Calibration device for multi-parameter simulator

Multi-parameter simulator is famous because of its more parameters in use and cumbersome steps in calibration. This paper introduces a device which makes the calibration more convenient without oscilloscope, programmable amplifier, programmable filter and stabilized voltage supply. With this device, the key parameters of simulator can be traced back to National Standard. The paper also gives the feasibility analysis of Levkov method which is widely used in electrocardiograph and presents the improving method against its reduction in QRS-wave of ECG.