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Vacuum Measurement and control systems - Edwards (formely known as BOC Edwards) vacuum guages

Edwards (formerly BOC Edwards) WRG Active Wide Range Gauge

Atmosphere to 10^-9mbar

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. It's 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 an Edwards (formerly known as BOC Edwards) controller or directly integrated into the system controls.

Edwards (formerly BOC Edwards) WRG Active Wide Range Gauge

Features and Benefits

Microprocessor signal processing gives seamless transition between Pirani and magnetron outputs as well as linear output (log pressure scale)
Automatic vacuum setting of Pirani gauge element
Single push button atmosphere setting
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
Extended service intervals and gauge lifetime, through reduction of HT voltage after ignition and low discharge current
D-type version including cable strain relief and enhanced ingress protection (IP44)
Low magnetic field version (SL) available for particularly sensitive applications, eg. Mass spectrometry and microscopy
Ultra compact, featuring resessed electrical connector
Easy service; both Pirani and magnetron elements are individually replaceable
Comprehensive failure mode diagnostics facility

Technical specification

Pressure range: Atmosphere to 10^-9 mbar/Torr
Accuracy*: Typically ±15% <100mbar and ±30% <10^-3mbar
Maximum overpressure: 6 bar absolute (87 psi)
Power Supply: +14.5 to +36 V d.c.
Power consumption: 2W (max)
Output signal: 1.8 to 10.2 V d.c.
Set point: Open collector transistor
Maximum voltage: 40 V d.c.
Current: 100mA max
Temperature range:
Operating temperature: +5 to +60 ºC
Storage temperature: 0 to +70 ºC
Materials exposed to vacuum:
Stainless Steel (AISI 304, 306 and 347) fluoroelastomer, soda lime glass, Tunsten, trace of Nickel and Nickel Iron
Internal volume: NW: 26 cm³
Weight: .8kg
External interface connector:
'S' 'SL' and 'CF' versions: 8 way FCC68(RJ45) socket
'D' version: 9 way D-type plug (pins)
Interface cables:
'S' 'SL' and 'CF' versions: Use range of active gauge cables
'D' version: To be supplied by customer (special adaptor cable available)
Vacuum fitting: NW25 or DN40CF
Standards
Electronic design: BS EN 61010-1
Eletromagnetic compatibility: EN 61326 Industrial location Class B emissions
Flame resistant casing: UL 94 (V0)
Enclosure rating:
'S' and 'SL' versions: IP 40
'D' version: IP 44
Pin allocation:
1: power supply positive
2: power supply common
3: Gauge output
4: Gauge indentification
5: Signal common
6: Set point output
7: Atmosphere calibration
8: Not connected

Ordering information