On Thursday, 21 September 2017 15:43:44 UTC+1, Harry Bloomfield wrote:
I have the doctors panicking over my high blood pressure. So I dug out
a digi BP monitor we had for a few years #1. That had a problem with
its over pressure safety valve, which I repaired whilst waiting for a
new one to be delivered. It's readings were completely inconsistent, so
today (still waiting for #2 to arrive), I went out and bought an over
the counter #3.

#3 (a cuff auto digital) seems to provide consistent values, no rapid
wild variations, but how to be sure the displayed readings are correct?

I have already been advised that any of the larger pharmacists should
have a device to check the calibration of BP monitors, but I wonder if
there might be a way to check it at home?

Try it out on a few other people. Young and old.