• Discovery MR750w and SIGNA™ Architect T 3.0T System Service Methods
  • 5690002-2EN Revision 4
  • Object ID: 00000018WIA30208110GYZ
  • Topic ID: id_2004080 Version: 6.12
  • Date: Oct 11, 2021 6:31:29 PM

Checking the ECG leads

Testing the electrical connections on the ECG cables

Prerequisites

Personnel requirements
Required personsPreliminary requirementsProcedureFinalization
1-5 minutes-
Tools and Test Equipment
DescriptionQuantityPart NumberManufacture
Ohmmeter1--

Procedure

  1. If not already done, disconnect the ECG cables from the PAC and from each other.
    Figure 1. PIN Diagram of ECG Lead
  2. Check the impedance of the ECG cables from each of the leads at point A to the other end of that lead at point B. The impedance should be 55k ohms to 63k ohms tolerance.
    Figure 2. Connections A and B on ECG Cables
  3. Check the impedance of the ECG cables from each lead at point B to its respective connection at point C. The impedance should be 0 ohms.
    Figure 3. PAC Assembly with ECG Loads Connected
  4. Connect the white high impedance MRI ECG lead wires to the gray ECG patient cable by matching the colors on the white cable to the colored dots on the gray cable.
  5. Plug the open end of the gray ECG patient cable into the ECG port of the PAC.