Question about NRS SPO Medical 903036 Check Mate Pulse Oximeter

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No reading for the blood oxygen level

I have just replaced the battery in my Chckmate oximeter. When placing my finger into the monitor, I see the following: SPO, then a beating heart, then a pulse rate which is much higher than the actual rate, then a correct pulse rate, then with two dashes in the Oxygen level indicator and then almost immediately followed by 3 dashes in the pulse rate indicator. The back up light is working. I do not have the manual that came with this product so I don't know what the 3 various symbols at the very top, which appear, are indicating. Can you help??
Thank you. Blanche Matthews

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  • rjqman Feb 23, 2009

    I have the same problem, except that I did not replace the battery, Thie indicator says the battery is fine. I cleaned the inside as best I could without any swabs or alcohol, and tried it again, and it worked ok - once - then it started to do the same thing you descirbe - the heart flashes, the pulse rate reading jumps around and is obviously wrong, and the oxygen does not indicate at all. The indicator at the top, when on, says it means a 'weak signal.' But there is no clue how to make the signal strong. I plan to use alcohol tomorrow and swab out the finger insertion area and see if that fixes it or not. I do not have any with me - I am traveling and in a hotel. I think that something needs cleaning in there, but it is just a guess. the instructions can be downloaded easily and they say how to clean it, so I will try that.



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OK - I had the exact same problem. I cleaned the inside of the oximeter with a cotton swab and denatured alcohol. Then tried it. It did not work. Darn. But I tried it an hour later, and suddenly, it started to work perfectly. I do not know what went wrong, and why it did not work immediately after cleaning. Maybe it was still damp from the alcohol? Unlikely, but I cannot figure out anything else. Anyway, try that and see if it solves the problem for you, and if the oximeter does not work for the first hour or so after cleaning, don't give up on it. Good luck.

Posted on Feb 24, 2009


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