WRG Wide Range Gauge

 

Overview

The Wide Range Gauge (WRG) family offers the capability of single port pressure measurement in the range atmosphere to 10-9 mbar with a linear output. Its a compact solution, halving the space and connectivity hardware requirement, which can be all important in many applications. The WRG has many novel features, including a new patented striker, pushbutton calibration and set point controls and comprehensive diagnostics. The WRG is a cost-effective vacuum management solution when used either with a Edwards controller or directly integrated into the system controls.

Technology

The WRG is a combination gauge, using Pirani technology for the upper pressure range, with a seamless switch over to an inverted magnetron for the lower range.

For ease of operation and more accurate pressure reading, the vacuum setting of the Pirani gauge is set automatically, while a single pushbutton sets atmospheric pressure. The WRG has an easy-to-program set-point which operates over the entire measurement range.

The magnetron uses an advanced technique for highly reliable striking, even at high vacuum or in relatively contaminated conditions. To optimize the lifetime of the gauge, the magnetron HT voltage is reduced after ignition and the magnetron operates with a low discharge current.

The WRG meets EMC requirements for both light industrial emissions and heavy industrial immunity.

Applications

  • Any vacuum system where there is a need to measure pressure over a wide range. The WRG with an AGD represents a very simple and cost effective means of achieving this.
  • The linear output and equation make WRG’s an attractive option for industrial OEM’s where the gauge may be directly integrated into the process controller.
  • The WRG is suitable for a wide range of HV and UHV applications, however if your process will spend a significant amount of time between 5x10-4 and 5x10-3mbar then Edwards recommend using independent APG100 Pirani and AIM Penning gauges, as this will improve gauge reliability for your application.

Features and Benefits

  • Microprocessor signal processing gives seamless transition between Pirani and magnetron outputs as well as linear output (log pressure scale)
  • D-type version including cable strain relief and enhanced ingress protection - IP44
  • Low magnetic field version (SL) available for sensitive applications e.g. mass spectrometry and electron microscopy
  • Easily programmed set point covering entire measuring range
  • Magnetron uses an advanced patented technique for highly reliable striking, even at high vacuum or in relatively contaminated conditions
  • Automatic vacuum setting of Pirani gauge element
  • Single push button atmosphere setting
  • Extended service intervals and gauge lifetime, through reduction of HT voltage after ignition and low discharge current
  • Ultra compact, featuring recessed electrical connector
  • Easy service; both Pirani and magnetron elements are individually replaceable
  • Comprehensive failure mode diagnostics facility
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