Product category:
Temperature, pressure and flow measurement
News Release from: SensorsOne | Subject: Lex-1 digital pressure comparator
Edited by the Laboratorytalk Editorial
Team on 10 January 2007
Reduce pressure calibrating costs for
dial gauges
If your costs are running high in order to maintain ISO9000 adherence for calibrating pressure gauges used on production machinery, maybe it is time to invest in a precision digital manometer
You will dramatically reduce your annual re-calibration charges and there will be no need to maintain a buffer stock of dial pressure gauges to keep manufacturing processes running while other critical production test pressure instruments are sent away for their annual calibration If all analogue pressure gauges are fitted with a three way isolation valve they can be calibrated in-situ by teeing into the pressure gauge with a quick release pressure connection and isolating the device under test
This article was originally published on Laboratorytalk on 23 May 2006 at 8.00am (UK)
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You can then apply pressures with a hand-pump to the pressure gage and calibrate at each set-point.
When setting each pressure calibration point use the cardinal points on the device under test rather than using the pressure calibrator.
This way it is easier to measure the error from the digital pressure gauge fully using the resolution of the digital readout rather than trying to guess the error on the device under test which has a much lower resolution.
Further reading
How low can you go, in the wet?
SensorsOne is adding the Ashdown Control DRS low differential pressure transducer and transmitter for use with wet and dirty gases to its pressure sensor range
Pressure transmitters are just a click away
Gefran TK industrial pressure transmitter is now available from stock and can be delivered within 72 hours when purchased either via the SensorsOne buy online website or with a purchase order
The LEX1 high accuracy digital pressure gauge has a standard accuracy of 0.05% of full scale with enhanced precision options of 0.025% and 0.01% of full scale if required.
A complete selection of pressure ranges are available: -1 to 2bar, -1 to 20bar, 200bar, 400bar, 1000bar gauge or absolute.
If an absolute range is chosen for the Lex 1 digital manometer it can be easily converted to gauge reference pressure by using the zero tare feature so the display reads zero pressure when measuring atmospheric pressure rather than a reading close to 1000mb.
The display features of the Lex-1 digital test gauge also include 13 pressure units: bar, psi, mbar, inHg, mmHg, inH2O, ftH2O, cmH2O, mH2O, Kg/cm2, KPa, MPa, hPa.
The maximum or minimum pressure reading can be displayed in the lower portion of the display and can be reset to the actual pressure at anytime via the two push buttons on the pressure gauge front panel.
For continuous use, the auto off after 15 minutes since last key press can be turned off if required for use as a process pressure gauge.
For hazardous environments the Lex1 portable pressure indicator is Atex approved for intrinsic safety with a II 1 G EEx ia IIC T6 or T5 certification.
The Lex-1 digital pressure comparator utilises silicon strain gauge technology to achieve a high precision accuracy and stability of pressure measurement over time and the instrument need only be calibrated once per year as part of ISO9000 compliance to maintaining a traceable calibration standard.
The Lex 1 digital pressure gauge is a convenient compact size measuring only 59x95x32mm and with a battery capacity of 2000 hours from a single small CR2430 battery it is a useful instrument for any factory maintenance or quality assurance engineer carrying out calibration of pressure gauges on production equipment.
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