Question about Schiller Welch Allyn Cardiovit At 2 Interpretive Ekg Machine

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V4 lead not working - Schiller Welch Allyn Cardiovit At 2 Interpretive Ekg Machine

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The Schiller AT2 is usually very reliable in terms of the pre-amplifier, which is the section of the electronics that firsts processes the incoming patient signal. Your problem most likely lies in one of three places. Most likely is your patient cable. The best way to tell honestly is substitution. Try another known good cable. The second most likely source of complaint is your Gel electrode adapters. Open each adapter and inspect the jaws, you should see only shiny metal, no gunk, paper or corrosion. You can clean minor contamination with an alcohol soaked que tip( take care not to splash alcohol into your eyes, I've done it before doing this cleaning operation. Wear safety glasses. If the corrosion cannot be removed via cleaning, then a new adapter set is called for. As your problem is specific to a certain lead, you can try swapping the adapter from V4 to a known good lead, and see if the symptom moves to the other lead, if so a new adapter set should take care of your issue, good ones run around 40-50 dollars.If neither the cable or the adapters fix your problem, I have on infrequent occasions found defective input connectors, usually the solder connections to the main PC board. If this is the case, I would recommend sending the unit to a qualified repair shop. If work is attempted on a Schiller PC board, Schiller will no longer exchange it, and you only recourse would be to replace the board, at a price in excess of 2000.00. Otherwise, it can be exchanged for far less. We repair these boards, but they are multilayer and surface mount, and this type of soldering is not for novices.

Posted on Dec 05, 2011

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