Design Philosophy

High integrity testing requires that all leaks be measured under controlled pressure conditions and that accuracy and repeatability are maintained. This is achieved by the use of a sensitive, stable pressure regulator controlling the inlet conditions. Many variations for controlling pressure, pressure rise and fixed flow have been built for the most demanding of applications.

The resulting Leak Rate Monitor may be packaged either as a laboratory bench instrument or as a portable, rugged in-plant test system complying with ANSI/ANS 56.8 for both B & C type testing.

Chell’s design philosophy includes the simplification of user operation, improved measurement sensitivity and precision and reduced operational maintenance.

Each design offers large, easily visible LED displays for clear and unequivocal leak rate and pressure readings in both low and high brightness environments. The most popular configuration consists of a display of the applied leak test pressure with up to three displays of differing, overlapping leak rate ranges.

The operator has only to attach to a penetration, open the isolation valve, adjust the precision regulator to the required test pressure and read the resultant leakage rate.
Direct leak rate measurements are made using high precision Thermal Mass Flow Meters that are inherently immune from the effects of varying gas and ambient temperatures, thus removing the most common leak rate instrument errors.

For further specification please download the PDF data sheet (637kb).

An order configuration sheet is also available. Click here to download LRM pdf configuration sheet (15KB)

The FMS1000-3C is a three channel gas flow measurement system which is used as a transfer standard for field testing and accuracy verification of various makes of LRM's and LLRT's. The operator commands the gas flow rate delivered, which controls and accurately measures the flow rate, simulating various leakage rates. Three separate flow channels, with ranges of 50sccm, 1, and 20.0 slpm of Air full scale (other ranges available) offer errors of better than 0.5% of range. As well as field verification and calibration, this is valuable tool for training new LLRT and LRM operators before going on site.

For further specification please download the FMS1000- 3C PDF data sheet (194kb).