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An E1 error can mean a number of things depending on the brand of your monitor and the way that you are trying to take your blood pressure. The general reason for E1 errors is to announce for whatever reason that the machine could not get a blood pressure reading.
Some common causes:
You did not let all of the air out of the blood pressure cuff before trying to take your blood pressure. Make sure that there is no air in the cuff by squeezing it or rolling it, prior to use to let out excess air.
Your blood pressure cannot be taken at this time. Sometimes this occurs if you are very nervous, overly excited, or have a fast heart rate. You can try sitting down and relaxing prior to taking your blood pressure.
You are using the wrong size cuff. If you are taking blood pressure on a small child, someone with a tiny arm, or someone with a large arm, the blood pressure cuff might not get an accurate reading. Many blood pressure monitor manufacturer's offer blood pressure cuffs ranging in size from small to extra large, and you should use the cuff that is most appropriate for the size of your arm.
You didn't line up the blood pressure cuff correctly on your arm. You can't just slap the cuff on your arm and expect it to work, it has to be lined up properly. Many companies put an arrow on the cuff to give you an idea with positioning.
You need to try a different spot on your arm. Occasionally some people cannot give a blood pressure reading on their upper arm for a variety of reasons, and you should try getting a reading on your lower arm.
If you are still having trouble with your blood pressure cuff, take your monitor with you to your next doctors appointment so that your doctor can show you how to use the monitor correctly.
Look fo leak in tubing or cuff. Probably pinhole in cuff (watches or rings and stuff can puncture it sometimes).
put the tubing under water and pump up, looking for bubbles... My suggestion. If no bubbles, pump one-way valve is probably failing or has a dirt all stuck in it holding it open and so leaking to cause not pumping correctly.
On other blood pressure monitors from Life Source, the error 3 means that the blood pressure cuff isn't inflating properly. The cuff could be incorrectly fastened or the air connector is backwards or not connected to the cuff or the monitor. Check this on your monitor.
From manual at pag.3: err code 3Appears when pressure value did not increase during cuff inflation: 1) cuff is not fastened 2) air connector is not connected properlMake sure cuff tube is properly connected to monitor, cuff is securely fastened and exhaust rate is between 2 mmHg and 5 mmHg. Make sure air connector is inserted properly into tube and monitor. refer to manual