A katharometer bridge circuit with linearising feedback
W P J Holland; W Boender; W P J Holland; Central Res. Lab., Med. Fac., Erasmus Univ., Rotterdam, Netherlands; W Boender; Central Res. Lab., Med. Fac., Erasmus Univ., Rotterdam, Netherlands
Журнал:
Journal of Physics E: Scientific Instruments
Дата:
1986-09-01
Аннотация:
A katharometer for determining the concentration of helium in air in the range 0-100% was coupled to an electronic feedback bridge supply circuit. It was found that an optimal feedback gain exists for which the measurement non-linearity reaches a minimum value of 1%, which is 15 times better than with the conventional constant voltage bridge supply.
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