I have a 3MQ1-LF bp monitor. I am trying to

With power on, showing only clock.
Press M button, then press Power button together.
About 10 seconds, it'll display CL on screen.
Lift up your finger, CL will flashing.
Then press M button once, you'll hear 3 beep
Done.

price

Hold the memory button in for 7 seconds.

This is manual is for the Life Fitness unit that you have (I have the same one) but the images in the manual don't have the Life Fitness branding on them. The unit was made for Life Fitness by Microlife USA.

http://www.microlifeusa.com/files/manual/files/3MQ1-LF_IB.pdf

contact your vendor.

You should not recheck BP until at least 15 minutes after the first check because it will always get higher on reading even with a manual BP machine. As a retired nurse I have both an automatic HoMedics which I I lost the manual for and a old type arm BP cuff. My automatic is pretty close to the other cuff in readings so I know it is close. Try waiting for a while before you recheck and not talk or move around when you take it.

Try 5 to 10 minutes between readings, all at the same conditions: seated on chair, lean back, feet on ground.....