New Weld Purge Monitor for Welding LNG tubes and pipes
The Company that launched the first Weld Purge Monitor in 1975, Huntingdon Fusion Techniques Limited (HFT), has introduced a new dedicated Weld Purge Monitor™ especially for LNG stainless steel and Nickel alloy tube and pipe joint welding.
A Weld Purge Monitor™ is necessary to show welders when sufficient oxygen has been removed from the work zone to allow welding to begin and to make safe, oxide free welds, without the discolouration and coking that might otherwise occur.
Having developed a number of versions over a period of 30 years, HFT has embraced evolving and advanced technology to create a new instrument designated the Argweld® PurgEye® 100 that offers significant advances over all other instruments intended for the application of weld purging of LNG industry tubes and pipes.
Principal PurgEye® 100 Features
Designed for Welding
From the outset, HFT set about to design their instruments to suit the welding environment.
The principle consideration was to build electronics that would make readings accurate at the lowest level of oxygen sensor technology.
Weld Purge Monitors™ need to give their users total accuracy at the other end of the scale, to show welders when all of the oxygen is now absent, to a particularly low level.
Furthermore, within the welding environment, there are lots of stray electromagnetic signals that interfere with electronically operating products and the production of stable, correct readings. So our experience of 'electromagnetic shielding' of welding electronics has been very valuable in the design of the PurgEye® 100.
Zero Calibration Facility
The new Huntingdon Fusion Techniques ‘Integrated Auto-calibration’ feature, calibrates at the press of a button. The start level of 20.94% is shown instantly. Then once purging has reached the lowest oxygen level, the button can be pressed once more, to calibrate that reading precisely giving instant calibration at 0.01% O2
No need for Monitors to be returned to the Factory for Yearly Calibration
These new HFT monitors do not need to be returned to the factory for the time consuming and expensive yearly recalibration.
Another first for Huntingdon Fusion Techniques is the integration of a tripod mount facility in the housing of the instruments.
Monitors can now be located securely in an accessible viewing position without having to resort to additional clamping fixtures and eliminating the risk of instruments falling to the ground, often from great heights.
Protective Rubber Housing
In the event that customers have a policy about instrument protection and security, HFT does provide a rubber housing as an additional accessory with the PurgEye® 100.
Greater Digit size
The digits are 41% larger on the PurgEye® 100 than on previous models. This means that they can be seen more clearly by the operator and from further distances.
Accuracy at low level readings
The PurgEye® 100 has an algorithm in the software to correct the reading at the low oxygen levels to ensure accuracy and repeatability of readings.
(Most low cost Oxygen Monitors are made for oxygen measurement at breathing levels for personal safety rather than welding and they are unable to read accurately as oxygen levels fall below the atmospheric reading of 20.94% )
Low Battery Indicator
When the battery life is too low to provide sufficient power to run the PurgEye® 100 correctly, a battery symbol appears in the screen/touch screen warning the operator to change the battery.
Replace Sensor Indicator
Similarly, a sensor symbol will appear on the screen with alerting the operator change the oxygen sensor.
This particular feature is a great advantage to the user, because immediately that symbol appears, the user has time to have his purchasing department obtain a new sensor, without having to stop a job while waiting for delivery for a new one.
HFT old style instruments and other oxygen monitors have a complicated sensor wiring system that involves plugging in of wires and clips. The New Style PurgEye® 100 replacement sensor, has no wires but connects easily by simply plugging it on the brass terminal pins located within the housing.