LV-100Q - Standard Reference Leak Quartz Glass Permeation For Helium MSLD Calibration
Traditional reference leak format for the vacuum industry.
Quartz Glass permeation reference leaks are specified in many leak detection standards and procedures.
Quartz Glass Permeation Leak Standards.
1) St/St Construction for long service life.
Quartz glass reference leaks are very fragile and can be susceptible to damage if handled incorrectly. If damaged the reference leaks are costly to replace and difficult to repair. Stainless Steel components are used to provide maximum protection but careful handling is critical at all times. 2) High Precision Bellows Sealed ‘Nupro’ Shut-Off Valve.
A high integrity bellows sealed shut-off valve is included for maximum accuracy. A range of actuators is available including: Manual Rotary, Manual Toggle, Pneumatic and Electronic. 3) Temperature Correction For Calibrations.
Calibration temperature is critical, an increase in temperature would cause an increase in the output flow rate of a quartz glass reference leak. It is important to account for this variation during the calibration procedure. A typical quartz Glass Reference Leak would be expected to vary by approximately 2.9% per ºC. A reference leak’s calibration temperature will be displayed on the corresponding calibration certificate.
Calibration of a Helium Mass Spectrometer Leak Detection System against a certificated reference leak should be carried out on a daily basis, particularly if the leak detector is in regular use. This will guarantee accurate readings across the range of leak rates when in use. This process also passes the traceability of a certificate reference to the leak detection process which is important for Quality Assurance and many industrial Standards.
Many Helium Mass Spectrometer Leak Detectors (MSLD) include an internal calibrated reference leak. The leak rate valuae of the internal leak is programmed into the machine. During the machine’s calibration routine the leak is opened and the calibration is adjusted to reflect the value of the internal reference leak.
Most MSLDs can also be calibrated with an external reference leak, this calibration procedure would be performed with the reference leak connected to the test-port of the machine. The calibration process will adjust the detector’s response to reflect the value of the external leak. If the MSLD does not include an internal calibrated leak, an external calibration would be essential. HTP can manufacture reference leaks for both internal and external calibration procedures.