Aiming at problem of humidity-sensitive capacitor batch detection which affects yield and quality

a multi-channel humidity-sensitive capacitor automatic test system based on virtual instrument is proposed. The fourwire measurement method is adopted

and the system integrates LCR meter

multi-channel switch

test fixture and upper PC software

which realizes testing of 8 channels humidity-sensitive capacitor at the same time. By using the methods of open circuit

short circuit and load compensation

the system error is eliminated. The test data can be acquired

data are analyzed

calculated displayed and playbacked by upper PC software. Experimental results show that the system meets the requirements of friendly interface

convenience in use

and the precision of the whole system is up to 0. 8 % at certain frequency range

the test efficiency and precision of the humidity-sensitive capacitor is improved effectively.