The main calibration of the analyser should be proceeded by the manufacturer.

The most important internal sensor values are checked automatiocally continopusly in internal processes.


For controlling the starting values of the measuring range and the end values of the measuring range, zero or testing gas is used instead of gas to be measured. These gases must correspond to the measured-gas composition because besides to the paramagnetism of oxygen, the measured value corresponds to the quotient of Cp * dens./ ETA (specific heat x density / Viscosity) of' the companion gas.

Table  indicates this companion gas influence.

nfluence of different gases on the magnitude of the measuring signal related to N2 = 1.0.

The values indicated are guide values and only apply to measuring ranges of up to approximately 10 vol.% of 02

       Argon        Ar        - 0.54

       Helium        He        - 0.55

       Nitrogen        N2        - 1.00

       Carbon oxide        C0        - 1.00

       Hydrogen        H2        - 1.5

       Carbon dioxide        C02        - 1.51

       Nitrous oxide        N20        - 1.65

       Methane        CH4        - 2.1

       Sulphur dioxide        S02                 - 1.4

       Ammonia        NH3        - 2.05

       Acetylene        C2H2        - 2.75

       Ethylene        C2H4        - 2.7

       Ethane        C2H6        - 3.9.

       Propane        C3H8        - 4.2

       Butane        C4H10        - 3.1

       Vinyl chloride        C2H3Cl        - 2.1.

For particular applications it is necessary to scavenge the casing with scavenging gas.

Zero gas

Is used for setting the zero point according to. 5.1.

The requirements placed on the measuring gas are to be maintained.

Testing gas

Serves for setting the measuring range according to Section 5.2.

The testing gas shall contain an oxygen concentration of 80 to 100 % of the measuring span.

If it is not possible to fill  the testing gas into presssurized bottles, substitutional testing gas is used.

In this case, the right curve of the substitutional testing gas is part of the test documents.

The requirements placed on the measured gas shall be maintained.

Confer also to Section 9 ,Delivery of testing gas mixtures'.

Scavenging gas

Fresh air or inert gas are used as scavenging gas with a flow rate of 30 to 80 l/ h. Due to this scavenging, the analyser PERMOLYT 3 is not explosion-proof.

The design of the measuring equipment must meet the mentioned requirements ,and allow visual inspections of its right function.