracy & Dependability
Industrial PLC-based design, using widely available off-the-shelf components
Easily connected to other industrial equipment or business networks.
Minimal quantity of custom interface and control boards.
Using proven GHF generators, designed and manufactured by Global Gauge Corporation (from 30 kV- 250 kV).
PMT or Ion chamber detectors, designed and manufactured by Global Gauge Corporation.
Compensation functions including; aIloy, temperature, pass height/angIe, etc.
Calibrated/traceable thickness standards.

Gauge Specifications:

Response time:
The response time is a measure of the time lag between the actual change in a measured thickness and the corresponding change in the gauge's voltage output (AGC output). Typically this is measured at a baseline thickness of 0. 100" of steel. For the Perfecta, the response is adjustable to less than 10 milliseconds, offering excellent production control.

Statistical Noise:
Random variation of the gauge signal 90% of the time, while gauging on a static sample. Noise is expressed as a percentage of the nominal thickness being measured. For steel, with an air gap of 12", at a response of 10 milliseconds, typical measured noise is +/- 0.10%.

The accuracy of the gauge is within +/- 0.10% of the set thickness of the precision master on which the gauge has been standardized.

The drift of the gauge signal as recorded on a chart recorder during an eight-hour period will not vary more than +/- 0.10% from the set thickness. (This assumes that the gauge is warmed-up for at least two hours, and that C-frame cooling is active to offset ambient thermal transients.)