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WRG series
Edwards WRG-D-NW25 Wide Range Gauge, S/S, D14702000
The Edwards WRG-D-NW 25 Wide Range Gauge family offers the capability of single port pressure measurement in the range from atmosphere to 10-9 mbar with a linear output. WRG Gauge P/N D14702000 Its a compact solution, halving the space and connectivity hardware requirement, which can be all important in many applications.
The Edwards WRG Vacuum Gauge has many advanced features, including a new patented striker, easy pushbutton calibration and set point controls and comprehensive diagnostics.
The Edwards WRG Gauge is a low maintenance and cost effective vacuum management solution when used either with a Edwards Gauge controller or directly integrated into the vacuum system controls.
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Edwards WRG-D NW25 Technology:
The Edwards WRG vacuum gauge has two gauges built in one, using Pirani technology for the upper pressure ranges, 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 Edwards Pirani gauge is set automatically, while a single pushbutton sets atmospheric pressure. The Edwards WRG-D-NW25 has an easy to program set-point which operates over the entire measurement range.
The Edwards WRG magnetron Gauge 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 Edwards WRG-D-NW25 meets EMC requirements for both light industrial emissions and heavy industrial immunity.
Edwards WRG-S NW25 Features:
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
| Pressure range | Atmosphere to 10-9 mbar/Torr |
| Accuracy * | Typically ±15% <100 mbar and ±30%<10-3mbar |
| Maximum over pressure | 6 bar absolute (87 psia) |
| Power supply | +14.5 to +36 V d.c. |
| Power consumption | 2 W maximum |
| Output signal | 1.8 to 10.2 V d.c. |
| Adjustments | Atmosphere and setpoint |
| Set point | Open collector transistor |
| Maximum voltage | 40 V d.c. |
| Current | 100 mA maximum |
| Temperature range | |
| Operating | +5 to +60 oC |
| Storage | 0 to +70 oC |
| Materials exposed to vacuum (Both NW and CF versions) | Stainless steel (AISI 304, 316, 321, 347), Fluoroelastomer, soda lime glass, Tungsten, trace of Nickel and Nickel Iron |
| Internal volume | 26 cm3 |
| Weight | 0.8 kg |
| External interface connector | 9 way D-type male |
| Interface cables | Use range of active gauge cables |
| Standards | |
| Electromagnetic compatibility | EN 61326 Industrial Location, Class B emissions |
| Enclosure rating | IP40 |
| Pin allocation ** | |
| 1. Power supply positive | 5. Signal common |
| 2. Power supply common | 6. Set-point output |
| 3. Gauge output | 7. Atmosphere calibration |
| 4. Gauge identification | 8. Not connected |
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