The main feature of BetaCAP60-3G is of having three gas inputs that may be mixed in whichever ratio : typically the inputs are used by one gas to be measured, one cross interfering gas and one diluting gas.  Measured gas and interfering gas dilution may be set according to the user requirement, and diluting gas is a dependent variable.

Display CAP60The dilution space is well shown by the operating menu : the base of the triangle indicates  60 steps of the measured gas dilutions, the left vertical side indicates 60 steps of the interfering gas dilutions and the triangle hypotenuse indicates the condition without diluting gas (Kdil.1+Kdil.2 = 60/60).  All the points internal to the triangle are a combination of the three inputs.

The diluter offers then two main functions : linearity tests and cross interference tests, but it may also be used for repeatability tests and sensitivity tests (using suitable span gases).   As all the BetaCAP dividers family it’s built with nearly equal capillaries, in a compact and corrosion proof manifold and is equipped with electronic PID pressures control.

CAP60-3G_SCH_BigThe fact of having two modules, each with a group series with identical number of capillaries, complying with the 2^n progression did allow us to setup an interesting “Self calibration” procedure : gas diluters result is a pure number, the dilution ratio, which don’t require accurate flows, but accurate flows ratio.  This did allow us to get as reference the flow through one capillaries group and to make a series of comparisons calculating the errors of all the remaining grups.  People interested in knowing the details may click the following link (we may assure it’s a new idea) : or :

The identified errors (due to not perfect equality of the used capillaries) may be corrected with one click : it runs.

Size : 430 x 244 h 341 mm