Method and apparatus for checking the signal path of a measuring

Details Method and apparatus for checking the signal path of a measuring Method and apparatus for checking the signal path of a measuring

1986-10-09

1989-02-21

Anderson, Bruce C.

Radiant energy

Invisible radiant energy responsive electric signalling

Including ionization means

250282, G01T 1185, B01D 5944

Patent

active

048067652

ABSTRACT:
The disclosure relates to a method and apparatus for checking the signal path in a measuring system of the type having a collector for charged particles and an amplifier connected to its output to form a voltage or current signal. To permit sensitivity tests with currents on the order of 10.sup.-12 A and less, it is proposed that a capacitive current, produced by means of a influencing electrode situated in the vicinity of the charge collector, be fed into the charge collector. An electrode already present in the measuring system can be used as the influencing electrode.

REFERENCES:
patent: 4215411 (1980-07-01), Franzen
patent: 4327289 (1982-04-01), Solomon
patent: 4336455 (1982-06-01), Bryant
patent: 4495413 (1985-01-01), Lerche et al.
patent: 4540884 (1985-09-01), Stafford et al.
patent: 4665315 (1987-03-01), Bacchetti et al.

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