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ECG Test Solution

CMRR 2.0 – Common Mode Rejection Ratio Tester Specially designed for Common Mode Rejection Ratio

Test, this tester is supplied with two breakout boxes to

the suit different standards. One breakout box is used

for IEC60601-2-25 (formerly IEC60601-2-51:2003),

IEC60601-2-27, IEC60601-2-47 and China YY0782.

Another breakout box is used for ANSI/AAMI EC11,

EC13, China YY1139, China YY1079 and China YY0885.

Key Features

CMRR test for all types (1/3/5/12 leads) ECG

Build-in transformer to supply the required 20 Vrms

Build-in patient to earth 200 pF capacitance

Double shield construction built according to standards

DC offset ±300 mV

Wiring diagram of the WhaleTeq CMRR 2.0

Technical Specifications

Imbalance impedance, resister: 51 kΩ ±1%

Imbalance impedance, capacitance 47 nF ±5% (ANSI/AAMI ±5%)

Series capacitance 100 pF ±5%

Double shield construction according to various IEC standards (all standards are the same).

DC offset: Internal battery powered, +/-300 mV ± 1%

Internal >4:1 transformer allowing a normal function generator to supply the required 20 Vrms

Internal 50 MΩ 1000:1 divider to allow direct monitoring of the common mode voltage (10 Vrms), ratio

accuracy is ±2%

Extra sine wave generator (5 Vrms) and battery powered DMM (measure AC voltage to 1 mV) are required

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ECG Test Solution

Breakout Boxes

WhaleTeq CMRR 2.0 is supplied with two breakout boxes to suit the different standards.

BB-C1 (ECG Breakout Box): The test circuit in ANSI/AAMI EC11, EC13, China YY 1139, China YY 1079 and

China YY 0885 are the same except that all lead electrodes have 51 kΩ/47 nF, and except one which is

directly connected to the inner shield. This ECG breakout box is identical to the breakout box which is used

with the WhaleTeq SECG and MECG.

BB-C2 (CMRR ECG Breakout Box) : IEC60601-2-25 (formerly IEC60601-2-51), IEC60601-2-27, IEC60601-2-47

and China YY 0782 requires all leads to be shorted to inner box with only one lead electrode having the

impedance of 51 kΩ/47 nF. To implement this, a special breakout box is used which shorts all terminals to

the inner shield, with a 11th terminal which has both the impedance and DC offset.

BB-C1 BB-C2

Standards

The latest revision CMRR 2.0 has been updated in compliance with the latest 2011 and 2012 editions of the ECG

standards.

Common mode rejection ratio (CMRR) tests for IEC60601-2-25:2011 (formerly IEC60601-2-51:2003),

IEC60601-2-27:2011, IEC60601-47:2001/2012, ANSI/AAMI EC11, ANSI/AAMI EC13, China YY 1139,

China YY 1079, China YY 0885 and China YY 0782

Connectivity

Female D15 connector can be directly connected to ECG lead wires or go through an external breakout box

Function Generator Input, allow input of a 5 Vrms mains frequency sine wave form

Monitor, used to monitor 10 Vrms applied voltage

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ECG Test Solution

Ordering Information

Model

CMRR 2.0

Accessories

BB-C1: ECG Breakout Box (General purpose ECG test and for ANSI/AAMI EC11, EC13, ChinaYY1139, China YY1079 and China YY0885 CMRR tests)

BB-C2: CMRR ECG Breakout Box (for IEC60601-2-25/51/27/47 and China YY0782 CMRR tests)

Function Generator Options

Tektronix AFG2021

Agilent 3320A

Rigol DG1022

Warranty

One year warranty.

WHALETEQ Co., LTD

service@whaleteq.com

For further information, please visit www.whaleteq.com