Digital Pressure Controller calibrates low-pressure gauges.

Press Release Summary:

Model 7250LP incorporates 0-10 in. H2O range and 0-30 in. H2O range into one instrument and maintains set-point pressure to within ±0.0004 in. H2O. In Active mode, unit continuously controls set-point and corrects for small leaks and temperature effects. In Passive mode, user defines upper and lower limits where controller will deactivate once pressure is within limit settings. IEEE-488 and RS-232 interfaces are provided for automation via PC control.

Original Press Release:

GE Introduces New Low Pressure Digital Pressure Controller

Summary: GE Calibrator Designed for Accurate and Automated Testing/Calibration of Low Pressure, Draft Range Sensors, Gauges and Instruments

New Fairfield, Connecticut - June 4, 2003 - - GE Ruska, a business unit of GE Industrial Systems and the General Electric Company (NYSE: GE) has announced the immediate availability of the Model 7250LP Low Pressure Digital Pressure Calibrator which is specifically designed for calibrating low pressure gauges such as Magnehelic® type gauges, draft range pressure sensors and transducers portable calibrators, and other devices in the inches of water pressure range.

The new 7250LP Series provides a highly accurate method of calibrating low pressure devices by incorporating two ranges into one instrument: a 0 to 10 inH2O range and a 0 to 30 inH2O range with a precision of 0.005% of each range (+/-0.0005 inH2O when using the 10 inH2O range). For draft range devices that measure both positive and negative pressure, the 7250LP can be provided with the negative gauge/vacuum option allowing it to automatically control to both +30 inH2O and -30 in H2O.

In addition to ultimate accuracy, the 7250LP is able to maintain the set-point pressure to within +/-0.0004 inH2O, providing the control stability required to calibrate virtually any low-pressure device. In addition to the 10/30 inH2O range combination, the 7250LP can be provided with internal ranges of 0 to 20 inH2O and 0 to 60 inH2O, or 0 to 35 inH2O and 0 to 100 inH2O. Three different range combinations provide maximum flexibility for any low-pressure calibration application.

The new Model 7250LP is a recent addition to the popular 7250 Digital Pressure Controllers that are available in ranges from 0-5 psi to as high as 0-3000 psi. The Series 7250 can incorporate multiple ranges in one instrument to provide 0.005% of reading performance from 5% to 100% of the instruments range. The Series 7250 represents the 5th generation automated pressure controller from GE Ruska and is the result of over 30 years of customer input, application experience, engineering technology and manufacturing capability.

For ease of use, the 7250LP utilizes an active matrix, full color screen with a large, 6.4 inch Spanish and Chinese. The 7250LP also features two user selectable control modes, Active mode and Passive mode.

In Active mode, the 7250LP will continuously control the set-point and correct for small leaks and temperature effects that may be present in the system. In Passive mode, the user is able to define an upper and lower limit around the set-point where the controller will deactivate once the pressure is within the limit settings. In a leak free and temperature stable system, no additional uncertainty or instability is contributed to the test or calibration.

The 7250LP is supplied with both an IEEE-488 and RS-232 interface for automation via PC control. GE Ruska´s CalManager II software can further assist with complete automation of the calibration process. Or, a user can take advantage of the optional MET/CAL® or LabVIEW® driver. The 7250LP is also provided with a NIST traceable calibration certificate, or Ruska can optionally provide a NVLAP accredited calibration certificate to those companies who require an accredited supplier.

Magnehelic® is registered by Dwyer. MET/CAL® is registered by Fluke.
LabVIEW® is registered by National Instruments.

About GE Measurement
GE Ruska, part of GE Industrial Systems´ Measurement business, is a leading manufacturer of pressure measurement standards, with products used throughout the world in industrial, government, military, and scientific applications. Established in 1944, GE Ruska is a also leader in pressure calibration services.

GE Measurement is an industry leader in the design and manufacture of precision temperature, humidity and pressure sensors, field calibrators and measurement instrumentation. With operations around the world, GE Measurement develops technologies and solutions using thermal validation, dew point measurement, gas flow measurement, control circuit protection, liquid level detection, and microstructure design for products and services in applications such as environmental, marine, meteorology, aerospace, defense, medical, pharmaceutical, biotechnology, automotive, industrial, commercial, petrochemical, power generation and transportation.

About GE Industrial Systems
GE Industrial Systems spans the globe as an industry leader in integrated industrial equipment, systems and services. The business brings to customers the latest technological products used to distribute, protect and control electrical power and equipment, and provides innovative product and service solutions for commercial, industrial, residential and utility applications. For more information visit the website at

For more technical information on GE Ruska, contact:
Jim Henke
Tel: +1.713.975.0547

For more information on GE Measurement, contact:
Gary Pacilio
Tel: +1.732.287.2870

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