Have HEm-780 and the cuff is too big. how does that effect my readings. Can I order smaller cuff?

the numbers should move as it's calculating your blood pressure , but once it finnishes the test the numbers should lock in and not change till a new test is made

and somethng thats not in any of these machines manual , allways place cuff in same spot on your arm after rolling up your sleeve i use a freckle as my landmark for this , they dont like to work too well over shirt sleeves

is it a 780 or a 731? found manual for 780; http://omronhealthcare.com/wp-content/uploads/hem-780-instruction-manual.pdf nothing on 731. Try removing the battery for 10 min to reset all. May be time to replace.

You can find your instruction manual for your Omron HEM-780 here... http://www.omron-healthcare.com/en/product/blood_pressure_monitors/All/HEM-780-E.html

here is a link to the manual http://www.omronhealthcare.com/products/hem-780/

Recalibration normally has to be done by the manufacturer. As they have to certify the calibration. Keep in mind, that it is not unusual for your BP to read a bit higher at the doctor's office, than it does at home. It's sarcastically called "White coat hypertension." Which translated means, your blood pressure rises a bit at the doctor's office due to anxiety. Or it's being taken at a different time of day, than you take it at home, in a relaxed atmosphere.

Hope this helped you.

You can get the manual on the link below.

http://www.omronhealthcare.com/media/uploads/hem-780-instruction-manual.pdf

Part of the problem may the the placement of the cuff. Generally, if it's not placed correctly. the cuff will re-inflate trying to find the correct stopping point for inflation. Any movement of your arm could cause this. Also, if you haven't replaced the batteries lately, you should do that. Also check to make sure there are no air leaks in the rubber tubing or the cuff. Check your Owners Manual for the exact placement of the cuff.

It appears you may have a leak in the cuff. This will need to be verified by an authorised service facility. Contact OMRON they should be able to assist you.
CONSUMER SUPPORT TOLL FREE NUMBER: 1-877-216-1333

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Get a manual at :
http://www.omronhealthcare.com/product/manuals.asp

first take the blood pressure and once it has read your pressure then push the button to which user you want the pressure to remain on either A or B.