The CMRR tester combining accuracy,convenience and test automation all together. Compliant with IEC 60601-2-25, IEC 60601-2-27, IEC 60601-2-47, IEC 60601-2-26, YY1079, YY1139, YY0782, YY0885, ANSI / AAMI EC11, ANSI / AAMI EC13. Applicable for R&D, compliance and production line testing.


  • CMRR Tester designed for diagnostic ECG, monitoring ECG, ambulatory ECG and EEG monitor.
  • Extreme shielding structure, built-in sine wave generator and Vc voltage measurement circuit assure the accuracy of output signal.
  • Exclusive shielding covers can be added for higher CMRR requirement.
  • Touch screen maximizes the test efficiency in standalone operation.
  • PC software operation allows to control and conduct test via mouse clicks.
  • Optional Standard Assistant software pack simplifies the medical standard with test sequences, options, parameters and pass criterions.
  • Software Development Kit (SDK) assists user to develop customized or automated test software with less efforts.



Item Option Specifications
Supply voltage 0.5 / 2.828 / 20 / 2 / (70.71) (Vrms) ±1%
CM point voltage 1.414 / 10/ 1/ (35.355) (Vrms) ±1% ( 0.25Vrms ±2% )
Frequency 50 / 60 / 100 /120 (Hz) ±1%
Electrode with Impedance Change electrode via the touch screen of CMRR 3.0 None/RA/LA/LL/V1/V2/V3/V4/V5/V6 /ALL
Electrode without Impedance Change electrode via the touch screen of CMRR 3.0 RA/LA/LL/V1/V2/V3/V4/V5/V6
Imbalance impedance, R 51kΩ 51kΩ ±1%
Imbalance impedance, C 47nF 47nF ± 5%
DC offset Internal battery powered, can be added on RA/ LA/LL/V1~V6 300mV ± 1% Up to 40hrs with intermittent use
100 pF capacitor Use 11:1 (110MΩ:10MΩ) voltage divider to measure indirectly 100pF ± 5%
Environment Intended for normal laboratory environment. The selection of critical components is known to be stable in the range shown. The 110MΩ divider may be affected by high humidity in excess of 85% 15 – 30°C
10 – 75% RH

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