Are you using the current souce or pullup/pulldown resistor method? We are using Current Source method for Lead off Detection. What current magnitude are you using? Initially 6 nA. Now Changed to 24 nA to faster Lead off detections. What is your lead-off frequency? LOFF - Register value is EF : Lead off Frequency is 11 : DC lead-off detection turned on Were the machines being rigorously tested during the few days before the problem presented itself? Yes, It was tested properly passed after 7 days testing. Are the symptoms the same on both machines? Did the issues appear at the same time on both machines? both the machines have same problem/Symptoms but time is different in both the machines. What is the ECG cable connection to the board like? Can you take a picture? Attached the picture of ECG Cable Connection to the board. For the second case on Issue No1, is the reading correctly displayed with the ECG cable is connected? Reading is displayed with graph properly when connected to the patient. Is there any noise on the supplies? There is no noise observed from Supplies Additional Observation From Failed Machines is ADS1294R Reference voltages -2.5V and +2.5V pins are getting shorted. In these machines ECG Graphs are not displayed when connected to the patients. Why the Pins are getting shorted after working 1 or 2 months good. How many channels(RA,LA,LL,Chest,RL) do we need to route to RL DSENSEP and RLDSENSEN and what is the practical usage of this RLD in Lead off Detections.
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