Omron HEM-9200T Instruction Manual page 16

2. Wrap the arm cuff firmly in
place around your left
upper arm.
The bottom edge of the arm cuff
should be 1/2 inch (1 to 2 cm) above
the elbow. Air tube is on the inside of
your arm and aligned with your
middle finger.
16
1/2 inch
(1 - 2 cm)